Added new TexGenNode class for positioning tex gens.

src/osg/GNUmakefile

@@ -85,6 +85,7 @@ CXXFILES =\
 	TexEnv.cpp\
 	TexEnvCombine.cpp\
 	TexGen.cpp\
+	TexGenNode.cpp\
 	TexMat.cpp\
 	Texture.cpp\
 	Texture2D.cpp\

src/osg/TexGenNode.cpp

@@ -0,0 +1,54 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+#include <osg/TexGenNode>
+
+using namespace osg;
+
+TexGenNode::TexGenNode()
+{
+    _value = StateAttribute::ON;
+    _stateset = new StateSet;
+    _texgen = new TexGen;
+    setLocalStateSetModes(_value);
+}
+
+TexGenNode::TexGenNode(const TexGenNode& cn, const CopyOp& copyop):
+    Group(cn,copyop),
+    _value(cn._value),
+    _texgen(static_cast<TexGen*>(copyop(cn._texgen.get())))
+{
+}
+
+TexGenNode::~TexGenNode()
+{
+}
+
+void TexGenNode::setTexGen(TexGen* texgen)
+{
+    _texgen = texgen;
+    setLocalStateSetModes(_value);
+}
+
+// Set the GLModes on StateSet associated with the TexGen.
+void TexGenNode::setStateSetModes(StateSet& stateset,const StateAttribute::GLModeValue value) const
+{
+    if (_texgen.valid())
+        stateset.setAssociatedModes(_texgen.get(),value);
+}
+
+void TexGenNode::setLocalStateSetModes(const StateAttribute::GLModeValue value)
+{
+    if (!_stateset) _stateset = new StateSet;
+    _stateset->setAllToInherit();
+    setStateSetModes(*_stateset,value);
+}

src/osgUtil/CullVisitor.cpp

@@ -17,6 +17,7 @@
 #include <osg/Billboard>
 #include <osg/LightSource>
 #include <osg/ClipNode>
+#include <osg/TexGenNode>
 #include <osg/OccluderNode>
 #include <osg/Notify>
 #include <osg/TexEnv>
@@ -874,6 +875,22 @@ void CullVisitor::apply(ClipNode& node)
     if (node_state) popStateSet();
 }
 
+void CullVisitor::apply(TexGenNode& node)
+{
+    // push the node's state.
+    StateSet* node_state = node.getStateSet();
+    if (node_state) pushStateSet(node_state);
+
+    RefMatrix& matrix = getModelViewMatrix();
+
+    addPositionedAttribute(&matrix,node.getTexGen());
+
+    handle_cull_callbacks_and_traverse(node);
+
+    // pop the node's state off the geostate stack.    
+    if (node_state) popStateSet();
+}
+
 void CullVisitor::apply(Group& node)
 {
     if (isCulled(node)) return;