svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.geometry / org.gvsig.fmap.geometry.jts / src / main / java / org / gvsig / fmap / geom / jts / primitive / curve / arc / Arc2D.java @ 42267
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1 | 42267 | fdiaz | /* gvSIG. Desktop Geographic Information System.
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2 | *
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3 | * Copyright ? 2007-2015 gvSIG Association
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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., 51 Franklin Street, Fifth Floor, Boston,
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18 | * MA 02110-1301, USA.
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19 | *
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20 | * For any additional information, do not hesitate to contact us
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21 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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22 | */
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23 | package org.gvsig.fmap.geom.jts.primitive.curve.arc; |
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24 | |||
25 | import java.awt.geom.PathIterator; |
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26 | |||
27 | import com.vividsolutions.jts.geom.Coordinate; |
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28 | |||
29 | import org.gvsig.fmap.geom.Geometry; |
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30 | import org.gvsig.fmap.geom.jts.primitive.point.Point2D; |
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31 | import org.gvsig.fmap.geom.jts.primitive.point.PointJTS; |
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32 | import org.gvsig.fmap.geom.jts.util.ArrayListCoordinateSequence; |
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33 | import org.gvsig.fmap.geom.jts.util.JTSUtils; |
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34 | import org.gvsig.fmap.geom.primitive.Point; |
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35 | |||
36 | |||
37 | |||
38 | /**
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39 | * @author fdiaz
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40 | *
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41 | */
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42 | public class Arc2D extends AbstractArc { |
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43 | |||
44 | /**
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45 | *
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46 | */
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47 | private static final long serialVersionUID = 3414562338763885954L; |
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48 | |||
49 | /**
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50 | * @param subtype
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51 | */
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52 | protected Arc2D() { |
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53 | super(Geometry.SUBTYPES.GEOM2D);
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54 | } |
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55 | |||
56 | /* (non-Javadoc)
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57 | * @see org.gvsig.fmap.geom.primitive.Arc#setPoints(org.gvsig.fmap.geom.primitive.Point, double, double, double)
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58 | */
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59 | public void setPoints(Point center, double radius, double startAngle, double angleExt) { |
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60 | |||
61 | double x;
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62 | double y;
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63 | double w;
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64 | double h;
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65 | double start;
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66 | double extent;
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67 | double angleOffset;
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68 | final double pi2 = Math.PI*2; |
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69 | |||
70 | angleOffset = 0;
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71 | if( angleExt<0 ) { |
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72 | angleOffset = pi2 + angleExt; |
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73 | angleExt = Math.abs(angleExt);
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74 | } |
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75 | x = center.getX() - radius; |
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76 | y = center.getY() - radius; |
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77 | w = radius * 2;
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78 | h = w; // Son siempre arcos de circunferencia
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79 | |||
80 | if( angleExt > 0 && (angleExt % pi2) == 0 ) { |
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81 | start = 0;
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82 | extent = 360;
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83 | } else {
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84 | angleExt = angleExt % pi2; //Asumimos que aqui angleExt es siempre positivo
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85 | startAngle = Math.abs(startAngle) % pi2;
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86 | start = Math.toDegrees( pi2 - startAngle + angleOffset) ;
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87 | extent = - Math.toDegrees(pi2 - angleExt);
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88 | } |
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89 | |||
90 | |||
91 | double angleStart = Math.toRadians(-start); |
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92 | double initX = x + (Math.cos(angleStart) * 0.5 + 0.5) * radius*2; |
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93 | double initY = y + (Math.sin(angleStart) * 0.5 + 0.5) * radius*2; |
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94 | init = new Point2D(initX, initY); |
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95 | |||
96 | double angleEnd = Math.toRadians(-start - extent); |
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97 | double endX = x + (Math.cos(angleEnd) * 0.5 + 0.5) * radius*2; |
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98 | double endY = y + (Math.sin(angleEnd) * 0.5 + 0.5) * radius*2; |
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99 | end = new Point2D(endX, endY); |
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100 | |||
101 | double angleMiddle = Math.toRadians(-start - extent)/2; |
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102 | double middleX = x + (Math.cos(angleMiddle) * 0.5 + 0.5) * radius*2; |
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103 | double middleY = y + (Math.sin(angleMiddle) * 0.5 + 0.5) * radius*2; |
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104 | end = new Point2D(middleX, middleY); |
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105 | } |
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106 | |||
107 | /* (non-Javadoc)
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108 | * @see org.gvsig.fmap.geom.primitive.Arc#getCenterPoint()
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109 | */
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110 | public Point getCenterPoint() { |
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111 | ((PointJTS)init).getJTS(); |
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112 | Point2D center = new Point2D(JTSUtils.getCircumcentre(init, middle, end)); |
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113 | return center;
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114 | } |
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115 | |||
116 | /* (non-Javadoc)
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117 | * @see org.gvsig.fmap.geom.Geometry#cloneGeometry()
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118 | */
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119 | public Geometry cloneGeometry() {
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120 | Arc2D arc2D = new Arc2D(); |
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121 | arc2D.setPoints(init, middle, end); |
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122 | return arc2D;
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123 | } |
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124 | |||
125 | /*
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126 | * (non-Javadoc)
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127 | *
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128 | * @see
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129 | * org.gvsig.fmap.geom.jts.primitive.curve.line.AbstractLine#fixPoint(org
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130 | * .gvsig.fmap.geom.primitive.Point)
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131 | */
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132 | @Override
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133 | protected Point fixPoint(Point point) { |
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134 | if (point instanceof Point2D) { |
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135 | return point;
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136 | } else {
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137 | return new Point2D(point.getX(), point.getY()); |
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138 | } |
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139 | } |
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140 | |||
141 | /* (non-Javadoc)
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142 | * @see org.gvsig.fmap.geom.jts.GeometryJTS#getJTS()
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143 | */
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144 | public com.vividsolutions.jts.geom.Geometry getJTS() {
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145 | PathIterator pi = getPathIterator(null); |
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146 | ArrayListCoordinateSequence coordinates = new ArrayListCoordinateSequence();
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147 | |||
148 | double coords[] = new double[6]; |
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149 | while (!pi.isDone()) {
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150 | switch (pi.currentSegment(coords)) {
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151 | case PathIterator.SEG_MOVETO: |
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152 | coordinates.add(new Coordinate(coords[0], coords[1])); |
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153 | break;
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154 | case PathIterator.SEG_LINETO: |
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155 | coordinates.add(new Coordinate(coords[0], coords[1])); |
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156 | break;
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157 | case PathIterator.SEG_QUADTO: |
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158 | coordinates.add(new Coordinate(coords[0], coords[1])); |
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159 | coordinates.add(new Coordinate(coords[2], coords[3])); |
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160 | break;
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161 | case PathIterator.SEG_CUBICTO: |
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162 | coordinates.add(new Coordinate(coords[0], coords[1])); |
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163 | coordinates.add(new Coordinate(coords[2], coords[3])); |
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164 | coordinates.add(new Coordinate(coords[4], coords[5])); |
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165 | break;
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166 | case PathIterator.SEG_CLOSE: |
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167 | coordinates.add(coordinates.get(0));
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168 | break;
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169 | } |
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170 | pi.next(); |
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171 | } |
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172 | return JTSUtils.createJTSLinearRing(coordinates);
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173 | } |
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174 | |||
175 | |||
176 | } |