net.sourceforge.plantuml.klimt.drawing.hand.UPathHand Maven / Gradle / Ivy

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/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
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 * This file is part of PlantUML.
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 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
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 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
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 * Original Author:  Adrian Vogt
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 */
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;
	}

}