DefaultObjectMarker.cc

/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
 *      Copyright (C) 2001-2009 by Computer Graphics Group, RWTH Aachen      *
 *                           www.openflipper.org                             *
 *                                                                           *
 *---------------------------------------------------------------------------*
 *  This file is part of OpenFlipper.                                        *
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 *  OpenFlipper 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 3 of           *
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 *  following exceptions:                                                    *
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 *  If other files instantiate templates or use macros                       *
 *  or inline functions from this file, or you compile this file and         *
 *  link it with other files to produce an executable, this file does        *
 *  not by itself cause the resulting executable to be covered by the        *
 *  GNU Lesser General Public License. This exception does not however       *
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 *  covered by the GNU Lesser General Public License.                        *
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\*===========================================================================*/

/*===========================================================================*\
 *                                                                           *
 *   $Revision: 83 $                                                         *
 *   $Author: moebius $                                                      *
 *   $Date: 2009-02-27 17:31:45 +0100 (Fr, 27. Feb 2009) $                   *
 *                                                                           *
\*===========================================================================*/

#include <OpenFlipper/common/Types.hh>
#include <OpenFlipper/common/BaseObjectData.hh>
#include "DefaultObjectMarker.hh"

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

const ACG::Vec4f base_color (0.6,0.6,0.6,1.0);
const ACG::Vec4f source_color (0.6,0.6,1.0,1.0);
const ACG::Vec4f target_color (1.0,1.0,1.0,1.0);
const ACG::Vec4f source_target_color (0.6,1.0,1.0,1.0);

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

bool DefaultObjectMarker::stencilRefForObject(BaseObjectData * _obj, GLuint & _reference)
{
  if (!_obj->target() && !_obj->source())
  {
    _reference = 1;
    return true;
  }
  else if (!_obj->target() && _obj->source())
  {
    _reference = 2;
    return true;
  }
  else if (_obj->target() && !_obj->source())
  {
    _reference = 3;
    return true;
  }
  else if (_obj->target() && _obj->source())
  {
    _reference = 4;
    return true;
  }

  return false;
}

bool DefaultObjectMarker::blendForStencilRefNumber(GLuint _reference, GLenum & _src, GLenum & _dst, ACG::Vec4f & _color)
{
  _src = GL_ZERO;
  _dst = GL_SRC_COLOR;

  switch (_reference)
  {
    case 1:
      _color = base_color;
      return true;
    case 2:
      _color = source_color;
      return true;
    case 3:
      _color = target_color;
      return true;
    case 4:
      _color = source_target_color;
      return true;
    default:
      return false;
  }
  return false;
}