core_shell_microgelscostrafo411magnetic_modelrelease_v0.94release_v0.95ticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
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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 mass_dim, |
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5 | double surface_dim, |
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6 | double cluster_rg, |
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7 | double primary_rg); |
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8 | |
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9 | double Iqxy(double qx, double qy, |
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10 | double mass_dim, |
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11 | double surface_dim, |
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12 | double cluster_rg, |
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13 | double primary_rg); |
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14 | |
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15 | |
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16 | static double _mass_surface_fractal_kernel(double q, |
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17 | double mass_dim, |
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18 | double surface_dim, |
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19 | double cluster_rg, |
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20 | double primary_rg) |
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21 | { |
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22 | //computation |
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23 | double tot_dim = 6.0 - surface_dim - mass_dim; |
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24 | mass_dim /= 2.0; |
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25 | tot_dim /= 2.0; |
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26 | |
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27 | double rc_norm = cluster_rg * cluster_rg / (3.0 * mass_dim); |
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28 | double rp_norm = primary_rg * primary_rg / (3.0 * tot_dim); |
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29 | |
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30 | //x for P |
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31 | double x_val1 = 1.0 + q * q * rc_norm; |
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32 | double x_val2 = 1.0 + q * q * rp_norm; |
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33 | |
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34 | double inv_form = pow(x_val1, mass_dim) * pow(x_val2, tot_dim); |
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35 | |
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36 | //another singular |
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37 | if (inv_form == 0.0) return 0.0; |
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38 | |
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39 | double form_factor = 1.0; |
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40 | form_factor /= inv_form; |
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41 | |
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42 | return (form_factor); |
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43 | } |
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44 | double form_volume(double radius){ |
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45 | |
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46 | return 1.333333333333333*M_PI*radius*radius*radius; |
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47 | } |
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48 | |
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49 | double Iq(double q, |
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50 | double mass_dim, |
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51 | double surface_dim, |
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52 | double cluster_rg, |
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53 | double primary_rg) |
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54 | { |
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55 | return _mass_surface_fractal_kernel(q, |
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56 | mass_dim, |
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57 | surface_dim, |
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58 | cluster_rg, |
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59 | primary_rg); |
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60 | } |
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61 | |
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62 | // Iqxy is never called since no orientation or magnetic parameters. |
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63 | double Iqxy(double qx, double qy, |
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64 | double mass_dim, |
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65 | double surface_dim, |
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66 | double cluster_rg, |
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67 | double primary_rg) |
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68 | { |
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69 | double q = sqrt(qx*qx + qy*qy); |
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70 | return _mass_surface_fractal_kernel(q, |
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71 | mass_dim, |
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72 | surface_dim, |
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73 | cluster_rg, |
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74 | primary_rg); |
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75 | } |
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76 | |
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