StencilRefNode.cc

/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
 *      Copyright (C) 2001-2009 by Computer Graphics Group, RWTH Aachen      *
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/*===========================================================================*\
 *                                                                           *
 *   $Revision: 83 $                                                         *
 *   $Author: moebius $                                                      *
 *   $Date: 2009-02-27 17:31:45 +0100 (Fr, 27. Feb 2009) $                   *
 *                                                                           *
\*===========================================================================*/




//=============================================================================
//
//  CLASS StencilRefNode - IMPLEMENTATION
//
//=============================================================================


//== INCLUDES =================================================================


#include "StencilRefNode.hh"


//== NAMESPACES ===============================================================


namespace ACG {
namespace SceneGraph {


//== IMPLEMENTATION ==========================================================


StencilRefNode::StencilRefNode (BaseNode*          _parent,
                                const std::string& _name)
  : BaseNode(_parent, _name),
  reference_ (0)
{}

//----------------------------------------------------------------------------

StencilRefNode::StencilRefNode (BaseNode*          _parent,
                                BaseNode*          _child,
                                const std::string& _name)
  : BaseNode(_parent, _child, _name),
  reference_ (0)
{}

//----------------------------------------------------------------------------

void StencilRefNode::enter(GLState& _state, unsigned int _drawmode)
{
  glPushAttrib (GL_STENCIL_BUFFER_BIT);
  glStencilFunc (GL_ALWAYS, reference_, ~0);
  glStencilOp (GL_KEEP, GL_KEEP, GL_REPLACE);
}

//----------------------------------------------------------------------------

void StencilRefNode::leave(GLState& _state, unsigned int _drawmode)
{
  glPopAttrib ();
}

//----------------------------------------------------------------------------

void StencilRefNode::enterPick(GLState& /*_state*/ ,
                           PickTarget /*_target*/,
                           unsigned int /*_drawMode*/ ) {

}

//----------------------------------------------------------------------------

void StencilRefNode::leavePick(GLState& /*_state*/,
                           PickTarget /*_target*/,
                           unsigned int /*_drawMode*/ ) {
}

void StencilRefNode::setReference(GLuint _ref)
{
  reference_ = _ref;
}

//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================