DataItem.h

/*******************************************************************************
 DataItem: OpenGL context data.
 Copyright (c) 2006-2008 Jordan Van Aalsburg, Oliver Kreylos

 This file is part of the Dynamics Toolset.

 The Dynamics Toolset is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by the Free
 Software Foundation, either version 3 of the License, or (at your option) any
 later version.

 The Dynamics Toolset 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 GNU General Public License for more
 details.

 You should have received a copy of the GNU General Public License
 along with the Dynamics Toolset. If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
#ifndef DATA_ITEM_H
#define DATA_ITEM_H

// Vrui includes
//
#include <GL/GLObject.h>
#include <GL/GLContextData.h>
#include <GL/GLExtensionManager.h>
#include <GL/Extensions/GLARBPointParameters.h>
#include <GL/Extensions/GLARBVertexBufferObject.h>
#include <GL/Extensions/GLARBShaderObjects.h>

namespace DTS
{

/** Data structure storing OpenGL-dependent application data.
 */
struct DataItem: public GLObject::DataItem
{
   public:
      bool hasPointParameterExtension; ///< Flag whether point parameters are supported.
      bool hasVertexBufferObjectExtension; ///< GFlag whether VBOs are supported.
      bool hasShaders; ///< Flag whether local OpenGL supports GLSL shaders.

      GLuint vertexBufferId; ///< Vertex object buffer ID.
      GLuint spriteTextureObjectId; ///< Texture object ID for point sprites.

      unsigned int version; ///< Used for syncing VOB rendering.

      /* State for vertex / fragment shaders: */

      GLhandleARB vertexShaderObject, fragmentShaderObject, programObject; ///< Shader for proper point size attenuation
      GLint scaledParticleRadiusLocation; ///< Location of particle radius uniform variable in shader program
      GLint tex0Location; ///< Location of texture sample uniform variable in shader program
      int numParticles; ///< Number of particles still alive at last step()


      /* Variables for StaticSolverTool */
      GLuint dataDisplayListId;
      unsigned int dataDisplayListVersion;

      DataItem(void);
      virtual ~DataItem(void);
};

}

#endif