// OpenCSG - library for image-based CSG rendering for OpenGL
// Copyright (C) 2002-2011, Florian Kirsch,
// Hasso-Plattner-Institute at the University of Potsdam, Germany
//
// This library is free software; you can redistribute it and/or 
// modify it under the terms of the GNU General Public License, 
// Version 2, as published by the Free Software Foundation.
// As a special exception, you have permission to link this library
// with the CGAL library and distribute executables.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License 
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

#include "opencsgConfig.h"
#include "area.h"
#include "openglHelper.h"

namespace OpenCSG {

    NDCVolume::operator PCArea() const {
        using OpenGL::canvasPos;

        double widthPixels  = 0.5 * (canvasPos[2] - canvasPos[0]);
        double heightPixels = 0.5 * (canvasPos[3] - canvasPos[1]);

        int iminx = static_cast<int>( (minx + 1.0) * widthPixels );
        int imaxx = static_cast<int>( (maxx + 1.0) * widthPixels );
        int iminy = static_cast<int>( (miny + 1.0) * heightPixels );
        int imaxy = static_cast<int>( (maxy + 1.0) * heightPixels );  
    
        return PCArea(iminx, iminy, imaxx, imaxy); 
    }

} // namespace OpenCSG

