From 711c262004ddb1b054d182fcd51728c58447a41c Mon Sep 17 00:00:00 2001
From: David Williams <david@volumesoffun.com>
Date: Thu, 21 May 2015 23:17:49 +0200
Subject: [PATCH] Skip outputting some indices.

---
 include/PolyVox/MarchingCubesSurfaceExtractor.inl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/PolyVox/MarchingCubesSurfaceExtractor.inl b/include/PolyVox/MarchingCubesSurfaceExtractor.inl
index 2b8ba592..506f9185 100644
--- a/include/PolyVox/MarchingCubesSurfaceExtractor.inl
+++ b/include/PolyVox/MarchingCubesSurfaceExtractor.inl
@@ -402,6 +402,13 @@ namespace PolyVox
 						m_sampVolume.movePositiveZ();
 					}
 
+					// Now output the indices. For the first row, column or slice there aren't
+					// any (the region size in cells is one less than the region size in voxels)
+					if ((!isPrevXAvail) || (!isPrevYAvail) || (!isPrevZAvail))
+					{
+						continue;
+					}
+
 					int32_t indlist[12];
 
 					m_sampVolume.setPosition(iXVolSpace, iYVolSpace, iZVolSpace);