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166 lines
4.6 KiB
Java
166 lines
4.6 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2023, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Adrian Vogt
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*
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*/
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package net.sourceforge.plantuml.ugraphic.hand;
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import java.awt.geom.CubicCurve2D;
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import java.awt.geom.Point2D;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Random;
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import net.sourceforge.plantuml.ugraphic.UPath;
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import net.sourceforge.plantuml.ugraphic.UPolygon;
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public class HandJiggle {
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private final Collection<Point2D> points = new ArrayList<>();
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private double startX;
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private double startY;
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private final double defaultVariation;
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private final Random rnd;
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private double randomMe() {
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return rnd.nextDouble();
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}
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public HandJiggle(double startX, double startY, double defaultVariation, Random rnd) {
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this.startX = startX;
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this.startY = startY;
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this.defaultVariation = defaultVariation;
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this.rnd = rnd;
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points.add(new Point2D.Double(startX, startY));
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}
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public static HandJiggle create(Point2D start, double defaultVariation, Random rnd) {
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return new HandJiggle(start.getX(), start.getY(), defaultVariation, rnd);
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}
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public void lineTo(Point2D end) {
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lineTo(end.getX(), end.getY());
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}
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public void arcTo(double angle0, double angle1, double centerX, double centerY, double rx, double ry) {
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lineTo(pointOnCircle(centerX, centerY, (angle0 + angle1) / 2, rx, ry));
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lineTo(pointOnCircle(centerX, centerY, angle1, rx, ry));
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}
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private static Point2D pointOnCircle(double centerX, double centerY, double angle, double rx, double ry) {
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final double x = centerX + Math.cos(angle) * rx;
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final double y = centerY + Math.sin(angle) * ry;
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return new Point2D.Double(x, y);
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}
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public void lineTo(final double endX, final double endY) {
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final double diffX = Math.abs(endX - startX);
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final double diffY = Math.abs(endY - startY);
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final double distance = Math.sqrt(diffX * diffX + diffY * diffY);
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if (distance < 0.001) {
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return;
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}
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int segments = (int) Math.round(distance / 10);
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double variation = defaultVariation;
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if (segments < 5) {
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segments = 5;
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variation /= 3;
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}
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final double stepX = Math.signum(endX - startX) * diffX / segments;
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final double stepY = Math.signum(endY - startY) * diffY / segments;
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final double fx = diffX / distance;
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final double fy = diffY / distance;
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for (int s = 0; s < segments; s++) {
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double x = stepX * s + startX;
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double y = stepY * s + startY;
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final double offset = (randomMe() - 0.5) * variation;
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points.add(new Point2D.Double(x - offset * fy, y - offset * fx));
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}
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points.add(new Point2D.Double(endX, endY));
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this.startX = endX;
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this.startY = endY;
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}
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public void curveTo(CubicCurve2D curve) {
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final double flatness = curve.getFlatness();
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final double dist = curve.getP1().distance(curve.getP2());
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if (flatness > 0.1 && dist > 20) {
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final CubicCurve2D left = new CubicCurve2D.Double();
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final CubicCurve2D right = new CubicCurve2D.Double();
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curve.subdivide(left, right);
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curveTo(left);
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curveTo(right);
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return;
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}
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lineTo(curve.getP2());
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}
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public UPolygon toUPolygon() {
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final UPolygon result = new UPolygon();
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for (Point2D p : points) {
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result.addPoint(p.getX(), p.getY());
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}
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return result;
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}
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public UPath toUPath() {
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UPath path = null;
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for (Point2D p : points) {
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if (path == null) {
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path = new UPath();
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path.moveTo(p);
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} else {
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path.lineTo(p);
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}
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}
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if (path == null) {
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throw new IllegalStateException();
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}
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return path;
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}
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public void appendTo(UPath result) {
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for (Point2D p : points) {
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result.lineTo(p);
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}
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}
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}
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