From 939522a214b59745591c0be8ab522e53de4c8d22 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 23 Feb 2011 13:56:41 +0000
Subject: [PATCH] Added support for negative --xMultipler, --yMultiple and
 --zMultiplier values

---
 examples/osgvolume/osgvolume.cpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/examples/osgvolume/osgvolume.cpp b/examples/osgvolume/osgvolume.cpp
index 3afa492e7..d561f72e8 100644
--- a/examples/osgvolume/osgvolume.cpp
+++ b/examples/osgvolume/osgvolume.cpp
@@ -1550,7 +1550,18 @@ int main( int argc, char **argv )
         }
     };
 
-    layer->setLocator(new osgVolume::Locator(*matrix));
+    if (xMultiplier<0.0 || yMultiplier<0.0 || zMultiplier<0.0)
+    {
+        layer->setLocator(new osgVolume::Locator(
+            osg::Matrix::translate(xMultiplier<0.0 ? -1.0 : 0.0, yMultiplier<0.0 ? -1.0 : 0.0, zMultiplier<0.0 ? -1.0 : 0.0) *
+            osg::Matrix::scale(xMultiplier<0.0 ? -1.0 : 1.0, yMultiplier<0.0 ? -1.0 : 1.0, zMultiplier<0.0 ? -1.0 : 1.0) *
+            (*matrix)
+            ));;
+    }
+    else
+    {
+        layer->setLocator(new osgVolume::Locator(*matrix));
+    }
     tile->setLocator(new osgVolume::Locator(*matrix));
 
     tile->setLayer(layer.get());