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 / utils / PointGetAngle.java @ 40559
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| 1 | 40559 | jjdelcerro | /**
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| 2 | * gvSIG. Desktop Geographic Information System.
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| 3 | 40435 | jjdelcerro | *
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| 4 | 40559 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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| 5 | *
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| 6 | 40435 | jjdelcerro | * This program is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU General Public License
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| 8 | 40559 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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| 9 | 40435 | jjdelcerro | * of the License, or (at your option) any later version.
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| 10 | 40559 | jjdelcerro | *
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| 11 | 40435 | jjdelcerro | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | 40559 | jjdelcerro | *
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| 16 | 40435 | jjdelcerro | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | 40559 | jjdelcerro | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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| 19 | 40435 | jjdelcerro | * MA 02110-1301, USA.
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| 20 | 40559 | jjdelcerro | *
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| 21 | * For any additional information, do not hesitate to contact us
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| 22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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| 23 | 40435 | jjdelcerro | */
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| 24 | /*
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| 25 | * AUTHORS (In addition to CIT):
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| 26 | * 2009 {Iver T.I.} {Task}
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| 27 | */
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| 28 | |||
| 29 | package org.gvsig.fmap.geom.operation.utils; |
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| 30 | |||
| 31 | import org.gvsig.fmap.geom.Geometry; |
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| 32 | import org.gvsig.fmap.geom.GeometryLocator; |
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| 33 | import org.gvsig.fmap.geom.GeometryManager; |
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| 34 | import org.gvsig.fmap.geom.Geometry.TYPES; |
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| 35 | import org.gvsig.fmap.geom.operation.GeometryOperation; |
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| 36 | import org.gvsig.fmap.geom.operation.GeometryOperationContext; |
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| 37 | import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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| 38 | import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException; |
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| 39 | import org.gvsig.fmap.geom.operation.distance.PointDistance; |
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| 40 | import org.gvsig.fmap.geom.primitive.Point; |
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| 41 | import org.gvsig.fmap.geom.type.GeometryType; |
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| 42 | import org.gvsig.tools.locator.LocatorException; |
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| 43 | |||
| 44 | /**
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| 45 | * @author <a href="mailto:jpiera@gvsig.org">Jorge Piera</a>
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| 46 | */
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| 47 | public class PointGetAngle extends GeometryOperation{ |
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| 48 | public static final String NAME = "getAngle"; |
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| 49 | public static final int CODE = GeometryLocator.getGeometryManager(). |
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| 50 | getGeometryOperationCode(NAME); |
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| 51 | |||
| 52 | /* (non-Javadoc)
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| 53 | * @see org.gvsig.fmap.geom.operation.GeometryOperation#getOperationIndex()
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| 54 | */
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| 55 | public int getOperationIndex() { |
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| 56 | return CODE;
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| 57 | } |
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| 58 | |||
| 59 | /* (non-Javadoc)
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| 60 | * @see org.gvsig.fmap.geom.operation.GeometryOperation#invoke(org.gvsig.fmap.geom.Geometry, org.gvsig.fmap.geom.operation.GeometryOperationContext)
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| 61 | */
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| 62 | public Object invoke(Geometry geom, GeometryOperationContext ctx) |
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| 63 | throws GeometryOperationException {
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| 64 | |||
| 65 | Geometry geom2 = (Geometry)ctx.getAttribute("geom");
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| 66 | GeometryType geomType2 = geom2.getGeometryType(); |
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| 67 | |||
| 68 | if ((TYPES.POINT != geom.getType()) && TYPES.POINT != geomType2.getType()){
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| 69 | throw new UnsupportedOperationException("The distance only can be execudet between two points"); |
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| 70 | } |
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| 71 | |||
| 72 | Point start = (Point)geom; |
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| 73 | Point end = (Point)geom; |
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| 74 | |||
| 75 | double distance;
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| 76 | try {
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| 77 | distance = ((Double)GeometryLocator.getGeometryManager().invokeOperation(PointDistance.CODE, geom, ctx)).doubleValue();
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| 78 | } catch (LocatorException e) {
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| 79 | throw new GeometryOperationException(e); |
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| 80 | } catch (GeometryOperationNotSupportedException e) {
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| 81 | throw new GeometryOperationException(e); |
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| 82 | } |
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| 83 | |||
| 84 | double angle = Math.acos((end.getX() - start.getX()) / distance); |
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| 85 | |||
| 86 | if (start.getY() > end.getY()) {
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| 87 | angle = -angle; |
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| 88 | } |
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| 89 | |||
| 90 | if (angle < 0) { |
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| 91 | angle += (2 * Math.PI); |
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| 92 | } |
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| 93 | |||
| 94 | return new Double(angle); |
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| 95 | } |
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| 96 | |||
| 97 | } |