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PlantUML is a component that allows to quickly write :
* sequence diagram,
* use case diagram,
* class diagram,
* activity diagram,
* component diagram,
* state diagram
* object diagram
/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2013, Arnaud Roques
*
* Project Info: http://plantuml.sourceforge.net
*
* This file is part of PlantUML.
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* Original Author: Arnaud Roques
*
* Revision $Revision: 5079 $
*
*/
package net.sourceforge.plantuml.hector;
class UnlinearCompression {
static enum Rounding {
BORDER_1, CENTRAL, BORDER_2;
}
private final double inner;
private final double outer;
public UnlinearCompression(double inner, double outer) {
this.inner = inner;
this.outer = outer;
}
public double compress(double x) {
final double pour = x / (inner + outer);
final double pourInter = Math.floor(pour);
x -= pourInter * (inner + outer);
if (x < inner) {
return pourInter * outer;
}
return x - inner + pourInter * outer;
}
public double uncompress(double x, Rounding rounding) {
final int pourInter = nbOuterBefore(x);
final boolean onBorder = equals(x, pourInter * outer);
if (onBorder && rounding == Rounding.BORDER_1) {
// Nothing
} else if (onBorder && rounding == Rounding.CENTRAL) {
x += inner / 2.0;
} else {
x += inner;
}
x += pourInter * inner;
return x;
}
private static boolean equals(double d1, double d2) {
return Math.abs(d1 - d2) < .001;
}
private int nbOuterBefore(double x) {
final double pour = x / outer;
final int pourInter = (int) Math.floor(pour);
return pourInter;
}
public double[] encounteredSingularities(double from, double to) {
final int outer1 = nbOuterBefore(from) + 1;
int outer2 = nbOuterBefore(to) + 1;
if (equals(to, (outer2 - 1) * outer)) {
outer2--;
}
final double result[];
if (from <= to) {
result = new double[outer2 - outer1];
for (int i = 0; i < result.length; i++) {
result[i] = (outer1 + i) * outer;
}
} else {
result = new double[outer1 - outer2];
for (int i = 0; i < result.length; i++) {
result[i] = (outer1 - 1 - i) * outer;
}
}
return result;
}
public double innerSize() {
return inner;
}
}