source: sasview/sansmodels/igor_wrapper/src/disp_cylinder.c @ 2f5d888

/**
 * Scattering intensity for dispersed CCylinderModel
 * 
 * WARNING: THIS FILE WAS GENERATED BY IGORGENERATOR.PY
 *          DO NOT MODIFY THIS FILE, MODIFY cylinder.h
 *          AND RE-RUN THE GENERATOR SCRIPT
 *
 * This code was written as part of the DANSE project
 * http://danse.us/trac/sans/
 *
 * Copyright 2007: University of Tennessee, for the DANSE project
 */

#include "cylinder.h"
#include <math.h>
#include "libCylinder.h"
#include "libSphere.h"
#include "c_disperser.h"

/**
 * Function to evaluate 2D scattering function
 * 
 * @param dp: parameters of the function
 * @param q: q-value
 * @param phi: angle of the q-vector in the plane of the detector, relative to q_x
 * @return: function value
 */
double oriented_cylinder_2D(double pars[], double q, double phi) {
        CylinderParameters danse_pars;
        
    // List of default parameters:
    //         pars[0]:   scale           = 1.0 
    //         pars[1]:   radius          = 20.0 A
    //         pars[2]:   length          = 400.0 A
    //         pars[3]:   contrast        = 3e-06 A-2
    //         pars[4]:   background      = 0.0 cm-1
    //         pars[5]:   cyl_theta       = 1.0 rad
    //         pars[6]:   cyl_phi         = 1.0 rad
    danse_pars.scale = pars[0];
    danse_pars.radius = pars[1];
    danse_pars.length = pars[2];
    danse_pars.contrast = pars[3];
    danse_pars.background = pars[4];
    danse_pars.cyl_theta = pars[5];
    danse_pars.cyl_phi = pars[6];

        return cylinder_analytical_2D(&danse_pars, q, phi);             
}
        
/**
 * Function to evaluate dispersed 2D scattering function
 * 
 * @param dp: parameters of the function
 * @param q: q-value
 * @param phi: angle of the q-vector in the plane of the detector, relative to q_x
 * @return: function value
 * 
     // List of default parameters:
    //         pars[0]:   scale           = 1.0 
    //         pars[1]:   radius          = 20.0 A
    //         pars[2]:   length          = 400.0 A
    //         pars[3]:   contrast        = 3e-06 A-2
    //         pars[4]:   background      = 0.0 cm-1
    //         pars[5]:   cyl_theta       = 1.0 rad
    //         pars[6]:   cyl_phi         = 1.0 rad

    //         pars[7]:   dispersion of radius
    //         pars[8]:   dispersion of cyl_theta
    //         pars[9]:   dispersion of cyl_phi
    //         pars[10]:   number of points in dispersion curve

 */
double disperse_cylinder_analytical_2D(double dp[], double q, double phi) {
        int paramList[3];
        double sigmaList[3];
        int npts;
        int i;
        double pars[11];
        
    // radius
    paramList[0] = 1;
    // cyl_theta
    paramList[1] = 5;
    // cyl_phi
    paramList[2] = 6;

    sigmaList[0] = dp[7];
    sigmaList[1] = dp[8];
    sigmaList[2] = dp[9];

    npts = (int)(floor(dp[10]));


        // Internal copy of parameters
        for(i=0; i<11; i++ ) {
                pars[i] = dp[i];
        }

        return c_disperser( &oriented_cylinder_2D, pars, 3, 
                                        paramList, sigmaList, npts, q, phi ); 

        
}