CentralizedControl/Veldrid.Common/Poly2Tri/Triangulation/Sets/ConstrainedPointSet.cs

/* 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
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 */

using System.Collections.Generic;
namespace Veldrid.Common.Poly2Tri.Triangulation.Sets
{
	/*
	 * Extends the PointSet by adding some Constraints on how it will be triangulated<br>
	 * A constraint defines an edge between two points in the set, these edges can not
	 * be crossed. They will be enforced triangle edges after a triangulation.
	 * <p>
	 * 
	 * 
	 * @author Thomas Åhlén, thahlen@gmail.com
	 */
	public class ConstrainedPointSet : PointSet {
		public int[] EdgeIndex { get; private set; }

		public ConstrainedPointSet(List<TriangulationPoint> points, int[] index)
			: base(points) {
			EdgeIndex = index;
		}

		public override TriangulationMode TriangulationMode { get { return TriangulationMode.Constrained; } }

		public override void Prepare(TriangulationContext tcx) {
			base.Prepare(tcx);
			for (int i = 0; i < EdgeIndex.Length; i += 2) {
				// XXX: must change!!
				tcx.NewConstraint(Points[EdgeIndex[i]], Points[EdgeIndex[i + 1]]);
			}
		}
	}
}