source: sasview/sansmodels/src/sans/models/c_extensions/lamellarFF_HG.c @ 8a6d4af

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Last change on this file since 8a6d4af was b4679de, checked in by Jae Cho <jhjcho@…>, 15 years ago

added 2d and model descpt + correction on polydisp. para.

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/**
2 * Scattering model for the form factor from a lyotropic lamellar phase
3 * @author: Gervaise B. Alina / UTK
4 */
5
6#include "lamellarFF_HG.h"
7#include <math.h>
8#include "libCylinder.h"
9#include <stdio.h>
10#include <stdlib.h>
11
12
13/**
14 * Function to evaluate 1D scattering function
15 * @param pars: parameters of the form factor from a lyotropic lamellar phase
16 * @param q: q-value
17 * @return: function value
18 */
19double lamellarFF_HG_analytical_1D(LamellarFF_HGParameters *pars, double q) {
20        double dp[7];
21
22        // Fill paramater array
23        dp[0] = pars->scale;
24        dp[1] = pars->t_length;
25        dp[2] = pars->h_thickness;
26        dp[3] = pars->sld_tail;
27        dp[4] = pars->sld_head;
28        dp[5] = pars->sld_solvent;
29        dp[6] = pars->background;
30
31        // Call library function to evaluate model
32        return LamellarFF_HG(dp, q);
33}
34
35double lamellarFF_HG_analytical_2D(LamellarFF_HGParameters *pars, double q, double phi){
36        return lamellarFF_HG_analytical_1D(pars,q);
37}
38double lamellarFF_HG_analytical_2DXY(LamellarFF_HGParameters *pars, double qx, double qy){
39        return lamellarFF_HG_analytical_1D(pars,sqrt(qx*qx+qy*qy));
40}
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