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Last change
on this file since b82e536 was
f8644dd,
checked in by Kieran Campbell <kieranrcampbell@…>, 12 years ago
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Fixed calculation functions to pass unit tests
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-
Property mode set to
100644
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File size:
1.1 KB
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Rev | Line | |
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[fa6db8b] | 1 | |
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| 2 | /** |
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| 3 | This software was developed by Institut Laue-Langevin as part of |
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| 4 | Distributed Data Analysis of Neutron Scattering Experiments (DANSE). |
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| 5 | |
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| 6 | Copyright 2012 Institut Laue-Langevin |
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| 7 | |
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| 8 | **/ |
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| 9 | |
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| 10 | /** |
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| 11 | |
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| 12 | Scattering model class for the DAB (Debye Anderson Brumberger) Model |
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| 13 | |
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| 14 | **/ |
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| 15 | |
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| 16 | |
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| 17 | |
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| 18 | #include <math.h> |
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| 19 | #include "parameters.hh" |
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| 20 | #include "dabmodel.h" |
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| 21 | |
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| 22 | DABModel::DABModel() { |
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| 23 | length = Parameter(50.0); |
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| 24 | scale = Parameter(1.0); |
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| 25 | background = Parameter(0.0); |
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| 26 | |
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| 27 | } |
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| 28 | |
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| 29 | double DABModel::operator()(double q) { |
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| 30 | double d_length = length(); |
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| 31 | double d_scale = scale(); |
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| 32 | double d_background = background(); |
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| 33 | |
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| 34 | double numerator = d_scale*pow(d_length,3); |
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| 35 | double denominator = pow(1 + pow(q*d_length,2),2); |
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| 36 | |
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| 37 | return numerator / denominator + d_background; |
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| 38 | |
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| 39 | |
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| 40 | |
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| 41 | } |
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| 42 | |
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| 43 | double DABModel::operator()(double qx,double qy) { |
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| 44 | double q = sqrt(qx*qx + qy*qy); |
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| 45 | return this->operator()(q); |
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| 46 | } |
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| 47 | |
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| 48 | double DABModel::calculate_ER() { |
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[f8644dd] | 49 | // not implemented yet |
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[fa6db8b] | 50 | return 0.0; |
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| 51 | } |
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| 52 | |
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| 53 | double DABModel::calculate_VR() { |
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[f8644dd] | 54 | return 1.0; |
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[fa6db8b] | 55 | } |
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| 56 | |
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| 57 | double DABModel::evaluate_rphi(double q,double phi) { |
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[f8644dd] | 58 | double qx = q * cos(phi); |
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| 59 | double qy = q * sin(phi); |
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| 60 | return this->operator()(qx,qy); |
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[fa6db8b] | 61 | } |
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