/* $Id: cpl_photom-test.c,v 1.17 2008/02/07 10:54:01 llundin Exp $
 *
 * This file is part of the ESO Common Pipeline Library
 * Copyright (C) 2001-2004 European Southern Observatory
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * $Author: llundin $
 * $Date: 2008/02/07 10:54:01 $
 * $Revision: 1.17 $
 * $Name:  $
 */

/*-----------------------------------------------------------------------------
                                   Includes
 -----------------------------------------------------------------------------*/

#include <stdio.h>

#include "cpl_polynomial.h"
#include "cpl_bivector.h"
#include "cpl_photom.h"
#include "cpl_type.h"
#include "cpl_tools.h"
#include "cpl_memory.h"

/*-----------------------------------------------------------------------------
                                   Defines
 -----------------------------------------------------------------------------*/

#ifndef FUNCTION_SIZE
#define FUNCTION_SIZE  1024
#endif

/*-----------------------------------------------------------------------------
                                  Main
 -----------------------------------------------------------------------------*/
int main(void)
{
    cpl_polynomial * poly1 ;
    cpl_bivector   * fun ;
    cpl_bivector   * trans;
    FILE           * ftrans;
    const double     temp = 253;
    int              i;
    const int        half_search = FUNCTION_SIZE/2;
    cpl_vector     * vxc;


    cpl_test_init(PACKAGE_BUGREPORT, CPL_MSG_WARNING);

    /* Insert tests below */

    /* A black-body with T=253K should emit mostly in the range [2;50[ micron */
    cpl_test_nonnull( poly1 = cpl_polynomial_new(1) );
    i = 0;
    cpl_polynomial_set_coeff(poly1, &i, 2e-6);
    i++;
    cpl_polynomial_set_coeff(poly1, &i, 48e-6/FUNCTION_SIZE);

    fun = cpl_bivector_new(FUNCTION_SIZE);

    cpl_test_zero( cpl_vector_fill_polynomial(cpl_bivector_get_x(fun),
                                                   poly1, 0, 1) );

    cpl_test_zero(cpl_photom_fill_blackbody(cpl_bivector_get_y(fun),
                                                 CPL_UNIT_PHOTONRADIANCE,
                                                 cpl_bivector_get_x(fun),
                                                 CPL_UNIT_LENGTH, temp));

    cpl_test( ftrans = fopen("planck1.txt", "w") );
    cpl_bivector_dump(fun,ftrans);
    fclose(ftrans);

    cpl_test_zero(cpl_photom_fill_blackbody(cpl_bivector_get_y(fun),
                                                 CPL_UNIT_ENERGYRADIANCE,
                                                 cpl_bivector_get_x(fun),
                                                 CPL_UNIT_LENGTH, temp));

    trans = cpl_bivector_new(FUNCTION_SIZE);

    cpl_vector_copy(cpl_bivector_get_x(trans),cpl_bivector_get_x(fun));

    cpl_test_zero(cpl_photom_fill_blackbody(cpl_bivector_get_y(trans),
                                                 CPL_UNIT_LESS,
                                                 cpl_bivector_get_x(trans),
                                                 CPL_UNIT_LENGTH, temp));

    cpl_msg_info("", "%g K Black-Body radiation peaks at [m]: %g (%g)", temp,
                 CPL_PHYS_Wien/temp,
                 cpl_vector_get_max(cpl_bivector_get_y(trans)));

    vxc = cpl_vector_new(2*half_search + 1);

    cpl_test( cpl_vector_correlate(vxc, cpl_bivector_get_y(trans),
                                            cpl_bivector_get_y(fun))
                       == half_search );

    cpl_test( 1 - cpl_vector_get(vxc, half_search)
                       < FUNCTION_SIZE * DBL_EPSILON);
    cpl_vector_delete(vxc);

    cpl_test( ftrans = fopen("planck2.txt", "w") );
    cpl_bivector_dump(trans,ftrans);
    fclose(ftrans);

    cpl_polynomial_delete(poly1);
    cpl_bivector_delete(fun);
    cpl_bivector_delete(trans);

    /* End of tests */
    return cpl_test_end(0);

}