MultiCurve.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.Text;
- namespace SharpMap.Geometries
- {
- /// <summary>
- /// A MultiCurve is a one-dimensional GeometryCollection whose elements are Curves
- /// </summary>
- public abstract class MultiCurve : GeometryCollection
- {
- /// <summary>
- /// The inherent dimension of this Geometry object, which must be less than or equal to the coordinate dimension.
- /// </summary>
- public override int Dimension
- {
- get { return 1; }
- }
- /// <summary>
- /// Returns true if this MultiCurve is closed (StartPoint=EndPoint for each curve in this MultiCurve)
- /// </summary>
- public abstract bool IsClosed { get; }
- /// <summary>
- /// The Length of this MultiCurve which is equal to the sum of the lengths of the element Curves.
- /// </summary>
- public abstract double Length { get; }
- /// <summary>
- /// Returns the number of geometries in the collection.
- /// </summary>
- public new abstract int NumGeometries { get; }
- /// <summary>
- /// Returns an indexed geometry in the collection
- /// </summary>
- /// <param name="N">Geometry index</param>
- /// <returns>Geometry at index N</returns>
- public new abstract Geometry Geometry(int N);
- }
- }