com.metsci.glimpse.util.geo.projection.AzimuthalEquidistant Maven / Gradle / Ivy

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/*
 * Copyright (c) 2020, Metron, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Metron, Inc. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL METRON, INC. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.metsci.glimpse.util.geo.projection;

import static java.lang.Math.atan2;
import static java.lang.Math.cos;
import static java.lang.Math.sin;
import static java.lang.Math.sqrt;

import com.metsci.glimpse.util.geo.LatLonGeo;
import com.metsci.glimpse.util.geo.util.DistanceAzimuth;
import com.metsci.glimpse.util.vector.Vector2d;

/**
 * Implementation of GeoProjection that preserves distance and azimuth from the center point.
 * Class instances are immutable.
 *
 * @author borkholder
 */
public class AzimuthalEquidistant implements GeoProjection
{
    private final LatLonGeo origin;

    public AzimuthalEquidistant( LatLonGeo origin )
    {
        this.origin = origin;
    }

    @Override
    public Vector2d project( LatLonGeo latLon )
    {
        DistanceAzimuth distAz = origin.getDistanceAzimuthTo( latLon );
        double x = cos( distAz.getAzimuth( ) ) * distAz.getDistance( );
        double y = sin( distAz.getAzimuth( ) ) * distAz.getDistance( );
        return new Vector2d( x, y );
    }

    @Override
    public LatLonGeo unproject( double x, double y )
    {
        double az = atan2( y, x );
        double dist = sqrt( x * x + y * y );
        return origin.displacedBy( dist, az );
    }

    @Override
    public Vector2d reprojectFrom( double x, double y, GeoProjection fromProjection )
    {
        return project( fromProjection.unproject( x, y ) );
    }

    @Override
    public KinematicVector2d reprojectPosVelFrom( double x, double y, double vx, double vy, GeoProjection fromProjection )
    {
        // TODO: Can we implement this?
        throw new UnsupportedOperationException( );
    }
}