one planet is always the sun and rendering the sun dynamically now.

data/shader/gameobjects.frag

@@ -2,19 +2,25 @@
 
 varying vec3  vertex;
 varying vec3  normal;
+varying vec3  lightDirection;
 
-uniform vec3 materialColor;
 uniform vec3  lightColor;
 uniform vec3  lightPosition;
-
+uniform float materialKind;
-varying vec3 lightDirection;
+uniform vec3  materialColor;
 
 void main()
 {
   vec3 Eye       = normalize(-vertex);
   vec3 Reflected = normalize(reflect( -lightPosition, normal));
 
-  vec3 IAmbient  = vec3(0.2f);
+  vec3 IAmbient  = vec3(0.05f);
+
+  if (materialKind == 6) {
+      // sun: shines by itself
+      gl_FragColor = vec4(materialColor, 1.0);
+      return;
+  }
 
     // TODO: add noise texture
   vec3 IDiffuse  = vec3(materialColor) * lightColor * max(dot(normal, lightDirection), 0.0);

game/renderer_polygon_3d/renderer_polygon_3d.cpp

@@ -60,11 +60,7 @@ namespace endofthejedi {
         // TODO: add ONE sun planet
         // TODO: add lights for explosions
 
-        glm::vec3 c = glm::vec3(1.0, 1.0, 0.8);
+        configureLightningInShader();
-        glUniform3f(m_shader.location("lightColor"), c.x, c.y, c.z);
-
-		glm::vec3 p = glm::vec3(0.3f, 0.4f, 0.0f);
-        glUniform3f(m_shader.location("lightPosition"), p.x, p.y, p.z);
 
         renderPlanets();
         renderShips();
@@ -167,13 +163,15 @@ namespace endofthejedi {
     {
         m_planetModel->bind();
 
+        // TODO: put material into attributes and render witd glDrawInstanced
+        // 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));
 
             glm::vec3 c = planet->getColor();
             glUniform3f(m_shader.location("materialColor"), c.x, c.y, c.z);
-            glUniform3f(m_shader.location("color"), c.x, c.y, c.z);
+            glUniform1f(m_shader.location("materialKind"), (float) planet->material);
 
             m_planetModel->render();
         }
@@ -293,4 +291,19 @@ namespace endofthejedi {
         }
         glPolygonMode(GL_FRONT, GL_FILL);
     }
+
+    void RendererPolygon3d::configureLightningInShader()
+    {
+        glm::vec3 c = glm::vec3(1.0, 1.0, 0.8);
+        glUniform3f(m_shader.location("lightColor"), c.x, c.y, c.z);
+
+		glm::vec3 p = glm::vec3(0.3f, 0.4f, 0.0f);
+        for (const game::Planet *planet : m_state->planets) {
+            if (planet->material == game::Planet::Material::Sun) {
+                p = glm::vec3(planet->position, 0.0);
+                break;
+            }
+        }
+        glUniform3f(m_shader.location("lightPosition"), p.x, p.y, p.z);
+    }
 }

game/renderer_polygon_3d/renderer_polygon_3d.hpp

@@ -49,6 +49,8 @@ namespace endofthejedi {
 
             void renderTraces();
 
+            void configureLightningInShader();
+
         private:
             // all models are also here (for easy reloading etc.)
             std::vector<PolygonModel*>  m_models;

game/state/planet.cpp

@@ -0,0 +1,18 @@
+#include "planet.hpp"
+
+namespace game {
+
+    glm::vec3 Planet::getColor() const
+    {
+        switch (material) {
+        case Material::Rock:  return glm::vec3(0.4, 0.2, 0.1);
+        case Material::Metal: return glm::vec3(0.1, 0.1, 0.1);
+        case Material::Sand:  return glm::vec3(0.6, 0.6, 0.3);
+        case Material::Gas:   return glm::vec3(0.8, 0.5, 0.2);
+        case Material::Ice:   return glm::vec3(0.7, 0.8, 1.0);
+        case Material::Water: return glm::vec3(0.2, 0.7, 1.0);
+        case Material::Sun:   return glm::vec3(1.0, 1.0, 0.8);
+        default:              return glm::vec3(1.0, 0.0, 1.0); // diagnostic color
+        }
+    }
+}

game/state/planet.hpp

@@ -11,37 +11,26 @@ class Planet : public Object {
      * Planets are build out of one material.
      * TODO: support mixture or multiple material per planet.
      */
-    enum class Material { Rock, Metal, Sand, Gas, Ice, Water, Sun };
+    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(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()) {}
+        : Object(pos, r), id(id), material(mat), seed(rand())
+    {
+    }
 
-    glm::vec3 getColor() const {
+    glm::vec3 getColor() const;
-        switch (material) {
-        case Material::Rock:
-            return {x : 0.19, y : 0.19, z : 0.19};
-        case Material::Metal:
-            return {x : 0.19, y : 0.19, z : 0.19};
-        case Material::Sand:
-            return {x : 0.19, y : 0.19, z : 0.19};
-        case Material::Gas:
-            return {x : 0.19, y : 0.19, z : 0.19};
-        case Material::Ice:
-            return {x : 0.19, y : 0.19, z : 0.19};
-        case Material::Water:
-            return {x : 0.19, y : 0.40, z : 0.72};
-        case Material::Sun:
-            return {x : 0.64, y : 0.67, z : 0.19};
-        }
-        return {x : 0.1, y : 0.1, z : 0.1};
-    }
 
     int id;
-    Material material; // for rendering and physics (can fly through sun and
+
-                       // outer gas planets)
+    // for rendering and physics (can fly through sun and outer gas planets)
-    int seed;          // just for rendering variation
+    Material material;
+
+    // just for rendering variation
+    int seed;
 };
 }

game/state/state.cpp

@@ -49,7 +49,12 @@ namespace game {
                 }
             } while(glm::length(pos) < 0.2 && tries++ < 1000);
 
-            planets.push_back(new Planet(pos, i, 0.03 + 0.07*util::randf_0_1()));
+            Planet::Material mat = Planet::Material::Rock;
+            if (i == 0) {
+                mat = Planet::Material::Sun;
+            }
+
+            planets.push_back(new Planet(pos, i, 0.03 + 0.07*util::randf_0_1(), mat));
         }
     }