From c1f3a0f2e48f4dce2e2bdd8a8fe492b89b6a5ab8 Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Thu, 15 Jun 2017 03:27:58 -0600
Subject: [PATCH] mathlib: ClosestPointOnLineSegment: handle degenerate line
 segment

---
 common/mathlib.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/mathlib.cc b/common/mathlib.cc
index 24d26128..d70f0a05 100644
--- a/common/mathlib.cc
+++ b/common/mathlib.cc
@@ -762,9 +762,9 @@ float DistToLineSegment(const qvec3f &v, const qvec3f &w, const qvec3f& p)
 qvec3f ClosestPointOnLineSegment(const qvec3f &v, const qvec3f &w, const qvec3f& p)
 {
     const float frac = FractionOfLine(v, w, p);
-    if (frac > 1)
+    if (frac >= 1)
         return w;
-    if (frac < 0)
+    if (frac <= 0)
         return v;
     
     return ClosestPointOnLine(v, w, p);