source: sasview/sansmodels/src/sans/models/c_extensions/flexcyl_ellipX.h @ 8cf19e9

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Last change on this file since 8cf19e9 was c724ccd, checked in by Jae Cho <jhjcho@…>, 15 years ago

More models added and correction of Wrappergenerator on model parameter value precision

  • Property mode set to 100644
File size: 1.7 KB
Line 
1#if !defined(flexcyl_ellipX_h)
2#define flexcyl_ellipX_h
3
4/** Structure definition for Flexible cylinder w/ EllipX parameters
5 * [PYTHONCLASS] = FlexCylEllipXModel
6 * [DISP_PARAMS] = length, kuhn_length, radius, axis_ratio
7   [DESCRIPTION] = <text> Note : scale and contrast=sldCyl-sldSolv are both multiplicative factors in the
8                model and are perfectly correlated. One or
9                both of these parameters must be held fixed
10                during model fitting.
11                </text>
12        [FIXED]= <text>length.width; kuhn_length.width; radius.width; axis_ratio.width</text>
13        [ORIENTATION_PARAMS]= <text></text>
14
15
16 **/
17typedef struct {
18    /// Scale factor
19    //  [DEFAULT]=scale=1.0
20    double scale;
21    /// Length of the flexible cylinder [A]
22    //  [DEFAULT]=length=1000 [A]
23    double length;
24        /// Kuhn length of the flexible cylinder [A]
25    //  [DEFAULT]=kuhn_length=100 [A]
26    double kuhn_length;
27        /// Radius of the flexible cylinder [A]
28    //  [DEFAULT]=radius=20.0 [A]
29    double radius;
30    /// axis_ratio (major_radius/radius
31    //  [DEFAULT]=axis_ratio=1.5
32    double axis_ratio;
33    /// SLD of cylinder [1/A^(2)]
34    //  [DEFAULT]=sldCyl=1.0e-6 [1/A^(2)]
35    double sldCyl;
36    /// SLD of solvent [1/A^(2)]
37    //  [DEFAULT]=sldSolv=6.3e-6 [1/A^(2)]
38    double sldSolv;
39        /// Incoherent Background [1/cm]
40        //  [DEFAULT]=background=0.0001 [1/cm]
41        double background;
42} FlexCylEXParameters;
43
44
45
46/// 1D scattering function
47double flexcyl_ellipX_analytical_1D(FlexCylEXParameters *pars, double q);
48
49/// 2D scattering function
50double flexcyl_ellipX_analytical_2D(FlexCylEXParameters *pars, double q, double phi);
51double flexcyl_ellipX_analytical_2DXY(FlexCylEXParameters *pars, double qx, double qy);
52
53#endif
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