From 2b2c1b5671b7d01f79c5d79a35bf0aa88f562d3b Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 25 Nov 2011 09:24:50 +0000
Subject: [PATCH] From Jean-Sebastien Guay, fix for handling texture unit >= 8
 and negative LigthNum.

---
 src/osgShadow/ViewDependentShadowMap.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/osgShadow/ViewDependentShadowMap.cpp b/src/osgShadow/ViewDependentShadowMap.cpp
index 6860ad862..68016c704 100644
--- a/src/osgShadow/ViewDependentShadowMap.cpp
+++ b/src/osgShadow/ViewDependentShadowMap.cpp
@@ -1052,7 +1052,14 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
             // pass on shadow data to ShadowDataList
             sd->_textureUnit = textureUnit;
             
-            sdl.push_back(sd);
+            if (textureUnit >= 8)
+            {
+                OSG_NOTICE<<"Shadow texture unit is invalid for texgen, will not be used."<<std::endl;
+            }
+            else
+            {
+                sdl.push_back(sd);
+            }
             
             // increment counters.
             ++textureUnit;
@@ -1095,7 +1102,7 @@ bool ViewDependentShadowMap::selectActiveLights(osgUtil::CullVisitor* cv, ViewDe
         ++itr)
     {
         const osg::Light* light = dynamic_cast<const osg::Light*>(itr->first.get());
-        if (light)
+        if (light && light->getLightNum() >= 0)
         {
             // is LightNum matched to that defined in settings
             if (settings && settings->getLightNum()>=0 && light->getLightNum()!=settings->getLightNum()) continue;