source: sasview/src/sas/models/include/fractal.h @ 79492222

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Last change on this file since 79492222 was 79492222, checked in by krzywon, 8 years ago

Changed the file and folder names to remove all SANS references.

  • Property mode set to 100644
File size: 1.7 KB
Line 
1#if !defined(fractal_h)
2#define fractal_h
3#include "parameters.hh"
4
5/**
6 * Structure definition for sphere parameters
7 */
8//[PYTHONCLASS] = FractalModel
9//[DISP_PARAMS] = radius
10//[DESCRIPTION] =<text> The scattering intensity  I(x) = P(|x|)*S(|x|) + background, where
11//       p(x)= scale * V * delta^(2)* F(x*radius)^(2)
12//       F(x) = 3*[sin(x)-x cos(x)]/x**3
13//       where delta = sldBlock -sldSolv.
14//       scale        =  scale factor * Volume fraction
15//       radius       =  Block radius
16//       fractal_dim  =  Fractal dimension
17//       cor_length  =  Correlation Length
18//       sldBlock    =  SDL block
19//       sldSolv  =  SDL solvent
20//       background   =  background
21//              </text>
22//[FIXED]= <text> radius.width </text>
23//[ORIENTATION_PARAMS]= <text> </text>
24
25class FractalModel{
26public:
27  // Model parameters
28  /// Radius of gyration [A]
29  //  [DEFAULT]=radius=5.0 [A]
30  Parameter radius;
31
32  /// Scale factor
33  //  [DEFAULT]=scale= 0.05
34  Parameter scale;
35
36  /// Fractal dimension
37  //  [DEFAULT]=fractal_dim=2.0
38  Parameter fractal_dim;
39
40  /// Correlation Length [A]
41  //  [DEFAULT]=cor_length=100.0 [A]
42  Parameter cor_length;
43
44  /// SDL block [1/A^(2)]
45  //  [DEFAULT]=sldBlock=2.0e-6 [1/A^(2)]
46  Parameter sldBlock;
47
48  /// SDL solvent [1/A^(2)]
49  //  [DEFAULT]=sldSolv= 6.35e-6 [1/A^(2)]
50  Parameter sldSolv;
51
52  /// Incoherent Background [1/cm]
53  //  [DEFAULT]=background=0.0 [1/cm]
54  Parameter background;
55
56  // Constructor
57  FractalModel();
58
59  // Operators to get I(Q)
60  double operator()(double q);
61  double operator()(double qx, double qy);
62  double calculate_ER();
63  double calculate_VR();
64  double evaluate_rphi(double q, double phi);
65};
66
67#endif
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