netDxf/Entities/MeshEdge.cs

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#region netDxf, Copyright(C) 2014 Daniel Carvajal, Licensed under LGPL.

//                        netDxf library
// Copyright (C) 2013 Daniel Carvajal (haplokuon@gmail.com)
// 
// This library 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 2.1 of the License, or (at your option) any later version.
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 

#endregion

using System;
using System.Threading;

namespace netDxf.Entities
{
    /// <summary>
    /// Represents an edge of a <see cref="EntityObject">mesh</see> entity.
    /// </summary>
    public class MeshEdge :
        ICloneable
    {

        #region private fields

        private int startVertexIndex;
        private int endVertexIndex;
        private double crease;

        #endregion

        #region constructor

        /// <summary>
        /// Initializes a new instance of the <c>MeshEdge</c> class.
        /// </summary>
        /// <param name="startVertexIndex">The edge start vertex index.</param>
        /// <param name="endVertexIndex">The edge end vertex index.</param>
        /// <param name="crease">The highest smoothing level at which the crease is retained.</param>
        public MeshEdge(int startVertexIndex, int endVertexIndex, double crease = 0.0)
        {
            if (startVertexIndex < 0)
                throw (new ArgumentOutOfRangeException("startVertexIndex", startVertexIndex, "The vertex index must be positive."));
            this.startVertexIndex = startVertexIndex;

            if (endVertexIndex < 0)
                throw (new ArgumentOutOfRangeException("endVertexIndex", endVertexIndex, "The vertex index must be positive."));
            this.endVertexIndex = endVertexIndex;
            this.crease = crease < 0.0 ? -1.0 : crease;