X-Git-Url: https://git.rohieb.name/hackover2013-badge-firmware.git/blobdiff_plain/9ae835c864d2b3e651a86ac4af7cfac0979f136a..0e142e7a8d04db5ceaa41a866f67ef6f92fcd189:/badge/util/rectangle.h

diff --git a/badge/util/rectangle.h b/badge/util/rectangle.h
index 4fe5c0e..70d43ba 100644
--- a/badge/util/rectangle.h
+++ b/badge/util/rectangle.h
@@ -13,7 +13,14 @@ static inline vec2d vec2d_add(vec2d v1, vec2d v2) {
     fixed_point_add(v1.x, v2.x),
     fixed_point_add(v1.y, v2.y)
   };
+  return r;
+}
 
+static inline vec2d vec2d_sub(vec2d v1, vec2d v2) {
+  vec2d r = {
+    fixed_point_sub(v1.x, v2.x),
+    fixed_point_sub(v1.y, v2.y)
+  };
   return r;
 }