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 / isCCW / IsCCW.java @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * 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 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * 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 | *
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16 | * 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 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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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 | */
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24 | 40435 | jjdelcerro | /* gvSIG. Geographic Information System of the Valencian Government
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25 | *
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26 | * Copyright (C) 2007-2008 Infrastructures and Transports Department
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27 | * of the Valencian Government (CIT)
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28 | *
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29 | * This program is free software; you can redistribute it and/or
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30 | * modify it under the terms of the GNU General Public License
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31 | * as published by the Free Software Foundation; either version 2
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32 | * of the License, or (at your option) any later version.
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33 | *
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34 | * This program is distributed in the hope that it will be useful,
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35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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37 | * GNU General Public License for more details.
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38 | *
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39 | * You should have received a copy of the GNU General Public License
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40 | * along with this program; if not, write to the Free Software
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41 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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42 | * MA 02110-1301, USA.
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43 | *
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44 | */
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45 | |||
46 | /*
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47 | * AUTHORS (In addition to CIT):
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48 | * 2008 PRODEVELOP S.L. Main Development
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49 | */
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50 | |||
51 | /**
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52 | *
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53 | */
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54 | package org.gvsig.fmap.geom.operation.isCCW; |
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55 | |||
56 | import java.awt.geom.PathIterator; |
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57 | |||
58 | import org.gvsig.fmap.geom.Geometry; |
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59 | import org.gvsig.fmap.geom.GeometryLocator; |
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60 | import org.gvsig.fmap.geom.GeometryManager; |
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61 | import org.gvsig.fmap.geom.operation.GeometryOperation; |
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62 | import org.gvsig.fmap.geom.operation.GeometryOperationContext; |
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63 | import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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64 | import org.gvsig.fmap.geom.primitive.GeneralPathX; |
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65 | import org.gvsig.fmap.geom.util.Converter; |
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66 | |||
67 | import com.vividsolutions.jts.algorithm.CGAlgorithms; |
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68 | import com.vividsolutions.jts.geom.Coordinate; |
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69 | import com.vividsolutions.jts.geom.CoordinateList; |
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70 | |||
71 | /**
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72 | * This class checks if the first part from the General Path of a complex geometry is CCW.
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73 | * @return Boolean <code>true<code> if is CCW
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74 | * @author Carlos S?nchez Peri??n <a href = "mailto:csanchez@prodevelop.es"> e-mail </a>
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75 | */
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76 | public class IsCCW extends GeometryOperation{ |
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77 | public static final String NAME = "isCCW"; |
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78 | private static GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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79 | public static final int CODE = geomManager.getGeometryOperationCode(NAME); |
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80 | |||
81 | private GeneralPathX generalPathX = null; |
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82 | |||
83 | public int getOperationIndex() { |
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84 | return CODE;
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85 | } |
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86 | |||
87 | public Object invoke(Geometry geom, GeometryOperationContext ctx) throws GeometryOperationException { |
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88 | generalPathX = geom.getGeneralPath(); |
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89 | if(generalPathX == null){ |
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90 | //if there isn't path the operation hasn't sense.
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91 | return null; |
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92 | } |
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93 | PathIterator theIterator = generalPathX.getPathIterator(null, geomManager.getFlatness()); //polyLine.getPathIterator(null, flatness); |
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94 | double[] theData = new double[6]; |
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95 | Coordinate first = null;
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96 | CoordinateList coordList = new CoordinateList();
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97 | Coordinate c1; |
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98 | boolean bFirst = true; |
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99 | while (!theIterator.isDone()) {
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100 | //while not done
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101 | int type = theIterator.currentSegment(theData);
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102 | switch (type)
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103 | { |
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104 | case GeneralPathX.SEG_MOVETO:
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105 | c1= new Coordinate(theData[0], theData[1]); |
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106 | if (bFirst == false) // Ya tenemos la primera parte. |
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107 | break;
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108 | if (bFirst)
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109 | { |
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110 | bFirst=false;
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111 | first = c1; |
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112 | } |
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113 | coordList.add(c1, true);
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114 | break;
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115 | case GeneralPathX.SEG_LINETO:
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116 | c1= new Coordinate(theData[0], theData[1]); |
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117 | coordList.add(c1, true);
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118 | break;
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119 | |||
120 | } |
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121 | theIterator.next(); |
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122 | } |
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123 | coordList.add(first, true);
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124 | return new Boolean(CGAlgorithms.isCCW(coordList.toCoordinateArray())); |
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125 | } |
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126 | |||
127 | } |