svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.shp / src / main / java / org / gvsig / fmap / dal / store / shp / utils / SHPPolygon.java @ 40435
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1 | 40435 | jjdelcerro | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib??ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package org.gvsig.fmap.dal.store.shp.utils; |
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42 | |||
43 | import java.awt.geom.Rectangle2D; |
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44 | import java.nio.ByteBuffer; |
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45 | import java.nio.MappedByteBuffer; |
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46 | |||
47 | import org.gvsig.fmap.geom.Geometry; |
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48 | import org.gvsig.fmap.geom.GeometryLocator; |
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49 | import org.gvsig.fmap.geom.GeometryManager; |
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50 | import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
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51 | import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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52 | import org.gvsig.fmap.geom.primitive.Envelope; |
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53 | import org.gvsig.fmap.geom.primitive.Point; |
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54 | import org.slf4j.Logger; |
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55 | import org.slf4j.LoggerFactory; |
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56 | |||
57 | /**
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58 | * Elemento shape de tipo Pol?gono.
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59 | *
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60 | * @author Vicente Caballero Navarro
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61 | */
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62 | public class SHPPolygon extends SHPMultiLine { |
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63 | private static final GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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64 | private static final Logger logger = LoggerFactory.getLogger(SHPPolygon.class); |
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65 | |||
66 | /**
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67 | * Crea un nuevo SHPPolygon.
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68 | */
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69 | public SHPPolygon() {
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70 | m_type = SHP.POLYGON2D; |
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71 | } |
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72 | |||
73 | /**
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74 | * Crea un nuevo SHPPolygon.
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75 | *
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76 | * @param type Tipo de shape.
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77 | *
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78 | * @throws ShapefileException
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79 | */
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80 | public SHPPolygon(int type) { |
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81 | if ((type != SHP.POLYGON2D) &&
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82 | (type != SHP.POLYGONM) && |
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83 | (type != SHP.POLYGON3D)) { |
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84 | // throw new ShapefileException("No es de tipo 5, 15, o 25");
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85 | } |
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86 | |||
87 | m_type = type; |
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88 | } |
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89 | |||
90 | /**
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91 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#getShapeType()
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92 | */
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93 | public int getShapeType() { |
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94 | return m_type;
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95 | } |
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96 | |||
97 | /**
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98 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#read(MappedByteBuffer, int)
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99 | */
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100 | public synchronized Geometry read(MappedByteBuffer buffer, int type) { |
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101 | double minX = buffer.getDouble();
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102 | double minY = buffer.getDouble();
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103 | double maxX = buffer.getDouble();
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104 | double maxY = buffer.getDouble();
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105 | Rectangle2D rec = new Rectangle2D.Double(minX, minY, maxX - minX, |
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106 | maxY - maxY); |
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107 | int numParts = buffer.getInt();
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108 | int numPoints = buffer.getInt();
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109 | |||
110 | int[] partOffsets = new int[numParts]; |
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111 | |||
112 | for (int i = 0; i < numParts; i++) { |
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113 | partOffsets[i] = buffer.getInt(); |
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114 | } |
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115 | |||
116 | Point[] points = readPoints(buffer, numPoints); |
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117 | |||
118 | /* if (m_type == FConstant.SHAPE_TYPE_POLYGONZ) {
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119 | //z
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120 | buffer.position(buffer.position() + (2 * 8));
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121 | for (int t = 0; t < numPoints; t++) {
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122 | points[t].z = buffer.getDouble();
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123 | }
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124 | }
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125 | */
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126 | int offset = 0; |
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127 | int start;
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128 | int finish;
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129 | int length;
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130 | |||
131 | for (int part = 0; part < numParts; part++) { |
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132 | start = partOffsets[part]; |
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133 | |||
134 | if (part == (numParts - 1)) { |
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135 | finish = numPoints; |
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136 | } else {
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137 | finish = partOffsets[part + 1];
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138 | } |
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139 | |||
140 | length = finish - start; |
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141 | |||
142 | Point[] pointsPart = new Point[length]; |
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143 | |||
144 | for (int i = 0; i < length; i++) { |
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145 | pointsPart[i] = points[offset++]; |
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146 | } |
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147 | } |
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148 | |||
149 | try {
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150 | return geomManager.createSurface(getGeneralPathX(points, partOffsets), SUBTYPES.GEOM2D);
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151 | } catch (CreateGeometryException e) {
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152 | logger.error("Error creating a surface", e);
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153 | return null; |
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154 | } |
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155 | } |
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156 | |||
157 | /**
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158 | * Lee los puntos del buffer.
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159 | *
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160 | * @param buffer
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161 | * @param numPoints N?mero de puntos.
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162 | *
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163 | * @return Vector de Puntos.
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164 | */
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165 | private synchronized Point[] readPoints(final MappedByteBuffer buffer, |
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166 | final int numPoints) { |
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167 | Point[] points = new Point[numPoints]; |
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168 | |||
169 | for (int t = 0; t < numPoints; t++) { |
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170 | try {
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171 | points[t] = geomManager.createPoint(buffer.getDouble(), buffer.getDouble(), SUBTYPES.GEOM2D); |
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172 | } catch (CreateGeometryException e) {
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173 | logger.error("Error creating a point", e);
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174 | } |
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175 | } |
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176 | |||
177 | return points;
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178 | } |
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179 | |||
180 | /**
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181 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#write(ByteBuffer, IGeometry)
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182 | */
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183 | public synchronized void write(ByteBuffer buffer, Geometry geometry) { |
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184 | Envelope env = geometry.getEnvelope(); |
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185 | |||
186 | buffer.putDouble(env.getMinimum(0));
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187 | buffer.putDouble(env.getMinimum(1));
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188 | buffer.putDouble(env.getMaximum(0));
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189 | buffer.putDouble(env.getMaximum(1));
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190 | |||
191 | int nparts = parts.length;
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192 | int npoints = points.length;
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193 | |||
194 | buffer.putInt(nparts); |
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195 | buffer.putInt(npoints); |
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196 | |||
197 | for (int t = 0; t < nparts; t++) { |
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198 | buffer.putInt(parts[t]); |
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199 | } |
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200 | |||
201 | for (int t = 0; t < points.length; t++) { |
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202 | buffer.putDouble(points[t].getX()); |
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203 | buffer.putDouble(points[t].getY()); |
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204 | } |
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205 | |||
206 | if (m_type == SHP.POLYGON3D) {
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207 | double[] zExtreame = SHP.getZMinMax(zs); |
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208 | if (Double.isNaN(zExtreame[0])) { |
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209 | buffer.putDouble(0.0);
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210 | buffer.putDouble(0.0);
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211 | } else {
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212 | buffer.putDouble(zExtreame[0]);
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213 | buffer.putDouble(zExtreame[1]);
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214 | } |
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215 | for (int t = 0; t < npoints; t++) { |
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216 | double z = zs[t];
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217 | if (Double.isNaN(z)) { |
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218 | buffer.putDouble(0.0);
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219 | } else {
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220 | buffer.putDouble(z); |
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221 | } |
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222 | } |
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223 | } |
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224 | |||
225 | if ((m_type == SHP.POLYGONM)) {
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226 | buffer.putDouble(-10E40);
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227 | buffer.putDouble(-10E40);
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228 | |||
229 | for (int t = 0; t < npoints; t++) { |
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230 | buffer.putDouble(-10E40);
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231 | } |
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232 | } |
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233 | } |
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234 | |||
235 | /**
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236 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#getLength(com.iver.cit.gvsig.core.BasicShape.FGeometry)
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237 | */
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238 | public synchronized int getLength(Geometry fgeometry) { |
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239 | int npoints = points.length;
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240 | |||
241 | int length;
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242 | |||
243 | if (m_type == SHP.POLYGON3D || m_type == SHP.POLYGONM) {
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244 | length = 44 + (4 * parts.length) + (16 * npoints) + (8 * npoints) + 16; |
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245 | } else if (m_type == SHP.POLYGON2D) { |
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246 | length = 44 + (4 * parts.length) + (16 * npoints); |
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247 | } else {
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248 | throw new IllegalStateException("Expected ShapeType of Polygon, got " + m_type); |
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249 | } |
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250 | |||
251 | return length;
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252 | } |
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253 | } |