source: sasview/sansmodels/src/sans/models/c_extensions/lamellarFF_HG.c @ c1e865a

/**
 * Scattering model for the form factor from a lyotropic lamellar phase
 * @author: Gervaise B. Alina / UTK
 */

#include "lamellarFF_HG.h"
#include <math.h>
#include "libCylinder.h"
#include <stdio.h>
#include <stdlib.h>


/**
 * Function to evaluate 1D scattering function
 * @param pars: parameters of the form factor from a lyotropic lamellar phase
 * @param q: q-value
 * @return: function value
 */
double lamellarFF_HG_analytical_1D(LamellarFF_HGParameters *pars, double q) {
        double dp[7];

        // Fill paramater array
        dp[0] = pars->scale;
        dp[1] = pars->t_length;
        dp[2] = pars->h_thickness;
        dp[3] = pars->sld_tail;
        dp[4] = pars->sld_head;
        dp[5] = pars->sld_solvent;
        dp[6] = pars->background;

        // Call library function to evaluate model
        return LamellarFF_HG(dp, q);
}

double lamellarFF_HG_analytical_2D(LamellarFF_HGParameters *pars, double q, double phi){
        return lamellarFF_HG_analytical_1D(pars,q);
}
double lamellarFF_HG_analytical_2DXY(LamellarFF_HGParameters *pars, double qx, double qy){
        return lamellarFF_HG_analytical_1D(pars,sqrt(qx*qx+qy*qy));
}