/* Poly2Tri
 * Copyright (c) 2009-2010, Poly2Tri Contributors
 * http://code.google.com/p/poly2tri/
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * * 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.
 * * Neither the name of Poly2Tri 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 OWNER 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
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

namespace Poly2Tri.Triangulation.Delaunay.Sweep
{
    public class DTSweepConstraint : TriangulationConstraint
    {
        /// <summary>
        /// Give two points in any order. Will always be ordered so
        /// that q.y > p.y and q.x > p.x if same y value 
        /// </summary>
        public DTSweepConstraint(TriangulationPoint p1, TriangulationPoint p2)
        {
            P = p1;
            Q = p2;
            if (p1.Y > p2.Y)
            {
                Q = p1;
                P = p2;
            }
            else if (p1.Y == p2.Y)
            {
                if (p1.X > p2.X)
                {
                    Q = p1;
                    P = p2;
                }
                else if (p1.X == p2.X)
                {
                    //                logger.info( "Failed to create constraint {}={}", p1, p2 );
                    //                throw new DuplicatePointException( p1 + "=" + p2 );
                    //                return;
                }
            }
            Q.AddEdge(this);
        }
    }
}