DtExampleShaderManager.h

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// /****************************************************************************** 
// ** Copyright (c) 2019 MAK Technologies, Inc. 
// ** All rights reserved. 
// ******************************************************************************/ 


#ifndef DtExampleShaderManager_H_
#define DtExampleShaderManager_H_

#include <vrvCore/DtDe.h>
#include <vrvCore/DtUniqueID.h> 

#include <osg/ref_ptr>

namespace osg
{
   class StateSet;
   class Uniform;
}

namespace osgEarth
{
   class VirtualProgram;
}

namespace makVrv
{

   class DtExampleShaderManager
   {

   public:

      DtExampleShaderManager(DtDe& de, osg::StateSet *ss);

      virtual ~DtExampleShaderManager();

      //Function for changing the color that will be added to the fragments color
      virtual void changeColorOverride(int color, float deltaChange);

      //Function for modifying the scale that will be applied to the model
      virtual void changeScale(int axis, float deltaChange);


   protected:

      DtDe& myDe;

      //model state set to attach the custom shaders to
      osg::ref_ptr<osg::StateSet> myModelStateSet;

      //Uniforms used by the custom shaders
      osg::ref_ptr<osg::Uniform> myColorToAdd;
      osg::ref_ptr<osg::Uniform> myScale;

      //virtual program for the stateset
      osg::ref_ptr<osgEarth::VirtualProgram> myVirtualProgram;

   };

}

#endif