1 files changed, 10 insertions, 0 deletions
diff --git a/vertex.c b/vertex.c
index 970bbbc..92c6b0a 100644
--- a/vertex.c
+++ b/vertex.c
@@ -43,6 +43,16 @@ dupvertex(Vertex *v)
 	return nv;
 }
 
+void
+swapvertex(Vertex *a, Vertex *b)
+{
+	Vertex t;
+
+	t = *a;
+	*a = *b;
+	*b = t;
+}
+
 /*
  * linear attribute interpolation
  */