Merge branch 'master' of http://git.j3d1.de/KKK/KlassischeKeplerKriege

CMakeLists.txt

@@ -8,7 +8,7 @@ function(setup_target NAME)
   set_property(TARGET ${NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
   target_compile_options(${NAME} PRIVATE -Wall -Wextra)
   target_compile_options(${NAME} PRIVATE -fdiagnostics-color=always)
-  target_compile_options(${NAME} PRIVATE $<$<CONFIG:DEBUG>:-ggdb -O2>)
+  target_compile_options(${NAME} PRIVATE $<$<CONFIG:DEBUG>:-ggdb -O0>)
   target_compile_options(${NAME} PRIVATE $<$<CONFIG:RELEASE>:-O3 -NDEBUG>)
 endfunction(setup_target)
 

data/mesh/rocket.scad

@@ -0,0 +1,18 @@
+$fn = 16;
+
+translate([0, 0, -0.2]) {
+    cylinder(r=0.05, h=0.4);
+    translate([0, 0, 0.25]) cylinder(r=0.065, h=0.1);
+    translate([0, 0, 0.35]) sphere(r=0.07);
+    translate([0, 0, 0.35]) cylinder(r=0.01, h=0.2);
+
+    for (h=[0.07, 0.2]) {
+        translate([0, 0, h]) {
+            for (i=[0,1,2,3]) {
+                rotate([0, 0, 90*i]) {
+                    cube([0.2, 0.01, 0.07], center=true);
+                }
+            }
+        }
+    }
+}

data/shader/background.frag

@@ -0,0 +1,13 @@
+#version 120
+
+uniform sampler2D texture;
+
+varying vec3 vertex;
+varying vec2 uv;
+
+void main()
+{
+  vec3 color = texture2D(texture, uv).rgb;
+
+  gl_FragColor = vec4(color, 1.0);
+}

data/shader/background.vert

@@ -0,0 +1,12 @@
+#version 120
+uniform vec2 uvScale;
+
+varying vec3 vertex;
+varying vec2 uv;
+
+void main()
+{
+  gl_Position = gl_Vertex;
+  vertex = gl_Position.xyz;
+  uv = uvScale * (0.5 + vertex.xy / 2.0);
+}

data/shader/gameobjects.frag

@@ -10,6 +10,10 @@ uniform vec3  materialColor;
 uniform int   materialKind;
 uniform int   materialSeed;
 
+uniform int   explLightsNum;
+uniform vec3  explLightsPos[10];
+uniform float explLightsIntensities[10];
+
 void main()
 {
   vec3 Eye       = normalize(-vertex);
@@ -27,7 +31,31 @@ void main()
   vec3 color = materialColor;
   color = max(vec3(0.0), min(vec3(1.0), color));
 
-  vec3 IDiffuse  = vec3(color) * lightColor * max(dot(normal, lightDirection), 0.0);
+  vec3 light = lightColor * max(dot(normal, lightDirection), 0.0);
+  //vec3 light = vec3(0.0);
+
+  int i;
+  for (i=0; i<explLightsNum; i++) {
+    vec3 explLightColor = vec3(1.0, 0.5, 0.2);
+    vec3 diff = vertex - explLightsPos[i];
+    float l = 10.0*length(diff);
+    float dir = max(0.0, -dot(normal, diff));
+    float dp = max(0.0, 1.0-l);
+
+    float intensity = 10.0;
+    if (dp == 0.0) {
+        intensity *= dir;
+    } else {
+        intensity *= dp;
+    }
+    intensity /= 1.0 + 0.5*l*l;
+
+    light += intensity * pow(explLightsIntensities[i], 2.0) * explLightColor;
+  }
+
+  light = max(vec3(0.0), light);
+
+  vec3 IDiffuse  = vec3(color) * light;
 
   // TODO make instensity/exponent as parameter
   //vec3 ISpecular = lightColor * 5.0 * pow(max(dot(Reflected, Eye), 0.0), 2.0);

data/shader/gameobjects.vert

@@ -9,11 +9,12 @@ varying vec3 lightDirection;
 
 uniform mat4 model;
 uniform vec3 lightPosition;
+uniform float aspectRatio;
 
 void main()
 {
   // TODO: this becomes invalid when projection matrices are used
-  vec3 p = (model*vec4(in_vertex, 1.0)).xyz;
+  vec3 p = (model*vec4(in_vertex/vec3(aspectRatio, 1.0, 1.0), 1.0)).xyz;
   lightDirection = normalize(lightPosition - p);
 
   vertex = p.xyz;

data/shader/particle.frag

@@ -4,7 +4,8 @@ varying vec3  velocity;
 varying float decay;
 
 varying float explCenterDist;
-uniform vec3  explCenter;
+
+float pi = 3.14159;
 
 vec3 hsv2rgb(vec3 c)
 {
@@ -13,15 +14,28 @@ vec3 hsv2rgb(vec3 c)
     return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
 }
 
+float hash(float n)
+{
+    return fract(sin(n)*43758.5453);
+}
+
 void main()
 {
-    float r = length(vertex);
-    if (r > 1.0) {
+    // normalize radius from 0..1
+    vec2 vn = 2.0*vertex;
+    float rn = length(vn);
+    float angle = atan(vn.y, vn.x);
+    float hs = 20.0;
+    float removeCorners = 0.5 * (hash(fract(hs*vertex.x)) + hash(fract(hs*vertex.y)));
+    if (rn+removeCorners > 1.0) {
         discard;
     }
 
+    //float rf = 0.5-0.5*rn;
+    float rf = 1.0;
+
     float d = decay/(1.0+max(0.0, 1.0-2.0*explCenterDist));
-    float h = (1.0-d)/6.0;
+    float h = max(0.0, (1.0-d)/6.0) * rf;
     float v = max(0.0, (1.0-log(d)));
     float s = max(0.0, min(30.0 * sqrt(decay) * explCenterDist, 1.0));
 
@@ -31,4 +45,5 @@ void main()
     gl_FragColor = vec4(hsv2rgb(vec3(h, s, v)), 1.0);
 
     //gl_FragColor = vec4(1.0, 1.0, 0.0, 1.0);
+    //gl_FragColor.rgb = vec3(0.5+0.5*(a/pi));
 }

data/shader/particle.vert

@@ -1,7 +1,8 @@
 #version 120
-attribute vec2 in_vertex;
-attribute vec3 in_position;
-attribute vec3 in_velocity;
+attribute vec2  in_geometry;
+attribute vec3  in_position;
+attribute vec3  in_velocity;
+attribute float in_maxDist;
 
 uniform float age;
 uniform float size;
@@ -14,6 +15,8 @@ varying vec3  velocity;
 varying vec2  vertex;
 varying float explCenterDist;
 
+uniform float aspectRatio;
+
 // TODO: rotate to face the user!
 void main()
 {
@@ -26,11 +29,17 @@ void main()
   decay = ageMod / halfAge;
 
   // faster particles are smaller
+  // TODO: scale by time too! scale down fast after 3 halfAges
   float scaleBySpeed = (1.0 - 0.95*length(in_velocity)/maxVelocity);
-  float finalSize = size * scaleBySpeed;
-  vec2 base = in_vertex;
-  vec3 p = finalSize*vec3(base, 0.0);
-  vec3 offset = (0.2*age + log(1.0+age*5.0)) * in_velocity + in_position;
+  float finalSize = size * scaleBySpeed * (1.0-max(0.0, decay-3.0*halfAge)/2.0);
+  vec2 base = in_geometry;
+  vec3 p = vec3(finalSize*base, 0.0);
+  vec3 move = (0.2*age + log(1.0+age*5.0)) * in_velocity;
+  float md = length(move);
+  if (md > in_maxDist) {
+    move *= in_maxDist / md;
+  }
+  vec3 offset = move + in_position;
   p += offset;
 
   gl_Position = vec4(p, 1.0);
@@ -38,5 +47,5 @@ void main()
   vertex   = base.xy;
   velocity = in_velocity;
 
-  explCenterDist = length(explCenter-offset);
+  explCenterDist = length(explCenter - offset);
 }

game/CMakeLists.txt

@@ -4,6 +4,7 @@ find_package(OpenGL REQUIRED)
 find_package(epoxy REQUIRED)
 find_package(X11 REQUIRED)
 find_package(assimp REQUIRED)
+find_package(PNG REQUIRED)
 
 set(GAME_SRC
     main.cpp
@@ -11,14 +12,22 @@ set(GAME_SRC
     glclasses.cpp
     game_window.cpp
     renderer.cpp
+
+    developer_console.cpp
+
     renderer_polygon_2d/renderer_polygon_2d.cpp
+
     renderer_polygon_3d/renderer_polygon_3d.cpp
     renderer_polygon_3d/polygon_model.cpp
     renderer_polygon_3d/particle_batch.cpp
+    renderer_polygon_3d/image_texture.cpp
+
     renderer_ray_tracer/renderer_ray_tracer.cpp
 
     network/session.cpp
 
+    sound/sound_effects.cpp
+
     util.cpp
     game.cpp
 
@@ -33,9 +42,17 @@ set(GAME_SRC
     state/state.cpp
 )
 
+set(SOUND_LIBRARIES "")
+
+    # TODO: make optional!
+#set(GAME_SRC ${GAME_SRC} sound/sound.cpp)
+#set(SOUND_LIBRARIES -lportaudio -lsndfile)
+set(GAME_SRC ${GAME_SRC} sound/dummy_sound.cpp)
+
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 include_directories(${OPENGL_INCLUDE_DIR})
+include_directories(${PNG_INCLUDE_DIR})
 include_directories(${CMAKE_SOURCE_DIR}/libs/glm/)
 include_directories(${CMAKE_SOURCE_DIR}/libs/asio/asio/include/)
 include_directories(${assimp_INCLUDE_DIRS})
@@ -43,4 +60,5 @@ include_directories(${assimp_INCLUDE_DIRS})
 add_executable(game ${GAME_SRC})
 setup_target(game)
 
-target_link_libraries(game X11 epoxy pthread ${assimp_LIBRARIES} assimp)
+target_link_libraries(game X11 epoxy pthread ${assimp_LIBRARIES} assimp
+    ${SOUND_LIBRARIES} ${PNG_LIBRARIES})

game/developer_console.cpp

@@ -0,0 +1,74 @@
+#include "developer_console.hpp"
+
+#include <iostream>
+
+#include "util.hpp"
+
+namespace developer {
+    DeveloperConsole s_instance;
+
+    DeveloperConsole::CallbackResult DeveloperConsole::CallbackResult::createError(const std::string &answer)
+    {
+        return CallbackResult(false, answer);
+    }
+
+    DeveloperConsole::CallbackResult DeveloperConsole::CallbackResult::createOkay(const std::string &answer)
+    {
+        return CallbackResult(true, answer);
+    }
+
+    DeveloperConsole::CallbackResult::CallbackResult(bool okay, const std::string &answer)
+        : okay(okay), answer(answer)
+    {
+    }
+
+    DeveloperConsole::DeveloperConsole()
+    {
+    }
+
+    // static thing.
+    DeveloperConsole &DeveloperConsole::instance() {
+        return s_instance;
+    }
+
+    bool DeveloperConsole::addCallback(const std::string &token, callback_t cb)
+    {
+        bool hasWhitespace = false;
+        for (size_t i=0; i<token.size(); i++) {
+            if (isspace(token[i])) {
+                hasWhitespace = true;
+                break;
+            }
+        }
+
+        bool cbIsNull   = (cb == nullptr);
+        bool tokenEmpty = token.empty();
+
+        if (hasWhitespace || cbIsNull || tokenEmpty) {
+            std::cout << "not registering bad token/cb comibnation for:  " << token << std::endl;
+            return false;
+        }
+
+        std::cout<<"[developer console] adding developer "
+            "callback for token '" << token << "'" << std::endl;
+
+        m_callbacks[token] = cb;
+
+        return true;
+    }
+
+    DeveloperConsole::CallbackResult DeveloperConsole::dispatchInput(const std::string &token, const std::string &payload)
+    {
+        std::map<std::string, DeveloperConsole::callback_t>::iterator it = m_callbacks.find(token);
+        if (it == m_callbacks.end()) {
+            return DeveloperConsole::CallbackResult::createError("unknown command with token: '" + token + "'");
+        }
+
+        return it->second(payload);
+    }
+
+    DeveloperConsole::CallbackResult resultOkay()
+    {
+        return DeveloperConsole::CallbackResult::createOkay();
+    }
+}

game/developer_console.hpp

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <string>
+#include <map>
+#include <functional>
+
+// TODO
+// stuff in namespace "developer" can be disabled and the game must function in
+// exact the same way just without cool debug features.
+namespace developer {
+    class DeveloperConsole {
+        public:
+            class CallbackResult {
+                private:
+                    CallbackResult(bool okay, const std::string &answer);
+
+                public:
+                    static CallbackResult createError(const std::string &answer="");
+                    static CallbackResult createOkay(const std::string &answer="");
+
+                public:
+                    // read-only interface to result data
+                    const bool        okay;
+                    const std::string answer;
+            };
+
+            typedef std::function<CallbackResult(const std::string &cmd)> callback_t;
+
+            DeveloperConsole();
+
+            // access functionality over this static singleton attribute to make
+            // it really easy and fast to use
+            static DeveloperConsole &instance();
+
+            // register callback for a token.
+            // token must not have whitespace in it and not be empty.
+            // old callback will be overridden if any
+            // return true on succes, false if not saved.
+            bool addCallback(const std::string &token, callback_t cb);
+
+            // dispatch input received over a communication channel.
+            CallbackResult dispatchInput(const std::string &token, const std::string &payload);
+
+        private:
+            std::map<std::string, callback_t> m_callbacks;
+    };
+
+    DeveloperConsole::CallbackResult resultOkay();
+}

game/game.cpp

@@ -80,3 +80,7 @@ bool Game::cycle(float dt)
 
     return true;
 }
+void Game::resize(int width, int height)
+{
+    m_state->setPlayingFieldSize(width, height);
+}

game/game.hpp

@@ -13,6 +13,9 @@ class Game {
     // for rendering
     game::State *state() const { return m_state; }
 
+    // resize the playing field
+    void resize(int width, int height);
+
   private:
     game::State *m_state;
 

game/game_window.hpp

@@ -45,7 +45,21 @@ class GameWindow : public endofthejedi::GLWindow {
         m_renderer.render(m_game->state());
     }
 
-    void resize() override { glViewport(0, 0, getwidth(), getheight()); }
+    void resize() override
+    {
+        std::cout<<"resize()" << std::endl;
+
+        glViewport(0, 0, getwidth(), getheight());
+
+        // resize the game
+        m_game->resize(getwidth(), getheight());
+
+        // TODO: mark it and let the reinit() happen in the next so it happnens just once. while doing the resize
+        m_game->state()->init();
+
+        // resize the renderer
+        m_renderer.setWindowSize(getwidth(), getheight());
+    }
 
   public:
     GameWindow(unsigned int width, unsigned int height, Game *ptr)

game/glclasses.cpp

@@ -6,136 +6,186 @@
 #include <sstream>
 
 namespace endofthejedi {
-    VAO::VAO() { glGenVertexArrays(1, &m_name); }
 
-    VAO::~VAO() { glDeleteVertexArrays(1, &m_name); }
+VAO::VAO() {}
+VAO::~VAO() { glDeleteVertexArrays(1, &m_name); }
 
-    void VAO::bind() { glBindVertexArray(m_name); }
-    void VAO::unbind() { glBindVertexArray(0); }
+void VAO::init() { glGenVertexArrays(1, &m_name); }
+void VAO::bind() { glBindVertexArray(m_name); }
+void VAO::unbind() { glBindVertexArray(0); }
 
-    void VAO::fill(GLuint index, GLint size, GLenum type,
-            GLboolean normalized, GLsizei stride,
-            const GLvoid *pointer)
-    {
-        glEnableVertexAttribArray(index);
-        glVertexAttribPointer(index, size, type, normalized, stride, pointer);
+void VAO::fill(GLuint index, GLint size, GLenum type, GLboolean normalized,
+               GLsizei stride, const GLvoid *pointer) {
+    glEnableVertexAttribArray(index);
+    glVertexAttribPointer(index, size, type, normalized, stride, pointer);
+}
+
+Shader::Shader() : m_program(0) {}
+
+Shader::~Shader() {}
+
+void Shader::init() { m_program = glCreateProgram(); }
+
+bool Shader::check() {
+    GLint len = 0;
+    GLint result = 0;
+
+    glGetProgramiv(m_program, GL_LINK_STATUS, &result);
+    glGetProgramiv(m_program, GL_INFO_LOG_LENGTH, &len);
+
+    if (result == GL_FALSE) {
+        std::cout << "getting error log:" << std::endl;
+        char *error = (char *)malloc(len + 1);
+        glGetProgramInfoLog(m_program, len, NULL, error);
+        std::string str(error);
+        std::cout << str << std::endl;
+    }
+    // std::cout << "checked program" << std::endl;
+
+    return (bool)result;
+}
+
+bool Shader::checkShader(GLuint shader) {
+    GLint len = 0;
+    GLint result = 0;
+
+    glGetShaderiv(shader, GL_COMPILE_STATUS, &result);
+
+    if (result == GL_FALSE) {
+        glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &len);
+        char *error = (char *)malloc(len + 1);
+        glGetShaderInfoLog(shader, len, NULL, error);
+        std::string str(error, error + len);
+        std::cout << str << std::endl;
     }
 
-    Shader::Shader() : m_program(0) { }
+    // std::cout << "checked shader" << std::endl;
 
-    Shader::~Shader() {}
+    return result != GL_FALSE;
+}
 
-    void Shader::init() { m_program = glCreateProgram(); }
+void Shader::bind() {
+    if (m_program == 0) {
+        std::cerr << "error: invalid to bind invalid program (0)! "
+                     "use unbind() if that was your purpose!" << std::endl;
 
-    bool Shader::check() {
-        GLint len = 0;
-        GLint result = 0;
-
-        glGetProgramiv(m_program, GL_LINK_STATUS, &result);
-        glGetProgramiv(m_program, GL_INFO_LOG_LENGTH, &len);
-
-        if (result == GL_FALSE) {
-            std::cout<<"getting error log:" << std::endl;
-            char *error = (char *)malloc(len+1);
-            glGetProgramInfoLog(m_program, len, NULL, error);
-            std::string str(error);
-            std::cout << str << std::endl;
-        }
-        //std::cout << "checked program" << std::endl;
-
-        return (bool)result;
+        exit(-1);
+        return;
     }
 
-    bool Shader::checkShader(GLuint shader) {
-        GLint len = 0;
-        GLint result = 0;
+    glUseProgram(m_program);
+}
 
-        glGetShaderiv(shader, GL_COMPILE_STATUS, &result);
+GLuint Shader::program() { return m_program; }
 
-        if (result == GL_FALSE) {
-            glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &len);
-            char *error = (char *)malloc(len+1);
-            glGetShaderInfoLog(shader, len, NULL, error);
-            std::string str(error, error + len);
-            std::cout << str << std::endl;
-        }
+void Shader::unbind() { glUseProgram(0); }
 
-        //std::cout << "checked shader" << std::endl;
-
-        return result != GL_FALSE;
+void Shader::load(const std::string &data, GLenum shadertype) {
+    if (m_program == 0) {
+        std::cout << "[shader] error: shader program is invalid (0)!"
+                  << std::endl;
+        exit(-1);
+        return;
     }
 
-    void Shader::bind()
-    {
-        if (m_program == 0) {
-            std::cerr << "error: invalid to bind invalid program (0)! "
-                "use unbind() if that was your purpose!" << std::endl;
+    GLuint shader = glCreateShader(shadertype);
 
-            exit(-1);
-            return;
-        }
+    const char *shaderdata = data.c_str();
+    glShaderSource(shader, 1, &shaderdata, NULL);
+    glCompileShader(shader);
+    checkShader(shader);
 
-        glUseProgram(m_program);
-    }
+    glAttachShader(m_program, shader);
+    glLinkProgram(m_program);
+    check();
 
-    GLuint Shader::program() { return m_program; }
+    glDeleteShader(shader);
+}
 
-    void Shader::unbind() { glUseProgram(0); }
-
-    void Shader::load(const std::string &data, GLenum shadertype) {
-        if (m_program == 0) {
-            std::cout<<"[shader] error: shader program is invalid (0)!" << std::endl;
-            exit(-1);
-            return;
-        }
-
-        GLuint shader = glCreateShader(shadertype);
-
-        const char *shaderdata = data.c_str();
-        glShaderSource(shader, 1, &shaderdata, NULL);
-        glCompileShader(shader);
-        checkShader(shader);
-
-        glAttachShader(m_program, shader);
-        glLinkProgram(m_program);
-        check();
-
-        glDeleteShader(shader);
-    }
-
-  void Shader::loadFile(const std::string &path, GLenum shadertype) {
+void Shader::loadFile(const std::string &path, GLenum shadertype) {
     std::string content;
     std::ifstream fileStream(path, std::ios::in);
 
-    if(!fileStream.is_open()) {
-        std::cerr << "Could not read file " << path << ". File does not exist." << std::endl;
+    if (!fileStream.is_open()) {
+        std::cerr << "Could not read file " << path << ". File does not exist."
+                  << std::endl;
         return;
     }
 
     std::string line = "";
-    while(!fileStream.eof()) {
+    while (!fileStream.eof()) {
         std::getline(fileStream, line);
         content.append(line + "\n");
     }
 
     fileStream.close();
     load(content, shadertype);
-  }
-
-    GLuint Shader::location(const std::string &name) {
-        return glGetUniformLocation(m_program, name.c_str());
-    }
 }
 
-void printGlError(GLenum err)
-{
+GLuint Shader::location(const std::string &name) {
+    return glGetUniformLocation(m_program, name.c_str());
+}
+
+Texture::Texture() {}
+
+Texture::~Texture() { glDeleteTextures(1, &m_name); }
+
+void Texture::init() { glGenTextures(1, &m_name); }
+
+void Texture::bind() { glBindTexture(GL_TEXTURE_2D, m_name); }
+
+void Texture::unbind() { glBindTexture(GL_TEXTURE_2D, 0); }
+
+void Texture::fill(GLint level, GLint internalFormat, GLsizei width,
+                   GLsizei height, GLint border, GLenum format, GLenum type,
+                   const GLvoid *data) {
+    bind();
+    glTexImage2D(GL_TEXTURE_2D, level, internalFormat, width, height, border,
+                 format, type, data);
+}
+GLuint Texture::getName() { return m_name; }
+
+Framebuffer::Framebuffer() {}
+Framebuffer::~Framebuffer() { glDeleteFramebuffers(1, &m_name); }
+
+void Framebuffer::init() { glGenFramebuffers(1, &m_name); }
+void Framebuffer::bind() { glBindFramebuffer(GL_FRAMEBUFFER, m_name); }
+
+void Framebuffer::unbind() { glBindFramebuffer(GL_FRAMEBUFFER, 0); }
+
+void Framebuffer::attachRenderbuffer(GLenum attachment, GLuint rbo) {
+    bind();
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, attachment, GL_RENDERBUFFER, rbo);
+}
+
+void Framebuffer::attachTexture(GLenum attachment, GLuint tex) {
+    bind();
+    glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, tex, 0);
+}
+
+Renderbuffer::Renderbuffer() {}
+
+Renderbuffer::~Renderbuffer() { glDeleteRenderbuffers(1, &m_name); }
+
+void Renderbuffer::init() { glGenRenderbuffers(1, &m_name); }
+void Renderbuffer::bind() { glBindRenderbuffer(GL_RENDERBUFFER, m_name); }
+
+void Renderbuffer::unbind() { glBindRenderbuffer(GL_RENDERBUFFER, 0); }
+
+void Renderbuffer::create(GLenum internalformat, GLsizei width,
+                          GLsizei height) {
+    bind();
+    glRenderbufferStorage(GL_RENDERBUFFER, internalformat, width, height);
+}
+}
+
+void printGlError(GLenum err) {
     if (err != GL_NO_ERROR) {
         std::cout << "opengl error is: " << stringFromGlError(err) << std::endl;
     }
 }
 
-void discardLastGlError(bool print)
-{
+void discardLastGlError(bool print) {
     GLenum err = glGetError();
     if (print) {
         printGlError(err);
@@ -143,8 +193,7 @@ void discardLastGlError(bool print)
 }
 
 // return false if there's an error
-bool checkAndPrintGlError()
-{
+bool checkAndPrintGlError() {
     GLenum err = glGetError();
 
     printGlError(err);
@@ -152,15 +201,25 @@ bool checkAndPrintGlError()
     return true;
 }
 
-const char *stringFromGlError(GLenum err)
-{
-    switch(err) {
-        case GL_INVALID_ENUM:                  return "GL_INVALID_ENUM"; break;
-        case GL_INVALID_VALUE:                 return "GL_INVALID_VALUE"; break;
-        case GL_INVALID_OPERATION:             return "GL_INVALID_OPERATION"; break;
-        case GL_OUT_OF_MEMORY:                 return "GL_OUT_OF_MEMORY"; break;
-        case GL_INVALID_FRAMEBUFFER_OPERATION: return "GL_INVALID_FRAMEBUFFER_OPERATION"; break;
-        default:                               return "<unknown>"; break;
+const char *stringFromGlError(GLenum err) {
+    switch (err) {
+    case GL_INVALID_ENUM:
+        return "GL_INVALID_ENUM";
+        break;
+    case GL_INVALID_VALUE:
+        return "GL_INVALID_VALUE";
+        break;
+    case GL_INVALID_OPERATION:
+        return "GL_INVALID_OPERATION";
+        break;
+    case GL_OUT_OF_MEMORY:
+        return "GL_OUT_OF_MEMORY";
+        break;
+    case GL_INVALID_FRAMEBUFFER_OPERATION:
+        return "GL_INVALID_FRAMEBUFFER_OPERATION";
+        break;
+    default:
+        return "<unknown>";
+        break;
     }
 }
-

game/glclasses.hpp

@@ -16,6 +16,7 @@ template <GLenum T> class BufferObject {
   public:
     BufferObject();
     ~BufferObject();
+    void init();
     void bind();
     void bind(GLuint index, GLintptr offset = 0, GLsizeiptr size = 0);
     void fill(GLenum usage, GLsizei size = 0, GLvoid *data = NULL);
@@ -35,6 +36,7 @@ class VAO {
   public:
     VAO();
     ~VAO();
+    void init();
     void bind();
     void unbind();
     void fill(GLuint index, GLint size, GLenum type, GLboolean normalized,
@@ -57,20 +59,67 @@ class Shader {
     void bind();
     void unbind();
     void load(const std::string &data, GLenum shadertype);
-  void loadFile(const std::string& data, GLenum shadertype);
+    void loadFile(const std::string &data, GLenum shadertype);
     GLuint location(const std::string &name);
     GLuint program();
 };
+
+class Texture {
+  private:
+    GLuint m_name;
+
+  protected:
+  public:
+    Texture();
+    ~Texture();
+    void init();
+    void bind();
+    void unbind();
+    void fill(GLint level, GLint internalFormat, GLsizei width, GLsizei height,
+              GLint border, GLenum format, GLenum type, const GLvoid *data);
+    GLuint getName();
+};
+
+class Framebuffer {
+  private:
+    GLuint m_name;
+
+  protected:
+  public:
+    Framebuffer();
+    ~Framebuffer();
+    void init();
+    void bind();
+    void unbind();
+    void attachRenderbuffer(GLenum attachment, GLuint rbo);
+    void attachTexture(GLenum attachment, GLuint tex);
+};
+
+class Renderbuffer {
+  private:
+    GLuint m_name;
+
+  protected:
+  public:
+    Renderbuffer();
+    ~Renderbuffer();
+    void init();
+    void bind();
+    void unbind();
+    void create(GLenum internalformat, GLsizei width, GLsizei height);
+};
 }
 
 #define TBufferObject_(pre, post)                                              \
     template <GLenum T> pre endofthejedi::BufferObject<T>::post
 #define TBufferObject(...) TBufferObject_(__VA_ARGS__)
 
-TBufferObject(, BufferObject)() { glGenBuffers(1, &m_name); }
+TBufferObject(, BufferObject)() {}
 
 TBufferObject(, ~BufferObject)() { glDeleteBuffers(1, &m_name); }
 
+TBufferObject(void, init)() { glGenBuffers(1, &m_name); }
+
 TBufferObject(void, bind)() { glBindBuffer(T, m_name); }
 
 TBufferObject(void, bind)(GLuint index, GLintptr offset, GLsizeiptr size) {
@@ -94,7 +143,7 @@ TBufferObject(void, unmap)() {
     // todo
 }
 
-void discardLastGlError(bool print=false);
+void discardLastGlError(bool print = false);
 
 // return false if there's an error
 bool checkAndPrintGlError();
@@ -102,4 +151,3 @@ bool checkAndPrintGlError();
 void printGlError(GLenum err);
 
 const char *stringFromGlError(GLenum err);
-

game/main.cpp

@@ -10,6 +10,11 @@
 #include "network/server.hpp"
 #include "options.hpp"
 
+#include "sound/sound.hpp"
+#include "sound/sound_effects.hpp"
+
+#include "state/state_update_event.hpp"
+
 #include <sys/time.h>
 
 uint64_t optionsFlags;
@@ -19,6 +24,7 @@ using asio::ip::tcp;
 int main(int argc, char *argv[])
 {
     bool devMode = false;
+    bool soundEnabled = false;
     char port[]="3490";
 
     static struct option long_options[] =
@@ -33,6 +39,7 @@ int main(int argc, char *argv[])
 //        {"delete",  required_argument, 0, 'd'},
           {"autorun", required_argument, 0, 'a'},
           {"port",    required_argument, 0, 'p'},
+          {"sound",   no_argument,       0, 's'},
           {"fps",     no_argument,       0, 'f'},
           {"dev",     no_argument,       0, 'd'},
           {0, 0, 0, 0}
@@ -41,7 +48,7 @@ int main(int argc, char *argv[])
     int option_index = 0;
 
     while(1){
-        char c = getopt_long (argc, argv, "p:fad",
+        char c = getopt_long (argc, argv, "p:fads",
                        long_options, &option_index);
         if (c == -1)
             break;
@@ -51,6 +58,7 @@ int main(int argc, char *argv[])
             case 'f':
                 SET_FLAG(SHOW_FPS,true);
                 break;
+
             case 'd':
                 std::cout<<"enabling developer mode" << std::endl;
                 devMode = true;
@@ -60,6 +68,10 @@ int main(int argc, char *argv[])
                 strcpy(port,optarg);
                 break;
 
+            case 's':
+                soundEnabled = true;
+                break;
+
             case 'a':
                 SET_FLAG(TEST_AUTORUN, true);
                 break;
@@ -75,6 +87,13 @@ int main(int argc, char *argv[])
 
     srand(time(NULL));
 
+    sound::SoundEffects *sounds = nullptr;
+    if (soundEnabled) {
+        if (sound::initSound()) {
+            sounds = new sound::SoundEffects();
+        }
+    }
+
     Game game;
     game.state()->setDeveloperMode(devMode);
 
@@ -89,6 +108,23 @@ int main(int argc, char *argv[])
     while(window.running()){
         window.poll();
         io_service.poll();
+
+        //size_t numEvents = game.state()->currentStateUpdateEvents().size();
+        //if (numEvents != 0) {
+        //    std::cout<<"game state update events: " << numEvents << std::endl;
+        //    for (game::StateUpdateEvent *evt : game.state()->currentStateUpdateEvents()) {
+        //        std::cout<< evt->description() << std::endl;
+        //    }
+        //}
+
+        if (sounds != nullptr) {
+            // TODO: get time diff too
+            sounds->advance(1/50.0f, game.state()->currentStateUpdateEvents());
+            // TODO: use flag to now when to do this.
+            sound::deleteOldSounds();
+        }
+
+        game.state()->applyAndClearAllOldStateUpdates();
     }
 
     return 0;

game/network/session.cpp

@@ -3,11 +3,10 @@
 #include "session.hpp"
 #include "game.hpp"
 #include "state/commands.hpp"
+#include "util.hpp"
 
 #include <iostream>
 
-#include <sstream>
-
 void trim(std::string &str)
 {
     const std::string ws = " \t\r\n";
@@ -28,13 +27,10 @@ bool Session::parse(std::string s)
     // strip leading/trailing whitespace/newlines as they are always unintional
     trim(s);
 
-    std::istringstream iss(s);
-
     std::string token;
-    iss >> token;
+    std::string rest;
 
-    // skip token + next whitespace
-    std::string rest = s.substr(std::min(s.size(), token.size()+1));
+    util::splitIntoTokenAndRest(s, token, rest);
 
     //std::cout<<"[session] token='" << token << "' rest='" << rest << "'" << std::endl;
 

game/network/session.hpp

@@ -33,5 +33,5 @@ private:
     char m_rcv_data[max_length];
     game::State* m_state;
     bool m_started = false;
-    int m_pid;
+    size_t m_pid;
 };

game/opengl.cpp

@@ -99,8 +99,9 @@ namespace endofthejedi {
             m_width = attribs.width;
             m_height = attribs.height;
             resize();
+
         } else if (event.type == ClientMessage) {
-            if (event.xclient.data.l[0] == m_atomWmDeleteWindow) {
+            if (event.xclient.data.l[0] == (int) m_atomWmDeleteWindow) {
                 stop();
             }
         } else if (event.type == DestroyNotify) {

game/renderer.hpp

@@ -5,6 +5,8 @@
 #include <epoxy/gl.h>
 #include <epoxy/glx.h>
 
+#include <glm/gtc/matrix_transform.hpp>
+
 #include "game.hpp"
 
 namespace endofthejedi {
@@ -21,6 +23,9 @@ namespace endofthejedi {
         public:
             virtual void setup() { }
             virtual void render(const game::State *state) = 0;
+
+            virtual void setWindowSize(int px, int py) { (void) px; (void) py; }
+            virtual void setCameraMatrix(const glm::mat4 &cam) { (void) cam; }
     };
 
 }

game/renderer_polygon_3d/image_texture.cpp

@@ -0,0 +1,159 @@
+#include "image_texture.hpp"
+
+#include <png.h>
+#include <cmath>
+
+namespace endofthejedi {
+
+    bool ImageTexture::loadPng()
+    {
+        m_valid = false;
+
+        //header for testing if it is a png
+        png_byte header[8];
+
+        //open file as binary
+        FILE *fp = fopen(m_path.c_str(), "rb");
+        if (!fp) {
+            printf("[image_texture] warning: could not open png file to load: %s\n", m_path.c_str());
+            return false;
+        }
+
+        //read the header
+        fread(header, 1, 8, fp);
+
+        //test if png
+        int is_png = !png_sig_cmp(header, 0, 8);
+        if (!is_png) {
+            puts("warning: image loader: file is not PNG!");
+            fclose(fp);
+            return false;
+        }
+
+        //create png struct
+        png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+        if (!png_ptr) {
+            fclose(fp);
+            return false;
+        }
+
+        //create png info struct
+        png_infop info_ptr = png_create_info_struct(png_ptr);
+        if (!info_ptr) {
+            png_destroy_read_struct(&png_ptr, (png_infopp) NULL, (png_infopp) NULL);
+            fclose(fp);
+            return false;
+        }
+
+        //create png info struct
+        png_infop end_info = png_create_info_struct(png_ptr);
+        if (!end_info) {
+            png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
+            fclose(fp);
+            return false;
+        }
+
+        //png error stuff, not sure libpng man suggests this.
+        if (setjmp(png_jmpbuf(png_ptr))) {
+            png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+            fclose(fp);
+            return false;
+        }
+
+        //init png reading
+        png_init_io(png_ptr, fp);
+
+        //let libpng know you already read the first 8 bytes
+        png_set_sig_bytes(png_ptr, 8);
+
+        // read all the info up to the image data
+        png_read_info(png_ptr, info_ptr);
+
+        //variables to pass to get info
+        int bit_depth, color_type;
+        png_uint_32 twidth, theight;
+
+        // get info about png
+        png_get_IHDR(png_ptr, info_ptr, &twidth, &theight, &bit_depth, &color_type,
+                NULL, NULL, NULL);
+
+        //update width and height based on png info
+        m_size = glm::vec2(twidth, theight);
+
+        int pot_width  = (int) pow(2, ceilf(log2f(m_size.x)));
+        int pot_height = (int) pow(2, ceilf(log2f(m_size.y)));
+
+        m_uvScale = m_size / glm::vec2(pot_width, pot_height);
+
+        /*puts("#########################################");*/
+        /*printf("# PNG: width=%d, height=%d\n", width, height);*/
+        /*printf("# powers of two: w=%d, h=%d\n", pot_width, pot_height);*/
+        /*puts("#########################################");*/
+
+        // Update the png info struct.
+        png_read_update_info(png_ptr, info_ptr);
+
+        // Row size in bytes.
+        int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+        int pot_rowbytes = 4 * (int) pow(2, ceilf(log2f(rowbytes/4)));
+        /*printf("rowbytes: %d, pot_rowbytes=%d\n", rowbytes, pot_rowbytes);*/
+
+        // Allocate the image_data as a big block, to be given to opengl
+        png_byte *image_data = (png_byte *) calloc(pot_rowbytes * pot_height, sizeof(png_byte));
+        if (!image_data) {
+            //clean up memory and close stuff
+            png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+            fclose(fp);
+            return false;
+        }
+
+        //row_pointers is for pointing to image_data for reading the png with libpng
+        png_bytep *row_pointers = (png_bytep *) malloc(sizeof(png_bytep) * theight);
+        if (!row_pointers) {
+            //clean up memory and close stuff
+            png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+            free(image_data);
+            fclose(fp);
+            return false;
+        }
+
+        // set the individual row_pointers to point at the correct offsets of image_data
+        for (uint32_t i = 0; i < theight; ++i) {
+            row_pointers[theight- 1 - i] = image_data + i * pot_rowbytes;
+        }
+
+        //read the png into image_data through row_pointers
+        png_read_image(png_ptr, row_pointers);
+
+        //Now generate the OpenGL texture object
+        glGenTextures(1, &m_texture_id);
+        glBindTexture(GL_TEXTURE_2D, m_texture_id);
+        glTexImage2D(GL_TEXTURE_2D,
+                0,
+                GL_RGBA,
+                pot_width,
+                pot_height,
+                0,
+                GL_RGBA,
+                GL_UNSIGNED_BYTE,
+                (GLvoid*) image_data);
+
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+        // TODO: make selectable via switch!
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+
+        //clean up memory and close stuff
+        png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+        free(image_data);
+        free(row_pointers);
+        fclose(fp);
+
+        m_valid = true;
+
+        return true;
+    }
+}
+

game/renderer_polygon_3d/image_texture.hpp

@@ -0,0 +1,63 @@
+#pragma once
+
+#include "glclasses.hpp"
+
+#include <glm/vec2.hpp>
+
+// based on sources of knoc/chaqu
+
+namespace endofthejedi {
+
+    /**
+     * @brief This sprite struct stores all information needed to render an
+     * arbitrary PNG texture to a quad.
+     *
+     * If the loaded texture dimensions have no powers of a bit more space is
+     * allocated and extra padding is added.
+     */
+    class ImageTexture {
+        public:
+            ImageTexture(const std::string &filename) : m_path(filename), m_valid(false)
+            {
+            }
+
+            ~ImageTexture()
+            {
+            }
+
+            /**
+             * @brief Try to load a PNG image from file into an opengl texture.
+             *
+             * @param path Path of PNG file
+             * @param texture The used texture id will be saved there.
+             * @param width Width of the loaded texture in pixels.
+             * @param height Height of the loaded texture in pixels.
+             * @param uv_scale_x Horizontal portion of the screen which is padded to get
+             * power-of-two texture.
+             * @param uv_scale_y Vertical portion of the screen which is padded to get
+             * power-of-two texture.
+             *
+             * Note: The current active texture unit should be bound (GL_TEXTURE0 etc...)
+             * before calling this
+             *
+             * @return true if loading suceeded, false on errors.
+             */
+            bool loadPng();
+
+            bool valid() const { return m_valid; }
+
+            glm::vec2 size()    const { return m_size; }
+            glm::vec2 uvScale() const { return m_uvScale; }
+
+            GLuint textureId() const { return m_texture_id; }
+
+        public:
+            std::string m_path;     // path for the loaded texture is saved here
+            glm::vec2   m_size;     // used width/height of the pixels of the texture
+            glm::vec2   m_uvScale;  // factor to scale uv-coordinates to get rid of non-power-of-two padding
+
+            bool        m_valid;
+
+            GLuint      m_texture_id;         // texture binding id
+    };
+}

game/renderer_polygon_3d/particle_batch.cpp

@@ -4,7 +4,7 @@
 
 // TODO: use VAO's as soon as this is working
 
-int getDivisorForIndex(int index)
+int getDivisorForIndex(size_t index)
 {
     // 0 or 1?
     return (index == 0) ? 0 : 3;
@@ -15,52 +15,63 @@ namespace endofthejedi {
         : m_id(id)
         , m_numParticles(numParticles)
         , m_particleRadius(particleSize)
-        , m_halfAge(halfAge)
         , m_age(0.0)
+        , m_halfAge(halfAge)
+
+        // XXX this is used in some places in the shader.
+        // set it via uniform too
+        , m_maxNumHalfAges(5.0)
+
         , m_maxVelocity(1.0)
         , m_center(glm::vec3(0.0f, 0.0f, 0.0f))
 
-        // 2d quad drawn as a triangle fan
-        , m_data_quad({
-                1.0f, -1.0f,
-                1.0f,  1.0f,
-               -1.0f,  1.0f,
-               -1.0f, -1.0f})
+        // 2d quad drawn as a triangle fan.
+        //
+        // TODO
+        // it is transformed before uploading so it looks at the camera
+        , m_data_geometry({
+                0.5f, -0.5f,
+                0.5f,  0.5f,
+               -0.5f,  0.5f,
+               -0.5f, -0.5f})
     {
+        m_num_vertex_buffers = 4;
+
         //std::cout<<"[ParticleBatch] create for " << numParticles << " num particles" << std::endl;
+        m_attr_locations.resize(m_num_vertex_buffers);
+        m_data_vbos.resize(m_num_vertex_buffers);
 
         m_data_position.resize(m_numParticles);
         m_data_velocity.resize(m_numParticles);
-        m_data_kind.resize(m_numParticles);
-        m_data_max_age.resize(m_numParticles);
+        m_data_max_distance.resize(m_numParticles);
 
-        std::string vss_particles = "../data/shader/particle.vert";
-        std::string fss_particles = "../data/shader/particle.frag";
-
-        m_shader.init();
-        m_shader.loadFile(vss_particles, GL_VERTEX_SHADER);
-        m_shader.loadFile(fss_particles, GL_FRAGMENT_SHADER);
-
-        const char *names[] = {
-            "in_vertex",
-            "in_position",
-            "in_velocity",
-            "XXXunusedXXX",
-            "XXXunusedXXX"
-        };
-
-        for (int i=0; i<5; i++) {
-            const char *name = names[i];
-            GLint loc = glGetAttribLocation(m_shader.program(), name);
-            m_attr_locations[i] = loc;
-            //std::cout<<"attr location " << i << " " << loc << " " << name << std::endl;
+        for (size_t i=0; i<m_num_vertex_buffers; i++) {
+            m_attr_locations[i] = -1;
+            m_data_vbos[i]      =  0;
         }
     }
 
     ParticleBatch::~ParticleBatch()
     {
         // TODO: find out if stuff must be deallocated
-        glDeleteBuffers(5, m_data_vbos);
+        glDeleteBuffers(m_num_vertex_buffers, m_data_vbos.data());
+    }
+
+    void ParticleBatch::setup(Shader *shader)
+    {
+        static const char *names[] = {
+            "in_geometry",
+            "in_position",
+            "in_velocity",
+            "in_maxDist"
+        };
+
+        for (size_t i=0; i<m_num_vertex_buffers; i++) {
+            const char *name = names[i];
+            GLint loc = glGetAttribLocation(shader->program(), name);
+            m_attr_locations[i] = loc;
+            //std::cout<<"attr location for " << name << " (#"  << i << ") is " << loc << std::endl;
+        }
     }
 
     void ParticleBatch::setCenter(const glm::vec3 &center)
@@ -73,7 +84,7 @@ namespace endofthejedi {
         m_maxVelocity = maxVelocity;
     }
 
-    void ParticleBatch::setParticle(size_t index, const glm::vec3 &p, const glm::vec3 &v)
+    void ParticleBatch::setParticle(size_t index, const glm::vec3 &p, const glm::vec3 &v, float maxDist)
     {
         if (index >= m_numParticles) {
             return;
@@ -81,17 +92,16 @@ namespace endofthejedi {
 
         //std::cout<<"[ParticleBatch] setParticle " << index << std::endl;
 
-        m_data_position[index] = p;
-        m_data_velocity[index] = v;
-        m_data_kind[index]     = 0.0;
-        m_data_max_age[index]  = 0.0;
+        m_data_position[index]      = p;
+        m_data_velocity[index]      = v;
+        m_data_max_distance[index]  = maxDist;
     }
 
     void ParticleBatch::bind()
     {
         //std::cout<<"[ParticleBatch] bind" << std::endl;
 
-        for (size_t i=0; i<5; i++) {
+        for (size_t i=0; i<m_num_vertex_buffers; i++) {
             //std::cout<<"vbo #" << i << ": " << m_data_vbos[i] << std::endl;
             glEnableVertexAttribArray(m_attr_locations[i]);
             glBindBuffer(GL_ARRAY_BUFFER, m_data_vbos[i]);
@@ -113,9 +123,9 @@ namespace endofthejedi {
     {
         //std::cout<<"[ParticleBatch] upload to vbo's " << std::endl;
 
-        glGenBuffers(5, m_data_vbos);            // Generate buffer
+        glGenBuffers(m_num_vertex_buffers, m_data_vbos.data());            // Generate buffer
 
-        for (size_t i=0; i<5; i++) {
+        for (size_t i=0; i<m_num_vertex_buffers; i++) {
             size_t bufferDataSize = dataSizeForIndex(i) * m_numParticles * sizeof(float);
 
             glEnableVertexAttribArray(i);
@@ -130,16 +140,14 @@ namespace endofthejedi {
         }
     }
 
-    void ParticleBatch::render()
+    void ParticleBatch::render(Shader *shader)
     {
         //std::cout<<"[ParticleBatch] render " << std::endl;
-        m_shader.bind();
-
-        glUniform1f(m_shader.location("age"),         m_age);
-        glUniform1f(m_shader.location("maxVelocity"), m_maxVelocity);
-        glUniform1f(m_shader.location("halfAge"),     m_halfAge);
-        glUniform1f(m_shader.location("size"),        m_particleRadius);
-        glUniform3f(m_shader.location("explCenter"),  m_center.x, m_center.y, m_center.z);
+        glUniform1f(shader->location("age"),         m_age);
+        glUniform1f(shader->location("maxVelocity"), m_maxVelocity);
+        glUniform1f(shader->location("halfAge"),     m_halfAge);
+        glUniform1f(shader->location("size"),        m_particleRadius);
+        glUniform3f(shader->location("explCenter"),  m_center.x, m_center.y, m_center.z);
 
         bind();
 
@@ -154,7 +162,7 @@ namespace endofthejedi {
 #if 0
         glBegin(GL_QUADS);
         for (size_t index=0; index<m_numParticles; index++) {
-            for (int i=0; i<4; i++) {
+            for (size_t i=0; i<4; i++) {
                 glm::vec2 p = m_data_position[index] + triangles[i];
                 //glColor3f(1.0, 0.0, 0.0);
                 glVertex2f(p.x, p.y);
@@ -165,9 +173,9 @@ namespace endofthejedi {
 
     }
 
-    size_t ParticleBatch::dataSizeForIndex(int i)
+    size_t ParticleBatch::dataSizeForIndex(size_t index)
     {
-        switch(i) {
+        switch(index) {
             case 0:
                 return 2;
 
@@ -176,25 +184,23 @@ namespace endofthejedi {
                 return 3;
 
             case 3:
-            case 4:
                 return 1;
 
             default:
-                std::cerr << "bad" << std::endl;
+                std::cerr << "dataSizeForIndex() bad" << std::endl;
                 exit(-1);
         }
     }
 
-    void *ParticleBatch::dataSourceForIndex(int i)
+    void *ParticleBatch::dataSourceForIndex(size_t index)
     {
-        switch(i) {
-            case 0: return (void *) m_data_quad.data();
+        switch(index) {
+            case 0: return (void *) m_data_geometry.data();
             case 1: return (void *) m_data_position.data();
             case 2: return (void *) m_data_velocity.data();
-            case 3: return (void *) m_data_kind.data();
-            case 4: return (void *) m_data_max_age.data();
+            case 3: return (void *) m_data_max_distance.data();
             default:
-                std::cerr << "bad" << std::endl;
+                std::cerr << "dataSourceForIndex() bad" << std::endl;
                 exit(-1);
         }
     }
@@ -206,6 +212,6 @@ namespace endofthejedi {
 
     bool ParticleBatch::done() const
     {
-        return m_age >= 5.0*m_halfAge;
+        return m_age >= m_maxNumHalfAges*m_halfAge;
     }
 }

game/renderer_polygon_3d/particle_batch.hpp

@@ -8,6 +8,39 @@
 #include "glclasses.hpp"
 
 namespace endofthejedi {
+#if 0
+    class VertexAttribute {
+        public:
+            class Data {
+                public:
+                    enum class Type {
+                        Integer, Float, Float2, Float3, Float4, Matrix3, Matrix4
+                    };
+
+                    void setDataInteger(int index, int v)
+                    {
+                    }
+
+                    Data(Type type, int size) : m_type(type), m_size(size)
+                    {
+                        if (type ==
+                    }
+
+                private:
+                    int                m_size;
+                    Type               m_type;
+                    std::vector<int>   m_sourceInteger;
+                    std::vector<float> m_sourceFloat;
+            };
+
+        public:
+            Data        data;
+            std::string variableName;
+            int         divisor;
+            GLint       index;
+    };
+#endif
+
     class ParticleBatch {
         public:
             ParticleBatch(size_t id, size_t numParticles, float particleRadius, float halfAge);
@@ -15,47 +48,58 @@ namespace endofthejedi {
             // deallocate opengl stuff on destroy
             ~ParticleBatch();
 
-            size_t numParticles() const { return m_numParticles; }
+            // set particle data
+            void setParticle(size_t index, const glm::vec3 &p, const glm::vec3 &v, float maxDistance);
 
-            void setParticle(size_t index, const glm::vec3 &p, const glm::vec3 &v);
+            // stuff for setup/rendering usage
+            void setup(Shader *shader);
+            void bind();
+            void upload();
+            void render(Shader *shader);
 
+            // advance internal state (mostly age)
+            void tick(float dt);
+
+            // check if the lifetime is over and whether it can be deleted.
+            bool done() const;
+
+            // access attributes
+            size_t numParticles()  const { return m_numParticles; }
+            float  ageNormalized() const { return m_age / (m_maxNumHalfAges*m_halfAge); }
+            float  age()           const { return m_age; }
+            size_t id()            const { return m_id; }
+            const glm::vec3 &explosionCenter() const { return m_center; }
+
+            // set attributes
             void setCenter(const glm::vec3 &center);
             void setMaxVelocity(float maxVelocity);
 
-            void bind();
-            void upload();
-            void render();
-
-            void tick(float dt);
-            bool done() const;
-
-            Shader *shader() { return &m_shader; }
-
-            size_t id() const { return m_id; }
-
-        private:
-            size_t dataSizeForIndex(int i);
-            void  *dataSourceForIndex(int i);
+        private:
+            size_t dataSizeForIndex(size_t index);
+            void  *dataSourceForIndex(size_t index);
 
         private:
+            // id of explosion
             size_t                 m_id;
+
+            // uniforms for the shader
             size_t                 m_numParticles;
             float                  m_particleRadius;
-            const float            m_halfAge;
             float                  m_age;
+            const float            m_halfAge;
+            const float            m_maxNumHalfAges;
             float                  m_maxVelocity;
             glm::vec3              m_center;
 
-            GLuint                 m_data_vbos[5];
+            // meta data
+            size_t                 m_num_vertex_buffers;
+            std::vector<GLuint>    m_data_vbos;
+            std::vector<GLuint>    m_attr_locations;
 
-            std::vector<float>     m_data_quad;
+            // vertex attributes
+            std::vector<float>     m_data_geometry;
             std::vector<glm::vec3> m_data_position;
             std::vector<glm::vec3> m_data_velocity;
-            std::vector<float>     m_data_kind;
-            std::vector<float>     m_data_max_age;
-
-            GLuint                 m_attr_locations[5];
-
-            Shader                 m_shader;
+            std::vector<float>     m_data_max_distance;
     };
 }

game/renderer_polygon_3d/renderer_polygon_3d.cpp

@@ -2,10 +2,11 @@
 
 #include <iostream>
 
-#include <glm/gtc/type_ptr.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtx/euler_angles.hpp>
-#include <glm/gtc/random.hpp>
+#include "state/events/explosion_event.hpp"
+#include "state/events/missile_event.hpp"
+#include "state/events/ship_event.hpp"
+
+#include "developer_console.hpp"
 
 namespace endofthejedi {
     void RendererPolygon3d::setup()
@@ -14,23 +15,96 @@ namespace endofthejedi {
 
         std::cout<<"setup polygon 3d" << std::endl;
 
-        m_shader.init();
-
-#if 0
-        std::string vss_simple = "../data/shader/simple.vert";
-        std::string fss_simple = "../data/shader/simple.frag";
-        m_shader.loadFile(vss_simple, GL_VERTEX_SHADER);
-        m_shader.loadFile(fss_simple, GL_FRAGMENT_SHADER);
-#else
         std::string vss_game_objects = "../data/shader/gameobjects.vert";
         std::string fss_game_objects = "../data/shader/gameobjects.frag";
-        m_shader.loadFile(vss_game_objects, GL_VERTEX_SHADER);
-        m_shader.loadFile(fss_game_objects, GL_FRAGMENT_SHADER);
-#endif
 
-        addModel("../data/mesh/small_atomic_bomb.stl", &m_missileModel);
-        addModel("../data/mesh/planet_12.stl",         &m_planetModel);
-        addModel("../data/mesh/ship_ufo.stl",          &m_shipModel);
+        m_shader_game_objects.init();
+        m_shader_game_objects.loadFile(vss_game_objects, GL_VERTEX_SHADER);
+        m_shader_game_objects.loadFile(fss_game_objects, GL_FRAGMENT_SHADER);
+
+        std::string vss_particles = "../data/shader/particle.vert";
+        std::string fss_particles = "../data/shader/particle.frag";
+
+        m_shader_particles.init();
+        m_shader_particles.loadFile(vss_particles, GL_VERTEX_SHADER);
+        m_shader_particles.loadFile(fss_particles, GL_FRAGMENT_SHADER);
+
+        std::string vss_background = "../data/shader/background.vert";
+        std::string fss_background = "../data/shader/background.frag";
+
+        m_shader_background.init();
+        m_shader_background.loadFile(vss_background, GL_VERTEX_SHADER);
+        m_shader_background.loadFile(fss_background, GL_FRAGMENT_SHADER);
+
+        //addModel("../data/mesh/small_atomic_bomb.stl", &m_missileModel);
+        addModel("../data/mesh/rocket.stl",    &m_missileModel);
+        addModel("../data/mesh/planet_128.stl", &m_planetModel);
+        addModel("../data/mesh/ship_ufo.stl",  &m_shipModel);
+
+        m_texture = nullptr;
+        m_backgroundTexturePath = "../data/img/test.png";
+        loadBackgroundTexture();
+
+        developer::DeveloperConsole::instance().addCallback("reload_bg", [=](const std::string &)
+        {
+            loadBackgroundTexture();
+            return developer::resultOkay();
+        });
+
+        developer::DeveloperConsole::instance().addCallback("set_bg", [=](const std::string &str)
+        {
+            std::string token;
+            std::string rest;
+            util::splitIntoTokenAndRest(str, token, rest);
+
+            m_backgroundTexturePath = token;
+            loadBackgroundTexture();
+            return developer::resultOkay();
+        });
+    }
+
+    void RendererPolygon3d::loadBackgroundTexture()
+    {
+        //m_texture = new ImageTexture("../data/img/test.png");
+        if (m_texture != nullptr) {
+            delete(m_texture);
+        }
+
+                //"../data/img/stars_nebular.png");
+        m_texture = new ImageTexture(m_backgroundTexturePath);
+
+        glActiveTexture(GL_TEXTURE0);
+        m_texture->loadPng();
+
+        std::cout<<"texture loading: " << m_texture->valid() << std::endl;
+        if (!m_texture->valid()) {
+            std::cout<<"loading failed!";
+            return;
+            //exit(-1);
+        }
+
+        glm::vec2 s = m_texture->size();
+        std::cout<<"texture size is " << s.x << " X " << s.y << std::endl;
+    }
+
+    void RendererPolygon3d::renderBackgroundImage()
+    {
+        m_shader_background.bind();
+
+        glUniform2fv(m_shader_background.location("uvScale"), 1, glm::value_ptr(m_texture->uvScale()));
+
+        glActiveTexture(GL_TEXTURE0);
+        glEnable(GL_TEXTURE_2D);
+        glBindTexture(GL_TEXTURE_2D, m_texture->textureId());
+
+        //drawNdcQuad();
+        glColor3f(1.0, 0.0, 0.0);
+        glBegin(GL_QUADS);
+        glVertex2f(-1.0f, -1.0f);
+        glVertex2f(1.0f, -1.0f);
+        glVertex2f(1.0f, 1.0f);
+        glVertex2f(-1.0f, 1.0f);
+        glEnd();
     }
 
     void RendererPolygon3d::render(const game::State *state)
@@ -52,20 +126,28 @@ namespace endofthejedi {
         // TODO: add little rocks flying around
 
         glClearColor(0.0, 0.0, 0.0, 1.0);
-        //float s = 0.1;
-        //glClearColor(s, s, s, 1.0);
 
-        m_shader.bind();
+        renderBackgroundImage();
+
+        //float s = 0.1;
+        //glClearColor(s, s, 1.2*s, 1.0);
+
+        m_shader_game_objects.bind();
 
         // TODO: add ONE sun planet
         // TODO: add lights for explosions
 
-        configureLightningInShader();
+        configureLightningInShader(&m_shader_game_objects);
+
+        //std::cout<<"setting aspect ratio: " << m_aspectRatio << std::endl;
+        glUniform1f(m_shader_game_objects.location("aspectRatio"), m_aspectRatio);
 
         renderPlanets();
         renderShips();
         renderMissiles();
+
         renderParticles();
+
         renderTraces();
 
         //glColor3f(1.0, 0.0, 0.0);
@@ -81,17 +163,24 @@ namespace endofthejedi {
 
     void RendererPolygon3d::renderParticles()
     {
+        m_shader_particles.bind();
+
+        glUniform1f(m_shader_particles.location("aspectRatio"), m_aspectRatio);
+
         for (ParticleBatch *batch : m_particles) {
             batch->bind();
-            batch->render();
+            batch->render(&m_shader_particles);
         }
     }
 
-    void RendererPolygon3d::addExplosionEffect(size_t id, const glm::vec2 &pos, size_t n, float duration)
+    void RendererPolygon3d::addExplosionEffect(
+            size_t id, const glm::vec2 &explCenter, const glm::vec2 &missileVelocity,
+            bool isPlanetHit,
+            size_t n, float duration)
     {
         //float particleRadius = 0.005;
         //float particleRadius = 0.003;
-        float particleRadius = 0.005;
+        float particleRadius = 0.02;
 
         // TODO: use this as shader input too and make the area 2x around this
         // so that it stays hot/yellow for 2/3 of the time
@@ -99,7 +188,8 @@ namespace endofthejedi {
         float maxVelocity  = 0.4f;
 
         ParticleBatch *batch = new ParticleBatch(id, n, particleRadius, duration);
-        batch->setCenter(glm::vec3(pos, 0.0));
+        batch->setup(&m_shader_particles);
+        batch->setCenter(glm::vec3(explCenter, 0.0));
         batch->setMaxVelocity(maxVelocity);
 
         for (size_t i=0; i<n; i++) {
@@ -113,10 +203,123 @@ namespace endofthejedi {
             // especially in 3d this would look bad without 3d velocity vector.
             //glm::vec3 v = 0.5f*glm::vec3(sin(t), cos(t), util::randf_m1_1());
 
-            glm::vec3 v = glm::ballRand(maxVelocity);
-            v *= util::randf_0_1() * util::randf_0_1() * util::randf_0_1();
+            glm::vec3 pos = glm::vec3(explCenter, 0.0) + glm::ballRand(explCoreSize);
 
-            batch->setParticle(i, glm::vec3(pos, 0.0) + glm::ballRand(explCoreSize), v);
+            glm::vec3 v = glm::ballRand(maxVelocity);
+
+            // TODO: is that good?
+            if (isPlanetHit) {
+                v *= util::randf_0_1() * util::randf_0_1() * util::randf_0_1();
+            } else {
+                v *= util::randf_0_1();
+            }
+
+            // find collisions with planetns and limit max distance so particles
+            // won't fly through planets
+            //float maxDist = 0.1;
+            //float maxDist = 0.1*util::randf_0_1();
+            bool isInsidePlanet = false;
+            float maxParticleDist = INFINITY;
+
+            const game::Planet *nearestPlanet = nullptr;
+            for (const game::Planet *planet : m_state->planets) {
+                const glm::vec3 ppos3 = glm::vec3(planet->position, 0.0f);
+
+                // TODO: that's slightly wrong. use intersection for this.
+                float dist = glm::distance(ppos3, pos);
+                if (dist <= planet->radius) {
+                    isInsidePlanet = true;
+                    nearestPlanet = planet;
+                }
+                if (isInsidePlanet) {
+                    // skip searching for nearer planets once we are inside some
+                    // planet as the position/velocity will be changed to start
+                    // at the surface of the planet we were in with
+                    // reflected or planet-normal velocity.
+                    continue;
+                }
+                // TODO: if inside, move position so that it looks like
+                // reflecting the particle from the planet
+                bool fliesInPlanetDirection = glm::dot(v, ppos3-pos) > 0.0f;
+                if (dist < maxParticleDist && fliesInPlanetDirection) {
+                    nearestPlanet = planet;
+                    maxParticleDist = dist;
+                }
+            }
+
+            bool makeStationary = false;
+
+            if (isInsidePlanet && isPlanetHit) {
+                util::IntersectionTest intersect;
+                if (!intersect.raySphere(
+                    glm::vec3(explCenter, 0.0f), v,
+                    glm::vec3(nearestPlanet->position, 0.0f), nearestPlanet->radius))
+                {
+                    makeStationary = true;
+                    //std::cout<<"warning: intersection should be valid!" << std::endl;
+                    // TODO: must be as they lie on a plane and the dist is < as
+                    // the radius.
+                    // handle if this is wrong.
+
+                } else {
+                    // simple reflection, ignoring the missile velocity: this looks good enough
+                    (void) missileVelocity;
+                    glm::vec3 planetNormal = glm::normalize(pos - glm::vec3(nearestPlanet->position, 0.0f));
+                    v = glm::length(v) * planetNormal;
+
+                    // TODO
+                    // considering the missile velocity is not yet working:
+
+                    // set position to the intersection point between explosion
+                    // center and planet surface
+                    //pos = intersect.pointAtDistance(intersect.distance());
+                    //v = glm::vec3(missileVelocity, 0.0f);
+                    //v = v - 2.0f*glm::dot(v, planetNormal) * planetNormal;
+                    //v *= 4.0;
+                    //maxParticleDist = 100.0;
+                    //v = -v;
+
+                    //pos = glm::vec3(nearestPlanet->position, 0.0f) + nearestPlanet->radius*planetNormal;
+
+                    // set position to the intersection point between explosion
+                    // center and planet surface
+                    //const glm::vec3 planetNormal = glm::vec3(glm::normalize(explCenter - nearestPlanet->position), 0.0f);
+
+                    //pos = glm::vec3(nearestPlanet->position, 0.0f) + nearestPlanet->radius*planetNormal;
+
+                    // build new velocity by reflecting the old velocity on the
+                    // planet normal
+                    // TODO: add a bit random
+                    // TODO: add reflection
+                    // TODO: distribute particles around main reflection angle and
+                    // TODO: add material exhaust that is specific for the planet.
+                    // TODO: spawn waves on water planet
+                    // TODO: start fire on gas planet
+                    //v = glm::length(v) * planetNormal;
+                    //v = v - 2.0f*glm::dot(v, planetNormal) * planetNormal;
+                    //v = glm::length(v) * planetNormal;
+
+                    //glm::vec3 r  = v - 2.0f*glm::dot(v, planetNormal) * planetNormal;
+                    //glm::vec3 vn = glm::length(v) * planetNormal;
+                    //v = (r+vn) / 2.0f;
+
+                    //glm::vec3 vc = glm::vec3(nearestPlanet->position-explCenter, 0.0f);
+                    //glm::vec3 r  = vc - 2.0f*glm::dot(vc, planetNormal) * planetNormal;
+                    //v = r;
+                }
+            } else if (isInsidePlanet && !isPlanetHit) {
+                // if a planet is just hit by explosions particles but not the
+                // missile itself, don't reflect the particles in the planet.
+                // just set them as stationary at place of explosion
+                makeStationary = true;
+            }
+
+            if (makeStationary) {
+                v = glm::vec3(0.0f, 0.0f, 0.0f);
+                pos = glm::vec3(explCenter, 0.0f);;
+            }
+
+            batch->setParticle(i, pos, v, maxParticleDist);
         }
 
         batch->upload();
@@ -126,6 +329,7 @@ namespace endofthejedi {
 
     void RendererPolygon3d::advanceGraphicObjects(float dt)
     {
+#if 0
         for (const game::Explosion *expl : m_state->explosions) {
             bool gotIt = false;
             for (ParticleBatch *batch : m_particles) {
@@ -136,12 +340,61 @@ namespace endofthejedi {
             }
 
             if (!gotIt) {
-                addExplosionEffect(expl->id, expl->position, 1000, 1.0);
+                addExplosionEffect(
+                        expl->id, expl->position,
+                        expl->missileVelocity,
+                        (expl->hit == game::Hit::Planet),
+                        1000, 1.0);
+            }
+        }
+#endif
+
+        for (auto *evt : m_state->currentStateUpdateEvents()) {
+            auto type  = evt->eventType();
+            auto cycle = evt->lifeCycle();
+
+            if (type == game::EventType::Explosion) {
+                if (cycle == game::LifeCycle::Create) {
+                    game::ExplosionEvent *ee = static_cast<game::ExplosionEvent*>(evt);
+                    game::Explosion *expl    = static_cast<game::Explosion*>(ee->object());
+
+                    addExplosionEffect(
+                            expl->id, expl->position,
+                            expl->missileVelocity,
+                            (expl->hit == game::Hit::Planet),
+                            1000, 1.0);
+                }
+            } else if (type == game::EventType::Ship) {
+                game::ShipEvent *me = static_cast<game::ShipEvent*>(evt);
+                game::Ship *ship = static_cast<game::Ship*>(me->object());
+
+                // is always modificated
+                if (cycle == game::LifeCycle::Create) {
+                    //std::cout<<"[renderer] adding missile #" << missile->id << std::endl;
+                    m_ships.push_back(ship);
+
+                } else if (cycle == game::LifeCycle::Destroy) {
+                    //std::cout<<"[renderer] removing missile #" << missile->id << std::endl;
+                    m_ships.remove(ship);
+                }
+            } else if (type == game::EventType::Missile) {
+                game::MissileEvent *me = static_cast<game::MissileEvent*>(evt);
+                game::Missile *missile = static_cast<game::Missile*>(me->object());
+
+                // is always modificated
+                if (cycle == game::LifeCycle::Create) {
+                    //std::cout<<"[renderer] adding missile #" << missile->id << std::endl;
+                    m_missiles.push_back(missile);
+
+                } else if (cycle == game::LifeCycle::Destroy) {
+                    //std::cout<<"[renderer] removing missile #" << missile->id << std::endl;
+                    m_missiles.remove(missile);
+                }
             }
         }
 
         //if (m_particles.size() == 0) {
-        //    addExplosionEffect(0, glm::vec2(0.0, 0.0), 1000, 2.0);
+        //    addExplosionEffect(0, glm::vec2(0.0, 0.0), glm::vec2(0.0, 0.0), false, 10000, 2.0);
         //}
 
         std::vector<ParticleBatch*> rm;
@@ -167,12 +420,12 @@ namespace endofthejedi {
         // too (same for missiles)
         for (const game::Planet *planet : m_state->planets) {
             glm::mat4 model = computeModelMatrix(planet);
-            glUniformMatrix4fv(m_shader.location("model"), 1, GL_FALSE, glm::value_ptr(model));
+            glUniformMatrix4fv(m_shader_game_objects.location("model"), 1, GL_FALSE, glm::value_ptr(model));
 
             glm::vec3 c = planet->getColor();
-            glUniform3f(m_shader.location("materialColor"), c.x, c.y, c.z);
-            glUniform1i(m_shader.location("materialSeed"), planet->seed);
-            glUniform1i(m_shader.location("materialKind"), (int) planet->material);
+            glUniform3f(m_shader_game_objects.location("materialColor"), c.x, c.y, c.z);
+            glUniform1i(m_shader_game_objects.location("materialSeed"), planet->seed);
+            glUniform1i(m_shader_game_objects.location("materialKind"), (int) planet->material);
 
             m_planetModel->render();
         }
@@ -180,18 +433,20 @@ namespace endofthejedi {
 
     void RendererPolygon3d::renderMissiles()
     {
+        // TODO: add fire trail for missiles near the sun
+
         m_missileModel->bind();
 
-        for (const game::Player *player : m_state->players) {
-            for (const game::Missile *missile : player->missiles) {
-                glm::vec3 c = glm::vec3(1.0, 1.0, 0.3);
-                glUniform3f(m_shader.location("materialColor"), c.x, c.y, c.z);
+        for (const game::Missile *missile : m_missiles) {
+            glm::vec3 c = glm::vec3(1.0, 1.0, 0.3);
+            glUniform3f(m_shader_game_objects.location("materialColor"), c.x, c.y, c.z);
 
-                glm::mat4 model = computeModelMatrix(missile);
-                glUniformMatrix4fv(m_shader.location("model"), 1, GL_FALSE, glm::value_ptr(model));
+            // TODO: rename functions so their name represents what args they
+            // take
+            glm::mat4 model = computeModelMatrix(missile);
+            glUniformMatrix4fv(m_shader_game_objects.location("model"), 1, GL_FALSE, glm::value_ptr(model));
 
-                m_missileModel->render();
-            }
+            m_missileModel->render();
         }
     }
 
@@ -199,12 +454,12 @@ namespace endofthejedi {
     {
         m_shipModel->bind();
 
-        for (const game::Ship *ship : m_state->ships) {
+        for (const game::Ship *ship : m_ships) {
             glm::mat4 model = computeModelMatrix(ship);
-            glUniformMatrix4fv(m_shader.location("model"), 1, GL_FALSE, glm::value_ptr(model));
+            glUniformMatrix4fv(m_shader_game_objects.location("model"), 1, GL_FALSE, glm::value_ptr(model));
 
             glm::vec3 c = glm::vec3(0.1, 1.0, 0.2);
-            glUniform3f(m_shader.location("materialColor"), c.x, c.y, c.z);
+            glUniform3f(m_shader_game_objects.location("materialColor"), c.x, c.y, c.z);
 
             m_shipModel->render();
         }
@@ -220,7 +475,7 @@ namespace endofthejedi {
             exit(-1);
         }
 
-		(*dest)->setup(&m_shader);
+		(*dest)->setup(&m_shader_game_objects);
         (*dest)->uploadToOpenGl();
 
         m_models.push_back(*dest);
@@ -236,9 +491,17 @@ namespace endofthejedi {
         glm::vec2 vn = glm::normalize(missile->velocity);
         float a = std::atan2(vn.y, vn.x);
 
+        glm::mat4 mat = computeModelMatrix(missile->position, 0.1f, a);
+
         // TODO: which visual size has the rocket? in game its just a point with
         // no size because all others have size.
-        return computeModelMatrix(missile->position, 0.03f, a);
+        //for atomic bomb
+        //return computeModelMatrix(missile->position, 0.03f, a);
+
+        // flipped too
+        mat = glm::rotate(mat, (float) M_PI/2.0f, glm::vec3(0.0f, 1.0f, 0.0f));
+
+        return mat;
     }
 
     glm::mat4 RendererPolygon3d::computeModelMatrix(const game::Ship *ship)
@@ -293,7 +556,7 @@ namespace endofthejedi {
         glPolygonMode(GL_FRONT, GL_FILL);
     }
 
-    void RendererPolygon3d::configureLightningInShader()
+    void RendererPolygon3d::configureLightningInShader(Shader *shader) const
     {
         // TODO: add a few small lights for explosions so they lit the
         // surroundsings
@@ -310,7 +573,49 @@ namespace endofthejedi {
             }
         }
 
-        glUniform3f(m_shader.location("lightPosition"), p.x, p.y, p.z);
-        glUniform3f(m_shader.location("lightColor"),    c.x, c.y, c.z);
+        glUniform3f(shader->location("lightPosition"), p.x, p.y, p.z);
+        glUniform3f(shader->location("lightColor"),    c.x, c.y, c.z);
+
+        std::vector<glm::vec3> positions;
+        std::vector<float> intensities;
+
+        size_t numExplLights = 0;
+
+        for (ParticleBatch *batch : m_particles) {
+            float age = batch->ageNormalized();
+            // TODO: use function with a peak for this:
+            //
+            //   /\__
+            // _/    \--____
+
+            float intensity = 1.0-age;
+            glm::vec3 p = batch->explosionCenter();
+
+            intensities.push_back(intensity);
+            positions.push_back(p);
+
+            numExplLights++;
+
+            if (numExplLights == 10) {
+                break;
+            }
+        }
+
+        glUniform1i( shader->location("explLightsNum"), numExplLights);
+
+        if (numExplLights != 0) {
+            glUniform3fv(shader->location("explLightsPos"),         numExplLights, glm::value_ptr(positions[0]));
+            glUniform1fv(shader->location("explLightsIntensities"), numExplLights, intensities.data());
+        }
+    }
+
+    void RendererPolygon3d::setWindowSize(int px, int py)
+    {
+        m_aspectRatio = (float) px / (float) py;
+    }
+
+    void RendererPolygon3d::setCameraMatrix(const glm::mat4 &cam)
+    {
+        (void) cam;
     }
 }

game/renderer_polygon_3d/renderer_polygon_3d.hpp

@@ -2,6 +2,13 @@
 
 #include <list>
 
+#include <glm/gtc/type_ptr.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtx/euler_angles.hpp>
+#include <glm/gtc/random.hpp>
+#include <glm/vec3.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+
 #include "glclasses.hpp"
 
 #include "game.hpp"
@@ -16,9 +23,7 @@
 
 #include "particle_batch.hpp"
 #include "polygon_model.hpp"
-
-#include <glm/vec3.hpp>
-#include <glm/gtc/matrix_transform.hpp>
+#include "image_texture.hpp"
 
 namespace endofthejedi {
 
@@ -27,6 +32,9 @@ namespace endofthejedi {
             void setup();
             void render(const game::State *state) override;
 
+            void setWindowSize(int px, int py);
+            void setCameraMatrix(const glm::mat4 &cam);
+
         private:
             void renderPlanets();
             void renderMissiles();
@@ -35,7 +43,10 @@ namespace endofthejedi {
 
             void addModel(const std::string &filename, PolygonModel **dest);
 
-            void addExplosionEffect(size_t id, const glm::vec2 &pos, size_t n, float duration);
+            void addExplosionEffect(
+                    size_t id, const glm::vec2 &pos, const glm::vec2 &missileVelocity,
+                    bool hitPlanet,
+                    size_t n, float duration);
 
             void advanceGraphicObjects(float dt);
 
@@ -49,7 +60,11 @@ namespace endofthejedi {
 
             void renderTraces();
 
-            void configureLightningInShader();
+            void configureLightningInShader(Shader *shader) const;
+
+            void renderBackgroundImage();
+
+            void loadBackgroundTexture();
 
         private:
             // all models are also here (for easy reloading etc.)
@@ -61,7 +76,9 @@ namespace endofthejedi {
             PolygonModel               *m_shipModel;
 
             // for rendering everything
-            Shader m_shader;
+            Shader m_shader_background;
+            Shader m_shader_game_objects;
+            Shader m_shader_particles;
 
             // for accessing
             const game::State *m_state;
@@ -70,5 +87,14 @@ namespace endofthejedi {
 
             // time value for last rendering cycle (-1 after setup/startup)
             float m_lastTime;
+
+            float m_aspectRatio;
+
+            // TODO: put representation specialized for rendering in here
+            std::list<const game::Missile*> m_missiles;
+            std::list<const game::Ship*>    m_ships;
+
+            std::string m_backgroundTexturePath;
+            ImageTexture *m_texture;
     };
 }

game/sound/dummy_sound.cpp

@@ -0,0 +1,131 @@
+#include "sound.hpp"
+
+namespace sound {
+    bool initSound(void)
+    {
+        return false;
+    }
+
+    void deleteOldSounds()
+    {
+    }
+
+    SoundHandle *playSound(enum Sound type, float amplitude)
+    {
+        (void) type;
+        (void) amplitude;
+        return NULL;
+    }
+
+    SoundHandle *playFrequency(float freq, float amplitude)
+    {
+        (void) freq;
+        (void) amplitude;
+        return NULL;
+    }
+
+    bool configureEnvelope(SoundHandle *handle, float rise, float hold, float decay)
+    {
+        (void) handle;
+        (void) rise;
+        (void) hold;
+        (void) decay;
+        return false;
+    }
+
+    bool configureOvershoot(SoundHandle *handle, float relativeOvershootTime)
+    {
+        (void) handle;
+        (void) relativeOvershootTime;
+        return false;
+    }
+
+    bool configureEnvelopeWait(SoundHandle *handle, float rise, float hold, float decay, float wait)
+    {
+        (void) handle;
+        (void) rise;
+        (void) hold;
+        (void) decay;
+        (void) wait;
+        return false;
+    }
+
+    bool configureEnvelopeLooping(SoundHandle *handle, float rise, float hold, float decay, float wait)
+    {
+        (void) handle;
+        (void) rise;
+        (void) hold;
+        (void) decay;
+        (void) wait;
+        return false;
+    }
+
+    float getRiseDuration(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+    float getHoldDuration(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+
+    float getDecayDuration(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+
+    float getWaitTime(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+
+    void configureWaitTime(SoundHandle *handle, float waitTime)
+    {
+        (void) handle;
+        (void) waitTime;
+    }
+
+    void setLoopCount(SoundHandle *handle, int numRepetitions)
+    {
+        (void) handle;
+        (void) numRepetitions;
+    }
+
+    bool stopSound(SoundHandle *handle)
+    {
+        (void) handle;
+        return true;
+    }
+
+    void stopAllSounds(void)
+    {
+    }
+
+    void teardownSound(void)
+    {
+    }
+
+    bool startDumpingWav(const char *filename)
+    {
+        (void) filename;
+        return false;
+    }
+
+    void stopDumpingWav(void)
+    {
+    }
+
+    int numActiveSounds(void)
+    {
+        return 0;
+    }
+
+    void deleteSound(SoundHandle *handle)
+    {
+        (void) handle;
+    }
+}

game/sound/sound.hpp

@@ -0,0 +1,196 @@
+#ifndef _SOUND_HPP_
+#define _SOUND_HPP_
+
+#include <stdlib.h>
+#include <stdbool.h>
+
+namespace sound {
+
+    // type of sound.
+    // the envelope settings modify each sound.
+    enum Sound {
+        SoundFrequency=0,   // one frequency
+        SoundWhiteNoise=1,  // all frequencies are equal
+        SoundBrownianNoise=2,  // 1/f^2 noise
+        SoundPinkNoise=3,   // 1/f noise
+    };
+
+    enum EnvelopeState {
+        New=0,   // newly spawned
+        Wait,  // ready but not yet started (waiting before starting or before repeating)
+        Rise,  // increasing
+        BeginOvershoot,
+        EndOvershoot,
+        Hold,  // staying at normal level
+        Decay, // deacying
+        Done,  // done
+    };
+
+    enum SoundDecayType {
+        SoundDecayLinear = 0,
+        SoundDecayExp    = 1
+    };
+
+    struct SoundHandle {
+        // just for debugging/logging. don't rely on use
+        const char *name;
+
+        // unique ID for accessing them via lookups etc. if sound is dead, this will be never reused
+        size_t uid;
+
+        // marked for deletion by the internal thread.
+        bool deleteFlag;
+
+        // is now deleted. when a new sound should be used, this can be reused
+        // and at the end deleteFlag and isDeleted should be cleared.
+        bool isDeleted;
+
+        // if true, don't deallocate once this is done.
+        bool keep_when_done;
+
+        // these are public and can be changed by the user.
+        enum EnvelopeState envelope;
+
+        /****************************************************************/
+        /*             Special Parameters for specific types            */
+        /****************************************************************/
+
+        /******************** SoundFrequency ****************************/
+
+        float freq; // base frequency for type: SoundFrequency
+
+        /******************** White / Brownian / Pink Noise ****************/
+        float leakage; // influence of previous state on current value (0..1)
+        float scaling; // influence of white noise on next value
+
+        // If true and the value goes outside (-1..1), do the step in the other
+        // direction to stay inside the valid range.
+        bool skipDirectionIfClamping;
+
+        /******************** SoundFrequency: ***************************/
+
+        /****************************************************************/
+        /*             Common sound state / parameters                  */
+        /****************************************************************/
+        // progress of the sound which is used for the envelope but can be used for
+        // other things too
+        float time;
+
+        // scalar state that can be used arbitrarily to derive the waveform from it
+        float state;
+
+        // time when the sound is done
+        // if != 0.0, the sound changes with that
+        // TODO: make attack gain decay stuff as envelope
+        // TODO: add amplitude noise
+        float _riseTime;
+        float _relativeOvershootTime; // percentage of end of rise time that is used for overshoot (max amplitude at t_overshoot/2)
+        float _holdTime;
+        float _decayTime;
+        float _waitTime;
+
+        // waveform of type of rise. default: linear
+        enum SoundDecayType riseType;
+
+        // waveform of type of decay. default: linear
+        enum SoundDecayType decayType;
+
+        // if true, play infinitely
+        bool looping;
+
+        // base amplitude of the sound
+        float amplitude;
+
+        // amplitude when signal is at minimum (before rise, after release and in wait time)
+        float minAmplitude;
+
+        // these are al private!
+        // never acces them
+        enum Sound   _type; // which type of sound
+
+        int _loopCount;
+
+        // if true, will get removed
+        bool _done;
+        bool _useEnvelope;
+
+        float *history; // if != 0, history is a pointer to 2*numHistorySamples samples.
+        size_t numHistorySamples; // if != 0, save history for this sound.
+        size_t lastHistorySample; // index/2 of last history sample. used
+    };
+
+    // initialize sound subsystem. return true if working, false on errors.
+    bool initSound(void);
+
+    // free sounds that are not used anymore.
+    // must be called regularily by the application
+    void deleteOldSounds();
+
+    // start playing a sound.
+    // args:
+    // type - type of sound.
+    // amplitude : 0..1
+    // handle: if != NULL will point to the internal sound handle to change the
+    // manipulate playing of the sound.
+    // TODO: add sound from file to play too
+    SoundHandle *playSound(enum Sound type, float amplitude);
+
+    // start playing a looping frequency.
+    // args:
+    // freq: frequency in Hz
+    SoundHandle *playFrequency(float freq, float amplitude);
+
+    // set them.
+    // args:
+    // time of phases
+    bool configureEnvelope(SoundHandle *handle, float rise, float hold, float decay);
+
+    bool configureOvershoot(SoundHandle *handle, float relativeOvershootTime);
+
+    // same as above but set to looping and set wait time between intervals
+    bool configureEnvelopeWait(SoundHandle *handle, float rise, float hold, float decay, float wait);
+
+    // without looping but with wait
+    bool configureEnvelopeLooping(SoundHandle *handle, float rise, float hold, float decay, float wait);
+
+    // getter for attributes. if 0.0, unused.
+    float getRiseDuration(SoundHandle *handle);
+    float getHoldDuration(SoundHandle *handle);
+    float getDecayDuration(SoundHandle *handle);
+
+    float getWaitTime(SoundHandle *handle);
+    void configureWaitTime(SoundHandle *handle, float waitTime);
+
+    // Set looping behaviour of the sound.
+    // args:
+    //                 / >   0, sound is looping for this number of repetitions
+    // numRepetitions {  ==  0, sound is stopped when it is over
+    //                 \ == -1, loop the sound forever
+    //
+    void setLoopCount(SoundHandle *handle, int numRepetitions);
+
+    // stop playing a sound. the handle is invalid now.
+    bool stopSound(SoundHandle *handle);
+
+    // stop and remove all playing sounds. all handle become invalid after calling
+    // this.
+    void stopAllSounds(void);
+
+    void teardownSound(void);
+
+    // for debugging
+    bool startDumpingWav(const char *filename);
+
+    // is deletede when 'keep' not set after stopping
+    void stopDumpingWav(void);
+
+    int numActiveSounds(void);
+
+    void deleteSound(SoundHandle *handle);
+
+    //SoundHandle *playFreqEnvelope(float freq, float rise, float hold, float decay);
+
+    // TODO: add fade out/fade in overlay stuff for stopping sounds smoothly
+}
+
+#endif

game/sound/sound_effects.cpp

@@ -0,0 +1,83 @@
+#include "sound_effects.hpp"
+
+#include "sound.hpp"
+
+#include "util.hpp"
+
+namespace sound {
+    void SoundEffects::addSoundHandleForObject(game::Object *obj, SoundHandle *handle)
+    {
+        std::cout<<"add sound for object: " << obj->id << std::endl;
+        auto pair = std::pair<size_t, SoundHandle*>(obj->id, handle);
+        m_mapObjectToSoundHandle.insert(pair);
+    }
+
+
+    void SoundEffects::fadeOutSoundHandlesForObject(game::Object *obj, float fadeOutTime)
+    {
+        std::cout<<"deleting sounds for object: " << obj->id << std::endl;
+        std::multimap<size_t, SoundHandle*>::iterator it;
+        for (it = m_mapObjectToSoundHandle.find(obj->id); it != m_mapObjectToSoundHandle.end(); it++) {
+            std::cout<<"sound #" << it->second->uid << " / " << it->second->name << std::endl;
+            fadeOut(it->second, fadeOutTime);
+        }
+
+        size_t numRemoved = m_mapObjectToSoundHandle.erase(obj->id);
+        std::cout<<"removed total sounds: " << numRemoved << std::endl;
+    }
+
+    void SoundEffects::advance(float dt, const std::list<game::StateUpdateEvent*> &updates)
+    {
+        (void) dt;
+
+        for (const game::StateUpdateEvent *evt : updates) {
+            auto type  = evt->eventType();
+            auto cycle = evt->lifeCycle();
+            if (type == game::EventType::Missile) {
+                if (cycle == game::LifeCycle::Create) {
+                    SoundHandle *handle = playFrequency(880.0, 0.1);
+                    if (handle == nullptr) {
+                        continue;
+                    }
+                    fadeIn(handle);
+                    handle->name = "missile-fly-sound_fade-in";
+
+                    addSoundHandleForObject(evt->object(), handle);
+
+                } else if (cycle == game::LifeCycle::Destroy) {
+                    fadeOutSoundHandlesForObject(evt->object());
+                }
+            } else if (type == game::EventType::Explosion) {
+#if 1
+                if (cycle == game::LifeCycle::Create) {
+                    SoundHandle *handle = playSound(SoundBrownianNoise, 0.4);
+                    if (handle == nullptr) {
+                        continue;
+                    }
+                    configureEnvelope(handle, 0.2, 0.0, 2.0);
+
+                    // add big *boom* sound too
+                    handle = playFrequency(200.0, 0.5);
+                    if (handle == nullptr) {
+                        continue;
+                    }
+                    configureEnvelope(handle, 0.1, 0.0, 1.0);
+                }
+#endif
+            }
+        }
+    }
+
+    void SoundEffects::fadeIn(SoundHandle *handle, float fadeInTime)
+    {
+        // assume sound has just started
+        configureEnvelope(handle, fadeInTime, 1000000.0, 0.0);
+    }
+
+    void SoundEffects::fadeOut(SoundHandle *handle, float fadeOutTime)
+    {
+        // reset time so it imediately starts to fade out.
+        configureEnvelope(handle, 0.0, 0.0, fadeOutTime);
+        handle->time = 0.0;
+    }
+}

game/sound/sound_effects.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <list>
+#include <map>
+
+#include "state/state.hpp"
+
+namespace sound {
+    struct SoundHandle;
+
+#if 0
+    class SoundEffect {
+    public:
+        virtual ~SoundEffects()
+        {
+        }
+
+        // return false if it can be deleted
+        virtual bool advance(float dt) = 0;
+    };
+#endif
+
+    class SoundEffects {
+        public:
+            SoundEffects()
+            {
+            }
+
+            void advance(float dt, const std::list<game::StateUpdateEvent*> &updates);
+
+        private:
+            void fadeIn(SoundHandle *handle, float fadeInTime=0.3f);
+            void fadeOut(SoundHandle *handle, float fadeOutTime=0.3f);
+
+            void addSoundHandleForObject(game::Object *obj, SoundHandle *handle);
+            void fadeOutSoundHandlesForObject(game::Object *obj, float fadeOutTime=0.3f);
+
+        private:
+            std::list<SoundHandle*> m_soundHandles;
+            std::multimap<size_t, SoundHandle*> m_mapObjectToSoundHandle;
+            //std::list<SoundEffect*> m_effects;
+    };
+}

game/state/commands.cpp

@@ -5,6 +5,8 @@
 #include "trace.hpp"
 #include "util.hpp"
 
+#include "developer_console.hpp"
+
 namespace game {
     void ShootCommand::apply(Player *player, State *state) const
     {
@@ -14,25 +16,24 @@ namespace game {
 
         // angles are supplied in degrees and are CCW
         Missile *missile = new Missile(
+                state->generateId(),
                 player,
                 player->ship->position,
                 -util::deg2rad(m_angle),
                 0.005*player->speed);
 
-        Trace *trace = new Trace(missile);
-        missile->trace = trace;
-
         player->energy -= player->speed;
         player->missiles.push_back(missile);
 
-        state->addTrace(trace);
+        state->addMissile(missile);
     }
 
     bool ShootCommand::ready(const Player *player, const State *state) const
     {
         (void) state;
 
-        return player->alive && player->energy >= player->speed;
+        //return player->alive && player->energy >= player->speed;
+        return player->alive;
     }
 
     void ChangeNameCommand::apply(Player *player, State *state) const
@@ -78,6 +79,8 @@ namespace game {
 
     void DeveloperCommand::apply(Player *player, State *state) const
     {
+        (void) player;
+
         if (!state->developerMode()) {
             std::cout<<"ignoring dev command while not in developer mode: '"
                 << m_payload << "'" << std::endl;
@@ -90,14 +93,26 @@ namespace game {
 
         std::cout << "got developer command: '" << m_payload << "'" << std::endl;
 
-        if (m_payload == "reload shader") {
-            // TODO: really do that ;)
-        } else if (m_payload == "reload models") {
+        std::string nextToken;
+        std::string nextPayload;
+
+        if (util::splitIntoTokenAndRest(m_payload, nextToken, nextPayload)) {
+            developer::DeveloperConsole::CallbackResult result =
+                developer::DeveloperConsole::instance().dispatchInput(
+                    nextToken,
+                    nextPayload);
+
+            if (result.okay) {
+                std::cout<<"[commands] developer callback success: " << result.answer << std::endl;
+            } else {
+                std::cout<<"[commands] developer callback failure: " << result.answer << std::endl;
+            }
         }
     }
 
     void SetDeveloperModeCommand::apply(Player *player, State *state) const
     {
+        (void) player;
         // TODO: check if player is admin
 
         state->setDeveloperMode(m_enable);

game/state/events/explosion_event.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "state/explosion.hpp"
+#include "state/state_update_event.hpp"
+
+namespace game {
+    class ExplosionEvent : public StateUpdateEvent {
+    public:
+        ExplosionEvent(LifeCycle lifeCycle, Explosion *explosion)
+            : StateUpdateEvent(lifeCycle, EventType::Explosion, explosion)
+        {
+        }
+    };
+}

game/state/events/missile_event.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "state/missile.hpp"
+#include "state/state_update_event.hpp"
+
+namespace game {
+    class MissileEvent : public StateUpdateEvent {
+    public:
+        MissileEvent(LifeCycle lifeCycle, Missile *missile)
+            : StateUpdateEvent(lifeCycle, EventType::Missile, missile)
+        {
+        }
+    };
+}

game/state/events/ship_event.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "state/ship.hpp"
+#include "state/state_update_event.hpp"
+
+namespace game {
+    class ShipEvent : public StateUpdateEvent {
+    public:
+        ShipEvent(LifeCycle lifeCycle, Ship *ship)
+            : StateUpdateEvent(lifeCycle, EventType::Ship, ship)
+        {
+        }
+    };
+}

game/state/explosion.cpp

@@ -0,0 +1,16 @@
+#include "explosion.hpp"
+
+namespace game {
+    size_t s_id_counter = 0;
+
+    Explosion::Explosion(size_t id, const glm::vec2 &pos, const glm::vec2 &missileVelocity, Hit hit, float maxAge)
+        : Object(id, pos)
+        , hit(hit)
+        , missileVelocity(missileVelocity)
+        , age(0.0)
+        , maxAge(maxAge * (1.0 + 0.1*util::randf_0_1()))
+        , maxRadius(0.05)
+    {
+    }
+}
+

game/state/explosion.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <glm/vec2.hpp>
+#include "object.hpp"
 
 #include "util.hpp"
 
@@ -10,21 +10,12 @@ namespace game {
     /**
      * Explosion: just an effect which looks good.
      */
-    class Explosion {
+    class Explosion : public Object {
     public:
-        Explosion(const glm::vec2 &pos, Hit hit, float maxAge=1.0)
-            : hit(hit)
-            , position(pos)
-            , age(0.0)
-            , maxAge(maxAge * (1.0 + 0.1*util::randf_0_1()))
-            , maxRadius(0.05)
-        {
-            static size_t id_counter = 0;
-            id = id_counter++;
-        }
+        Explosion(size_t id, const glm::vec2 &pos, const glm::vec2 &missileVelocity, Hit hit, float maxAge=1.0);
 
         const Hit       hit;      // kind of the explosion depends on the hit type
-        const glm::vec2 position; // position where it starts
+        const glm::vec2 missileVelocity; // impact velocity of the missile
         float           age;      // age (in seconsd) of the explosion
 
         // age (in seconds) when the explosion is not visible
@@ -32,6 +23,6 @@ namespace game {
         const float     maxAge;
         const float     maxRadius; // current radius depends on time.
 
-        size_t          id;
+        //virtual void test() = 0;
     };
 }

game/state/missile.cpp

@@ -11,9 +11,9 @@
 #include <glm/gtx/norm.hpp>
 
 namespace game {
-    Missile::Missile(Player *player, const glm::vec2 &pos, float angle, float speed)
-        : player(player)
-        , position(pos)
+    Missile::Missile(size_t id, Player *player, const glm::vec2 &pos, float angle, float speed)
+        : Object(id, pos)
+        , player(player)
     {
         velocity = speed * glm::vec2(std::sin(angle), std::cos(angle));
 
@@ -37,7 +37,7 @@ namespace game {
                 if (dist <= other->ship->radius) {
                     // TODO: collect all hits and return the first one only
                     // TODO: find exact hit position!
-                    return Missile::Event(position, player->id, other->id);
+                    return Missile::Event(position, velocity, player->id, other->id);
                 }
             }
         }
@@ -49,7 +49,7 @@ namespace game {
             if (dist <= planet->radius) {
                 // TODO: collect all hits and return the first one only
                 // TODO: find exact hit position!
-                return Missile::Event(position, planet->id);
+                return Missile::Event(position, velocity, planet->id);
             }
 
             dist *= 20.0;
@@ -77,9 +77,9 @@ namespace game {
         // check if distance to center of the universe is getting too big
         float distToCenter = glm::length(position);
         if (distToCenter > state->maxMissileDistance()) {
-            return Missile::Event(position, Hit::BorderOfUniverse);
+            return Missile::Event(position, velocity, Hit::BorderOfUniverse);
         }
 
-        return Missile::Event(position);
+        return Missile::Event(position, velocity);
     }
 }

game/state/missile.hpp

@@ -1,7 +1,8 @@
 #pragma once
 
+#include "object.hpp"
+
 #include <glm/vec2.hpp>
-#include <glm/vec3.hpp>
 
 #include "missile_hit_type.hpp"
 
@@ -15,30 +16,31 @@ namespace game {
 
     // missile belongs to a player and optionally fills a trace behind it.
     // trace then belongs to the player.
-    class Missile {
+    class Missile : public Object {
     public:
 
         // missile advances to pos. if hit != Nothing, it hits something and
         // stops existing afterwards.
         class Event {
         public:
-            Event(const glm::vec2 &pos)
-                : Event(pos, Hit::Nothing)
+            Event(const glm::vec2 &pos, const glm::vec2 &missileVelocity)
+                : Event(pos, missileVelocity, Hit::Nothing)
             {
             }
 
-            Event(const glm::vec2 &pos, Hit hit)
-                : hit(hit), position(pos)
+            Event(const glm::vec2 &pos, const glm::vec2 &missileVelocity, Hit hit)
+                : hit(hit), position(pos), missileVelocity(missileVelocity)
             {
             }
 
-            Event(const glm::vec2 &pos, int planetId) : Event(pos, Hit::Planet)
+            Event(const glm::vec2 &pos, const glm::vec2 &missileVelocity, size_t planetId)
+                : Event(pos, missileVelocity, Hit::Planet)
             {
                 this->planetId = planetId;
             }
 
-            Event(const glm::vec2 &pos, int playerIdKiller, int playerIdVictim)
-                : Event(pos, Hit::Ship)
+            Event(const glm::vec2 &pos, const glm::vec2 &missileVelocity, size_t playerIdKiller, size_t playerIdVictim)
+                : Event(pos, missileVelocity, Hit::Ship)
             {
                   this->playerIdKiller = playerIdKiller;
                   this->playerIdVictim = playerIdVictim;
@@ -46,26 +48,26 @@ namespace game {
 
             Hit       hit;
             glm::vec2 position;
+            glm::vec2 missileVelocity;
 
             // if a player was hit, these are valid.
-            int playerIdKiller;
-            int playerIdVictim;
+            size_t playerIdKiller;
+            size_t playerIdVictim;
 
             // if a planet was hit, this is valid
-            int planetId;
+            size_t planetId;
         };
 
-        Missile(Player *player, const glm::vec2 &pos, float angle, float speed);
+        Missile(size_t id, Player *player, const glm::vec2 &pos, float angle, float speed);
         ~Missile();
 
         // try to advance. if something will be hit, return the first hit in
         // time.
         Missile::Event advance(const game::State *state, float dt);
 
-        Player   *player; // owner won't be hit by own missiles
-        glm::vec2 position;
-        glm::vec2 velocity;
-        Trace    *trace;
+        Player      *player; // owner won't be hit by own missiles
+        glm::vec2    velocity;
+        Trace       *trace;
     };
 }
 

game/state/object.hpp

@@ -3,13 +3,14 @@
 #include <glm/vec2.hpp>
 #include <glm/vec3.hpp>
 
-class Object {
-public:
-    Object(const glm::vec2 &pos, float r) : position(pos), radius(r)
-    {
-    }
-
-    const glm::vec2 position;
-    const float     radius;
-};
+namespace game {
+    class Object {
+    public:
+        Object(size_t id, const glm::vec2 &pos) : id(id), position(pos)
+        {
+        }
 
+        const size_t    id;
+        glm::vec2       position;
+    };
+}

game/state/planet.hpp

@@ -13,24 +13,18 @@ class Planet : public Object {
      */
     enum class Material { Rock=0, Metal=1, Sand=2, Gas=3, Ice=4, Water=5, Sun=6 };
 
-    Planet(const glm::vec2 &pos, int id, float r)
-        : Planet(pos, id, r, Material::Rock)
-    {
-    }
-
-    Planet(const glm::vec2 &pos, int id, float r, Material mat)
-        : Object(pos, r), id(id), material(mat), seed(rand())
+    Planet(size_t id, const glm::vec2 &pos, float r, Material mat=Material::Rock)
+        : Object(id, pos), material(mat), radius(r), seed(rand())
     {
     }
 
     glm::vec3 getColor() const;
 
-    int id;
-
     // for rendering and physics (can fly through sun and outer gas planets)
     Material material;
 
     // just for rendering variation
-    int seed;
+    float radius;
+    int   seed;
 };
 }

game/state/player.hpp

@@ -14,7 +14,7 @@ namespace game {
 
     class Player {
     public:
-        int        id;
+        size_t     id;
         bool       alive;
         float      speed;
         float      energy;
@@ -23,7 +23,7 @@ namespace game {
         std::string name;
         std::list<Missile*> missiles;
 
-        Player(int id) : id(id), alive(true), speed(1.0), energy(0.0), ship(nullptr), name("<unnamed>")
+        Player(size_t id) : id(id), alive(true), speed(1.0), energy(0.0), ship(nullptr), name("<unnamed>")
         {
         }
 

game/state/ship.hpp

@@ -5,8 +5,10 @@
 namespace game {
     class Ship : public Object {
     public:
-        Ship(const glm::vec2 &pos, float r) : Object(pos, r)
+        Ship(size_t id, const glm::vec2 &pos, float r) : Object(id, pos), radius(r)
         {
         }
+
+        float radius;
     };
 }

game/state/state.cpp

@@ -10,53 +10,88 @@
 #include "object.hpp"
 #include "missile.hpp"
 #include "player.hpp"
-#include "planet.hpp"
 #include "ship.hpp"
 #include "commands.hpp"
 #include "trace.hpp"
 #include "explosion.hpp"
 
+#include "events/explosion_event.hpp"
+#include "events/missile_event.hpp"
+#include "events/ship_event.hpp"
+
 #include "util.hpp"
 
 namespace game {
-    void State::init(int numPlanets, bool devMode)
+    void State::init(int numPlanets)
     {
-        m_nextId             = 0;
+        // clear
+        for (Planet *planet : planets) {
+            delete(planet);
+        }
+        planets.clear();
+
+        // TODO: clear shots etc. too
+
         m_time               = 0.0;
         m_shipRadius         = 0.02;
         m_maxMissileDistance = 2.0;
         m_playerRespawnTime  = 2.0;
         m_defaultEnergy      = 10.0;
         m_maxNumTraces       = 10;
-        m_developerMode      = devMode;
 
-        Planet::Material mat = Planet::Material::Rock;
+        setPlayingFieldCenter(0, 0);
 
-        for (int i=0; i<numPlanets; i++) {
-            switch(i) {
-                case 0:
-                    mat = Planet::Material::Sun;
-                    break;
+        // TODO: need aspect ratio or data!
+        //setPlayingFieldSize(1000, 300);
 
-                case 1:
-                case 2:
-                    mat = Planet::Material::Water;
-                    break;
+        setupPlanets(numPlanets);
+    }
 
-                case 3:
-                case 4:
-                    mat = Planet::Material::Sand;
-                    break;
+    bool State::findPlanetSpawnPosition(bool planetIsSun, float radius, glm::vec2 *pos)
+    {
+        (void) planetIsSun;
 
-                case 5:
-                    mat = Planet::Material::Metal;
-                    break;
+        bool tooNearToCenter         = true;
+        bool collidesWithOtherPlanet = true;
 
-                default:
-                    mat = Planet::Material::Rock;
+        const glm::vec2 spawnArea = 0.9f * (m_playingFieldSize/std::max(m_playingFieldSize.x, m_playingFieldSize.y));
+
+        // distribute but not in the center and not next to other planets
+        int tries = 0;
+        do {
+            *pos = spawnArea * util::randv2_m1_1();
+
+            collidesWithOtherPlanet = false;
+            tooNearToCenter = glm::length(*pos) < 0.1;
+
+            if (!tooNearToCenter) {
+                for (const Planet *other : planets) {
+                    float d = glm::distance(other->position, *pos);
+
+                    float extraDist = (other->material == Planet::Material::Sun)
+                        ? 4.0
+                        : 1.0;
+
+                    if (d < extraDist*other->radius + radius) {
+                        collidesWithOtherPlanet = true;
+                        break;
+                    }
+                }
+            }
+            if (tries++ > 1000) {
+                return false;
             }
 
-            glm::vec2 pos;
+        } while(collidesWithOtherPlanet || tooNearToCenter);
+
+        return true;
+    }
+
+    void State::setupPlanets(int numPlanets)
+    {
+        for (int i=0; i<numPlanets; i++) {
+            Planet::Material mat = materialForStandardPlanetDistribution(i);
+
             float radius = 0.03 + 0.07*util::randf_0_1();
             if (i == 0) {
                 // sun is bigger but not too big
@@ -67,35 +102,33 @@ namespace game {
 
             }
 
-            bool tooNearToCenter         = true;
-            bool collidesWithOtherPlanet = true;
+            glm::vec2 pos;
+            if (findPlanetSpawnPosition(mat == Planet::Material::Sun, radius, &pos)) {
+                planets.push_back(new Planet(i, pos, radius, mat));
+            }
+        }
+    }
 
-            // distribute but not in the center and not next to other planets
-            int tries = 0;
-            do {
-                pos = util::randv2_m1_1();
+    Planet::Material State::materialForStandardPlanetDistribution(int index)
+    {
+        // a few sun/water/sand/metall planents and the rest rocks
+        switch(index) {
+            case 0:
+                return Planet::Material::Sun;
 
-                collidesWithOtherPlanet = false;
-                tooNearToCenter = glm::length(pos) < 0.1;
+            case 1:
+            case 2:
+                return Planet::Material::Water;
 
-                if (!tooNearToCenter) {
-                    for (const Planet *other : planets) {
-                        float d = glm::distance(other->position, pos);
+            case 3:
+            case 4:
+                return Planet::Material::Sand;
 
-                        float extraDist = (other->material == Planet::Material::Sun)
-                            ? 4.0
-                            : 1.0;
+            case 5:
+                return Planet::Material::Metal;
 
-                        if (d < extraDist*other->radius + radius) {
-                            collidesWithOtherPlanet = true;
-                            break;
-                        }
-                    }
-                }
-
-            } while((collidesWithOtherPlanet || tooNearToCenter) && tries++ < 1000);
-
-            planets.push_back(new Planet(pos, i, radius, mat));
+            default:
+                return Planet::Material::Rock;
         }
     }
 
@@ -106,23 +139,25 @@ namespace game {
             return false;
         }
 
-        player->ship = new Ship(spawnPos, m_shipRadius);
-        ships.push_back(player->ship);
+        Ship *ship = new Ship(generateId(), spawnPos, m_shipRadius);
+        player->ship = ship;
+        ships.push_back(ship);
 
         player->energy = m_defaultEnergy;
 
+        addShip(ship);
+
         return true;
     }
 
-    int State::addPlayer()
+    size_t State::addPlayer()
     {
-        int playerId = m_nextId++;
-        Player *player = new Player(playerId);
+        Player *player = new Player(generateId());
         players.push_back(player);
-        return playerId;
+        return player->id;
     }
 
-    void State::quitPlayer(int playerId)
+    void State::quitPlayer(size_t playerId)
     {
 		std::cout << playerId << " quit" << std::endl;
 
@@ -136,12 +171,12 @@ namespace game {
 		}
     }
 
-    void State::clear(int playerId)
+    void State::clear(size_t playerId)
     {
 		std::cout << playerId << " clear" << std::endl;
     }
 
-    void State::setName(int playerId, std::string name)
+    void State::setName(size_t playerId, std::string name)
     {
         // discard if not unique
         for (const Player *other : players) {
@@ -154,7 +189,12 @@ namespace game {
         playerForId(playerId)->name = name;
     }
 
-    void State::setSpeed(int playerId, double speed)
+    void State::addShip(Ship *ship)
+    {
+        m_nextEvents.push_back(new ShipEvent(LifeCycle::Create, ship));
+    }
+
+    void State::setSpeed(size_t playerId, double speed)
     {
         playerForId(playerId)->speed = speed;
     }
@@ -235,10 +275,7 @@ namespace game {
 
             std::vector<Missile*> rm;
 			for (Missile *missile : player->missiles) {
-
-                //std::cout<<"missile: " << (long unsigned int) missile << std::endl;
                 const Missile::Event evt = missile->advance(this, dt);
-
                 const bool isHit = (evt.hit != Hit::Nothing);
 
                 if (missile->trace != nullptr) {
@@ -288,7 +325,8 @@ namespace game {
 
 			for (Missile *missile : rm) {
 				player->missiles.remove(missile);
-				delete(missile);
+
+                m_nextEvents.push_back(new MissileEvent(LifeCycle::Destroy, missile));
 			}
         }
     }
@@ -306,12 +344,17 @@ namespace game {
 
 		for (Explosion *explosion : rm) {
 			explosions.remove(explosion);
-			delete(explosion);
+
+            m_nextEvents.push_back(new ExplosionEvent(LifeCycle::Destroy, explosion));
+
+			//delete(explosion);
 		}
     }
 
     void State::advance(float dt)
     {
+        //std::cout<<"[state] (init) cycle: update events length is " << m_nextEvents.size() << std::endl;
+
         m_time += dt;
 
         advancePlayerShipSpawns(dt);
@@ -323,9 +366,23 @@ namespace game {
         advancePlayerCommands(dt);
 
         advancePlayerMissiles(dt);
+
+        //std::cout<<"[state] (before move) cycle: update events length is " << m_nextEvents.size() << std::endl;
+
+        // put collected events into that list.
+        //m_allEvents.push_back(std::move(m_nextEvents));
+        for (auto *evt : m_nextEvents) {
+            m_allEvents.push_back(evt);
+        }
+        m_nextEvents.clear();
+
+        //std::cout<<"[state] (after move) cycle: update events length is " << m_nextEvents.size() << std::endl;
+
+        // finally remove things.
+        //m_nextEvents.clear();
     }
 
-    Player *State::playerForId(int playerId)
+    Player *State::playerForId(size_t playerId)
     {
         for (Player *p : players) {
             if (p->id == playerId) {
@@ -370,7 +427,7 @@ namespace game {
         }
     }
 
-    void State::commandForPlayer(int playerId, game::Command *cmd)
+    void State::commandForPlayer(size_t playerId, game::Command *cmd)
     {
         Player *player = playerForId(playerId);
         if (player != nullptr) {
@@ -393,6 +450,16 @@ namespace game {
         traces.push_back(trace);
     }
 
+    void State::addMissile(Missile *missile)
+    {
+        Trace *trace = new Trace(missile);
+        missile->trace = trace;
+
+        addTrace(trace);
+
+        m_nextEvents.push_back(new MissileEvent(LifeCycle::Create, missile));
+    }
+
     void State::deleteTrace(Trace *trace)
     {
         if (trace->missile != nullptr) {
@@ -410,7 +477,13 @@ namespace game {
             return;
         }
 
-        explosions.push_back(new Explosion(evt->position, evt->hit));
+        Explosion *explosion = new Explosion(
+                generateId(), evt->position,
+                evt->missileVelocity, evt->hit);
+
+        explosions.push_back(explosion);
+
+        m_nextEvents.push_back(new ExplosionEvent(LifeCycle::Create, explosion));
     }
 
     void State::advanceTraceAges(float dt)
@@ -430,4 +503,60 @@ namespace game {
             deleteTrace(trace);
         }
     }
+
+    void State::setPlayingFieldCenter(int center_x, int center_y)
+    {
+        m_playingFieldCenter = glm::vec2((float) center_x, (float) center_y);
+    }
+
+    void State::setPlayingFieldSize(int width, int height)
+    {
+        m_playingFieldSize = glm::vec2(width, height);
+    }
+
+    size_t State::generateId()
+    {
+        return m_ids.makeNextId();
+    }
+
+    void State::applyAndClearAllOldStateUpdates()
+    {
+        for (auto *evt : m_allEvents) {
+            if (evt->lifeCycle() == LifeCycle::Destroy) {
+                switch(evt->eventType()) {
+                    case EventType::Explosion:
+                        {
+                            ExplosionEvent *ee = static_cast<ExplosionEvent*>(evt);
+                            //std::cout<<"got explosion delete event, finally deleting explosion #"
+                            //    << ee->object()->id << std::endl;
+
+                            delete(ee->object());
+                        }
+                    break;
+
+                    case EventType::Missile:
+                    {
+                            auto *me = static_cast<MissileEvent*>(evt);
+                            //std::cout<<"got missile delete event, finally deleting missile #"
+                            //    << me->object()->id << std::endl;
+
+                            delete(me->object());
+                    }
+                    break;
+
+                default:
+                    std::cout<<"warning: unhandled deletion event for: event type "
+                        << (int) evt->eventType() << std::endl;
+                }
+            }
+            delete(evt);
+        }
+
+        m_allEvents.clear();
+    }
+
+    const std::list<StateUpdateEvent*> &State::currentStateUpdateEvents() const
+    {
+        return m_allEvents;
+    }
 }

game/state/state.hpp

@@ -10,6 +10,9 @@
 #include <glm/vec2.hpp>
 
 #include "missile.hpp"
+#include "planet.hpp"
+
+#include "state_update_event.hpp"
 
 // TODO:
 // give points for equipment / better weapons / more energy when:
@@ -27,11 +30,30 @@ namespace game {
     // forward declarations
     class Command;
     class Player;
-    class Planet;
+
     class Ship;
     class Trace;
     class Explosion;
 
+    class IdGenerator {
+        public:
+            IdGenerator() : m_nextId(0)
+            {
+            }
+
+            size_t makeNextId()
+            {
+                return m_nextId++;
+                if (m_nextId == 0) {
+                    std::cerr << "note: id counter just wrapped to 0, "
+                        "funny things can happen now." << std::endl;
+                }
+            }
+
+        private:
+            size_t m_nextId;
+    };
+
     class State {
     public:
         /*************************************************************************/
@@ -40,7 +62,7 @@ namespace game {
 
         // called to setup the state (randomize planets, kill
         // traces/missiles/ships etc.)
-        void init(int numPlanets=15, bool devMode=false);
+        void init(int numPlanets=15);
 
         // main method to advance the simulation by the given timestamp in
         // seconds.
@@ -52,15 +74,15 @@ namespace game {
 
         // The upper layer (network/renderer) calling these three functions
         // should keep id's unique and give one (network) input an id.
-        int addPlayer();
-        void clear(int playerId);
-        void setName(int playerId, std::string name);
-        void setSpeed(int playerId, double speed);
-        void quitPlayer(int playerId);
-        void commandForPlayer(int playerId, Command *cmd);
+        size_t addPlayer();
+        void clear(size_t playerId);
+        void setName(size_t playerId, std::string name);
+        void setSpeed(size_t playerId, double speed);
+        void quitPlayer(size_t playerId);
+        void commandForPlayer(size_t playerId, Command *cmd);
 
         // lookup. return nullptr on invalid playerId
-        Player *playerForId(int playerId);
+        Player *playerForId(size_t playerId);
 
         /*************************************************************************/
         /* Mixed stuff */
@@ -71,9 +93,15 @@ namespace game {
         // each ship has the same radius
         float shipRadius()         const { return m_shipRadius; }
 
-        // add a trace to the list of traces.
+        // add a trace to the state
         void addTrace(Trace *trace);
 
+        // add a missile to the state
+        void addMissile(Missile *missile);
+
+        // add a ship to the state
+        void addShip(Ship *ship);
+
         // delete traces with this command
         void deleteTrace(Trace *trace); // using a pointer
 
@@ -91,10 +119,26 @@ namespace game {
             m_developerMode = on;
         }
 
+        // called when the rendering window changes
+        // TODO: give dpi as information too
+        void setPlayingFieldSize(int width, int height);
+        void setPlayingFieldCenter(int width, int height);
+
+        size_t generateId();
+
+        void applyAndClearAllOldStateUpdates();
+
+        // delete the items for events that are to be removed in proper way
+        // after the events were given to other parts of the application.
+        const std::list<StateUpdateEvent*> &currentStateUpdateEvents() const;
+
+
         /*************************************************************************/
         /* Rendering */
         /*************************************************************************/
 
+        // TODO: hide and replace by events
+
         // Game items which should be rendered are here:
         // (access missiles by iterating over player's missiles attribute)
         std::vector<Planet*>  planets;
@@ -111,12 +155,15 @@ namespace game {
         void playerKillsPlayer(Player *killer, Player *victim);
 
         void addExplosionFromHit(const Missile::Event *evt);
+        bool findPlanetSpawnPosition(bool planetIsSun, float radius, glm::vec2 *pos);
 
         void advanceTraceAges(float dt);
         void advanceExplosions(float dt);
         void advancePlayerShipSpawns(float dt);
         void advancePlayerCommands(float dt);
         void advancePlayerMissiles(float dt);
+        void setupPlanets(int numPlanets);
+        Planet::Material materialForStandardPlanetDistribution(int index);
 
         // try to spawn a ship for this player.
         // return true on success, false on failure to find a spot.
@@ -126,13 +173,19 @@ namespace game {
         // usefule for spanwing things
         bool findFreePositionWithRadius(float r, glm::vec2 &pos);
 
-        float m_maxMissileDistance;
-        float m_playerRespawnTime;
-        float m_shipRadius;
-        float m_defaultEnergy;
-        int   m_nextId;
-        int   m_maxNumTraces;
-        float m_time;
-        bool  m_developerMode;
+        float  m_maxMissileDistance;
+        float  m_playerRespawnTime;
+        float  m_shipRadius;
+        float  m_defaultEnergy;
+        int    m_maxNumTraces;
+        IdGenerator m_ids;
+        float  m_time;
+        bool   m_developerMode;
+
+        glm::vec2 m_playingFieldCenter;
+        glm::vec2 m_playingFieldSize;
+
+        std::list<StateUpdateEvent*> m_nextEvents;
+        std::list<StateUpdateEvent*> m_allEvents;
     };
-};
+}

game/state/state_update_event.hpp

@@ -0,0 +1,73 @@
+#pragma once
+
+#include <string>
+
+#include "object.hpp"
+
+// TODO: make life cycle object class.
+// objects from that class can be created and destroyed only through factory
+// methods which create updates too.
+
+namespace game {
+    enum class LifeCycle {
+        Create,  // something was created
+        Modify,  // something was modified (look at attributes)
+        Destroy  // something was destroyed
+    };
+
+    // add all possible classes here
+    // TODO:
+    // there can be different things in here, like:
+    enum class EventType {
+        Explosion,
+        Missile,
+        Ship
+    };
+
+    class StateUpdateEvent {
+    public:
+        StateUpdateEvent(LifeCycle cycle, EventType event, Object *object, bool changesContinuously=false)
+            : m_lifeCycle(cycle), m_eventType(event)
+            , m_object(object)
+            , m_changesContinuously(changesContinuously)
+        {
+        }
+
+        LifeCycle lifeCycle()           const { return m_lifeCycle; }
+        EventType eventType()           const { return m_eventType; }
+        bool      changesContinuously() const { return m_changesContinuously; }
+        Object*   object()              const { return m_object; }
+
+        void setChangesContinuously(bool enable) { m_changesContinuously = enable; }
+
+        //std::string description() const
+        //{
+        //    // TODO
+        //    return "StateUpdateEvent(" + lifeCycleToString(m_lifeCycle) + ", " + eventTypeToString(m_eventType) + ")";
+        //}
+
+        //static std::string lifeCycleToString(LifeCycle lifeCycle)
+        //{
+        //    switch(lifeCycle) {
+        //        case LifeCycle::Create:  return "create";
+        //        case LifeCycle::Modify:  return "modify";
+        //        case LifeCycle::Destroy: return "destroy";
+        //        default: return "<no name>";
+        //    }
+        //}
+
+        //static std::string eventTypeToString(EventType eventType)
+        //{
+        //    switch(eventType) {
+        //        case EventType::Explosion: return "explosion";
+        //        default: return "<no name>";
+        //    }
+        //}
+
+    private:
+        const LifeCycle m_lifeCycle;
+        const EventType m_eventType;
+        Object         *m_object;
+        bool            m_changesContinuously;
+    };
+}

game/util.cpp

@@ -3,6 +3,8 @@
 #include <cmath>
 #include <cstdlib>
 
+#include <sstream>
+
 namespace util {
     float randf_m1_1()
     {
@@ -33,4 +35,101 @@ namespace util {
     {
         return 180.0 * rad / M_PI;
     }
+
+    IntersectionTest::IntersectionTest() : m_valid(false), m_distance(INFINITY)
+    {
+    }
+
+    IntersectionTest::IntersectionTest(float d) : m_valid(true), m_distance(d)
+    {
+    }
+
+    float IntersectionTest::distance() const { assert(m_valid); return m_distance; }
+    bool  IntersectionTest::valid()    const { return m_valid; }
+
+    glm::vec3 IntersectionTest::pointAtDistance(float d)
+    {
+        assert(m_valid);
+        return m_rayPos + m_rayDir * d;
+    }
+
+    bool IntersectionTest::raySphere(
+            const glm::vec3 &rayPos,    const glm::vec3 &rayDir,
+            const glm::vec3 &spherePos, float sphereRadius)
+    {
+        m_valid = false;
+
+        (void) spherePos;
+        (void) sphereRadius;
+
+        // TODO: save if hit.
+        m_valid = true;
+        m_rayPos = rayPos;
+        m_rayDir = rayDir;
+        m_distance = 0.5;
+
+        // TODO: get code
+        return m_valid;
+
+#if 0
+        const glm::vec3 &o = ray.pos();
+        const glm::vec3 &l = ray.dir();
+        const glm::vec3 &c = m_pos;
+        const float     &r = m_radius;
+
+        const glm::vec3 omc = o-c;
+        const float     dot = glm::dot(l, omc);
+        const float     s   = dot*dot - util::dotSelf(omc) + r*r;
+
+        if (s < 0.001) {
+            return RayIntersection();
+        }
+
+        const float t = -dot;
+
+#if 0
+        // TODO: is that meant as t?
+        if (s == 0) {
+            // not interested in touch point
+            return RayIntersection();
+
+            //d1 = t;
+            //return RayTouchesOnePoint;
+        }
+#endif
+
+        const float sr = sqrt(s);
+
+        d1 = t - sr;
+        d2 = t + sr;
+
+        // if end intersection lies behind it, this is completely uninteresting for us
+        // 0.01 because to get rid of rounding/precision errors
+        if (d2 <= 0.01) {
+            return RayIntersection();
+        }
+
+        // if the start of the interval lies behind us, make it 0 because we just
+        // want to know whats before us.
+        // 0.01 because to get rid of rounding/precision errors
+        if (d1 < 0.0) {
+            d1 = 0.0;
+        }
+#endif
+    }
+
+    bool splitIntoTokenAndRest(const std::string &str, std::string &token, std::string &rest)
+    {
+        std::istringstream iss(str);
+        iss >> token;
+
+        if (token.size() == 0) {
+            return false;
+        }
+
+        // skip token + next whitespace
+        rest = str.substr(std::min(str.size(), token.size()+1));
+
+        return true;
+    }
 }

game/util.hpp

@@ -1,6 +1,9 @@
 #pragma once
 
+#include <string>
+
 #include <glm/vec2.hpp>
+#include <glm/vec3.hpp>
 
 namespace util {
 
@@ -12,4 +15,40 @@ namespace util {
 
     float deg2rad(float deg);
     float rad2deg(float rad);
+
+    // split on whitespace into first token and the rest.
+    // return true if whitespace was found or just the token.
+    bool splitIntoTokenAndRest(const std::string &str, std::string &token, std::string &rest);
+
+    /**
+     * Test for intersection in positive direction of a ray.
+     * TODO: support inside?
+     */
+    class IntersectionTest {
+    public:
+        IntersectionTest();
+
+        // creates a valid intersection point at distance d
+        IntersectionTest(float d);
+
+        // intersection distance
+        float distance() const;
+
+        glm::vec3 pointAtDistance(float d);
+
+        // returns true if there's an interseciton.
+        bool valid()    const;
+
+        // return true if there's an intersection. then intersectionPoint is filled
+        // with details.
+        bool raySphere(
+                const glm::vec3 &rayPos,    const glm::vec3 &rayDir,
+                const glm::vec3 &spherePos, float sphereRadius);
+
+    private:
+        bool      m_valid;
+        float     m_distance;
+        glm::vec3 m_rayPos;
+        glm::vec3 m_rayDir;
+    };
 }

test/100players..py

@@ -1,9 +0,0 @@
-#!/usr/bin/env python3
-import os
-import random
-
-for i in range(100):
-    a = random.randint(0, 360)
-    print("spawn #%d +shoot %d" % (i, a))
-    os.system("echo %d | ncat  192.168.0.191 3490" % a)
-

test/shoot_n_times.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+import os
+import random
+import time
+import socket
+import sys
+
+delay = 0.1
+
+if len(sys.argv) <= 1:
+    print("usage: ./prog $NUM_SHOOTS [$FLOAT_DELAY_BETWEEN_SHOTS]")
+    exit(1)
+
+if len(sys.argv) > 2:
+    delay = float(sys.argv[2])
+
+s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+s.connect(("192.168.0.191", 3490))
+
+for i in range(int(sys.argv[1])):
+    a = random.randint(0, 360)
+    msg = str(a) + " \r\n"
+    s.send(msg.encode())
+    time.sleep(delay)
+