#if !defined(hollow_cylinder_h) #define hollow_cylinder_h /** * Structure definition for hollow cylinder parameters */ //[PYTHONCLASS] = HollowCylinderModel //[DISP_PARAMS] = core_radius, radius, length, axis_theta, axis_phi //[DESCRIPTION] = P(q) = scale*/Vol + bkg, where f is the scattering amplitude. // core_radius = the radius of core // radius = the radius of shell // length = the total length of the cylinder // contrast = SLD of solvent - SLD of shell // background = incoherent background // //[FIXED]= axis_phi.width; axis_theta.width; length.width;core_radius.width; radius //[ORIENTATION_PARAMS]= axis_phi; axis_theta;axis_phi.width; axis_theta.width typedef struct { /// Scale factor // [DEFAULT]=scale=1.0 double scale; /// Core radius [A] // [DEFAULT]=core_radius=20.0 [A] double core_radius; /// Shell radius [A] // [DEFAULT]=radius=30.0 [A] double radius; /// Hollow cylinder length [A] // [DEFAULT]=length=400.0 [A] double length; /// Contrast [1/AČ] // [DEFAULT]=contrast=5.3e-6 [1/AČ] double contrast; /// Incoherent Background [1/cm] // [DEFAULT]=background=0.01 [1/cm] double background; /// Orientation of the long axis of the hollow cylinder w/respect incoming beam [rad] // [DEFAULT]=axis_theta=1.57 [rad] double axis_theta; /// Orientation of the long axis of the hollow cylinder in the plane of the detector [rad] // [DEFAULT]=axis_phi=0.0 [rad] double axis_phi; } HollowCylinderParameters; /// 1D scattering function double hollow_cylinder_analytical_1D(HollowCylinderParameters *pars, double q); /// 2D scattering function double hollow_cylinder_analytical_2D(HollowCylinderParameters *pars, double q, double phi); double hollow_cylinder_analytical_2DXY(HollowCylinderParameters *pars, double qx, double qy); double hollow_cylinder_analytical_2D_scaled(HollowCylinderParameters *pars, double q, double q_x, double q_y); #endif