Very basic animations

game/systems/animations.c

@@ -0,0 +1,17 @@
+#include "systems.h"
+
+void updateAnimations(ecs_iter_t *it) {
+    Animation *anim = ecs_field(it, Animation, 1);
+    TextureRegion *t = ecs_field(it, TextureRegion, 2);
+
+    float dt = GetFrameTime();
+
+    for (i32 i = 0; i < it->count; i++) {
+        anim[i].elapsed += dt;
+        if (anim[i].elapsed < anim[i].frameDuration) continue;
+
+        anim[i].currFrame = (anim[i].currFrame + 1) % anim[i].frameCount;
+        anim[i].elapsed = 0.0f;
+        t[i].rec.x = anim[i].firstFrame.rec.x + anim[i].currFrame * t[i].rec.width;
+    }
+}

game/systems/systems.h

@@ -6,5 +6,6 @@
 #include "../components.h"
 
 void renderEntities(ecs_iter_t *it);
+void updateAnimations(ecs_iter_t *it);
 
 #endif //PIXELDEFENSE_SYSTEMS_H