source: sasview/sansmodels/src/sans/models/c_extensions/elliptical_cylinder.h @ 8a6d4af

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Last change on this file since 8a6d4af was 7ad9887, checked in by Jae Cho <jhjcho@…>, 15 years ago

Added model descrp.s

  • Property mode set to 100644
File size: 2.2 KB
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[ae3ce4e]1#if !defined(ell_cylinder_h)
2#define ell_cylinder_h
3
[0f5bc9f]4/** Structure definition for cylinder parameters
[ae3ce4e]5 * [PYTHONCLASS] = EllipticalCylinderModel
[0f5bc9f]6 * [DISP_PARAMS] = r_minor, r_ratio, length, cyl_theta, cyl_phi, cyl_psi
[7ad9887]7 * [DESCRIPTION] = <text> Model parameters: r_minor = the radius of minor axis of the cross section
8r_ratio = the ratio of (r_major /r_minor >= 1)
9length = the length of the cylinder
10contrast = SLD of solvent - SLD of the cylinder
11background = incoherent background
12  *</text>
[836fe6e]13 * [FIXED]= <text> cyl_phi.width;
[7ad9887]14 * cyl_theta.width; cyl_psi.width; length.width; r_minor.width; r_ratio.width
[26e4a24]15 *</text>
[70faf5d]16 * [ORIENTATION_PARAMS]= cyl_phi; cyl_theta; cyl_psi;  cyl_phi.width; cyl_theta.width; cyl_psi.width
[ae3ce4e]17 * */
[25a608f5]18
19
[ae3ce4e]20typedef struct {
[0f5bc9f]21    /// Scale factor
[ae3ce4e]22    //  [DEFAULT]=scale=1.0
23    double scale;
[1ed3834]24    /// Minor radius [A]
25    //  [DEFAULT]=r_minor=20.0 [A]
[ae3ce4e]26    double r_minor;
27    /// Ratio of major/minor radii
[70faf5d]28    //  [DEFAULT]=r_ratio=1.5
[ae3ce4e]29    double r_ratio;
[1ed3834]30    /// Length of the cylinder [A]
31    //  [DEFAULT]=length=400.0 [A]
[ae3ce4e]32    double length;
[1ed3834]33    /// Contrast [1/A²]
34    //  [DEFAULT]=contrast=3.0e-6 [1/A²]
[ae3ce4e]35    double contrast;
[70faf5d]36        /// Incoherent Background [1/cm] 0.000
37        //  [DEFAULT]=background=0 [1/cm]
[0f5bc9f]38        double background;
[ae3ce4e]39    /// Orientation of the cylinder axis w/respect incoming beam [rad]
[70faf5d]40    //  [DEFAULT]=cyl_theta=1.57 [rad]
[ae3ce4e]41    double cyl_theta;
42    /// Orientation of the cylinder in the plane of the detector [rad]
[70faf5d]43    //  [DEFAULT]=cyl_phi=0.0 [rad]
[0f5bc9f]44    double cyl_phi;
[ae3ce4e]45    /// Orientation of major radius of the cross-section w/respect vector q [rad]
[70faf5d]46    //  [DEFAULT]=cyl_psi=0.0 [rad]
[0f5bc9f]47    double cyl_psi;
[ae3ce4e]48} EllipticalCylinderParameters;
49
50
51
52/// 1D scattering function
53double elliptical_cylinder_analytical_1D(EllipticalCylinderParameters *pars, double q);
54
55/// 2D scattering function
56double elliptical_cylinder_analytical_2D(EllipticalCylinderParameters *pars, double q, double phi);
57double elliptical_cylinder_analytical_2DXY(EllipticalCylinderParameters *pars, double qx, double qy);
58double elliptical_cylinder_analytical_2D_scaled(EllipticalCylinderParameters *pars, double q, double q_x, double q_y);
59
60#endif
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