From 4137f87f2206542515f6165714d785d21f865a5d Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Wed, 5 Jul 2017 19:58:09 +0200
Subject: [PATCH] clarify Rect.Intersect doc

---
 geometry.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/geometry.go b/geometry.go
index 1c61477..3b2b8b3 100644
--- a/geometry.go
+++ b/geometry.go
@@ -268,6 +268,8 @@ func (r Rect) Union(s Rect) Rect {
 }
 
 // Intersect returns the maximal Rect which is covered by both r and s. Rects r and s must be normalized.
+//
+// If r and s don't overlap, this function returns R(0, 0, 0, 0).
 func (r Rect) Intersect(s Rect) Rect {
 	t := R(
 		math.Min(r.Max.X, s.Max.X),