EllipseTest.java

/* Copyright (c) 2011 Danish Maritime Authority.
 *
 * Licensed 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 net.maritimecloud.util.geometry;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.List;

import org.junit.Test;

public class EllipseTest {

    @Test
    public void testIntersectsSame() {
        Ellipse ellipse1 = new Ellipse(null, 0.0f, 0.0f, 5.0, 2.5f, 0.0f);
        Ellipse ellipse2 = ellipse1;

        assertTrue(ellipse1.intersects(ellipse2));
        assertTrue(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testIntersectsNot() {
        Ellipse ellipse1 = new Ellipse(null, 0.0f, 0.0f, 5.0, 2.5f, 0.0f);
        Ellipse ellipse2 = new Ellipse(null, 10.0f, 0.0f, 4.0, 2.5f, 0.0f);

        assertFalse(ellipse1.intersects(ellipse2));
        assertFalse(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testIntersects() {
        Ellipse ellipse1 = new Ellipse(null, 2.0f, 0.0f, 5.0, 2.5f, 0.0f);
        Ellipse ellipse2 = new Ellipse(null, 10.0f, 0.0f, 4.0, 2.5f, 0.0f);

        assertTrue(ellipse1.intersects(ellipse2));
        assertTrue(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testIntersectsExcel1() {
        Ellipse ellipse1 = new Ellipse(null, 0.0f, 0.0f, 100.0f, 40.0f, 45.0f);
        Ellipse ellipse2 = new Ellipse(null, 90.0f, 30.0f, 50.0f, 25.0f, 150.0f);

        assertTrue(ellipse1.intersects(ellipse2));
        assertTrue(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testIntersectsExcel2() {
        Ellipse ellipse1 = new Ellipse(null, 0.0f, 0.0f, 100.0f, 40.0f, 45.0f);
        Ellipse ellipse2 = new Ellipse(null, 80.0f, 30.0f, 50.0f, 25.0f, 150.0f);

        assertTrue(ellipse1.intersects(ellipse2));
        assertTrue(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testIntersectsExcel3() {
        Ellipse ellipse1 = new Ellipse(null, 0.0f, 0.0f, 100.0f, 40.0f, 62.0f);
        Ellipse ellipse2 = new Ellipse(null, 118.0, 0.0f, 100.0f, 50.0f, 30.0f);

        assertTrue(ellipse1.intersects(ellipse2));
        assertTrue(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testIntersectsExcel1Not() {
        Ellipse ellipse1 = new Ellipse(null, 0.0f, 0.0f, 100.0f, 40.0f, 45.0f);
        Ellipse ellipse2 = new Ellipse(null, 130.0f, 30.0f, 50.0f, 25.0f, 150.0f);

        assertFalse(ellipse1.intersects(ellipse2));
        assertFalse(ellipse2.intersects(ellipse1));
    }

    @Test
    public void testSamplePerimeter() {
        Ellipse ellipse = new Ellipse(Position.create(57.700633, 11.673650), -70.52481315529923, -54.37141463499117,
                184.0, 40.0, 215.6999969482422);

        List<Position> positions = ellipse.samplePerimeter(4);
        assertEquals(4, positions.size());
        assertEquals(Position.create(57.699175095853860, 11.669940032389967), positions.get(0));
        assertEquals(Position.create(57.699850143182594, 11.672854124920430), positions.get(1));
        assertEquals(Position.create(57.701110703232146, 11.674980889575464), positions.get(2));
        assertEquals(Position.create(57.700435704758796, 11.672066655989266), positions.get(3));
    }

}