X3DNormalNode.h

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//    Copyright 2004, SenseGraphics AB
//
//    This file is part of H3D API.
//
//    H3D API 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 2 of the License, or
//    (at your option) any later version.
//
//    H3D API 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 H3D API; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    A commercial license is also available. Please contact us at 
//    www.sensegraphics.com for more information.
//
//
//
#ifndef __X3DNORMALNODE_H__
#define __X3DNORMALNODE_H__

#include "X3DGeometricPropertyNode.h"

namespace H3D {

  class H3DAPI_API X3DNormalNode : public X3DGeometricPropertyNode {
  public:
    
    X3DNormalNode( Inst< SFNode>  _metadata = 0 );

    // Gets the normal of a given index.
    virtual Vec3f getNormal( int index ) = 0;

    virtual void render( int index ) {}

    virtual void renderArray() {}

    virtual void disableArray(){}
    
    virtual string defaultXMLContainerField() {
      return "normal";
    }

    virtual unsigned int nrAvailableNormals() = 0; 
  };
}

#endif

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