From 29d8ca4ce4aef8e0afca62b8ace9ee18a24a9ffd Mon Sep 17 00:00:00 2001
From: maobaoqi <mbaoqi@gmail.com>
Date: Tue, 15 Jan 2019 14:34:42 +0000
Subject: [PATCH] Fix bug in CrossProduct function in boing example

Closes #1418.
---
 examples/boing.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/boing.c b/examples/boing.c
index 5b8e667e..d13c5841 100644
--- a/examples/boing.c
+++ b/examples/boing.c
@@ -165,7 +165,7 @@ void CrossProduct( vertex_t a, vertex_t b, vertex_t c, vertex_t *n )
    v2 = c.y - a.y;
    v3 = c.z - a.z;
 
-   n->x = u2 * v3 - v2 * v3;
+   n->x = u2 * v3 - v2 * u3;
    n->y = u3 * v1 - v3 * u1;
    n->z = u1 * v2 - v1 * u2;
 }