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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:
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 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
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 *       documentation and/or other materials provided with the distribution.
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 *       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;
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/*
 *
 *  SBIR Data Rights
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 *  in Noncommercial Technical Data and Computer Software-Small Business
 *  Innovative Research (SBIR) Program clause contained in the above identified
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 *  (End of legend)
 *   Metron Incorporated.  All rights reserved.
 * /
 */

package com.metsci.glimpse.util.geo.projection;

import com.metsci.glimpse.util.geo.LatLonGeo;
import com.metsci.glimpse.util.math.fast.PolynomialApprox;

/**
 * Implementation of GeoProjection via a plane which is tangent to the Earth and maps x, y
 * coordinates on the plane to/from lat/lon pairs.  Class instances are immutable.
 *
 * This version uses a polynomial approximation to arctangent instead of Math.atan2 for
 * improved performance at some cost to accuracy.
 *
 * Created by B. Moskowitz on 6/17/2015.
 */
public class PolynomialTangentPlane extends TangentPlane
{
    public PolynomialTangentPlane( LatLonGeo latLon )
    {
        super( latLon );
    }

    public PolynomialTangentPlane( LatLonGeo latLon, double tangentPointOnPlaneX, double tangentPointOnPlaneY )
    {
        super( latLon, tangentPointOnPlaneX, tangentPointOnPlaneY );
    }

    @Override
    protected double calcAtan2( double y, double x )
    {
        return PolynomialApprox.atan2( y, x );
    }
}