source: sasview/sansmodels/src/sans/models/c_models/sld_cal.cpp @ 1810613

/**
 * Scattering model classes
 * The classes use the IGOR library found in
 *   sansmodels/c_extensions/libmultifunc/librefl.h
 */

#include <math.h>
#include "models.hh"
#include "parameters.hh"
#include <stdio.h>
using namespace std;

extern "C" {
        #include "sld_cal.h"
}

SLDCalFunc :: SLDCalFunc() {
        fun_type     = Parameter(0);
        npts_inter   = Parameter(21);
        shell_num        = Parameter(1);
        nu_inter         = Parameter(2.5);
        sld_left         = Parameter(1.0e-06);
        sld_right        = Parameter(2.0e-06);
}

/**
 * Function to evaluate 1D scattering function
 * @param q: q-value
 * @return: function value
 */
double SLDCalFunc :: operator()(double q) {
        SLDCalParameters dp;

        dp.fun_type = fun_type();
        dp.npts_inter = npts_inter();
        dp.shell_num = shell_num();
        dp.nu_inter = nu_inter();
        dp.sld_left = sld_left();
        dp.sld_right = sld_right();

        return sld_cal_analytical_1D(&dp, q);
}

/**
 * Function to evaluate 2D scattering function
 * @param q_x: value of Q along x
 * @param q_y: value of Q along y
 * @return: function value
 */
double SLDCalFunc :: operator()(double qx, double qy) {
        double q = sqrt(qx*qx + qy*qy);
                return (*this).operator()(q);
}

/**
 * Function to evaluate 2D scattering function
 * @param pars: parameters of the cylinder
 * @param q: q-value
 * @param phi: angle phi
 * @return: function value
 */
double SLDCalFunc :: evaluate_rphi(double q, double phi) {
        return (*this).operator()(q);
}
/**
 * Function to calculate effective radius
 * @return: effective radius value
 */
double SLDCalFunc :: calculate_ER() {
//NOT implemented yet!!!
        return 0.0;
}