001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/model/csct/ct/ConcatenedTransformDirect2D.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/exse/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 It has been implemented within SEAGIS - An OpenSource implementation of OpenGIS specification
012 (C) 2001, Institut de Recherche pour le D�veloppement (http://sourceforge.net/projects/seagis/)
013 SEAGIS Contacts: Surveillance de l'Environnement Assist�e par Satellite
014 Institut de Recherche pour le D�veloppement / US-Espace
015 mailto:seasnet@teledetection.fr
016
017
018 This library is free software; you can redistribute it and/or
019 modify it under the terms of the GNU Lesser General Public
020 License as published by the Free Software Foundation; either
021 version 2.1 of the License, or (at your option) any later version.
022
023 This library is distributed in the hope that it will be useful,
024 but WITHOUT ANY WARRANTY; without even the implied warranty of
025 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
026 Lesser General Public License for more details.
027
028 You should have received a copy of the GNU Lesser General Public
029 License along with this library; if not, write to the Free Software
030 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
031
032 Contact:
033
034 Andreas Poth
035 lat/lon GmbH
036 Aennchenstr. 19
037 53115 Bonn
038 Germany
039 E-Mail: poth@lat-lon.de
040
041 Klaus Greve
042 Department of Geography
043 University of Bonn
044 Meckenheimer Allee 166
045 53115 Bonn
046 Germany
047 E-Mail: klaus.greve@uni-bonn.de
048
049
050 ---------------------------------------------------------------------------*/
051 package org.deegree.model.csct.ct;
052
053 // Geometry
054 import java.awt.Shape;
055 import java.awt.geom.Point2D;
056
057 import org.deegree.model.csct.pt.Matrix;
058
059
060 /**
061 * Concatened transform where both transforms are two-dimensional.
062 *
063 * @version 1.0
064 * @author Martin Desruisseaux
065 */
066 final class ConcatenedTransformDirect2D extends ConcatenedTransformDirect implements MathTransform2D
067 {
068 /**
069 * Serial number for interoperability with different versions.
070 */
071 private static final long serialVersionUID = 6009454091075588885L;
072
073 /**
074 * The first math transform. This field is identical
075 * to {@link ConcatenedTransform#transform1}. Only
076 * the type is different.
077 */
078 private final MathTransform2D transform1;
079
080 /**
081 * The second math transform. This field is identical
082 * to {@link ConcatenedTransform#transform1}. Only
083 * the type is different.
084 */
085 private final MathTransform2D transform2;
086
087 /**
088 * Construct a concatenated transform.
089 */
090 public ConcatenedTransformDirect2D(final MathTransformFactory provider, final MathTransform2D transform1, final MathTransform2D transform2)
091 {
092 super(provider, transform1, transform2);
093 this.transform1 = transform1;
094 this.transform2 = transform2;
095 }
096
097 /**
098 * Check if transforms are compatibles
099 * with this implementation.
100 */
101 protected boolean isValid()
102 {return super.isValid() && getDimSource()==2 && getDimTarget()==2;}
103
104 /**
105 * Transforms the specified <code>ptSrc</code>
106 * and stores the result in <code>ptDst</code>.
107 */
108 public Point2D transform(final Point2D ptSrc, Point2D ptDst) throws TransformException
109 {
110 ptDst = transform1.transform(ptSrc, ptDst);
111 return transform2.transform(ptDst, ptDst);
112 }
113
114 /**
115 * Transform the specified shape.
116 */
117 public Shape createTransformedShape(final Shape shape) throws TransformException
118 {
119 return transform2.createTransformedShape(transform1.createTransformedShape(shape));
120 }
121
122 /**
123 * Gets the derivative of this transform at a point.
124 *
125 * @param point The coordinate point where to evaluate the derivative.
126 * @return The derivative at the specified point (never <code>null</code>).
127 * @throws TransformException if the derivative can't be evaluated at the specified point.
128 */
129 public Matrix derivative(final Point2D point) throws TransformException
130 {
131 final Matrix matrix1 = transform1.derivative(point);
132 final Matrix matrix2 = transform2.derivative(transform1.transform(point, null));
133 matrix2.mul(matrix1);
134 return matrix2;
135 }
136 }