Restructure/refactor of main.c

game/systems/entity_renderer.c

@@ -0,0 +1,14 @@
+#include "systems.h"
+
+void renderEntities(ecs_iter_t *it) {
+    Position *p = ecs_field(it, Position, 1);
+    Size *s = ecs_field(it, Size, 2);
+    Rotation *r = ecs_field(it, Rotation, 3);
+    TextureRegion *t = ecs_field(it, TextureRegion, 4);
+
+    for (i32 i = 0; i < it->count; i++) {
+        Rectangle dst = {p[i].x, p[i].y, s[i].x, s[i].y};
+        Vector2 origin = {dst.width * 0.5f, dst.height * 0.5f};
+        DrawTexturePro(t[i].texture, t[i].rec, dst, origin, r[i], WHITE);
+    }
+}