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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.geometry.euclidean.twod;
18  
19  import org.apache.commons.geometry.core.precision.DoublePrecisionContext;
20  import org.apache.commons.geometry.core.precision.EpsilonDoublePrecisionContext;
21  import org.apache.commons.geometry.euclidean.EuclideanTestUtils;
22  import org.apache.commons.geometry.euclidean.oned.Vector1D;
23  import org.junit.Test;
24  
25  public class LineSubsetTest {
26  
27      private static final double TEST_EPS = 1e-10;
28  
29      private static final DoublePrecisionContext TEST_PRECISION =
30              new EpsilonDoublePrecisionContext(TEST_EPS);
31  
32      @Test
33      public void testToSubspaceAndToSpace() {
34          // arrange
35          final LineSubset subset = Lines.fromPointAndAngle(Vector2D.of(0, 1), 0.0, TEST_PRECISION)
36                  .span();
37  
38          // act/assert
39          EuclideanTestUtils.assertCoordinatesEqual(Vector2D.of(2, 1), subset.toSpace(Vector1D.of(2)), TEST_EPS);
40          EuclideanTestUtils.assertCoordinatesEqual(Vector1D.of(2), subset.toSubspace(Vector2D.of(2, 1)), TEST_EPS);
41      }
42  }