Toggle-able AA

button Q toggles anti-aliasing (handled in RenderSystem)

ECS/Systems/RenderSystem.h

@@ -48,7 +48,7 @@ void renderQuad()
     glBindVertexArray(0);
 }
 
-class RenderSystem : public EntitySystem {
+class RenderSystem : public EntitySystem, public EventSubscriber<InputEvent> {
 public:
     struct RenderObject {
         RenderObject(const glm::mat4 &matrix, const glm::vec3 &origin, unsigned int textureId, unsigned int normalId, const Mesh &mesh, float distance, const Material &material)
@@ -63,6 +63,7 @@ public:
         void render(Shader shader) const {
             glm::mat4 model_matrix = matrix;
             model_matrix[3] = glm::vec4(origin, 1.0);
+
             shader.setMat4("model", model_matrix);
 
             // 0 can't be a valid texture name, so we use it for meshes without textures here
@@ -167,6 +168,28 @@ public:
     }
 
     RenderSystem() {
+        setup();
+    }
+
+    void configure(World *pWorld) override {
+        myWorld = pWorld;
+
+        myWorld->subscribe<InputEvent>(this);
+    }
+
+    void receive(World *pWorld, const InputEvent &event) override {
+        if (event.key == GLFW_KEY_Q) {
+            if (event.action == GLFW_PRESS) {
+                if (glIsEnabled(GL_MULTISAMPLE)) {
+                    glDisable(GL_MULTISAMPLE);
+                } else {
+                    glEnable(GL_MULTISAMPLE);
+                }
+            }
+        }
+    }
+
+    void setup() {
         // Configure depth map
         glGenFramebuffers(1, &depthMapFBO);
 
@@ -274,6 +297,8 @@ public:
 
     unsigned int depthMap;
     unsigned int depthMapFBO;
+
+    World *myWorld;
 };
 
 #endif //ECSGAME_RENDERSYSTEM_H

main.cpp

@@ -46,6 +46,9 @@ int main() {
     if (!glfwInit())
         return -1;
     
+    // Anti Aliasing
+    glfwWindowHint(GLFW_SAMPLES, 4);
+
     /* Create a windowed mode window and its OpenGL context */
     window = glfwCreateWindow(1280, 720, "ECSGame", NULL, NULL);
     if (!window) {
@@ -204,7 +207,7 @@ int main() {
         renderSystem->render(world, defaultShader, shadowShader, debugShader);
 
         ring->get<Transform>()->rotate(delta * 100.0, glm::vec3(0.0, 1.0, 0.0));
-        sun->get<DirectionalLight>()->direction = glm::normalize(glm::vec3(glm::rotate(glm::mat4(1), (float)elapsed_time * 0.3f, glm::vec3(0.0, 1.0, 0.0)) * glm::vec4(1.0, 1.0, 1.0, 0.0)));
+        sun->get<DirectionalLight>()->direction = glm::normalize(glm::vec3(glm::rotate(glm::mat4(1), (float)elapsed_time * 0.5f, glm::vec3(0.0, 1.0, 0.0)) * glm::vec4(1.0, 1.0, 1.0, 0.0)));
 
         /* Swap front and back buffers */
         glfwSwapBuffers(window);