svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.geometry / org.gvsig.fmap.geometry.operation / src / main / java / org / gvsig / fmap / geom / operation / perpendicular / Perpendicular.java @ 40559
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.geom.operation.perpendicular; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
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import org.gvsig.fmap.geom.GeometryLocator; |
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import org.gvsig.fmap.geom.GeometryManager; |
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import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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import org.gvsig.fmap.geom.operation.GeometryOperation; |
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import org.gvsig.fmap.geom.operation.GeometryOperationContext; |
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import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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import org.gvsig.fmap.geom.primitive.Point; |
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/**
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* Gets a couple of points that defines a line that is perpendicular to other line
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* and intersects with a point.
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* @author gvSIG Team
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* @version $Id$
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*
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*/
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public class Perpendicular extends GeometryOperation{ |
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public static final String NAME = "perpendicular"; |
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private static GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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public static final int CODE = geomManager.getGeometryOperationCode(NAME); |
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public Object invoke(Geometry geom, GeometryOperationContext ctx) |
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throws GeometryOperationException {
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Point point1 = (Point)geom; |
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Point point2 = (Point)ctx.getAttribute(PerpendicularOperationContext.SECOND_POINT); |
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Point perpendicularPoint = (Point)ctx.getAttribute(PerpendicularOperationContext.PERPENDICULAR_POINT); |
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if ((point2.getY() - point1.getY()) == 0) { |
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try {
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return new Point[] { |
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geomManager.createPoint(perpendicularPoint.getX(), 0, SUBTYPES.GEOM2D),
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geomManager.createPoint(perpendicularPoint.getX(), 1, SUBTYPES.GEOM2D)
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}; |
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} catch (CreateGeometryException e) {
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throw new GeometryOperationException(e); |
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} |
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} |
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//Pendiente de la recta perpendicular
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double m = (point1.getX() - point2.getX()) / (point2.getY() - point1.getY());
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//b de la funcion de la recta perpendicular
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double b = perpendicularPoint.getY() - (m * perpendicularPoint.getX());
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//Obtenemos un par de puntos
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try {
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return new Point[] { |
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geomManager.createPoint(0, (m * 0) + b, SUBTYPES.GEOM2D), |
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geomManager.createPoint(1000, (m * 1000) + b, SUBTYPES.GEOM2D) |
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}; |
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} catch (CreateGeometryException e) {
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throw new GeometryOperationException(e); |
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} |
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} |
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public int getOperationIndex() { |
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return CODE;
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} |
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} |