text: //////////////////////////////////////////////////////////////////////////
  //
  //  Copyright (c) 2016, Image Engine Design Inc. All rights reserved.
  //
  //  Redistribution and use in source and binary forms, with or without
  //  modification, are permitted provided that the following conditions are
  //  met:
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  //        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.
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  //      * Neither the name of John Haddon nor the names of
  //        any other contributors to this software may be used to endorse or
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  //  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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  //////////////////////////////////////////////////////////////////////////
  
  #ifndef GAFFERARNOLD_ARNOLDDISPLACEMENT_H
  #define GAFFERARNOLD_ARNOLDDISPLACEMENT_H
  
  #include "GafferScene/Shader.h"
  
  #include "GafferArnold/TypeIds.h"
  
  namespace GafferArnold
  {
  
  /// \todo It's slightly awkward that this inherits from Shader, because
  /// it inherits namePlug(), typePlug() and parametersPlug(), none of
  /// which are needed. We should consider creating a fully abstract Shader
  /// base class and renaming the current Shader class to StandardShader,
  /// or defining an even more general Assignable base class which both
  /// Shader and ArnoldDisplacement can inherit from.
  class ArnoldDisplacement : public GafferScene::Shader
  {
  
  	public :
  
  		ArnoldDisplacement( const std::string &name=defaultName<ArnoldDisplacement>() );
  		virtual ~ArnoldDisplacement();
  
  		IE_CORE_DECLARERUNTIMETYPEDEXTENSION( GafferArnold::ArnoldDisplacement, ArnoldDisplacementTypeId, GafferScene::Shader );
  
  		Gaffer::Plug *mapPlug();
  		const Gaffer::Plug *mapPlug() const;
  
  		Gaffer::FloatPlug *heightPlug();
  		const Gaffer::FloatPlug *heightPlug() const;
  
  		Gaffer::FloatPlug *paddingPlug();
  		const Gaffer::FloatPlug *paddingPlug() const;
  
  		Gaffer::FloatPlug *zeroValuePlug();
  		const Gaffer::FloatPlug *zeroValuePlug() const;
  
  		Gaffer::BoolPlug *autoBumpPlug();
  		const Gaffer::BoolPlug *autoBumpPlug() const;
  
  		Gaffer::Plug *outPlug();
  		const Gaffer::Plug *outPlug() const;
  
  		virtual void attributesHash( IECore::MurmurHash &h ) const;
  		virtual IECore::ConstCompoundObjectPtr attributes() const;
  
  	protected :
  
  		virtual bool acceptsInput( const Gaffer::Plug *plug, const Gaffer::Plug *inputPlug ) const;
  
  	private :
  
  		static size_t g_firstPlugIndex;
  
  };
  
  IE_CORE_DECLAREPTR( ArnoldDisplacement )
  
  } // namespace GafferArnold
  
  #endif // GAFFERARNOLD_ARNOLDDISPLACEMENT_H
  