text: #ifndef _MPxVertexBufferGenerator
  #define _MPxVertexBufferGenerator
  //-
  // ==========================================================================
  // Copyright (C) 2011 Autodesk, Inc., and/or its licensors.  All
  // rights reserved.
  //
  // The coded instructions, statements, computer programs, and/or related
  // material (collectively the "Data") in these files contain unpublished
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  // licensors,  which is protected by U.S. and Canadian federal copyright law
  // and by international treaties.
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  // The Data may not be disclosed or distributed to third parties or be
  // copied or duplicated, in whole or in part, without the prior written
  // consent of Autodesk.
  //
  // The copyright notices in the Software and this entire statement,
  // including the above license grant, this restriction and the following
  // disclaimer, must be included in all copies of the Software, in whole
  // or in part, and all derivative works of the Software, unless such copies
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  // code generated by a source language processor.
  
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  // ==========================================================================
  //+
  //
  // CLASS: MPxVertexBufferGenerator
  //
  // ****************************************************************************
  
  
  #if defined __cplusplus
  
  // ****************************************************************************
  // INCLUDED HEADER FILES
  
  #include <maya/MStatus.h>
  #include <maya/MHWGeometry.h>
  #include <maya/MDagPath.h>
  #include <maya/MViewport2Renderer.h>
  #include <maya/MComponentDataIndexing.h>
  
  // ****************************************************************************
  // DECLARATIONS
  
  class MString;
  class MUserData;
  
  // ****************************************************************************
  // NAMESPACE
  
  namespace MHWRender
  {
  // ****************************************************************************
  // CLASS DECLARATION (MPxVertexBufferGenerator)
  
  //! \ingroup OpenMayaRender MPx
  //! \brief Base class for user defined vertex buffer generators.
  /*!
  
  Implementations of MPxVertexBufferGenerator must be registered with Maya through
  MDrawRegistry.
  
  MPxVertexGenerators are registered with a unique buffer name.  
  The name signifies the name of the custom stream the generator can produce.  
  When an MPxShaderOverride or custom renderer uses an effect with custom input 
  streams they can provide a unique name in the MVertexBufferDescriptor and 
  a registered MPxVertexBufferGenerator will be used to produce the custom stream
  for a given shape using the incoming requirements held in the MVertexBuffer.
  
  createVertexStream() is called to allow the generator to fill in the missing vertex data
  Access the requirements for the requested stream through vertexBuffer.descriptor().
  Populate the stream using vertexBuffer.acquire() and vertexBuffer.commit().
  */
   // rename MPxVertexBufferTranslator
  class OPENMAYARENDER_EXPORT MPxVertexBufferGenerator
  {
  public:
  
      MPxVertexBufferGenerator();
      virtual ~MPxVertexBufferGenerator();
  
      virtual bool getSourceIndexing(const MObject& object, 
          MComponentDataIndexing& sourceIndexing) const=0;
  
  	virtual bool getSourceStreams(const MObject& object,
  		MStringArray &sourceStreams) const=0;
  
      virtual void createVertexStream(const MObject& object,
          MVertexBuffer& vertexBuffer, const MComponentDataIndexing& targetIndexing, const MComponentDataIndexing& sharedIndexing, const MVertexBufferArray& sourceStreams) const=0;
  
      static	const char*	className();
  };
  
  } // namespace MHWRender
  
  #endif /* __cplusplus */
  #endif /* _MPxVertexBufferGenerator */
  