Added s/getMaxNumOfTextureUnits control to osgGA::StateSetManipulator, and set the default to 4.

include/osgGA/StateSetManipulator

@@ -53,6 +53,9 @@ public:
 
         /** Get the keyboard and mouse usage of this manipulator.*/
         virtual void getUsage(osg::ApplicationUsage& usage) const;
+        
+        void setMaximumNumOfTextureUnits(unsigned int i) { _maxNumOfTextureUnits = i; }
+        unsigned int getMaximumNumOfTextureUnits() const { return _maxNumOfTextureUnits; }
 
 protected:
 
@@ -62,6 +65,7 @@ protected:
         bool _backface;
         bool _lighting;
         bool _texture;
+        unsigned int _maxNumOfTextureUnits;
 };
 
 }

src/osgGA/StateSetManipulator.cpp

@@ -16,7 +16,11 @@
 using namespace osg;
 using namespace osgGA;
 
-StateSetManipulator::StateSetManipulator(): _drawState(NULL)
+StateSetManipulator::StateSetManipulator():
+    _backface(false),
+    _lighting(false),
+    _texture(false),
+    _maxNumOfTextureUnits(4)
 {
 }
 
@@ -83,10 +87,9 @@ bool StateSetManipulator::handle(const GUIEventAdapter& ea,GUIActionAdapter& aa)
 //                    ( _drawState->getAttribute( osg::StateAttribute::TEXTURE ) );
 //                cout << tex->numTextureUnits() << endl;
 
-                unsigned int nunit = 8; // should actually use the _real_ num units here, but how? 
                 unsigned int mode = osg::StateAttribute::OVERRIDE|osg::StateAttribute::OFF;
                 if ( _texture ) mode = osg::StateAttribute::INHERIT|osg::StateAttribute::ON;
-                for( unsigned int ii=0; ii<nunit; ii++ )
+                for( unsigned int ii=0; ii<_maxNumOfTextureUnits; ii++ )
                 {
                         _drawState->setTextureMode( ii, GL_TEXTURE_1D, mode );
                         _drawState->setTextureMode( ii, GL_TEXTURE_2D, mode );

src/osgWrappers/osgGA/StateSetManipulator.cpp

@@ -34,6 +34,9 @@ BEGIN_OBJECT_REFLECTOR(osgGA::StateSetManipulator)
 	I_Method2(bool, handle, IN, const osgGA::GUIEventAdapter &, ea, IN, osgGA::GUIActionAdapter &, us);
 	I_Method1(void, accept, IN, osgGA::GUIEventHandlerVisitor &, x);
 	I_Method1(void, getUsage, IN, osg::ApplicationUsage &, usage);
+	I_Method1(void, setMaximumNumOfTextureUnits, IN, unsigned int, i);
+	I_Method0(unsigned int, getMaximumNumOfTextureUnits);
+	I_Property(unsigned int, MaximumNumOfTextureUnits);
 	I_Property(osg::StateSet *, StateSet);
 END_REFLECTOR