/*
* 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.
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package org.apache.commons.math4.geometry.euclidean.twod;
import org.apache.commons.math4.geometry.euclidean.twod.Line;
import org.apache.commons.math4.geometry.euclidean.twod.Segment;
import org.apache.commons.math4.geometry.euclidean.twod.Cartesian2D;
import org.apache.commons.math4.util.FastMath;
import org.junit.Assert;
import org.junit.Test;
public class SegmentTest {
@Test
public void testDistance() {
Cartesian2D start = new Cartesian2D(2, 2);
Cartesian2D end = new Cartesian2D(-2, -2);
Segment segment = new Segment(start, end, new Line(start, end, 1.0e-10));
// distance to center of segment
Assert.assertEquals(FastMath.sqrt(2), segment.distance(new Cartesian2D(1, -1)), 1.0e-10);
// distance a point on segment
Assert.assertEquals(FastMath.sin(Math.PI / 4.0), segment.distance(new Cartesian2D(0, -1)), 1.0e-10);
// distance to end point
Assert.assertEquals(FastMath.sqrt(8), segment.distance(new Cartesian2D(0, 4)), 1.0e-10);
// distance to start point
Assert.assertEquals(FastMath.sqrt(8), segment.distance(new Cartesian2D(0, -4)), 1.0e-10);
}
}