source: sasview/sansmodels/src/sans/models/c_extensions/DiamEllip.c @ 0ab485b

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Last change on this file since 0ab485b was 5eb9154, checked in by Jae Cho <jhjcho@…>, 15 years ago

calculation of the effective radius are added

  • Property mode set to 100644
File size: 942 bytes
Line 
1/**
2 * SquareWell Structure factor
3 * @author: Jae Hie Cho / UTK
4 */
5
6#include "DiamEllip.h"
7#include "libStructureFactor.h"
8#include <math.h>
9
10
11/**
12 * Function to evaluate 1D scattering function
13 * @param pars: parameters of the DiaEllip
14 * @param q: q-value
15 * @return: 2 virial coefficient value
16 */
17double DiamEllips_analytical_1D(DiamEllipsParameters *pars, double q) {
18        double ell_a, ell_b;
19
20        ell_a = pars->radius_a;
21        ell_b = pars->radius_b;
22        return DiamEllip(ell_a, ell_b);
23}
24
25/**
26 * Function to evaluate 2D scattering function
27 * @param pars: parameters of the RadiEllip
28 * @param q: q-value
29 * @return: function value
30 */
31double DiamEllips_analytical_2D(DiamEllipsParameters *pars, double q, double phi) {
32        return DiamEllips_analytical_1D(pars,q);
33}
34
35double DiamEllips_analytical_2DXY(DiamEllipsParameters *pars, double qx, double qy){
36        return DiamEllips_analytical_1D(pars,sqrt(qx*qx+qy*qy));
37}
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