X-Git-Url: https://git.rohieb.name/hackover2013-badge-firmware.git/blobdiff_plain/4cb2d309b35bc7acc33483bdcd0af2a749206369..5df5b3536a7e824c1340a07f3c26a7c61e78b68b:/badge/util/rectangle.h

diff --git a/badge/util/rectangle.h b/badge/util/rectangle.h
index 39ba5ca..4e352f0 100644
--- a/badge/util/rectangle.h
+++ b/badge/util/rectangle.h
@@ -17,6 +17,14 @@ static inline vec2d vec2d_add(vec2d v1, vec2d v2) {
   return r;
 }
 
+static inline vec2d vec2d_neg(vec2d v) {
+  vec2d r = {
+    fixed_point_neg(v.x),
+    fixed_point_neg(v.y)
+  };
+  return r;
+}
+
 typedef struct {
   vec2d pos;
   vec2d extent;