1 files changed, 68 insertions, 0 deletions

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+#include "animating.h"
+#include "game.h"
+#include "components/animatable.h"
+#include "components/transformable.h"
+
+void AnimatingSystem::tick(double)
+{
+  std::set<id_type> spriteEntities =
+    game_.getEntityManager().getEntitiesWithComponents<AnimatableComponent>();
+
+  for (id_type entity : spriteEntities)
+  {
+    auto& sprite = game_.getEntityManager().
+      getComponent<AnimatableComponent>(entity);
+
+    sprite.setCountdown(sprite.getCountdown() + 1);
+
+    const Animation& anim = sprite.getAnimation();
+    if (sprite.getCountdown() >= anim.getDelay())
+    {
+      sprite.setFrame(sprite.getFrame() + 1);
+      sprite.setCountdown(0);
+
+      if (sprite.getFrame() >= anim.getFirstFrame() + anim.getNumFrames())
+      {
+        sprite.setFrame(anim.getFirstFrame());
+      }
+    }
+  }
+}
+
+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().
+    getComponent<AnimatableComponent>(entity);
+
+  sprite.setAnimation(animation);
+  sprite.setFrame(sprite.getAnimation().getFirstFrame());
+}