colorPerFaceRender.h 3.9 KB
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/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
* version 0.1                                                                  *
* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
*                                                                              *
* This library is free software; you can redistribute it and/or modify it      *
* under the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation; either version 2.1 of the License, or (at your     *
* option) any later version.                                                   *
*                                                                              *
* 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 GNU Lesser General Public License  *
* for more details.                                                            *
*                                                                              *
* You should have received a copy of the GNU Lesser General Public License     *
* along with this library; if not, write to the Free Software Foundation,      *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
*                                                                              *
* Web site: http://cgogn.unistra.fr/                                           *
* Contact information: cgogn@unistra.fr                                        *
*                                                                              *
*******************************************************************************/

#ifndef _COLOR_PER_FACE_RENDER
#define _COLOR_PER_FACE_RENDER


#include "Topology/generic/dart.h"
#include "Topology/generic/attributeHandler.h"
#include "Topology/generic/functor.h"
#include "Utils/vbo.h"
#include "Utils/GLSLShader.h"


namespace CGoGN
{

namespace Algo
{

namespace Render
{

namespace GL2
{

/**
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 * Class that update VBO to allow the rendering of per face color rendering
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 * Use with ColorPerVertexShader
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 */
class ColorPerFaceRender
{
protected:
	GLuint m_nbTris;

public:
	/**
	* Constructor
	*/
	ColorPerFaceRender() ;

	/**
	* update drawing buffers
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	* @param vboPosition vbo of positions to update
	* @param vboColor vbo of colors to update
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	* @param map the map
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	* @param positions attribute of position vertices
	* @param colorPerXXX attribute of color (per face, per vertex per face, per what you want)
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	* @param good selector
	*/
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	template<typename PFP, typename ATTRIB>
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	void updateVBO(Utils::VBO& vboPosition, Utils::VBO& vboColor, typename PFP::MAP& map,
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			const VertexAttribute<typename PFP::VEC3>& positions, const ATTRIB& colorPerXXX, const FunctorSelect& good = allDarts) ;
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	/**
	* update drawing buffers
	* @param vboPosition vbo of positions to update
	* @param vboNormals vbo of positions to update
	* @param vboColor vbo of colors to update
	* @param map the map
	* @param positions attribute of position vertices
	* @param normals attribute of normal vertices
	* @param colorPerXXX attribute of color (per face, per vertex per face, per what you want)
	* @param good selector
	*/
	template<typename PFP, typename ATTRIB>
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	void updateVBO(Utils::VBO& vboPosition, Utils::VBO& vboNormals, Utils::VBO& vboColor, typename PFP::MAP& map,
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			const VertexAttribute<typename PFP::VEC3>& positions, const VertexAttribute<typename PFP::VEC3>& normals, const ATTRIB& colorPerXXX, const FunctorSelect& good = allDarts) ;
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	/**
	 * draw
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	 * @param sh shader use to draw (here only ColorPerVertex)
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	 */
	void draw(Utils::GLSLShader* sh) ;

};

}//end namespace GL2

}//end namespace Algo

}//end namespace Render

}//end namespace CGoGN

#include "Algo/Render/GL2/colorPerFaceRender.hpp"

#endif