- {r.x = nx; r.y = ny; r.width = w; r.height = h;}
-
-#define RECT_EQUAL(r1, r2) (r1.x == r2.x && r1.y == r2.y && \
- r1.width == r2.width && r1.height == r2.height)
+ (r).x = (nx), (r).y = (ny), (r).width = (w), (r).height = (h)
+
+#define RECT_EQUAL(r1, r2) ((r1).x == (r2).x && (r1).y == (r2).y && \
+ (r1).width == (r2).width && \
+ (r1).height == (r2).height)
+
+#define RECT_CONTAINS(r, x, y) \
+ ((x) >= (r).x && (x) < (r).x + (r).width && \
+ (y) >= (r).y && (y) < (r).y + (r).height)
+#define RECT_CONTAINS_RECT(r, o) \
+ ((o).x >= (r).x && (o).x + (o).width <= (r).x + (r).width && \
+ (o).y >= (r).y && (o).y + (o).height <= (r).y + (r).height)
+#define RECT_INTERSECTS_RECT(r, o) \
+ ((o).x < (r).x + (r).width && (o).x + (o).width > (r).x && \
+ (o).y < (r).y + (r).height && (o).y + (o).height > (r).y)