eqPly/vertexBufferLeaf.h

/* Copyright (c) 2007, Tobias Wolf <twolf@access.unizh.ch>
 *           2008-2012, Stefan Eilemann <eile@equalizergraphics.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Eyescale Software GmbH nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  
    
    Header file of the VertexBufferLeaf class.
*/


#ifndef MESH_VERTEXBUFFERLEAF_H
#define MESH_VERTEXBUFFERLEAF_H


#include "vertexBufferBase.h"


namespace mesh 
{
    /*  The class for kd-tree leaf nodes.  */
    class VertexBufferLeaf : public VertexBufferBase
    {
    public:
        VertexBufferLeaf( VertexBufferData& data )
            : _globalData( data ), _vertexStart( 0 ),
              _indexStart( 0 ), _indexLength( 0 ) {}
        virtual ~VertexBufferLeaf() {}
        
        virtual void draw( VertexBufferState& state ) const;
        virtual Index getNumberOfVertices() const { return _indexLength; }
        
    protected:
        virtual void toStream( std::ostream& os );
        virtual void fromMemory( char** addr, VertexBufferData& globalData );
        
        virtual void setupTree( VertexData& data, const Index start,
                                const Index length, const Axis axis,
                                const size_t depth,
                                VertexBufferData& globalData );
        virtual const BoundingSphere& updateBoundingSphere();
        virtual void updateRange();
        
    private:
        void setupRendering( VertexBufferState& state, GLuint* data ) const;
        void renderImmediate( VertexBufferState& state ) const;
        void renderDisplayList( VertexBufferState& state ) const;
        void renderBufferObject( VertexBufferState& state ) const;
        
        VertexBufferData&   _globalData;
        BoundingBox         _boundingBox;
        Index               _vertexStart;
        Index               _indexStart;
        Index               _indexLength;
        ShortIndex          _vertexLength;
        friend class eqPly::VertexBufferDist;
    };
    
    
}


#endif // MESH_VERTEXBUFFERLEAF_H