core_shell_microgelscostrafo411magnetic_modelrelease_v0.94release_v0.95ticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
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[30b4ddf] | 1 | double form_volume(void); |
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| 2 | |
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| 3 | double Iq(double q, |
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| 4 | double guinier_scale, |
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| 5 | double lorentzian_scale, |
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| 6 | double gyration_radius, |
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| 7 | double fractal_exp, |
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| 8 | double cor_length); |
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| 9 | |
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| 10 | double Iqxy(double qx, double qy, |
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| 11 | double guinier_scale, |
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| 12 | double lorentzian_scale, |
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| 13 | double gyration_radius, |
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| 14 | double fractal_exp, |
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| 15 | double cor_length); |
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| 16 | |
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| 17 | static double _gel_fit_kernel(double q, |
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| 18 | double guinier_scale, |
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| 19 | double lorentzian_scale, |
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| 20 | double gyration_radius, |
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| 21 | double fractal_exp, |
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| 22 | double cor_length) |
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| 23 | { |
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| 24 | // Lorentzian Term |
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| 25 | ////////////////////////double a(x[i]*x[i]*zeta*zeta); |
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| 26 | double lorentzian_term = q*q*cor_length*cor_length; |
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| 27 | lorentzian_term = 1.0 + ((fractal_exp + 1.0)/3.0)*lorentzian_term; |
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| 28 | lorentzian_term = pow(lorentzian_term, (fractal_exp/2.0) ); |
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| 29 | |
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| 30 | // Exponential Term |
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| 31 | ////////////////////////double d(x[i]*x[i]*rg*rg); |
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| 32 | double exp_term = q*q*gyration_radius*gyration_radius; |
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| 33 | exp_term = exp(-1.0*(exp_term/3.0)); |
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| 34 | |
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| 35 | // Scattering Law |
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| 36 | double result = lorentzian_scale/lorentzian_term + guinier_scale*exp_term; |
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| 37 | return result; |
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| 38 | } |
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| 39 | double form_volume(void){ |
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| 40 | // Unused, so free to return garbage. |
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| 41 | return NAN; |
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| 42 | } |
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| 43 | |
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| 44 | double Iq(double q, |
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| 45 | double guinier_scale, |
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| 46 | double lorentzian_scale, |
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| 47 | double gyration_radius, |
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| 48 | double fractal_exp, |
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| 49 | double cor_length) |
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| 50 | { |
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| 51 | return _gel_fit_kernel(q, |
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| 52 | guinier_scale, |
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| 53 | lorentzian_scale, |
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| 54 | gyration_radius, |
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| 55 | fractal_exp, |
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| 56 | cor_length); |
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| 57 | } |
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| 58 | |
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| 59 | // Iqxy is never called since no orientation or magnetic parameters. |
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| 60 | double Iqxy(double qx, double qy, |
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| 61 | double guinier_scale, |
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| 62 | double lorentzian_scale, |
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| 63 | double gyration_radius, |
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| 64 | double fractal_exp, |
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| 65 | double cor_length) |
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| 66 | { |
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| 67 | double q = sqrt(qx*qx + qy*qy); |
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| 68 | return _gel_fit_kernel(q, |
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| 69 | guinier_scale, |
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| 70 | lorentzian_scale, |
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| 71 | gyration_radius, |
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| 72 | fractal_exp, |
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| 73 | cor_length); |
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| 74 | } |
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| 75 | |
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