Add an animation system.

1 files changed, 33 insertions, 0 deletions

diff --git a/animation_system.c b/animation_system.c
new file mode 100644
index 0000000..22317ac
--- /dev/null
+++ b/animation_system.c
@@ -0,0 +1,33 @@
+#include "animation.h"
+#include "components.h"
+#include "world.h"
+
+void animation_system(World* world) {
+	int i;
+	unsigned bits;
+	CSprite* sprite;
+	CAnimated* animated;
+	const Animation* animation;
+
+	for (i = 0; i < world->entity_count; i++) {
+		bits = world->bitmask[i];
+		if ((bits & ctype_sprite) && (bits & ctype_animated)) {
+			sprite = &world->sprites[i];
+			animated = &world->animateds[i];
+			animation = get_animation(animated->id);
+
+			animated->timer++;
+			if (animated->timer > animation->slowness) {
+				animated->frame++;
+				animated->timer = 0;
+			}
+
+			if (animated->frame >= animation->frame_count) {
+				animated->frame = 0;
+				animated->timer = 0;
+			}
+
+			sprite->rect = animation->frames[animated->frame];
+		}
+	}
+}