/*
* Copyright (C) 2011-2016, Peter Abeles. All Rights Reserved.
*
* This file is part of Geometric Regression Library (GeoRegression).
*
* 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 georegression.geometry;
import georegression.misc.GrlConstants;
import georegression.misc.test.GeometryUnitTest;
import georegression.struct.EulerType;
import georegression.struct.point.Vector3D_F64;
import org.ejml.data.DenseMatrix64F;
import org.junit.Test;
import java.util.Random;
import static org.junit.Assert.fail;
/**
* @author Peter Abeles
*/
public class TestConvertCoordinates3D_F64 {
Random rand = new Random(234);
/**
* perform the equivalent operation in Euler coordinates and see if it gets the expected results
*/
@Test
public void latlonToUnitVector() {
// check a few specific cases
latlonToUnitVector(0,0);
latlonToUnitVector(0.0, GrlConstants.PId2 );
latlonToUnitVector(0.0, -GrlConstants.PId2 );
latlonToUnitVector(0.0, GrlConstants.PI );
latlonToUnitVector(0.0, -GrlConstants.PI );
latlonToUnitVector( GrlConstants.PId2 ,0);
latlonToUnitVector( -GrlConstants.PId2 ,0);
latlonToUnitVector(0.0, GrlConstants.PId2 );
// random cases now
for (int i = 0; i < 100; i++) {
double lat = rand.nextDouble()*GrlConstants.PI - GrlConstants.PId2;
double lon = rand.nextDouble()*GrlConstants.PI2 - GrlConstants.PI;
latlonToUnitVector(lat, lon);
}
}
private void latlonToUnitVector(double lat, double lon) {
DenseMatrix64F M = ConvertRotation3D_F64.eulerToMatrix(EulerType.YXZ,lat,0,lon,null);
Vector3D_F64 expected = new Vector3D_F64();
GeometryMath_F64.mult(M,new Vector3D_F64(1,0,0),expected);
Vector3D_F64 found = ConvertCoordinates3D_F64.latlonToUnitVector(lat,lon,(Vector3D_F64)null);
GeometryUnitTest.assertEquals(expected, found, GrlConstants.DOUBLE_TEST_TOL);
}
}