/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.algorithm;
import org.locationtech.jts.geom.Coordinate;
import junit.framework.TestCase;
import junit.textui.TestRunner;
/**
* @version 1.7
*/
public class AngleTest extends TestCase {
private static final double TOLERANCE = 1E-5;
public static void main(String args[]) {
TestRunner.run(AngleTest.class);
}
public AngleTest(String name) { super(name); }
public void testAngle() throws Exception
{
assertEquals(Angle.angle(new Coordinate(10,0)), 0.0, TOLERANCE);
assertEquals(Angle.angle(new Coordinate(10,10)), Math.PI/4, TOLERANCE);
assertEquals(Angle.angle(new Coordinate(0,10)), Math.PI/2, TOLERANCE);
assertEquals(Angle.angle(new Coordinate(-10,10)), 0.75*Math.PI, TOLERANCE);
assertEquals(Angle.angle(new Coordinate(-10,0)), Math.PI, TOLERANCE);
assertEquals(Angle.angle(new Coordinate(-10,-0.1)), -3.131592986903128, TOLERANCE);
assertEquals(Angle.angle(new Coordinate(-10,-10)), -0.75*Math.PI, TOLERANCE);
}
public void testIsAcute() throws Exception
{
assertEquals(Angle.isAcute(new Coordinate(10,0), new Coordinate(0,0), new Coordinate(5,10)), true);
assertEquals(Angle.isAcute(new Coordinate(10,0), new Coordinate(0,0), new Coordinate(5,-10)), true);
// angle of 0
assertEquals(Angle.isAcute(new Coordinate(10,0), new Coordinate(0,0), new Coordinate(10,0)), true);
assertEquals(Angle.isAcute(new Coordinate(10,0), new Coordinate(0,0), new Coordinate(-5,10)), false);
assertEquals(Angle.isAcute(new Coordinate(10,0), new Coordinate(0,0), new Coordinate(-5,-10)), false);
}
public void testNormalizePositive() throws Exception
{
assertEquals(Angle.normalizePositive(0.0), 0.0, TOLERANCE);
assertEquals(Angle.normalizePositive(-0.5*Math.PI), 1.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(-Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(-1.5*Math.PI), .5*Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(-2*Math.PI), 0.0, TOLERANCE);
assertEquals(Angle.normalizePositive(-2.5*Math.PI), 1.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(-3*Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(-4 * Math.PI), 0.0, TOLERANCE);
assertEquals(Angle.normalizePositive(0.5*Math.PI), 0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(1.5*Math.PI), 1.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(2*Math.PI), 0.0, TOLERANCE);
assertEquals(Angle.normalizePositive(2.5*Math.PI), 0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(3*Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalizePositive(4 * Math.PI), 0.0, TOLERANCE);
}
public void testNormalize() throws Exception
{
assertEquals(Angle.normalize(0.0), 0.0, TOLERANCE);
assertEquals(Angle.normalize(-0.5*Math.PI), -0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalize(-Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalize(-1.5*Math.PI), .5*Math.PI, TOLERANCE);
assertEquals(Angle.normalize(-2*Math.PI), 0.0, TOLERANCE);
assertEquals(Angle.normalize(-2.5*Math.PI), -0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalize(-3*Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalize(-4 * Math.PI), 0.0, TOLERANCE);
assertEquals(Angle.normalize(0.5*Math.PI), 0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalize(Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalize(1.5*Math.PI), -0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalize(2*Math.PI), 0.0, TOLERANCE);
assertEquals(Angle.normalize(2.5*Math.PI), 0.5*Math.PI, TOLERANCE);
assertEquals(Angle.normalize(3*Math.PI), Math.PI, TOLERANCE);
assertEquals(Angle.normalize(4 * Math.PI), 0.0, TOLERANCE);
}
}