source: sasview/sansmodels/src/sans/models/c_extensions/sphere.h @ 8a6d4af

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Last change on this file since 8a6d4af was 1ed3834, checked in by Jae Cho <jhjcho@…>, 16 years ago

unit symbol Angst. back to A and re-organized model descriptions

  • Property mode set to 100644
File size: 1.3 KB
Line 
1#if !defined(sphere_h)
2#define sphere_h
3
4/**
5 * Structure definition for sphere parameters
6 */
7 //[PYTHONCLASS] = SphereModel
8 //[DISP_PARAMS] = radius
9 //[DESCRIPTION] =<text>P(q)=(scale/V)*[3V(scatter_sld-solvent_sld)*(sin(qR)-qRcos(qR))
10 //                                             /(qR)^3]^(2)+bkg
11 //
12 //                             bkg:background, R: radius of sphere
13 //                             V:The volume of the scatter
14 //                             contrast:SLD difference between
15 //                             scatter and solvent
16 //                             scatter_sld: the SLD of the scatter
17 //                             solvent_sld: the SLD of the solvent
18 //
19 //             </text>
20 //[FIXED]=  radius.width
21 //[ORIENTATION_PARAMS]= <text> </text>
22
23typedef struct {
24    /// Scale factor
25    //  [DEFAULT]=scale= 1.0
26    double scale;
27
28    /// Radius of sphere [A]
29    //  [DEFAULT]=radius=60.0 [A]
30    double radius;
31
32    /// Contrast [1/Ų]
33    //  [DEFAULT]=contrast= 1.0e-6 [1/A²]
34    double contrast;
35
36        /// Incoherent Background [1/cm]
37        //  [DEFAULT]=background=0 [1/cm]
38        double background;
39} SphereParameters;
40
41
42
43/// 1D scattering function
44double sphere_analytical_1D(SphereParameters *pars, double q);
45
46/// 2D scattering function
47double sphere_analytical_2D(SphereParameters *pars, double q, double phi);
48double sphere_analytical_2DXY(SphereParameters *pars, double qx, double qy);
49
50#endif
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