MultiLineString.cs
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上传日期:2013-11-09
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- // Copyright 2005, 2006 - Morten Nielsen (www.iter.dk)
- //
- // This file is part of SharpMap.
- // SharpMap 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 of the License, or
- // (at your option) any later version.
- //
- // SharpMap 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 Lesser General Public License for more details.
- // You should have received a copy of the GNU Lesser General Public License
- // along with SharpMap; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- using System;
- using System.Collections.Generic;
- using System.Collections.ObjectModel;
- using System.Text;
- namespace SharpMap.Geometries
- {
- /// <summary>
- /// A MultiLineString is a MultiCurve whose elements are LineStrings.
- /// </summary>
- [Serializable]
- public class MultiLineString : MultiCurve
- {
- private Collection<LineString> _LineStrings;
- /// <summary>
- /// Initializes an instance of a MultiLineString
- /// </summary>
- public MultiLineString()
- {
- _LineStrings = new Collection<LineString>();
- }
- /// <summary>
- /// Collection of <see cref="LineString">LineStrings</see> in the <see cref="MultiLineString"/>
- /// </summary>
- public Collection<LineString> LineStrings
- {
- get { return _LineStrings; }
- set { _LineStrings = value; }
- }
- /// <summary>
- /// Returns an indexed geometry in the collection
- /// </summary>
- /// <param name="index">Geometry index</param>
- /// <returns>Geometry at index</returns>
- public new LineString this[int index]
- {
- get { return _LineStrings[index]; }
- }
- /// <summary>
- /// Returns true if all LineStrings in this MultiLineString is closed (StartPoint=EndPoint for each LineString in this MultiLineString)
- /// </summary>
- public override bool IsClosed
- {
- get
- {
- for (int i = 0; i < _LineStrings.Count;i++)
- if (!_LineStrings[i].IsClosed)
- return false;
- return true;
- }
- }
- /// <summary>
- /// The length of this MultiLineString which is equal to the sum of the lengths of the element LineStrings.
- /// </summary>
- public override double Length
- {
- get {
- double l=0;
- for (int i = 0; i < _LineStrings.Count;i++)
- l += _LineStrings[i].Length;
- return l;
- }
- }
- /// <summary>
- /// If true, then this Geometry represents the empty point set,