core_shell_microgelscostrafo411magnetic_modelrelease_v0.94release_v0.95ticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
Last change
on this file since 9da407c was
6794301,
checked in by wojciech, 8 years ago
|
NR gamma function replaced
|
-
Property mode set to
100644
|
File size:
1.5 KB
|
Rev | Line | |
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[5c1d341] | 1 | double form_volume(double radius); |
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| 2 | |
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| 3 | double Iq(double q, |
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| 4 | double radius, |
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| 5 | double mass_dim, |
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| 6 | double cutoff_length); |
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| 7 | |
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| 8 | double Iqxy(double qx, double qy, |
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| 9 | double radius, |
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| 10 | double mass_dim, |
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| 11 | double cutoff_length); |
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| 12 | |
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| 13 | |
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| 14 | static double _mass_fractal_kernel(double q, |
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| 15 | double radius, |
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| 16 | double mass_dim, |
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| 17 | double cutoff_length) |
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| 18 | { |
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[61fd21d] | 19 | // Actively check the argument. |
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| 20 | if (mass_dim <= 1.0){ |
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| 21 | return 0.0; |
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| 22 | } |
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| 23 | |
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[9c461c7] | 24 | //calculate P(q) |
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| 25 | double pq = sph_j1c(q*radius); |
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| 26 | pq = pq*pq; |
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[5c1d341] | 27 | |
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| 28 | //calculate S(q) |
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| 29 | double mmo = mass_dim-1.0; |
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[6794301] | 30 | double sq = sas_gamma(mmo)*sin((mmo)*atan(q*cutoff_length)); |
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[5c1d341] | 31 | sq *= pow(cutoff_length, mmo); |
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| 32 | sq /= pow((1.0 + (q*cutoff_length)*(q*cutoff_length)),(mmo/2.0)); |
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| 33 | sq /= q; |
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| 34 | |
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| 35 | //combine and return |
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| 36 | double result = pq * sq; |
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| 37 | |
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| 38 | return result; |
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| 39 | } |
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| 40 | double form_volume(double radius){ |
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| 41 | |
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| 42 | return 1.333333333333333*M_PI*radius*radius*radius; |
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| 43 | } |
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| 44 | |
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| 45 | double Iq(double q, |
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| 46 | double radius, |
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| 47 | double mass_dim, |
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| 48 | double cutoff_length) |
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| 49 | { |
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| 50 | return _mass_fractal_kernel(q, |
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| 51 | radius, |
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| 52 | mass_dim, |
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| 53 | cutoff_length); |
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| 54 | } |
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| 55 | |
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| 56 | // Iqxy is never called since no orientation or magnetic parameters. |
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| 57 | double Iqxy(double qx, double qy, |
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| 58 | double radius, |
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| 59 | double mass_dim, |
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| 60 | double cutoff_length) |
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| 61 | { |
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| 62 | double q = sqrt(qx*qx + qy*qy); |
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| 63 | return _mass_fractal_kernel(q, |
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| 64 | radius, |
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| 65 | mass_dim, |
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| 66 | cutoff_length); |
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| 67 | } |
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| 68 | |
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