root / trunk / libraries / libDwg / src / com / iver / cit / jdwglib / util / GisModelCurveCalculator.java @ 23942
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| 1 | 9720 | azabala | /* jdwglib. Java Library for reading Dwg files.
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| 2 | *
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| 3 | * Author: Jose Morell Rama (jose.morell@gmail.com).
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| 4 | * Port from the Pythoncad Dwg library by Art Haas.
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| 5 | *
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| 6 | * Copyright (C) 2005 Jose Morell, IVER TI S.A. and Generalitat Valenciana
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| 7 | *
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| 8 | * This program is free software; you can redistribute it and/or
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| 9 | * modify it under the terms of the GNU General Public License
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| 10 | * as published by the Free Software Foundation; either version 2
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| 11 | * of the License, or (at your option) any later version.
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| 12 | *
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| 13 | * This program is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | * GNU General Public License for more details.
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| 17 | *
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| 18 | * You should have received a copy of the GNU General Public License
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| 19 | * along with this program; if not, write to the Free Software
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| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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| 21 | *
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| 22 | * For more information, contact:
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| 23 | *
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| 24 | * Jose Morell (jose.morell@gmail.com)
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| 25 | *
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| 26 | * or
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| 27 | *
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| 28 | * IVER TI S.A.
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| 29 | * C/Salamanca, 50
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| 30 | * 46005 Valencia
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| 31 | * Spain
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| 32 | * +34 963163400
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| 33 | * dac@iver.es
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| 34 | */
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| 35 | package com.iver.cit.jdwglib.util; |
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| 36 | |||
| 37 | import java.awt.geom.Point2D; |
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| 38 | 10632 | azabala | import java.util.ArrayList; |
| 39 | import java.util.List; |
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| 40 | 9720 | azabala | import java.util.Vector; |
| 41 | |||
| 42 | /**
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| 43 | * This class allows to obtain arcs and circles given by the most usual parameters, in a
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| 44 | * Gis geometry model. In this model, an arc or a circle is given by a set of points that
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| 45 | * defines it shape
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| 46 | *
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| 47 | * @author jmorell
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| 48 | */
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| 49 | public class GisModelCurveCalculator { |
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| 50 | |||
| 51 | /**
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| 52 | * This method calculates an array of Point2D that represents a circle. The distance
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| 53 | * between it points is 1 angular unit
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| 54 | *
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| 55 | * @param c Point2D that represents the center of the circle
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| 56 | * @param r double value that represents the radius of the circle
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| 57 | * @return Point2D[] An array of Point2D that represents the shape of the circle
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| 58 | */
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| 59 | 23942 | vcaballero | public static List calculateGisModelCircle(Point2D c, double r) { |
| 60 | List pts = new ArrayList(); |
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| 61 | 9720 | azabala | int angulo = 0; |
| 62 | for (angulo=0; angulo<360; angulo++) { |
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| 63 | 10632 | azabala | double[] pt = new double[]{c.getX(), c.getY()}; |
| 64 | pt[0] = pt[0] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 65 | pt[1] = pt[1] + r * Math.cos(angulo*Math.PI/(double)180.0); |
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| 66 | |||
| 67 | pts.add(pt); |
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| 68 | 9720 | azabala | } |
| 69 | return pts;
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| 70 | } |
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| 71 | |||
| 72 | /**
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| 73 | * This method calculates an array of Point2D that represents a ellipse. The distance
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| 74 | * between it points is 1 angular unit
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| 75 | *
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| 76 | * @param center Point2D that represents the center of the ellipse
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| 77 | * @param majorAxisVector Point2D that represents the vector for the major axis
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| 78 | * @param axisRatio double value that represents the axis ratio
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| 79 | * @param initAngle double value that represents the start angle of the ellipse arc
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| 80 | * @param endAngle double value that represents the end angle of the ellipse arc
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| 81 | * @return Point2D[] An array of Point2D that represents the shape of the ellipse
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| 82 | */
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| 83 | 10632 | azabala | public static List calculateGisModelEllipse(Point2D center, Point2D majorAxisVector, double axisRatio, double initAngle, double endAngle) { |
| 84 | 9720 | azabala | Point2D majorPoint = new Point2D.Double(center.getX()+majorAxisVector.getX(), center.getY()+majorAxisVector.getY()); |
| 85 | 10632 | azabala | double orientation = Math.atan(majorAxisVector.getY()/majorAxisVector.getX()); |
| 86 | 9720 | azabala | double semiMajorAxisLength = center.distance(majorPoint);
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| 87 | double semiMinorAxisLength = semiMajorAxisLength*axisRatio;
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| 88 | double eccentricity = Math.sqrt(1-((Math.pow(semiMinorAxisLength, 2))/(Math.pow(semiMajorAxisLength, 2)))); |
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| 89 | int isa = (int)initAngle; |
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| 90 | int iea = (int)endAngle; |
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| 91 | double angulo;
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| 92 | 23942 | vcaballero | List pts = new ArrayList(); |
| 93 | 9720 | azabala | if (initAngle <= endAngle) {
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| 94 | angulo = initAngle; |
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| 95 | double r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 96 | double x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 97 | double y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 98 | double xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 99 | double yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 100 | 10632 | azabala | |
| 101 | double[] pt = new double[]{center.getX() + xrot, center.getY() + yrot }; |
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| 102 | pts.add(pt); |
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| 103 | |||
| 104 | 9720 | azabala | for (int i=1; i<=(iea-isa)+1; i++) { |
| 105 | angulo = (double)(isa+i);
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| 106 | r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 107 | x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 108 | y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 109 | xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 110 | yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 111 | 10632 | azabala | |
| 112 | pt = new double[]{center.getX() + xrot, center.getY() + yrot}; |
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| 113 | pts.add(pt); |
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| 114 | 9720 | azabala | } |
| 115 | 10632 | azabala | |
| 116 | 9720 | azabala | angulo = endAngle; |
| 117 | r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 118 | x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 119 | y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 120 | xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 121 | yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 122 | 10632 | azabala | |
| 123 | |||
| 124 | pt = new double[]{center.getX() + xrot, center.getY() + yrot}; |
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| 125 | pts.add(pt); |
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| 126 | |||
| 127 | 9720 | azabala | } else {
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| 128 | angulo = initAngle; |
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| 129 | double r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 130 | double x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 131 | double y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 132 | double xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 133 | double yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 134 | 10632 | azabala | |
| 135 | |||
| 136 | double[] pt = new double[]{center.getX() + r*Math.cos(angulo*Math.PI/(double)180.0), center.getY() + r*Math.sin(angulo*Math.PI/(double)180.0)}; |
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| 137 | pts.add(pt); |
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| 138 | |||
| 139 | for (int i=1; i<=(360-isa); i++) { |
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| 140 | 9720 | azabala | angulo = (double)(isa+i);
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| 141 | r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 142 | x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 143 | y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 144 | xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 145 | yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 146 | 10632 | azabala | |
| 147 | pt = new double[]{center.getX() + xrot, center.getY() + yrot}; |
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| 148 | pts.add(pt); |
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| 149 | 9720 | azabala | } |
| 150 | 10632 | azabala | |
| 151 | |||
| 152 | 9720 | azabala | for (int i=(360-isa)+1; i<=(360-isa)+iea; i++) { |
| 153 | angulo = (double)(i-(360-isa)); |
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| 154 | r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 155 | x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 156 | y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 157 | xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 158 | yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 159 | 10632 | azabala | |
| 160 | pt = new double[]{center.getX() + xrot, center.getY() + yrot}; |
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| 161 | pts.add(pt); |
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| 162 | |||
| 163 | 9720 | azabala | } |
| 164 | 10632 | azabala | |
| 165 | 9720 | azabala | angulo = endAngle; |
| 166 | r = semiMinorAxisLength/Math.sqrt(1-((Math.pow(eccentricity, 2))*(Math.pow(Math.cos(angulo*Math.PI/(double)180.0), 2)))); |
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| 167 | x = r*Math.cos(angulo*Math.PI/(double)180.0); |
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| 168 | y = r*Math.sin(angulo*Math.PI/(double)180.0); |
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| 169 | xrot = x*Math.cos(orientation) - y*Math.sin(orientation); |
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| 170 | yrot = x*Math.sin(orientation) + y*Math.cos(orientation); |
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| 171 | 10632 | azabala | |
| 172 | pt = new double[]{center.getX() + xrot, center.getY() + yrot}; |
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| 173 | pts.add(pt); |
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| 174 | 9720 | azabala | } |
| 175 | return pts;
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| 176 | } |
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| 177 | |||
| 178 | /**
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| 179 | * This method calculates an array of Point2D that represents an arc. The distance
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| 180 | * between it points is 1 angular unit
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| 181 | *
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| 182 | * @param c Point2D that represents the center of the arc
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| 183 | * @param r double value that represents the radius of the arc
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| 184 | * @param sa double value that represents the start angle of the arc
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| 185 | * @param ea double value that represents the end angle of the arc
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| 186 | * @return Point2D[] An array of Point2D that represents the shape of the arc
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| 187 | */
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| 188 | 10632 | azabala | public static List calculateGisModelArc(double[] center, double r, double sa, double ea) { |
| 189 | 9720 | azabala | int isa = (int)sa; |
| 190 | int iea = (int)ea; |
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| 191 | double angulo;
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| 192 | 23942 | vcaballero | List pts = new ArrayList(); |
| 193 | 9720 | azabala | if (sa <= ea) {
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| 194 | angulo = sa; |
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| 195 | 10632 | azabala | pts.add(new double[]{center[0] + r * Math.cos(angulo*Math.PI/(double)180.0), |
| 196 | center[1] + r * Math.sin(angulo*Math.PI/(double)180.0)}); |
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| 197 | for (int i=1; i <= (iea-isa)+1; i++) { |
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| 198 | 9720 | azabala | angulo = (double)(isa+i);
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| 199 | 10632 | azabala | double x = center[0] + r * Math.cos(angulo*Math.PI/(double)180.0); |
| 200 | double y = center[1] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 201 | pts.add(new double[]{x, y}); |
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| 202 | 9720 | azabala | } |
| 203 | angulo = ea; |
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| 204 | 10632 | azabala | double x = center[0] + r * Math.cos(angulo*Math.PI/(double)180.0); |
| 205 | double y = center[1] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 206 | pts.add(new double[]{x, y}); |
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| 207 | 9720 | azabala | } else {
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| 208 | angulo = sa; |
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| 209 | 10632 | azabala | double x = center[0] + r * Math.cos(angulo*Math.PI/(double)180.0); |
| 210 | double y = center[1] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 211 | pts.add(new double[]{x, y}); |
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| 212 | for (int i=1; i <= (360-isa); i++) { |
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| 213 | 9720 | azabala | angulo = (double)(isa+i);
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| 214 | 10632 | azabala | x = center[0] + r * Math.cos(angulo*Math.PI/(double)180.0); |
| 215 | y = center[1] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 216 | pts.add(new double[]{x, y}); |
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| 217 | 9720 | azabala | } |
| 218 | 10632 | azabala | |
| 219 | for (int i=( 360-isa)+1; i <= (360-isa)+iea; i++) { |
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| 220 | 9720 | azabala | angulo = (double)(i-(360-isa)); |
| 221 | 10632 | azabala | x = center[0] + r * Math.cos(angulo*Math.PI/(double)180.0); |
| 222 | y = center[1] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 223 | pts.add(new double[]{x, y}); |
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| 224 | 9720 | azabala | } |
| 225 | angulo = ea; |
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| 226 | 10632 | azabala | x = center[0] + r * Math.cos(angulo*Math.PI/(double)180.0); |
| 227 | y = center[1] + r * Math.sin(angulo*Math.PI/(double)180.0); |
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| 228 | pts.add(new double[]{x, y}); |
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| 229 | 9720 | azabala | } |
| 230 | return pts;
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| 231 | } |
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| 232 | |||
| 233 | /**
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| 234 | * This method applies an array of bulges to an array of Point2D that defines a
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| 235 | * polyline. The result is a polyline with the input points with the addition of the
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| 236 | * points that define the new arcs added to the polyline
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| 237 | *
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| 238 | * @param newPts Base points of the polyline
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| 239 | * @param bulges Array of bulge parameters
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| 240 | * @return Polyline with a new set of arcs added and defined by the bulge parameters
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| 241 | */
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| 242 | 23942 | vcaballero | public static List calculateGisModelBulge(List newPts, double[] bulges) { |
| 243 | Vector ptspol = new Vector(); |
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| 244 | 10632 | azabala | double[] init = null; |
| 245 | double[] end = null; |
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| 246 | for (int j=0; j<newPts.size(); j++) { |
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| 247 | init = (double[]) newPts.get(j); |
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| 248 | if (j != newPts.size()-1) |
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| 249 | end = (double[]) newPts.get(j+1); |
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| 250 | if (bulges[j]==0 || j== newPts.size()-1 || |
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| 251 | (init[0] == end[0] && init[1] == end[1])) { |
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| 252 | 9720 | azabala | ptspol.add(init); |
| 253 | } else {
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| 254 | ArcFromBulgeCalculator arcCalculator = new ArcFromBulgeCalculator(init, end, bulges[j]);
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| 255 | Vector arc = arcCalculator.getPoints(1); |
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| 256 | if (bulges[j]<0) { |
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| 257 | for (int k=arc.size()-1; k>=0; k--) { |
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| 258 | 23942 | vcaballero | ptspol.add(arc.get(k)); |
| 259 | 9720 | azabala | } |
| 260 | ptspol.remove(ptspol.size()-1);
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| 261 | } else {
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| 262 | for (int k=0;k<arc.size();k++) { |
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| 263 | 23942 | vcaballero | ptspol.add(arc.get(k)); |
| 264 | 9720 | azabala | } |
| 265 | ptspol.remove(ptspol.size()-1);
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| 266 | } |
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| 267 | } |
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| 268 | } |
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| 269 | 23942 | vcaballero | List points = new ArrayList(); |
| 270 | 9720 | azabala | for (int j=0;j<ptspol.size();j++) { |
| 271 | 10632 | azabala | points.add(ptspol.get(j)); |
| 272 | 9720 | azabala | } |
| 273 | return points;
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| 274 | } |
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| 275 | } |