source: sasview/sansmodels/src/sans/models/c_extensions/prolate.c @ d6da3b1

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Last change on this file since d6da3b1 was 8dc0b746, checked in by Jae Cho <jhjcho@…>, 15 years ago

added 2D and corrected polydisp. parameters…

  • Property mode set to 100644
File size: 1.7 KB
Line 
1/**
2 * Scattering model for a prolate
3 * @author: Gervaise B Alina/ UTK
4 */
5
6#include "prolate.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 prolate
16 * @param q: q-value
17 * @return: function value
18 */
19double prolate_analytical_1D(ProlateParameters *pars, double q) {
20        double dp[8];
21
22        // Fill paramater array
23        dp[0] = pars->scale;
24        dp[1] = pars->major_core;
25        dp[2] = pars->minor_core;
26        dp[3] = pars->major_shell;
27        dp[4] = pars->minor_shell;
28        dp[5] = pars->contrast;
29        dp[6] = pars->sld_solvent;
30        dp[7] = pars->background;
31
32        // Call library function to evaluate model
33        return ProlateForm(dp, q);
34}
35
36/**
37 * Function to evaluate 2D scattering function
38 * @param pars: parameters of the prolate
39 * @param q: q-value
40 * @return: function value
41 */
42double prolate_analytical_2DXY(ProlateParameters *pars, double qx, double qy) {
43        double q;
44        q = sqrt(qx*qx+qy*qy);
45    return prolate_analytical_1D(pars, q);
46}
47
48
49/**
50 * Function to evaluate 2D scattering function
51 * @param pars: parameters of the prolate
52 * @param q: q-value
53 * @param phi: angle phi
54 * @return: function value
55 */
56double prolate_analytical_2D(ProlateParameters *pars, double q, double phi) {
57    return prolate_analytical_1D(pars, q);
58}
59
60/**
61 * Function to evaluate 2D scattering function
62 * @param pars: parameters of the prolate
63 * @param q: q-value
64 * @param q_x: q_x / q
65 * @param q_y: q_y / q
66 * @return: function value
67 */
68//double prolate_analytical_2D_scaled(ProlateParameters *pars, double q, double q_x, double q_y) {
69//
70//      return 1.0;
71//}
72
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