SoLightAttenuationElement.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  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.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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 * 
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/*
 * Copyright (C) 1990,91   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file defines the SoLightAttenuationElement class.
 |
 |   Author(s)          : Paul S. Strauss
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_LIGHT_ATTENUATION_ELEMENT
#define  _SO_LIGHT_ATTENUATION_ELEMENT
 
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoReplacedElement.h>

 
SoEXTENDER class INVENTOR_API SoLightAttenuationElement : public SoReplacedElement {
 
    SO_ELEMENT_HEADER(SoLightAttenuationElement);
 
  public:
    virtual void        init(SoState *state);

    static void         set(SoState *state, SoNode *node,
                            const SbVec3f &attenuation);

    static const SbVec3f & get(SoState *state);

    static SbVec3f      getDefault()            { return SbVec3f(0., 0., 1.); }

    virtual SoElement   *copyMatchInfo() const;

    virtual bool        matches(const SoElement *elt) const;

    virtual void        print(FILE *fp) const;
 
  SoINTERNAL public:
    static void         initClass();
 
  protected:
    SbVec3f             attenuation;
 
    virtual ~SoLightAttenuationElement();
};
 
#endif /* _SO_LIGHT_ATTENUATION_ELEMENT */