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 / spline / AbstractSpline.java @ 42633
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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.spline; |
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24 | |||
25 | import java.awt.Shape; |
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26 | import java.awt.geom.AffineTransform; |
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27 | import java.awt.geom.PathIterator; |
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28 | 42281 | fdiaz | import java.util.Collections; |
29 | 42267 | fdiaz | import java.util.Iterator; |
30 | |||
31 | import com.vividsolutions.jts.geom.Coordinate; |
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32 | |||
33 | import org.apache.commons.lang3.StringUtils; |
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34 | import org.cresques.cts.ICoordTrans; |
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35 | import org.slf4j.Logger; |
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36 | import org.slf4j.LoggerFactory; |
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37 | |||
38 | import org.gvsig.fmap.geom.exception.ReprojectionRuntimeException; |
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39 | import org.gvsig.fmap.geom.jts.gputils.DefaultGeneralPathX; |
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40 | import org.gvsig.fmap.geom.jts.gputils.GeneralPathXIterator; |
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41 | import org.gvsig.fmap.geom.jts.primitive.curve.AbstractCurve; |
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42 | import org.gvsig.fmap.geom.jts.primitive.point.Point2D; |
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43 | import org.gvsig.fmap.geom.jts.primitive.point.PointJTS; |
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44 | import org.gvsig.fmap.geom.jts.util.ArrayListCoordinateSequence; |
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45 | import org.gvsig.fmap.geom.jts.util.JTSUtils; |
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46 | import org.gvsig.fmap.geom.jts.util.ReadOnlyCoordinates; |
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47 | 42281 | fdiaz | import org.gvsig.fmap.geom.operation.GeometryOperationException; |
48 | import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException; |
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49 | 42267 | fdiaz | import org.gvsig.fmap.geom.primitive.GeneralPathX; |
50 | import org.gvsig.fmap.geom.primitive.IGeneralPathX; |
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51 | import org.gvsig.fmap.geom.primitive.Point; |
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52 | |||
53 | |||
54 | /**
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55 | * @author fdiaz
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56 | *
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57 | */
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58 | 42304 | fdiaz | public abstract class AbstractSpline extends AbstractCurve { |
59 | 42267 | fdiaz | |
60 | /**
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61 | *
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62 | */
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63 | private static final long serialVersionUID = -1562503359430991082L; |
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64 | |||
65 | private static final Logger logger = LoggerFactory.getLogger(AbstractSpline.class); |
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66 | |||
67 | protected ArrayListCoordinateSequence coordinates;
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68 | protected PointJTS anyVertex;
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69 | protected static final double SUBSEGMENTS = 30.0; |
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70 | |||
71 | /**
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72 | 42304 | fdiaz | * @param type
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73 | * @param subtype
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74 | */
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75 | public AbstractSpline(int type, int subtype) { |
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76 | super(type, subtype);
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77 | 42267 | fdiaz | } |
78 | |||
79 | /**
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80 | 42304 | fdiaz | *
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81 | */
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82 | public AbstractSpline(int type, int subtype, Coordinate[] coordinates, PointJTS aVertex) { |
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83 | this(type, subtype);
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84 | this.coordinates = new ArrayListCoordinateSequence(new ReadOnlyCoordinates(coordinates)); |
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85 | anyVertex = aVertex; |
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86 | } |
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87 | 42267 | fdiaz | |
88 | /*
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89 | * (non-Javadoc)
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90 | *
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91 | * @see org.gvsig.fmap.geom.jts.GeometryJTS#getJTS()
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92 | */
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93 | public com.vividsolutions.jts.geom.Geometry getJTS() {
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94 | return JTSUtils.createJTSLineString(getSplineCoordinates());
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95 | } |
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96 | |||
97 | protected abstract ArrayListCoordinateSequence getSplineCoordinates(); |
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98 | |||
99 | |||
100 | static class Spline { |
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101 | private double y[]; |
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102 | private double y2[]; |
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103 | |||
104 | /**
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105 | * The constructor calculates the second derivatives of the interpolating function
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106 | * at the tabulated points xi, with xi = (i, y[i]).
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107 | * Based on numerical recipes in C, http://www.library.cornell.edu/nr/bookcpdf/c3-3.pdf .
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108 | * @param y Array of y coordinates for cubic-spline interpolation.
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109 | */
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110 | public Spline(double y[]) { |
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111 | this.y = y;
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112 | int n = y.length;
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113 | y2 = new double[n]; |
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114 | double u[] = new double[n]; |
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115 | for (int i = 1; i < n - 1; i++) { |
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116 | y2[i] = -1.0 / (4.0 + y2[i - 1]); |
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117 | u[i] = (6.0 * (y[i + 1] - 2.0 * y[i] + y[i - 1]) - u[i - 1]) / (4.0 + y2[i - 1]); |
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118 | } |
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119 | for (int i = n - 2; i >= 0; i--) { |
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120 | y2[i] = y2[i] * y2[i + 1] + u[i];
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121 | } |
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122 | } |
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123 | |||
124 | /**
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125 | * Returns a cubic-spline interpolated value y for the point between
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126 | * point (n, y[n]) and (n+1, y[n+1), with t ranging from 0 for (n, y[n])
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127 | * to 1 for (n+1, y[n+1]).
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128 | * @param n The start point.
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129 | * @param t The distance to the next point (0..1).
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130 | * @return A cubic-spline interpolated value.
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131 | */
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132 | public double fn(int n, double t) { |
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133 | return t * y[n + 1] - ((t - 1.0) * t * ((t - 2.0) * y2[n] - (t + 1.0) * y2[n + 1])) / 6.0 + y[n] - t * y[n]; |
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134 | } |
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135 | |||
136 | } |
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137 | |||
138 | /*
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139 | * (non-Javadoc)
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140 | *
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141 | * @see
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142 | * org.gvsig.fmap.geom.primitive.OrientablePrimitive#addVertex(org.gvsig
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143 | * .fmap.geom.primitive.Point)
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144 | */
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145 | public void addVertex(Point point) { |
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146 | point = fixPoint(point); |
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147 | coordinates.add(((PointJTS) point).getJTSCoordinate()); |
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148 | 42283 | fdiaz | anyVertex = (PointJTS) point; |
149 | 42267 | fdiaz | } |
150 | |||
151 | /*
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152 | * (non-Javadoc)
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153 | *
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154 | * @see
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155 | * org.gvsig.fmap.geom.primitive.Curve#setPoints(org.gvsig.fmap.geom.primitive
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156 | * .Point, org.gvsig.fmap.geom.primitive.Point)
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157 | */
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158 | public void setPoints(Point initialPoint, Point endPoint) { |
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159 | initialPoint = fixPoint(initialPoint); |
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160 | endPoint = fixPoint(endPoint); |
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161 | coordinates.clear(); |
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162 | addVertex(initialPoint); |
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163 | addVertex(endPoint); |
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164 | 42283 | fdiaz | anyVertex = (PointJTS) endPoint; |
165 | 42267 | fdiaz | } |
166 | |||
167 | /**
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168 | * @param initialPoint
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169 | * @return
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170 | */
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171 | protected abstract Point fixPoint(Point point); |
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172 | |||
173 | /*
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174 | * (non-Javadoc)
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175 | *
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176 | * @see
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177 | * org.gvsig.fmap.geom.primitive.OrientablePrimitive#getCoordinateAt(int,
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178 | * int)
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179 | */
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180 | public double getCoordinateAt(int index, int dimension) { |
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181 | return coordinates.getOrdinate(index, dimension);
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182 | } |
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183 | |||
184 | /*
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185 | * (non-Javadoc)
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186 | *
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187 | * @see
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188 | * org.gvsig.fmap.geom.primitive.OrientablePrimitive#setCoordinateAt(int,
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189 | * int, double)
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190 | */
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191 | public void setCoordinateAt(int index, int dimension, double value) { |
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192 | coordinates.setOrdinate(index, dimension, value); |
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193 | } |
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194 | |||
195 | /*
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196 | * (non-Javadoc)
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197 | *
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198 | * @see org.gvsig.fmap.geom.primitive.OrientablePrimitive#removeVertex(int)
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199 | */
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200 | public void removeVertex(int index) { |
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201 | coordinates.remove(index); |
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202 | } |
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203 | |||
204 | /*
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205 | * (non-Javadoc)
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206 | *
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207 | * @see org.gvsig.fmap.geom.primitive.OrientablePrimitive#getNumVertices()
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208 | */
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209 | public int getNumVertices() { |
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210 | return coordinates.size();
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211 | } |
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212 | |||
213 | /*
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214 | * (non-Javadoc)
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215 | *
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216 | * @see org.gvsig.fmap.geom.primitive.OrientablePrimitive#insertVertex(int,
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217 | * org.gvsig.fmap.geom.primitive.Point)
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218 | */
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219 | public void insertVertex(int index, Point p) { |
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220 | p = fixPoint(p); |
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221 | coordinates.add(index, ((PointJTS) p).getJTSCoordinate()); |
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222 | } |
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223 | |||
224 | /*
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225 | * (non-Javadoc)
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226 | *
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227 | * @see org.gvsig.fmap.geom.primitive.OrientablePrimitive#setVertex(int,
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228 | * org.gvsig.fmap.geom.primitive.Point)
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229 | */
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230 | public void setVertex(int index, Point p) { |
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231 | p = fixPoint(p); |
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232 | coordinates.set(index, ((PointJTS) p).getJTSCoordinate()); |
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233 | } |
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234 | |||
235 | /*
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236 | * (non-Javadoc)
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237 | *
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238 | * @see
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239 | * org.gvsig.fmap.geom.primitive.OrientablePrimitive#setGeneralPath(org.
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240 | * gvsig.fmap.geom.primitive.GeneralPathX)
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241 | */
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242 | public void setGeneralPath(GeneralPathX generalPathX) { |
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243 | |||
244 | PathIterator it = generalPathX.getPathIterator(null); |
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245 | double[] segment = new double[6]; |
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246 | int i = 0; |
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247 | while(!it.isDone()){
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248 | int type = it.currentSegment(segment);
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249 | if(i==0){ |
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250 | switch (type) {
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251 | case IGeneralPathX.SEG_MOVETO:
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252 | Point p = new Point2D(segment[0], segment[1]); |
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253 | p = fixPoint(p); |
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254 | coordinates.add(((PointJTS)p).getJTSCoordinate()); |
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255 | break;
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256 | default:
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257 | String message = StringUtils.replace("Type of segment %(segment)s isn't SEG_MOVETO.","%(segment)s",String.valueOf(i)); |
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258 | logger.warn(message); |
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259 | throw new RuntimeException(message); |
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260 | } |
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261 | } else {
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262 | //Dudo de que los casos SEG_QUADTO y SEG_CUBICTO est?n bien pero se hac?a lo mismo en la librer?a de geometr?as vieja.
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263 | Point p;
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264 | switch (type) {
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265 | case IGeneralPathX.SEG_LINETO:
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266 | p = new Point2D(segment[0], segment[1]); |
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267 | p = fixPoint(p); |
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268 | coordinates.add(((PointJTS)p).getJTSCoordinate()); |
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269 | break;
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270 | case IGeneralPathX.SEG_QUADTO:
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271 | for (int j = 0; j <= 1; j++) { |
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272 | p = new Point2D(segment[i], segment[i+1]); |
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273 | p = fixPoint(p); |
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274 | coordinates.add(((PointJTS) p).getJTSCoordinate()); |
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275 | } |
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276 | break;
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277 | case IGeneralPathX.SEG_CUBICTO:
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278 | for (int j = 0; j <= 2; j++) { |
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279 | p = new Point2D(segment[i], segment[i+1]); |
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280 | p = fixPoint(p); |
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281 | coordinates.add(((PointJTS) p).getJTSCoordinate()); |
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282 | } |
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283 | break;
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284 | case IGeneralPathX.SEG_CLOSE:
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285 | coordinates.add(coordinates.get(0));
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286 | break;
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287 | default:
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288 | String message = StringUtils.replace("The general path has a gap in segment %(segment)s.","%(segment)s",String.valueOf(i)); |
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289 | logger.warn(message); |
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290 | throw new RuntimeException(message); |
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291 | } |
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292 | } |
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293 | it.next(); |
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294 | i++; |
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295 | } |
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296 | } |
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297 | |||
298 | /*
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299 | * (non-Javadoc)
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300 | *
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301 | * @see
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302 | * org.gvsig.fmap.geom.primitive.OrientablePrimitive#addMoveToVertex(org
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303 | * .gvsig.fmap.geom.primitive.Point)
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304 | */
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305 | public void addMoveToVertex(Point point) { |
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306 | throw new UnsupportedOperationException(); |
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307 | } |
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308 | |||
309 | /*
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310 | * (non-Javadoc)
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311 | *
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312 | * @see org.gvsig.fmap.geom.primitive.OrientablePrimitive#closePrimitive()
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313 | */
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314 | public void closePrimitive() { |
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315 | 42633 | fdiaz | if (!coordinates.isEmpty() && !isClosed()) {
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316 | coordinates.add((Coordinate)coordinates.get(0).clone());
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317 | 42267 | fdiaz | } |
318 | } |
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319 | |||
320 | /*
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321 | * (non-Javadoc)
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322 | *
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323 | * @see
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324 | * org.gvsig.fmap.geom.primitive.OrientablePrimitive#ensureCapacity(int)
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325 | */
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326 | public void ensureCapacity(int capacity) { |
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327 | coordinates.ensureCapacity(capacity); |
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328 | } |
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329 | |||
330 | /*
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331 | * (non-Javadoc)
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332 | *
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333 | * @see org.gvsig.fmap.geom.Geometry#reProject(org.cresques.cts.ICoordTrans)
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334 | */
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335 | public void reProject(ICoordTrans ct) { |
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336 | if (ct == null) { |
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337 | return;
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338 | } |
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339 | 42464 | fdiaz | ArrayListCoordinateSequence tmpCoordinates = new ArrayListCoordinateSequence();
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340 | tmpCoordinates.ensureCapacity(coordinates.size()); |
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341 | 42271 | fdiaz | for (Iterator<Coordinate> iterator = coordinates.iterator(); iterator.hasNext();) { |
342 | 42267 | fdiaz | Coordinate coordinate = (Coordinate) iterator.next(); |
343 | |||
344 | java.awt.geom.Point2D p = new java.awt.geom.Point2D.Double(coordinate.x, coordinate.y);
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345 | try {
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346 | p = ct.convert(p, p); |
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347 | coordinate.x = p.getX(); |
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348 | coordinate.y = p.getY(); |
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349 | 42464 | fdiaz | tmpCoordinates.add(coordinate); |
350 | 42267 | fdiaz | } catch (Exception exc) { |
351 | /*
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352 | * This can happen when the reprojection lib is unable
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353 | * to reproject (for example the source point
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354 | * is out of the valid range and some computing
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355 | * problem happens)
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356 | */
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357 | } |
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358 | } |
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359 | 42464 | fdiaz | coordinates=tmpCoordinates; |
360 | 42267 | fdiaz | } |
361 | |||
362 | /*
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363 | * (non-Javadoc)
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364 | *
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365 | * @see
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366 | * org.gvsig.fmap.geom.Geometry#transform(java.awt.geom.AffineTransform)
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367 | */
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368 | public void transform(AffineTransform at) { |
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369 | if (at == null) { |
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370 | return;
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371 | } |
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372 | |||
373 | 42271 | fdiaz | for (Iterator<Coordinate> iterator = coordinates.iterator(); iterator.hasNext();) { |
374 | 42267 | fdiaz | Coordinate coordinate = (Coordinate) iterator.next(); |
375 | java.awt.geom.Point2D p = new java.awt.geom.Point2D.Double(coordinate.x, coordinate.y);
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376 | |||
377 | at.transform(p, p); |
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378 | coordinate.x = p.getX(); |
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379 | coordinate.y = p.getY(); |
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380 | } |
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381 | } |
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382 | |||
383 | /*
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384 | * (non-Javadoc)
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385 | *
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386 | * @see org.gvsig.fmap.geom.Geometry#getDimension()
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387 | */
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388 | public int getDimension() { |
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389 | return anyVertex.getDimension();
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390 | } |
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391 | |||
392 | /*
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393 | * (non-Javadoc)
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394 | *
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395 | * @see org.gvsig.fmap.geom.Geometry#getShape(java.awt.geom.AffineTransform)
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396 | */
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397 | public Shape getShape(AffineTransform affineTransform) { |
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398 | return new DefaultGeneralPathX(new SplineIterator(affineTransform),false,0); |
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399 | } |
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400 | |||
401 | /*
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402 | * (non-Javadoc)
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403 | *
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404 | * @see org.gvsig.fmap.geom.Geometry#getShape()
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405 | */
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406 | public Shape getShape() { |
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407 | return getShape(null); |
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408 | } |
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409 | |||
410 | /*
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411 | * (non-Javadoc)
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412 | *
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413 | * @see
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414 | * org.gvsig.fmap.geom.Geometry#getPathIterator(java.awt.geom.AffineTransform
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415 | * )
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416 | */
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417 | public PathIterator getPathIterator(AffineTransform at) { |
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418 | SplineIterator pi = new SplineIterator(at);
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419 | return pi;
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420 | } |
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421 | |||
422 | /*
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423 | * (non-Javadoc)
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424 | *
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425 | * @see
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426 | * org.gvsig.fmap.geom.Geometry#getPathIterator(java.awt.geom.AffineTransform
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427 | * , double)
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428 | */
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429 | public PathIterator getPathIterator(AffineTransform at, double flatness) { |
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430 | return getPathIterator(at);
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431 | } |
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432 | |||
433 | /*
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434 | * (non-Javadoc)
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435 | *
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436 | * @see org.gvsig.fmap.geom.Geometry#getGeneralPath()
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437 | */
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438 | public GeneralPathX getGeneralPath() {
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439 | return new DefaultGeneralPathX(new SplineIterator(null),false,0); |
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440 | } |
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441 | |||
442 | public class SplineIterator extends GeneralPathXIterator { |
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443 | |||
444 | /** Transform applied on the coordinates during iteration */
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445 | private AffineTransform at; |
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446 | |||
447 | /** True when the point has been read once */
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448 | private boolean done; |
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449 | private int index = 0; |
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450 | |||
451 | /**
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452 | * Creates a new PointIterator object.
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453 | *
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454 | * @param p
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455 | * The polygon
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456 | * @param at
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457 | * The affine transform applied to coordinates during
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458 | * iteration
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459 | */
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460 | public SplineIterator(AffineTransform at) { |
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461 | super(new GeneralPathX()); |
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462 | if (at == null) { |
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463 | at = new AffineTransform(); |
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464 | } |
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465 | |||
466 | this.at = at;
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467 | done = false;
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468 | } |
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469 | |||
470 | /**
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471 | * Return the winding rule for determining the interior of the path.
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472 | *
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473 | * @return <code>WIND_EVEN_ODD</code> by default.
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474 | */
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475 | public int getWindingRule() { |
||
476 | return PathIterator.WIND_EVEN_ODD; |
||
477 | } |
||
478 | |||
479 | /**
|
||
480 | * @see java.awt.geom.PathIterator#next()
|
||
481 | */
|
||
482 | public void next() { |
||
483 | 42283 | fdiaz | done = (getJTS().getCoordinates().length == ++index); |
484 | 42267 | fdiaz | } |
485 | |||
486 | /**
|
||
487 | * @see java.awt.geom.PathIterator#isDone()
|
||
488 | */
|
||
489 | public boolean isDone() { |
||
490 | return done;
|
||
491 | } |
||
492 | |||
493 | /**
|
||
494 | * @see java.awt.geom.PathIterator#currentSegment(double[])
|
||
495 | */
|
||
496 | public int currentSegment(double[] coords) { |
||
497 | Coordinate[] jtsCoordinates = getJTS().getCoordinates();
|
||
498 | coords[0] = jtsCoordinates[index].x;
|
||
499 | coords[1] = jtsCoordinates[index].y;
|
||
500 | at.transform(coords, 0, coords, 0, 1); |
||
501 | |||
502 | if (index == 0) { |
||
503 | return PathIterator.SEG_MOVETO; |
||
504 | } else {
|
||
505 | return PathIterator.SEG_LINETO; |
||
506 | } |
||
507 | } |
||
508 | |||
509 | /*
|
||
510 | * (non-Javadoc)
|
||
511 | *
|
||
512 | * @see java.awt.geom.PathIterator#currentSegment(float[])
|
||
513 | */
|
||
514 | public int currentSegment(float[] coords) { |
||
515 | Coordinate[] jtsCoordinates = getJTS().getCoordinates();
|
||
516 | coords[0] = (float)jtsCoordinates[index].x; |
||
517 | coords[1] = (float)jtsCoordinates[index].y; |
||
518 | at.transform(coords, 0, coords, 0, 1); |
||
519 | |||
520 | if (index == 0) { |
||
521 | return PathIterator.SEG_MOVETO; |
||
522 | } else {
|
||
523 | return PathIterator.SEG_LINETO; |
||
524 | } |
||
525 | } |
||
526 | } |
||
527 | |||
528 | |||
529 | /*
|
||
530 | * (non-Javadoc)
|
||
531 | *
|
||
532 | * @see org.gvsig.fmap.geom.jts.GeometryJTS#is3D()
|
||
533 | */
|
||
534 | public boolean is3D() { |
||
535 | return anyVertex.is3D();
|
||
536 | } |
||
537 | |||
538 | 42281 | fdiaz | |
539 | /* (non-Javadoc)
|
||
540 | * @see org.gvsig.fmap.geom.jts.GeometryJTS#flip()
|
||
541 | */
|
||
542 | public void flip() throws GeometryOperationNotSupportedException, GeometryOperationException { |
||
543 | Collections.reverse(coordinates);
|
||
544 | } |
||
545 | |||
546 | 42283 | fdiaz | protected ArrayListCoordinateSequence cloneCoordinates() {
|
547 | ArrayListCoordinateSequence cloned = new ArrayListCoordinateSequence();
|
||
548 | cloned.ensureCapacity(coordinates.size()); |
||
549 | for (Iterator iterator = coordinates.iterator(); iterator.hasNext();) { |
||
550 | Coordinate coordinate = (Coordinate) iterator.next(); |
||
551 | cloned.add((Coordinate)coordinate.clone()); |
||
552 | } |
||
553 | return cloned;
|
||
554 | } |
||
555 | |||
556 | 42441 | fdiaz | |
557 | protected boolean isClosed(){ |
||
558 | return coordinates.get(0).equals(coordinates.get(coordinates.size()-1)); |
||
559 | } |
||
560 | |||
561 | 42267 | fdiaz | } |