1 | #if !defined(ell_cylinder_h) |
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2 | #define ell_cylinder_h |
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3 | |
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4 | /** Structure definition for cylinder parameters |
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5 | * [PYTHONCLASS] = EllipticalCylinderModel |
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6 | * [DISP_PARAMS] = r_minor, r_ratio, length, cyl_theta, cyl_phi, cyl_psi |
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7 | * [DESCRIPTION] = <text> Model parameters: r_minor = the radius of minor axis of the cross section |
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8 | r_ratio = the ratio of (r_major /r_minor >= 1) |
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9 | length = the length of the cylinder |
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10 | contrast = SLD of solvent - SLD of the cylinder |
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11 | background = incoherent background |
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12 | *</text> |
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13 | * [FIXED]= <text> cyl_phi.width; |
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14 | * cyl_theta.width; cyl_psi.width; length.width; r_minor.width; r_ratio.width |
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15 | *</text> |
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16 | * [ORIENTATION_PARAMS]= cyl_phi; cyl_theta; cyl_psi; cyl_phi.width; cyl_theta.width; cyl_psi.width |
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17 | * */ |
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18 | |
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19 | |
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20 | typedef struct { |
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21 | /// Scale factor |
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22 | // [DEFAULT]=scale=1.0 |
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23 | double scale; |
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24 | /// Minor radius [A] |
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25 | // [DEFAULT]=r_minor=20.0 [A] |
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26 | double r_minor; |
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27 | /// Ratio of major/minor radii |
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28 | // [DEFAULT]=r_ratio=1.5 |
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29 | double r_ratio; |
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30 | /// Length of the cylinder [A] |
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31 | // [DEFAULT]=length=400.0 [A] |
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32 | double length; |
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33 | /// Contrast [1/A²] |
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34 | // [DEFAULT]=contrast=3.0e-6 [1/A²] |
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35 | double contrast; |
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36 | /// Incoherent Background [1/cm] 0.000 |
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37 | // [DEFAULT]=background=0 [1/cm] |
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38 | double background; |
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39 | /// Orientation of the cylinder axis w/respect incoming beam [rad] |
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40 | // [DEFAULT]=cyl_theta=1.57 [rad] |
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41 | double cyl_theta; |
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42 | /// Orientation of the cylinder in the plane of the detector [rad] |
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43 | // [DEFAULT]=cyl_phi=0.0 [rad] |
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44 | double cyl_phi; |
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45 | /// Orientation of major radius of the cross-section w/respect vector q [rad] |
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46 | // [DEFAULT]=cyl_psi=0.0 [rad] |
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47 | double cyl_psi; |
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48 | } EllipticalCylinderParameters; |
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49 | |
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50 | |
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51 | |
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52 | /// 1D scattering function |
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53 | double elliptical_cylinder_analytical_1D(EllipticalCylinderParameters *pars, double q); |
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54 | |
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55 | /// 2D scattering function |
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56 | double elliptical_cylinder_analytical_2D(EllipticalCylinderParameters *pars, double q, double phi); |
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57 | double elliptical_cylinder_analytical_2DXY(EllipticalCylinderParameters *pars, double qx, double qy); |
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58 | double elliptical_cylinder_analytical_2D_scaled(EllipticalCylinderParameters *pars, double q, double q_x, double q_y); |
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59 | |
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60 | #endif |
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