Moved sprite rendering into AnimatingSystem

Refactored how systems work slightly. Now, rendering can be done by a number of systems working together. Since the AnimatingSystem handles the animation of sprites, it should also handle the rendering of them. Because of this, the RenderingSystem has been removed.

7 files changed, 96 insertions, 67 deletions

@@ -5,11 +5,12 @@
 #include "components/droppable.h"
 #include "components/ponderable.h"
 #include "components/orientable.h"
-#include "systems/rendering.h"
 #include "systems/controlling.h"
 #include "systems/pondering.h"
 #include "systems/animating.h"
 #include "animation.h"
+#include "renderer.h"
+#include "consts.h"
 
 void key_callback(GLFWwindow* window, int key, int, int action, int)
 {
@@ -22,14 +23,13 @@ void key_callback(GLFWwindow* window, int key, int, int action, int)
     return;
   }
 
-  game.systemManager_.getSystem<ControllingSystem>().input(key, action);
+  game.systemManager_.input(key, action);
 }
 
 Game::Game(GLFWwindow* window) : window_(window)
 {
   systemManager_.emplaceSystem<ControllingSystem>(*this);
   systemManager_.emplaceSystem<PonderingSystem>(*this);
-  systemManager_.emplaceSystem<RenderingSystem>(*this);
   systemManager_.emplaceSystem<AnimatingSystem>(*this);
 
   int player = entityManager_.emplaceEntity();
@@ -64,6 +64,7 @@ void Game::execute()
   double lastTime = glfwGetTime();
   const double dt = 0.01;
   double accumulator = 0.0;
+  Texture texture(GAME_WIDTH, GAME_HEIGHT);
 
   while (!(shouldQuit_ || glfwWindowShouldClose(window_)))
   {
@@ -76,13 +77,14 @@ void Game::execute()
     accumulator += frameTime;
     while (accumulator >= dt)
     {
-      systemManager_.getSystem<ControllingSystem>().tick(dt);
-      systemManager_.getSystem<PonderingSystem>().tick(dt);
-      systemManager_.getSystem<AnimatingSystem>().tick(dt);
+      systemManager_.tick(dt);
 
       accumulator -= dt;
     }
 
-    systemManager_.getSystem<RenderingSystem>().tick(frameTime);
+    // Render
+    texture.fill(texture.entirety(), 0, 0, 0);
+    systemManager_.render(texture);
+    texture.renderScreen();
   }
 }
@@ -4,6 +4,7 @@
 #include "entity_manager.h"
 
 class Game;
+class Texture;
 
 class System {
 public:
@@ -16,7 +17,35 @@ public:
 
   virtual ~System() = default;
 
-  virtual void tick(double dt) = 0;
+  /**
+   * Updates the state of a system.
+   *
+   * @param dt - The amount of time in seconds that have passed since the last
+   *             update.
+   */
+  virtual void tick(double)
+  {
+  }
+
+  /**
+   * Renders to a texture.
+   *
+   * @param texture - The surface to render to.
+   */
+  virtual void render(Texture&)
+  {
+  }
+
+  /**
+   * Processes keyboard input.
+   *
+   * @param key - The relevant key.
+   *
+   * @param action - The action performed (press, released, etc).
+   */
+  virtual void input(int, int)
+  {
+  }
 
 protected:
 
@@ -39,6 +39,30 @@ public:
     return *dynamic_cast<T*>(systems[systemType]);
   }
 
+  void tick(double dt)
+  {
+    for (std::unique_ptr<System>& sys : loop)
+    {
+      sys->tick(dt);
+    }
+  }
+
+  virtual void render(Texture& texture)
+  {
+    for (std::unique_ptr<System>& sys : loop)
+    {
+      sys->render(texture);
+    }
+  }
+
+  virtual void input(int key, int action)
+  {
+    for (std::unique_ptr<System>& sys : loop)
+    {
+      sys->input(key, action);
+    }
+  }
+
 };
 
 #endif /* end of include guard: SYSTEM_MANAGER_H_544E6056 */
@@ -1,6 +1,7 @@
 #include "animating.h"
 #include "game.h"
 #include "components/animatable.h"
+#include "components/transformable.h"
 
 void AnimatingSystem::tick(double)
 {
@@ -28,6 +29,35 @@ void AnimatingSystem::tick(double)
   }
 }
 
+void AnimatingSystem::render(Texture& texture)
+{
+  std::set<id_type> spriteEntities =
+    game_.getEntityManager().getEntitiesWithComponents<
+      AnimatableComponent,
+      TransformableComponent>();
+
+  for (id_type entity : spriteEntities)
+  {
+    auto& sprite = game_.getEntityManager().
+      getComponent<AnimatableComponent>(entity);
+
+    auto& transform = game_.getEntityManager().
+      getComponent<TransformableComponent>(entity);
+
+    Rectangle dstrect {
+      static_cast<int>(transform.getX()),
+      static_cast<int>(transform.getY()),
+      transform.getW(),
+      transform.getH()};
+
+    const AnimationSet& aset = sprite.getAnimationSet();
+    texture.blit(
+      aset.getTexture(),
+      aset.getFrameRect(sprite.getFrame()),
+      dstrect);
+  }
+}
+
 void AnimatingSystem::startAnimation(id_type entity, std::string animation)
 {
   auto& sprite = game_.getEntityManager().
@@ -3,6 +3,7 @@
 
 #include "system.h"
 #include <string>
+#include "renderer.h"
 
 class AnimatingSystem : public System {
 public:
@@ -13,6 +14,8 @@ public:
 
   void tick(double dt);
 
+  void render(Texture& texture);
+
   void startAnimation(id_type entity, std::string animation);
 
 };
@@ -1,37 +0,0 @@
-#include "rendering.h"
-#include "game.h"
-#include "components/animatable.h"
-#include "components/transformable.h"
-
-void RenderingSystem::tick(double)
-{
-  texture_.fill(texture_.entirety(), 0, 0, 0);
-
-  std::set<id_type> spriteEntities =
-    game_.getEntityManager().getEntitiesWithComponents<
-      AnimatableComponent,
-      TransformableComponent>();
-
-  for (id_type entity : spriteEntities)
-  {
-    auto& sprite = game_.getEntityManager().
-      getComponent<AnimatableComponent>(entity);
-
-    auto& transform = game_.getEntityManager().
-      getComponent<TransformableComponent>(entity);
-
-    Rectangle dstrect {
-      static_cast<int>(transform.getX()),
-      static_cast<int>(transform.getY()),
-      transform.getW(),
-      transform.getH()};
-
-    const AnimationSet& aset = sprite.getAnimationSet();
-    texture_.blit(
-      aset.getTexture(),
-      aset.getFrameRect(sprite.getFrame()),
-      dstrect);
-  }
-
-  texture_.renderScreen();
-}
@@ -1,22 +0,0 @@
-#ifndef RENDERING_H_76ABC02A
-#define RENDERING_H_76ABC02A
-
-#include "system.h"
-#include "renderer.h"
-#include "consts.h"
-
-class RenderingSystem : public System {
-public:
-
-  RenderingSystem(Game& game) : System(game)
-  {
-  }
-
-  void tick(double dt);
-
-private:
-
-  Texture texture_ {GAME_WIDTH, GAME_HEIGHT};
-};
-
-#endif /* end of include guard: RENDERING_H_76ABC02A */