diff --git a/pointf.go b/pointf.go
index c18a04d..0a397a7 100644
--- a/pointf.go
+++ b/pointf.go
@@ -10,6 +10,9 @@ type PointF struct {
 	X, Y float64
 }
 
+// ZeroPtF is initialized on (0, 0).
+var ZeroPtF = PointF{X: 0, Y: 0}
+
 // PtF is a shorthand function to create a point.
 func PtF(x, y float64) PointF {
 	return PointF{X: x, Y: y}