- // Copyright 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.CoordinateSystems.Transformations
- {
- internal class ConcatenatedTransform : MathTransform
- {
- protected IMathTransform _inverse;
- public ConcatenatedTransform()
- : this(new List<ICoordinateTransformation>())
- {
- }
- public ConcatenatedTransform(List<ICoordinateTransformation> transformlist)
- {
- _CoordinateTransformationList = transformlist;
- }
- private List<ICoordinateTransformation> _CoordinateTransformationList;
- public List<ICoordinateTransformation> CoordinateTransformationList
- {
- get { return _CoordinateTransformationList; }
- set
- {
- _CoordinateTransformationList = value;
- _inverse = null;
- }
- }
- public override SharpMap.Geometries.Point Transform(SharpMap.Geometries.Point point)
- {
- if (point is SharpMap.Geometries.Point3D)
- {
- SharpMap.Geometries.Point pnt = (point as SharpMap.Geometries.Point3D).Clone();
- foreach (ICoordinateTransformation ct in _CoordinateTransformationList)
- pnt = ct.MathTransform.Transform(pnt);
- return pnt;
- }
- else
- {
- SharpMap.Geometries.Point pnt = point.Clone();
- foreach (ICoordinateTransformation ct in _CoordinateTransformationList)
- pnt = ct.MathTransform.Transform(pnt);
- return pnt;
- }
- }
- public override Collection<SharpMap.Geometries.Point> TransformList(Collection<SharpMap.Geometries.Point> points)
- {
- Collection<SharpMap.Geometries.Point> pnts = new Collection<SharpMap.Geometries.Point>(points);
- foreach (ICoordinateTransformation ct in _CoordinateTransformationList)
- pnts = ct.MathTransform.TransformList(pnts);
- return pnts;
- }
- /// <summary>
- /// Returns the inverse of this conversion.
- /// </summary>
- /// <returns>IMathTransform that is the reverse of the current conversion.</returns>
- public override IMathTransform Inverse()
- {
- if (_inverse == null)
- {
- _inverse = new ConcatenatedTransform(_CoordinateTransformationList);
- _inverse.Invert();
- }
- return _inverse;
- }
- /// <summary>
- /// Reverses the transformation
- /// </summary>
- public override void Invert()
- {
- _CoordinateTransformationList.Reverse();
- foreach (ICoordinateTransformation ic in _CoordinateTransformationList)
- ic.MathTransform.Invert();
- }
- public override string WKT
- {
- get { throw new Exception("The method or operation is not implemented."); }
- }
- public override string XML
- {
- get { throw new Exception("The method or operation is not implemented."); }
- }
- }
- }