core_shell_microgelsmagnetic_modelticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
Last change
on this file since 5bc6d21 was
c3ccaec,
checked in by GitHub <noreply@…>, 7 years ago
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Merge branch 'master' into ticket-815
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-
Property mode set to
100644
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File size:
881 bytes
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1 | |
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2 | static double |
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3 | f_constant(double q, double r, double sld) |
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4 | { |
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5 | const double bes = sas_3j1x_x(q * r); |
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6 | const double vol = M_4PI_3 * cube(r); |
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7 | return sld * vol * bes; |
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8 | } |
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9 | |
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10 | static double |
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11 | form_volume(double core_radius, double fp_n, double thickness[]) |
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12 | { |
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13 | double r = core_radius; |
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14 | int n = (int)(fp_n+0.5); |
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15 | for (int i=0; i < n; i++) { |
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16 | r += thickness[i]; |
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17 | } |
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18 | return M_4PI_3 * cube(r); |
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19 | } |
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20 | |
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21 | static double |
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22 | Iq(double q, double core_sld, double core_radius, |
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23 | double solvent_sld, double fp_n, double sld[], double thickness[]) |
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24 | { |
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25 | const int n = (int)(fp_n+0.5); |
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26 | double f, r, last_sld; |
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27 | r = core_radius; |
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28 | last_sld = core_sld; |
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29 | f = 0.; |
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30 | for (int i=0; i<n; i++) { |
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31 | f += M_4PI_3 * cube(r) * (sld[i] - last_sld) * sas_3j1x_x(q*r); |
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32 | last_sld = sld[i]; |
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33 | r += thickness[i]; |
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34 | } |
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35 | f += M_4PI_3 * cube(r) * (solvent_sld - last_sld) * sas_3j1x_x(q*r); |
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36 | return f * f * 1.0e-4; |
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37 | } |
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