mirror of https://github.com/octoleo/plantuml.git
97 lines
2.9 KiB
Java
97 lines
2.9 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: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.real;
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import net.sourceforge.plantuml.log.Logger;
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class PositiveForce {
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private final Real fixedPoint;
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private final RealMoveable movingPoint;
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private final double minimunDistance;
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private final boolean trace = false;
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private final Throwable creationPoint;
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public PositiveForce(Real fixedPoint, RealMoveable movingPoint, double minimunDistance) {
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if (fixedPoint == movingPoint) {
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throw new IllegalArgumentException();
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}
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this.fixedPoint = fixedPoint;
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this.movingPoint = movingPoint;
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this.minimunDistance = minimunDistance;
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this.creationPoint = new Throwable();
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this.creationPoint.fillInStackTrace();
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}
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@Override
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public String toString() {
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return "PositiveForce fixed=" + fixedPoint + " moving=" + movingPoint + " min=" + minimunDistance;
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}
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public boolean apply() {
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if (trace) {
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System.err.println("apply " + this);
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}
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final double movingPointValue = movingPoint.getCurrentValue();
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final double fixedPointValue;
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try {
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fixedPointValue = fixedPoint.getCurrentValue();
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} catch (IllegalStateException e) {
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Logger.error("Pb with force " + this);
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Logger.error("Pb with force " + this);
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Logger.error("This force has been created here:");
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Logger.error(creationPoint);
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Logger.error("The fixed point has been created here: " + fixedPoint);
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fixedPoint.printCreationStackTrace();
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throw e;
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}
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final double distance = movingPointValue - fixedPointValue;
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final double diff = distance - minimunDistance;
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if (diff >= 0) {
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if (trace) {
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System.err.println("Not using ");
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}
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return false;
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}
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if (trace) {
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System.err.println("moving " + (-diff) + " " + movingPoint);
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}
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movingPoint.move(-diff);
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return true;
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}
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}
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