svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / cts / gt2 / CoordTrans.java @ 101
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/*
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* Creado el 07-ago-2004
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*/
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package org.cresques.cts.gt2; |
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import java.awt.geom.Point2D; |
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import org.cresques.cts.ICoordTrans; |
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import org.cresques.cts.IProjection; |
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import org.geotools.ct.CannotCreateTransformException; |
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import org.geotools.ct.CoordinateTransformation; |
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import org.geotools.ct.CoordinateTransformationFactory; |
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import org.geotools.ct.MathTransform; |
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import org.geotools.ct.TransformException; |
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import org.geotools.pt.CoordinatePoint; |
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import org.geotools.pt.MismatchedDimensionException; |
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/**
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* Transforma coordenadas entre dos sistemas
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* @see org.creques.cts.CoordSys
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es>
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*/
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public class CoordTrans implements ICoordTrans { |
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private CoordinateTransformationFactory trFactory = CoordinateTransformationFactory.getDefault();
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private CoordinateTransformation tr = null; |
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private MathTransform mt = null, mt2 = null, mt3 = null, mtDatum = null; |
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private CoordSys from = null, to = null; |
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public CoordTrans(CoordSys from, CoordSys to) {
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this.from = from;
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this.to = to;
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// Si los dos CoordSys son proyectados, entonces hay
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// que hacer dos transformaciones (pasar por geogr?ficas)
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// Si hay cambio de datum son 3 las transformaciones
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try {
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if (from.getDatum() != to.getDatum()) {
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tr = trFactory.createFromCoordinateSystems(from.toGeo().getCS(), to.toGeo().getCS()); |
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mtDatum = tr.getMathTransform(); |
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} |
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if (from.projCS != null && to.projCS != null) { |
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CoordSys geogcs = from.toGeo(); |
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tr = trFactory.createFromCoordinateSystems(from.getCS(), geogcs.getCS()); |
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mt = tr.getMathTransform(); |
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if (mtDatum != null) |
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mt2 = mtDatum; |
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geogcs = to.toGeo(); |
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tr = trFactory.createFromCoordinateSystems(geogcs.getCS(), to.getCS()); |
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if (mt2 == null) |
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mt2 = tr.getMathTransform(); |
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else
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mt3 = tr.getMathTransform(); |
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} else {
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if (from.projCS == null) |
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mt = mtDatum; |
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tr = trFactory.createFromCoordinateSystems(from.getCS(), to.getCS()); |
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if (mt == null) { |
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mt = tr.getMathTransform(); |
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if (mtDatum != null) |
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mt2 = mtDatum; |
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} else
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mt2 = tr.getMathTransform(); |
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} |
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} catch (CannotCreateTransformException e) {
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// TODO Bloque catch generado autom?ticamente
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e.printStackTrace(); |
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} |
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} |
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public IProjection getPOrig() { return from; } |
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public IProjection getPDest() { return to; } |
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public ICoordTrans getInverted() {
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ICoordTrans cti = null;
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return cti;
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} |
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public Point2D convert(Point2D ptOrig, Point2D ptDest) { |
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CoordinatePoint pt1 = new CoordinatePoint(ptOrig);
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CoordinatePoint pt2 = new CoordinatePoint(0D,0D); |
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ptDest = null;
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try {
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mt.transform(pt1, pt2); |
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ptDest = pt2.toPoint2D(); |
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if (mt2 != null) { |
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mt2.transform(pt2, pt1); |
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ptDest = pt1.toPoint2D(); |
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if (mt3 != null) { |
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mt3.transform(pt1, pt2); |
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ptDest = pt2.toPoint2D(); |
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} |
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} |
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} catch (MismatchedDimensionException e) {
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// TODO Bloque catch generado autom?ticamente
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e.printStackTrace(); |
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} catch (TransformException e) {
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// TODO Bloque catch generado autom?ticamente
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e.printStackTrace(); |
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} |
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return ptDest;
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} |
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public String toString() { |
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return tr.toString();
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} |
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} |