From 66184a38495371e24a30dcdbbe79a1af081dfdc6 Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Wed, 7 Sep 2016 15:12:19 -0600
Subject: [PATCH] light: CalcualateVertexNormals: skip degenerate faces

---
 light/light.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/light/light.cc b/light/light.cc
index 05ffb692..50fec2c0 100644
--- a/light/light.cc
+++ b/light/light.cc
@@ -509,6 +509,11 @@ CalcualateVertexNormals(const bsp2_t *bsp)
     for (int i = 0; i < bsp->numfaces; i++)
     {
         const bsp2_dface_t *f = &bsp->dfaces[i];
+        if (f->numedges < 3) {
+            logprint("CalcualateVertexNormals: face %d is degenerate with %d edges\n", i, f->numedges);
+            continue;
+        }
+        
         const auto &neighboursToSmooth = smoothFaces[f];
         vec3_t f_norm;