root / branches / v10 / libraries / libFMap / src / com / iver / cit / gvsig / fmap / core / GeneralPathXIterator.java @ 18449
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1 | 214 | fernando | /*
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2 | * Created on 10-jun-2004
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3 | *
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4 | * TODO To change the template for this generated file go to
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5 | * Window - Preferences - Java - Code Generation - Code and Comments
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6 | */
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7 | 1100 | fjp | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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8 | *
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9 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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10 | *
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11 | * This program is free software; you can redistribute it and/or
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12 | * modify it under the terms of the GNU General Public License
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13 | * as published by the Free Software Foundation; either version 2
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14 | * of the License, or (at your option) any later version.
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15 | *
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16 | * This program is distributed in the hope that it will be useful,
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | * GNU General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU General Public License
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22 | * along with this program; if not, write to the Free Software
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23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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24 | *
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25 | * For more information, contact:
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26 | *
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27 | * Generalitat Valenciana
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28 | * Conselleria d'Infraestructures i Transport
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29 | * Av. Blasco Ib??ez, 50
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30 | * 46010 VALENCIA
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31 | * SPAIN
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32 | *
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33 | * +34 963862235
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34 | * gvsig@gva.es
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35 | * www.gvsig.gva.es
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36 | *
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37 | * or
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38 | *
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39 | * IVER T.I. S.A
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40 | * Salamanca 50
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41 | * 46005 Valencia
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42 | * Spain
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43 | *
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44 | * +34 963163400
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45 | * dac@iver.es
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46 | */
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47 | 214 | fernando | package com.iver.cit.gvsig.fmap.core; |
48 | |||
49 | import java.awt.geom.AffineTransform; |
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50 | import java.awt.geom.PathIterator; |
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51 | |||
52 | /*
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53 | * @(#)GeneralPathXIterator.java 1.21 03/01/23
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54 | *
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55 | * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
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56 | * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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57 | */
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58 | |||
59 | /**
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60 | * This class represents the iterator for General Paths X.
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61 | * It can be used to retrieve all of the elements in a GeneralPathX.
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62 | * The {@link GeneralPathX#getPathIterator}
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63 | * method is used to create a
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64 | * GeneralPathXIterator for a particular GeneralPathX.
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65 | * The iterator can be used to iterator the path only once.
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66 | * Subsequent iterations require a new iterator.
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67 | *
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68 | * @see GeneralPathX
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69 | *
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70 | * @version 10 Feb 1997
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71 | * @author Jim Graham
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72 | */
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73 | 1132 | vcaballero | public class GeneralPathXIterator implements PathIterator { |
74 | 214 | fernando | int typeIdx = 0; |
75 | int pointIdx = 0; |
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76 | GeneralPathX path; |
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77 | AffineTransform affine;
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78 | |||
79 | private static final int curvesize[] = {2, 2, 4, 6, 0}; |
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80 | |||
81 | /**
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82 | * Constructs an iterator given a GeneralPathX.
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83 | * @see GeneralPathX#getPathIterator
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84 | */
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85 | GeneralPathXIterator(GeneralPathX path) { |
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86 | this(path, null); |
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87 | } |
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88 | |||
89 | /**
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90 | * Constructs an iterator given a GeneralPathX and an optional
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91 | * AffineTransform.
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92 | * @see GeneralPathX#getPathIterator
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93 | */
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94 | GeneralPathXIterator(GeneralPathX path, AffineTransform at) {
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95 | this.path = path;
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96 | this.affine = at;
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97 | } |
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98 | |||
99 | /**
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100 | * Return the winding rule for determining the interior of the
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101 | * path.
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102 | * @see PathIterator#WIND_EVEN_ODD
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103 | * @see PathIterator#WIND_NON_ZERO
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104 | */
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105 | public int getWindingRule() { |
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106 | return path.getWindingRule();
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107 | } |
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108 | |||
109 | /**
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110 | * Tests if there are more points to read.
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111 | * @return true if there are more points to read
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112 | */
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113 | public boolean isDone() { |
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114 | return (typeIdx >= path.numTypes);
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115 | } |
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116 | |||
117 | /**
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118 | * Moves the iterator to the next segment of the path forwards
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119 | * along the primary direction of traversal as long as there are
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120 | * more points in that direction.
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121 | */
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122 | public void next() { |
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123 | int type = path.pointTypes[typeIdx++];
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124 | pointIdx += curvesize[type]; |
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125 | } |
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126 | |||
127 | /**
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128 | * Returns the coordinates and type of the current path segment in
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129 | * the iteration.
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130 | * The return value is the path segment type:
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131 | * SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE.
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132 | * A float array of length 6 must be passed in and may be used to
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133 | * store the coordinates of the point(s).
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134 | * Each point is stored as a pair of float x,y coordinates.
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135 | * SEG_MOVETO and SEG_LINETO types will return one point,
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136 | * SEG_QUADTO will return two points,
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137 | * SEG_CUBICTO will return 3 points
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138 | * and SEG_CLOSE will not return any points.
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139 | * @see PathIterator#SEG_MOVETO
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140 | * @see PathIterator#SEG_LINETO
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141 | * @see PathIterator#SEG_QUADTO
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142 | * @see PathIterator#SEG_CUBICTO
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143 | * @see PathIterator#SEG_CLOSE
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144 | */
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145 | public int currentSegment(float[] coords) { |
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146 | int type = path.pointTypes[typeIdx];
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147 | int numCoords = curvesize[type];
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148 | if (numCoords > 0 && affine != null) { |
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149 | affine.transform(path.pointCoords, pointIdx, |
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150 | coords, 0,
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151 | numCoords / 2);
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152 | } else {
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153 | for (int i=0; i < numCoords; i++) { |
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154 | coords[i] = (float) path.pointCoords[pointIdx + i];
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155 | } |
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156 | |||
157 | } |
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158 | return type;
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159 | } |
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160 | |||
161 | /**
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162 | * Returns the coordinates and type of the current path segment in
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163 | * the iteration.
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164 | * The return value is the path segment type:
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165 | * SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE.
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166 | * A double array of length 6 must be passed in and may be used to
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167 | * store the coordinates of the point(s).
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168 | * Each point is stored as a pair of double x,y coordinates.
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169 | * SEG_MOVETO and SEG_LINETO types will return one point,
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170 | * SEG_QUADTO will return two points,
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171 | * SEG_CUBICTO will return 3 points
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172 | * and SEG_CLOSE will not return any points.
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173 | * @see PathIterator#SEG_MOVETO
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174 | * @see PathIterator#SEG_LINETO
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175 | * @see PathIterator#SEG_QUADTO
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176 | * @see PathIterator#SEG_CUBICTO
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177 | * @see PathIterator#SEG_CLOSE
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178 | */
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179 | public int currentSegment(double[] coords) { |
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180 | int type = path.pointTypes[typeIdx];
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181 | int numCoords = curvesize[type];
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182 | if (numCoords > 0 && affine != null) { |
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183 | affine.transform(path.pointCoords, pointIdx, |
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184 | coords, 0,
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185 | numCoords / 2);
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186 | } else {
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187 | System.arraycopy(path.pointCoords, pointIdx, coords, 0, numCoords); |
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188 | } |
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189 | return type;
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190 | } |
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191 | } |