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[hackover2013-badge-firmware.git] / badge / util / rectangle.h

diff --git a/badge/util/rectangle.h b/badge/util/rectangle.h
index 39ba5ca..4e352f0 100644 (file)
--- 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;