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For interconverting spatial locations between representations
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/**
@author David Shen
*/
// SRM SDK Release 4.4.0 - January 21, 2010

// - SRM spec. 4.4

/*
 *                             NOTICE
 * 
 * This software is provided openly and freely for use in representing and
 * interchanging environmental data & databases.
 * 
 * This software was developed for use by the United States Government with
 * unlimited rights.  The software was developed under contract
 * DASG60-02-D-0006 TO-193 by Science Applications International Corporation.
 * The software is unclassified and is deemed as Distribution A, approved
 * for Public Release.
 * 
 * Use by others is permitted only upon the ACCEPTANCE OF THE TERMS AND
 * CONDITIONS, AS STIPULATED UNDER THE FOLLOWING PROVISIONS:
 * 
 *    1. Recipient may make unlimited copies of this software and give
 *       copies to other persons or entities as long as the copies contain
 *       this NOTICE, and as long as the same copyright notices that
 *       appear on, or in, this software remain.
 * 
 *    2. Trademarks. All trademarks belong to their respective trademark
 *       holders.  Third-Party applications/software/information are
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 *       or adaptation of this software, including versions created from
 *       the translation and/or reverse engineering of the software design.
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 *       AGREEMENT and NOTICE is furnished along with the software and
 *       /or software system utilizing this software.
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 *       All revisions, modifications, created by the Recipient, to this
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 * 
 *         SMDC
 *         Attention SEDRIS (TO193) TPOC
 *         P.O. Box 1500
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 * 
 *    5. No Warranty. This software is being delivered to you AS IS
 *       and there is no warranty, EXPRESS or IMPLIED, as to its use
 *       or performance.
 * 
 *       The RECIPIENT ASSUMES ALL RISKS, KNOWN AND UNKNOWN, OF USING
 *       THIS SOFTWARE.  The DEVELOPER EXPRESSLY DISCLAIMS, and the
 *       RECIPIENT WAIVES, ANY and ALL PERFORMANCE OR RESULTS YOU MAY
 *       OBTAIN BY USING THIS SOFTWARE OR DOCUMENTATION.  THERE IS
 *       NO WARRANTY, EXPRESS OR, IMPLIED, AS TO NON-INFRINGEMENT OF
 *       THIRD PARTY RIGHTS, MERCHANTABILITY, OR FITNESS FOR ANY
 *       PARTICULAR PURPOSE.  IN NO EVENT WILL THE DEVELOPER, THE
 *       UNITED STATES GOVERNMENT OR ANYONE ELSE ASSOCIATED WITH THE
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 */

/*
 * COPYRIGHT 2010, SCIENCE APPLICATIONS INTERNATIONAL CORPORATION.
 *                 ALL RIGHTS RESERVED.
 * 
 */

// SRM_OTHERS_GOES_HERE

package SRM;

public abstract class SphereConv extends Conversions
{
    protected SphereConv(SRM_SRFT_Code src, SRM_SRFT_Code[] dest)
    {
        super (src, dest);
    }


/*
 *----------------------------------------------------------------------------
 *
 * ToSphere routines
 *
 *----------------------------------------------------------------------------
 */
    protected SRM_Coordinate_Valid_Region_Code toCcen
    (
        BaseSRF  srcSrf,
        BaseSRF  destSrf,
        double[] source_generic_coord,
        double[] dest_generic_coord
    ) throws SrmException
    {
        SRM_Coordinate_Valid_Region_Code retValid =
            SRM_Coordinate_Valid_Region_Code.COORDVALRGN_VALID;

        double lambda = source_generic_coord[0];
        double theta  = source_generic_coord[1];
        double rho    = source_generic_coord[2];

        // x
        dest_generic_coord[0] = rho * Math.cos(theta) * Math.cos(lambda);

        // y
        dest_generic_coord[1] = rho * Math.cos(theta) * Math.sin(lambda);

        // z
        dest_generic_coord[2] = rho * Math.sin(theta);

        return retValid;
    }
}