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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the MIT License.
 *
 * See http://opensource.org/licenses/MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this MIT license.
 *
 * The generated images can then be used without any reference to the MIT license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.klimt.drawing.hand;

import java.util.Random;

import net.sourceforge.plantuml.klimt.UPath;
import net.sourceforge.plantuml.klimt.geom.USegment;
import net.sourceforge.plantuml.klimt.geom.USegmentType;
import net.sourceforge.plantuml.klimt.geom.XCubicCurve2D;
import net.sourceforge.plantuml.klimt.geom.XPoint2D;

public class UPathHand {

	private final UPath path;
	private final double defaultVariation = 4.0;

	public UPathHand(UPath source, Random rnd) {

		final UPath result = UPath.none();

		XPoint2D last = new XPoint2D(0, 0);

		for (USegment segment : source) {
			final USegmentType type = segment.getSegmentType();
			if (type == USegmentType.SEG_MOVETO) {
				final double x = segment.getCoord()[0];
				final double y = segment.getCoord()[1];
				result.moveTo(x, y);
				last = new XPoint2D(x, y);
			} else if (type == USegmentType.SEG_CUBICTO) {
				final double x2 = segment.getCoord()[4];
				final double y2 = segment.getCoord()[5];
				final HandJiggle jiggle = HandJiggle.create(last, 2.0, rnd);

				final XCubicCurve2D tmp = new XCubicCurve2D(last.getX(), last.getY(), segment.getCoord()[0],
						segment.getCoord()[1], segment.getCoord()[2], segment.getCoord()[3], x2, y2);
				jiggle.curveTo(tmp);
				jiggle.appendTo(result);
				last = new XPoint2D(x2, y2);
			} else if (type == USegmentType.SEG_LINETO) {
				final double x = segment.getCoord()[0];
				final double y = segment.getCoord()[1];
				final HandJiggle jiggle = new HandJiggle(last.getX(), last.getY(), defaultVariation, rnd);
				jiggle.lineTo(x, y);
				for (USegment seg2 : jiggle.toUPath())
					if (seg2.getSegmentType() == USegmentType.SEG_LINETO)
						result.lineTo(seg2.getCoord()[0], seg2.getCoord()[1]);

				last = new XPoint2D(x, y);
			} else if (type == USegmentType.SEG_ARCTO) {
				final double x = segment.getCoord()[5];
				final double y = segment.getCoord()[6];
				result.lineTo(x, y);
				last = new XPoint2D(x, y);
			} else {
				this.path = source;
				return;
			}
		}
		this.path = result;
		this.path.setDeltaShadow(source.getDeltaShadow());
	}

	public UPath getHanddrawn() {
		return this.path;
	}

}