source: sasview/src/sas/models/c_extension/c_models/dabmodel.cpp @ 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: 1.1 KB
Line 
1
2/**
3        This software was developed by Institut Laue-Langevin as part of
4        Distributed Data Analysis of Neutron Scattering Experiments (DANSE).
5
6        Copyright 2012 Institut Laue-Langevin
7
8**/
9
10/**
11
12   Scattering model class for the DAB (Debye Anderson Brumberger) Model
13
14**/
15
16
17
18#include <math.h>
19#include "parameters.hh"
20#include "dabmodel.h"
21
22DABModel::DABModel() {
23  length = Parameter(50.0);
24  scale = Parameter(1.0);
25  background = Parameter(0.0);
26
27}
28
29double DABModel::operator()(double q) {
30  double d_length = length();
31  double d_scale = scale();
32  double d_background = background();
33
34  double numerator = d_scale*pow(d_length,3);
35  double denominator = pow(1 + pow(q*d_length,2),2);
36
37  return numerator / denominator + d_background;
38 
39
40
41}
42
43double DABModel::operator()(double qx,double qy) {
44  double q = sqrt(qx*qx + qy*qy);
45  return this->operator()(q);
46}
47
48double DABModel::calculate_ER() {
49  // not implemented yet
50  return 0.0;
51}
52
53double DABModel::calculate_VR() {
54  return 1.0;
55}
56
57double DABModel::evaluate_rphi(double q,double phi) {
58  double qx = q * cos(phi);
59  double qy = q * sin(phi);
60  return this->operator()(qx,qy);
61}
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