From 10aed43d98229d98f21d1083cd4c44edec4385eb Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Wed, 5 Jun 2019 07:58:02 +0800
Subject: [PATCH] update example

---
 docs/lib-vorono3d.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/lib-vorono3d.md b/docs/lib-vorono3d.md
index 46d784df..311b7df3 100644
--- a/docs/lib-vorono3d.md
+++ b/docs/lib-vorono3d.md
@@ -39,7 +39,10 @@ The preview or rendering of 3D Voronoi is slow. If you want to use this module,
         translate(pt) cube(1);
     }
 
-    voronoi3d(points);
+    intersection() {
+        sphere(r);
+        voronoi3d(points);
+    }
 
 ![voronoi3d](images/lib-voronoi3d-1.JPG)