a-game

commit 58903f12bd2027cf38c6fbcd3522751619bbddf0
parent 124e4a953fcda1ed6ca0dcb0685f55da122be2d4
Author: Amin Mesbah <dev@aminmesbah.com>
Date:   Fri, 19 Apr 2019 17:02:13 -0700

Do proper AABB hit detection

Diffstat:
M
src/glmth.h
 | 
8
++++++--

1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/glmth.h b/src/glmth.h
@@ -7,9 +7,13 @@
 
 internal inline bool glmth_aabb_intersect(rect r1, rect r2)
 {
+    f32 total_w = (r1.max.x - r1.min.x) + (r2.max.x - r2.min.x);
+    f32 total_h = (r1.max.y - r1.min.y) + (r2.max.y - r2.min.y);
     bool aabbs_do_indeed_intersect = (
-        (r1.min.x >= r2.max.x && r1.min.y >= r2.max.y)
-        || (r2.min.x >= r1.max.x && r2.min.y >= r1.max.y)
+        fabsf(r1.max.x - r2.min.x) <= total_w
+        && fabsf(r1.max.y - r2.min.y) <= total_h
+        && fabsf(r2.max.x - r1.min.x) <= total_w
+        && fabsf(r2.max.y - r1.min.y) <= total_h
     );
     return aabbs_do_indeed_intersect;
 }