net.sourceforge.plantuml.geom.kinetic.SegmentCutter Maven / Gradle / Ivy

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/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2020, Arnaud Roques
 *
 * Project Info:  http://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
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 * 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
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 * Original Author:  Arnaud Roques
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 */
package net.sourceforge.plantuml.geom.kinetic;

import java.awt.geom.Point2D;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

class SegmentCutter {

	private final List intermediates = new ArrayList();

	public SegmentCutter(Point2D start, Point2D end, double maxDistance) {
		final double d = end.distance(start);
		if (d <= maxDistance) {
			intermediates.add(end);
			return;
		}
		int nb = 2;
		while (d / nb > maxDistance) {
			nb++;
		}
		final double deltaX = end.getX() - start.getX();
		final double deltaY = end.getY() - start.getY();
		for (int i = 1; i < nb; i++) {
			intermediates.add(new Point2D.Double(start.getX() + i * deltaX / nb, start.getY() + i * deltaY / nb));
		}
		intermediates.add(end);
	}

	public List intermediates() {
		return Collections.unmodifiableList(intermediates);
	}

}