1 files changed, 4 insertions, 0 deletions
diff --git a/Vertex.h b/Vertex.h
index c82bd59..665430d 100644
--- a/Vertex.h
+++ b/Vertex.h
@@ -10,6 +10,10 @@ class Vertex
     float getY() const {return y;}
     float getZ() const {return z;}
 
+    float distanceSq(const Vertex &v) const {
+      return x*v.x + y*v.y + z*v.z;
+    }
+
   protected:
     float x, y, z;
 };