Java example source code file (SubCircleTest.java)

This example Java source code file (SubCircleTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arcsset, circle, regionfactory, splitsubhyperplane, subcircle, subcircletest, test, vector3d

The SubCircleTest.java Java example source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.math3.geometry.spherical.twod;

import org.apache.commons.math3.geometry.euclidean.threed.Rotation;
import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
import org.apache.commons.math3.geometry.partitioning.RegionFactory;
import org.apache.commons.math3.geometry.partitioning.Side;
import org.apache.commons.math3.geometry.partitioning.SubHyperplane.SplitSubHyperplane;
import org.apache.commons.math3.geometry.spherical.oned.ArcsSet;
import org.apache.commons.math3.geometry.spherical.oned.Sphere1D;
import org.apache.commons.math3.util.MathUtils;
import org.junit.Assert;
import org.junit.Test;

public class SubCircleTest {

    @Test
    public void testFullCircle() {
        Circle circle = new Circle(Vector3D.PLUS_K, 1.0e-10);
        SubCircle set = circle.wholeHyperplane();
        Assert.assertEquals(MathUtils.TWO_PI, set.getSize(), 1.0e-10);
        Assert.assertTrue(circle == set.getHyperplane());
        Assert.assertTrue(circle != set.copySelf().getHyperplane());
    }

    @Test
    public void testSide() {

        Circle xzPlane = new Circle(Vector3D.PLUS_J, 1.0e-10);

        SubCircle sc1 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0, 5.0, 6.0);
        Assert.assertEquals(Side.BOTH, sc1.split(xzPlane).getSide());

        SubCircle sc2 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0);
        Assert.assertEquals(Side.MINUS, sc2.split(xzPlane).getSide());

        SubCircle sc3 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 5.0, 6.0);
        Assert.assertEquals(Side.PLUS, sc3.split(xzPlane).getSide());

        SubCircle sc4 = create(Vector3D.PLUS_J, Vector3D.PLUS_K, Vector3D.PLUS_I, 1.0e-10, 5.0, 6.0);
        Assert.assertEquals(Side.HYPER, sc4.split(xzPlane).getSide());

        SubCircle sc5 = create(Vector3D.MINUS_J, Vector3D.PLUS_I, Vector3D.PLUS_K, 1.0e-10, 5.0, 6.0);
        Assert.assertEquals(Side.HYPER, sc5.split(xzPlane).getSide());

    }

    @Test
    public void testSPlit() {

        Circle xzPlane = new Circle(Vector3D.PLUS_J, 1.0e-10);

        SubCircle sc1 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0, 5.0, 6.0);
        SplitSubHyperplane<Sphere2D> split1 = sc1.split(xzPlane);
        ArcsSet plus1  = (ArcsSet) ((SubCircle) split1.getPlus()).getRemainingRegion();
        ArcsSet minus1 = (ArcsSet) ((SubCircle) split1.getMinus()).getRemainingRegion();
        Assert.assertEquals(1, plus1.asList().size());
        Assert.assertEquals(5.0, plus1.asList().get(0).getInf(), 1.0e-10);
        Assert.assertEquals(6.0, plus1.asList().get(0).getSup(), 1.0e-10);
        Assert.assertEquals(1, minus1.asList().size());
        Assert.assertEquals(1.0, minus1.asList().get(0).getInf(), 1.0e-10);
        Assert.assertEquals(3.0, minus1.asList().get(0).getSup(), 1.0e-10);

        SubCircle sc2 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0);
        SplitSubHyperplane<Sphere2D> split2 = sc2.split(xzPlane);
        Assert.assertNull(split2.getPlus());
        ArcsSet minus2 = (ArcsSet) ((SubCircle) split2.getMinus()).getRemainingRegion();
        Assert.assertEquals(1, minus2.asList().size());
        Assert.assertEquals(1.0, minus2.asList().get(0).getInf(), 1.0e-10);
        Assert.assertEquals(3.0, minus2.asList().get(0).getSup(), 1.0e-10);

        SubCircle sc3 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 5.0, 6.0);
        SplitSubHyperplane<Sphere2D> split3 = sc3.split(xzPlane);
        ArcsSet plus3  = (ArcsSet) ((SubCircle) split3.getPlus()).getRemainingRegion();
        Assert.assertEquals(1, plus3.asList().size());
        Assert.assertEquals(5.0, plus3.asList().get(0).getInf(), 1.0e-10);
        Assert.assertEquals(6.0, plus3.asList().get(0).getSup(), 1.0e-10);
        Assert.assertNull(split3.getMinus());

        SubCircle sc4 = create(Vector3D.PLUS_J, Vector3D.PLUS_K, Vector3D.PLUS_I, 1.0e-10, 5.0, 6.0);
        SplitSubHyperplane<Sphere2D> split4 = sc4.split(xzPlane);
        Assert.assertEquals(Side.HYPER, sc4.split(xzPlane).getSide());
        Assert.assertNull(split4.getPlus());
        Assert.assertNull(split4.getMinus());

        SubCircle sc5 = create(Vector3D.MINUS_J, Vector3D.PLUS_I, Vector3D.PLUS_K, 1.0e-10, 5.0, 6.0);
        SplitSubHyperplane<Sphere2D> split5 = sc5.split(xzPlane);
        Assert.assertEquals(Side.HYPER, sc5.split(xzPlane).getSide());
        Assert.assertNull(split5.getPlus());
        Assert.assertNull(split5.getMinus());

    }

    @Test
    public void testSideSplitConsistency() {

        double tolerance = 1.0e-6;
        Circle hyperplane = new Circle(new Vector3D(9.738804529764676E-5, -0.6772824575010357, -0.7357230887208355),
                                       tolerance);
        SubCircle sub = new SubCircle(new Circle(new Vector3D(2.1793884139073498E-4, 0.9790647032675541, -0.20354915700704285),
                                                 tolerance),
                                      new ArcsSet(4.7121441684170700, 4.7125386635004760, tolerance));
        SplitSubHyperplane<Sphere2D> split = sub.split(hyperplane);
        Assert.assertNotNull(split.getMinus());
        Assert.assertNull(split.getPlus());
        Assert.assertEquals(Side.MINUS, sub.split(hyperplane).getSide());

    }

    private SubCircle create(Vector3D pole, Vector3D x, Vector3D y,
                             double tolerance, double ... limits) {
        RegionFactory<Sphere1D> factory = new RegionFactory();
        Circle circle = new Circle(pole, tolerance);
        Circle phased =
                (Circle) Circle.getTransform(new Rotation(circle.getXAxis(), circle.getYAxis(), x, y)).apply(circle);
        ArcsSet set = (ArcsSet) factory.getComplement(new ArcsSet(tolerance));
        for (int i = 0; i < limits.length; i += 2) {
            set = (ArcsSet) factory.union(set, new ArcsSet(limits[i], limits[i + 1], tolerance));
        }
        return new SubCircle(phased, set);
    }

}