Add ECS.

1 files changed, 23 insertions, 0 deletions

diff --git a/sprite_system.c b/sprite_system.c
new file mode 100644
index 0000000..99360fc
--- /dev/null
+++ b/sprite_system.c
@@ -0,0 +1,23 @@
+#include "asset.h"
+#include "components.h"
+#include "render.h"
+#include "world.h"
+
+void sprite_system(const World* world) {
+	int i;
+	unsigned bits;
+	const CSprite* sprite;
+	const CPosition* pos;
+	const Bitmap* b;
+
+	for (i = 0; i < world->entity_count; i++) {
+		bits = world->bitmask[i];
+		if ((bits & ctype_position) && (bits & ctype_sprite)) {
+			pos = &world->positions[i];
+			sprite = &world->sprites[i];
+
+			b = get_bitmap(sprite->id);
+			render_bitmap(b, pos->x, pos->y, &sprite->rect);
+		}
+	}
+}