improving aspect ratio and window resize/scaling. done for game objects.

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 +4,6 @@ varying vec3  velocity;
 varying float decay;
 
 varying float explCenterDist;
-uniform vec3  explCenter;
 
 vec3 hsv2rgb(vec3 c)
 {

data/shader/particle.vert

@@ -14,6 +14,8 @@ varying vec3  velocity;
 varying vec2  vertex;
 varying float explCenterDist;
 
+uniform float aspectRatio;
+
 // TODO: rotate to face the user!
 void main()
 {
@@ -38,5 +40,5 @@ void main()
   vertex   = base.xy;
   velocity = in_velocity;
 
-  explCenterDist = length(explCenter-offset);
+  explCenterDist = length(explCenter - offset);
 }

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/opengl.cpp

@@ -99,6 +99,7 @@ namespace endofthejedi {
             m_width = attribs.width;
             m_height = attribs.height;
             resize();
+
         } else if (event.type == ClientMessage) {
             if (event.xclient.data.l[0] == m_atomWmDeleteWindow) {
                 stop();

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/particle_batch.cpp

@@ -33,14 +33,16 @@ namespace endofthejedi {
         m_data_velocity.resize(m_numParticles);
         m_data_kind.resize(m_numParticles);
         m_data_max_age.resize(m_numParticles);
+    }
 
-        std::string vss_particles = "../data/shader/particle.vert";
+    ParticleBatch::~ParticleBatch()
-        std::string fss_particles = "../data/shader/particle.frag";
+    {
-
+        // TODO: find out if stuff must be deallocated
-        m_shader.init();
+        glDeleteBuffers(5, m_data_vbos);
-        m_shader.loadFile(vss_particles, GL_VERTEX_SHADER);
+    }
-        m_shader.loadFile(fss_particles, GL_FRAGMENT_SHADER);
 
+    void ParticleBatch::setup(Shader *shader)
+    {
         const char *names[] = {
             "in_vertex",
             "in_position",
@@ -51,18 +53,12 @@ namespace endofthejedi {
 
         for (int i=0; i<5; i++) {
             const char *name = names[i];
-            GLint loc = glGetAttribLocation(m_shader.program(), name);
+            GLint loc = glGetAttribLocation(shader->program(), name);
             m_attr_locations[i] = loc;
             //std::cout<<"attr location " << i << " " << loc << " " << name << std::endl;
         }
     }
 
-    ParticleBatch::~ParticleBatch()
-    {
-        // TODO: find out if stuff must be deallocated
-        glDeleteBuffers(5, m_data_vbos);
-    }
-
     void ParticleBatch::setCenter(const glm::vec3 &center)
     {
         m_center = center;
@@ -130,16 +126,14 @@ namespace endofthejedi {
         }
     }
 
-    void ParticleBatch::render()
+    void ParticleBatch::render(Shader *shader)
     {
         //std::cout<<"[ParticleBatch] render " << std::endl;
-        m_shader.bind();
+        glUniform1f(shader->location("age"),         m_age);
-
+        glUniform1f(shader->location("maxVelocity"), m_maxVelocity);
-        glUniform1f(m_shader.location("age"),         m_age);
+        glUniform1f(shader->location("halfAge"),     m_halfAge);
-        glUniform1f(m_shader.location("maxVelocity"), m_maxVelocity);
+        glUniform1f(shader->location("size"),        m_particleRadius);
-        glUniform1f(m_shader.location("halfAge"),     m_halfAge);
+        glUniform3f(shader->location("explCenter"),  m_center.x, m_center.y, m_center.z);
-        glUniform1f(m_shader.location("size"),        m_particleRadius);
-        glUniform3f(m_shader.location("explCenter"),  m_center.x, m_center.y, m_center.z);
 
         bind();
 

game/renderer_polygon_3d/particle_batch.hpp

@@ -22,15 +22,14 @@ namespace endofthejedi {
             void setCenter(const glm::vec3 &center);
             void setMaxVelocity(float maxVelocity);
 
+            void setup(Shader *shader);
             void bind();
             void upload();
-            void render();
+            void render(Shader *shader);
 
             void tick(float dt);
             bool done() const;
 
-            Shader *shader() { return &m_shader; }
-
             size_t id() const { return m_id; }
 
         private:
@@ -55,7 +54,5 @@ namespace endofthejedi {
             std::vector<float>     m_data_max_age;
 
             GLuint                 m_attr_locations[5];
-
-            Shader                 m_shader;
     };
 }

game/renderer_polygon_3d/renderer_polygon_3d.cpp

@@ -2,11 +2,6 @@
 
 #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>
-
 namespace endofthejedi {
     void RendererPolygon3d::setup()
     {
@@ -14,19 +9,21 @@ 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);
+        m_shader_game_objects.init();
-#endif
+        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);
+
 
         //addModel("../data/mesh/small_atomic_bomb.stl", &m_missileModel);
         addModel("../data/mesh/rocket.stl",    &m_missileModel);
@@ -56,17 +53,22 @@ namespace endofthejedi {
         //float s = 0.1;
         //glClearColor(s, s, s, 1.0);
 
-        m_shader.bind();
+        m_shader_game_objects.bind();
 
         // TODO: add ONE sun planet
         // TODO: add lights for explosions
 
         configureLightningInShader();
 
+        //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);
@@ -82,9 +84,13 @@ 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);
         }
     }
 
@@ -100,6 +106,7 @@ namespace endofthejedi {
         float maxVelocity  = 0.4f;
 
         ParticleBatch *batch = new ParticleBatch(id, n, particleRadius, duration);
+        batch->setup(&m_shader_particles);
         batch->setCenter(glm::vec3(pos, 0.0));
         batch->setMaxVelocity(maxVelocity);
 
@@ -168,12 +175,12 @@ 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);
+            glUniform3f(m_shader_game_objects.location("materialColor"), c.x, c.y, c.z);
-            glUniform1i(m_shader.location("materialSeed"), planet->seed);
+            glUniform1i(m_shader_game_objects.location("materialSeed"), planet->seed);
-            glUniform1i(m_shader.location("materialKind"), (int) planet->material);
+            glUniform1i(m_shader_game_objects.location("materialKind"), (int) planet->material);
 
             m_planetModel->render();
         }
@@ -186,10 +193,10 @@ namespace endofthejedi {
         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);
+                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));
+                glUniformMatrix4fv(m_shader_game_objects.location("model"), 1, GL_FALSE, glm::value_ptr(model));
 
                 m_missileModel->render();
             }
@@ -202,10 +209,10 @@ namespace endofthejedi {
 
         for (const game::Ship *ship : m_state->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();
         }
@@ -221,7 +228,7 @@ namespace endofthejedi {
             exit(-1);
         }
 
-		(*dest)->setup(&m_shader);
+		(*dest)->setup(&m_shader_game_objects);
         (*dest)->uploadToOpenGl();
 
         m_models.push_back(*dest);
@@ -319,7 +326,17 @@ namespace endofthejedi {
             }
         }
 
-        glUniform3f(m_shader.location("lightPosition"), p.x, p.y, p.z);
+        glUniform3f(m_shader_game_objects.location("lightPosition"), p.x, p.y, p.z);
-        glUniform3f(m_shader.location("lightColor"),    c.x, c.y, c.z);
+        glUniform3f(m_shader_game_objects.location("lightColor"),    c.x, c.y, c.z);
+    }
+
+    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"
@@ -17,9 +24,6 @@
 #include "particle_batch.hpp"
 #include "polygon_model.hpp"
 
-#include <glm/vec3.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-
 namespace endofthejedi {
 
     class RendererPolygon3d : public Renderer {
@@ -27,6 +31,9 @@ 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();
@@ -61,7 +68,8 @@ namespace endofthejedi {
             PolygonModel               *m_shipModel;
 
             // for rendering everything
-            Shader m_shader;
+            Shader m_shader_game_objects;
+            Shader m_shader_particles;
 
             // for accessing
             const game::State *m_state;
@@ -70,5 +78,7 @@ namespace endofthejedi {
 
             // time value for last rendering cycle (-1 after setup/startup)
             float m_lastTime;
+
+            float m_aspectRatio;
     };
 }

game/state/state.cpp

@@ -10,7 +10,6 @@
 #include "object.hpp"
 #include "missile.hpp"
 #include "player.hpp"
-#include "planet.hpp"
 #include "ship.hpp"
 #include "commands.hpp"
 #include "trace.hpp"
@@ -21,6 +20,14 @@
 namespace game {
     void State::init(int numPlanets, bool devMode)
     {
+        for (Planet *planet : planets) {
+            delete(planet);
+        }
+        planets.clear();
+
+        //for (Player *player : players) {
+        //}
+
         m_nextId             = 0;
         m_time               = 0.0;
         m_shipRadius         = 0.02;
@@ -30,33 +37,59 @@ namespace game {
         m_maxNumTraces       = 10;
         m_developerMode      = devMode;
 
-        Planet::Material mat = Planet::Material::Rock;
+        setPlayingFieldCenter(0, 0);
 
-        for (int i=0; i<numPlanets; i++) {
+        // TODO: need aspect ratio or data!
-            switch(i) {
+        //setPlayingFieldSize(1000, 300);
-                case 0:
-                    mat = Planet::Material::Sun;
-                    break;
 
-                case 1:
+        setupPlanets(numPlanets);
-                case 2:
+    }
-                    mat = Planet::Material::Water;
-                    break;
 
-                case 3:
+    bool State::findPlanetSpawnPosition(bool planetIsSun, float radius, glm::vec2 *pos)
-                case 4:
+    {
-                    mat = Planet::Material::Sand;
+        (void) planetIsSun;
-                    break;
 
-                case 5:
+        bool tooNearToCenter         = true;
-                    mat = Planet::Material::Metal;
+        bool collidesWithOtherPlanet = true;
-                    break;
 
-                default:
+        const glm::vec2 spawnArea = 0.9f * (m_playingFieldSize/std::max(m_playingFieldSize.x, m_playingFieldSize.y));
-                    mat = Planet::Material::Rock;
+
+        // 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 +100,33 @@ namespace game {
 
             }
 
-            bool tooNearToCenter         = true;
+            glm::vec2 pos;
-            bool collidesWithOtherPlanet = true;
+            if (findPlanetSpawnPosition(mat == Planet::Material::Sun, radius, &pos)) {
+                planets.push_back(new Planet(pos, i, radius, mat));
+            }
+        }
+    }
 
-            // distribute but not in the center and not next to other planets
+    Planet::Material State::materialForStandardPlanetDistribution(int index)
-            int tries = 0;
+    {
-            do {
+        // a few sun/water/sand/metall planents and the rest rocks
-                pos = util::randv2_m1_1();
+        switch(index) {
+            case 0:
+                return Planet::Material::Sun;
 
-                collidesWithOtherPlanet = false;
+            case 1:
-                tooNearToCenter = glm::length(pos) < 0.1;
+            case 2:
+                return Planet::Material::Water;
 
-                if (!tooNearToCenter) {
+            case 3:
-                    for (const Planet *other : planets) {
+            case 4:
-                        float d = glm::distance(other->position, pos);
+                return Planet::Material::Sand;
 
-                        float extraDist = (other->material == Planet::Material::Sun)
+            case 5:
-                            ? 4.0
+                return Planet::Material::Metal;
-                            : 1.0;
 
-                        if (d < extraDist*other->radius + radius) {
+            default:
-                            collidesWithOtherPlanet = true;
+                return Planet::Material::Rock;
-                            break;
-                        }
-                    }
-                }
-
-            } while((collidesWithOtherPlanet || tooNearToCenter) && tries++ < 1000);
-
-            planets.push_back(new Planet(pos, i, radius, mat));
         }
     }
 
@@ -430,4 +461,14 @@ 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);
+    }
 }

game/state/state.hpp

@@ -10,6 +10,7 @@
 #include <glm/vec2.hpp>
 
 #include "missile.hpp"
+#include "planet.hpp"
 
 // TODO:
 // give points for equipment / better weapons / more energy when:
@@ -27,7 +28,7 @@ namespace game {
     // forward declarations
     class Command;
     class Player;
-    class Planet;
+
     class Ship;
     class Trace;
     class Explosion;
@@ -91,6 +92,11 @@ 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);
+
         /*************************************************************************/
         /* Rendering */
         /*************************************************************************/
@@ -111,12 +117,15 @@ 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.
@@ -134,5 +143,8 @@ namespace game {
         int   m_maxNumTraces;
         float m_time;
         bool  m_developerMode;
+
+        glm::vec2 m_playingFieldCenter;
+        glm::vec2 m_playingFieldSize;
     };
 };