SelectionObjectMarker.cc

/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openflipper.org                            *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenFlipper.                                         *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
 *                                                                           *
 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
*                                                                            *
\*===========================================================================*/

/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
\*===========================================================================*/

#include <OpenFlipper/common/Types.hh>
#include "SelectionObjectMarker.hh"

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

const ACG::Vec4f disabled_color (0.4f,0.4f,0.4f,1.f);
const ACG::Vec4f selected_color (0.f,1.f,0.f,0.5f);

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

bool SelectionObjectMarker::stencilRefForObject(BaseObjectData * _obj, GLuint & _reference)
{
  if (_obj->flag("vsi_objectId_disabled"))
  {
    _reference = 1;
    return true;
  }
  else if (_obj->flag("vsi_objectId_selected"))
  {
    _reference = 2;
    return true;
  }

  return false;
}

bool SelectionObjectMarker::blendForStencilRefNumber(GLuint _reference, GLenum & _src, GLenum & _dst, ACG::Vec4f & _color)
{
  switch (_reference)
  {
    case 1:
      _src = GL_ZERO;
      _dst = GL_SRC_COLOR;
      _color = disabled_color;
      return true;
    case 2:
      _src = GL_SRC_ALPHA;
      _dst = GL_ONE_MINUS_SRC_ALPHA;
      _color = selected_color;
      return true;
    default:
      return false;
  }
  return false;
}