/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) 1998-2006 by Systems in Motion.  All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  ("GPL") version 2 as published by the Free Software Foundation.
 *  See the file LICENSE.GPL at the root directory of this source
 *  distribution for additional information about the GNU GPL.
 *
 *  For using Coin with software that can not be combined with the GNU
 *  GPL, and for taking advantage of the additional benefits of our
 *  support services, please contact Systems in Motion about acquiring
 *  a Coin Professional Edition License.
 *
 *  See http://www.coin3d.org/ for more information.
 *
 *  Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY.
 *  http://www.sim.no/  sales@sim.no  coin-support@coin3d.org
 *
\**************************************************************************/

/*!
  \class SoBumpMapCoordinate SoBumpMapCoordinate.h Inventor/nodes/SoBumpMapCoordinate.h
  \brief The SoBumpMapCoordinate class is a node for providing bump map coordinates to shape nodes.
  \ingroup nodes

  When encountering nodes of this type during traversal, the
  coordinates it contains will be put on the state stack for later use
  by shape nodes. The bump map coordinates can be used to specify
  explicit coordinates for a bump map. The SoBumpMap node is used to
  specify a bump map for the shape nodes.

  Note that an SoBumpMapCoordinate node will \e replace the bump map
  coordinates already present in the state (if any).

  Also note that since the indexed shape nodes have no
  bumpMapCoordIndex field, the textureCoordIndex field will be used
  for selecting bump map coordinate indices. You can set the bump map
  coordinate binding using the SoTextureCoordinateBinding node. Bump
  map coordinates must therefore have the same binding as the texture
  coordinates for texture unit 0.

  If you supply no bump map coordinates for a shape, the texture
  coordinates for texture unit 0 will be used.

  <b>FILE FORMAT/DEFAULTS:</b>
  \code
    BumpMapCoordinate {
        point [  ]
    }
  \endcode

  \since Coin 2.2
*/

#include <Inventor/nodes/SoBumpMapCoordinate.h>
#include <Inventor/nodes/SoSubNodeP.h>

#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoCallbackAction.h>
#include <Inventor/actions/SoRayPickAction.h>
#include <Inventor/elements/SoBumpMapCoordinateElement.h>


/*!
  \var SoMFVec3f SoBumpMapCoordinate::point
  Set of 2D points. Contains no points by default.
*/


// *************************************************************************

SO_NODE_SOURCE(SoBumpMapCoordinate);

/*!
  Constructor.
*/
SoBumpMapCoordinate::SoBumpMapCoordinate(void)
{
  SO_NODE_INTERNAL_CONSTRUCTOR(SoBumpMapCoordinate);

  SO_NODE_ADD_FIELD(point, (0.0f, 0.0f));
  this->point.setNum(0);
  this->point.setDefault(TRUE);
}

/*!
  Destructor.
*/
SoBumpMapCoordinate::~SoBumpMapCoordinate()
{
}

// Doc from superclass.
void
SoBumpMapCoordinate::initClass(void)
{
  SO_NODE_INTERNAL_INIT_CLASS(SoBumpMapCoordinate, SO_FROM_COIN_2_2);

  SO_ENABLE(SoGLRenderAction, SoBumpMapCoordinateElement);
  SO_ENABLE(SoCallbackAction, SoBumpMapCoordinateElement);
  SO_ENABLE(SoPickAction, SoBumpMapCoordinateElement);
}

// Doc from superclass.
void
SoBumpMapCoordinate::doAction(SoAction * action)
{
  SoBumpMapCoordinateElement::set(action->getState(), this,
                                  point.getNum(), point.getValues(0));
}

// Doc from superclass.
void
SoBumpMapCoordinate::GLRender(SoGLRenderAction * action)
{
  SoBumpMapCoordinateElement::set(action->getState(), this,
                                  point.getNum(), point.getValues(0));
}

// Doc from superclass.
void
SoBumpMapCoordinate::callback(SoCallbackAction * action)
{
  SoBumpMapCoordinate::doAction((SoAction*)action);
}

// Doc from superclass.
void
SoBumpMapCoordinate::pick(SoPickAction * action)
{
  SoBumpMapCoordinate::doAction((SoAction*) action);
}


