From 31c96523fb080f70917a921923139ef2b54c5393 Mon Sep 17 00:00:00 2001
From: ZappoMan <bradh@konamoxt.com>
Date: Fri, 27 Feb 2015 15:57:46 -0800
Subject: [PATCH] add support for transparency in RAW heightmaps

---
 libraries/metavoxels/src/Spanner.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/metavoxels/src/Spanner.cpp b/libraries/metavoxels/src/Spanner.cpp
index fd5a59fdfb..d2dff016e3 100644
--- a/libraries/metavoxels/src/Spanner.cpp
+++ b/libraries/metavoxels/src/Spanner.cpp
@@ -648,7 +648,7 @@ void HeightfieldHeightEditor::select() {
         const float CONVERSION_SCALE = 65534.0f / numeric_limits<quint16>::max();
         for (int i = 0; i < rawSize; i++, dest += size) {
             for (quint16* lineDest = dest, *end = dest + rawSize; lineDest != end; lineDest++, src++) {
-                *lineDest = (quint16)(*src * CONVERSION_SCALE) + CONVERSION_OFFSET;
+                *lineDest = (*src == 0) ? 0 : (quint16)(*src * CONVERSION_SCALE) + CONVERSION_OFFSET;
             }
         }
         emit heightChanged(_height = new HeightfieldHeight(size, contents));