class Shadowed_Facet_BRDF_Model
The class Shadowed_Facet_BRDF_Model
implements the facet scattering model with shadow
functions. Note: this class only implements the polarized
part of the scattering function; a Lambertian contribution
must be added to the scattering function to account for
multiply scattered light. The shadow function is supplied
using the abstract class Shadow_Function.
Parameters:
| Parameter | Data Type | Description | Default |
|---|---|---|---|
| lambda | double | Wavelength of the light
in vacuum [µm]. (Inherited from BRDF_Model.) |
0.532 |
| type | int | Indicates
whether scattering is evaluated in reflection (0) or
transmission (1). (Inherited from BRDF_Model.) |
0 |
| substrate | dielectric_function | The
optical constants of the substrate, expressed as a
complex number (n,k) or, optionally, as a function of
wavelength. (Inherited from BRDF_Model.) |
(4.05,0.05) |
| sdf | Slope_Distribution_Function | Function
describing the isotropic two-dimensional distribution
of surface slopes. (Inherited from Facet_BRDF_Model.) |
Exponential_Slope_Distribution_Function |
| stack | dielectric_stack | Description of any stack
of films deposited on the substrate, usually specified
by a file. The films are assumed to be conformal and of
total thickness much less than the horizontal scale of
the roughness. See dielectric_stack, for more information. (Inherited from Facet_BRDF_Model). |
no films |
| sdf | Shadow_Function | Function describing the shadowing and obscuration. | Torrance_Sparrow_Shadow_Function |
See also:
SCATMECH Home, Conventions, BRDF_Model, Facet_BRDF_Model, Shadow_Function
K.E.Torrance and E.M.Sparrow, "Theory of off-specular reflection from roughened surfaces," J. Opt. Soc. Am. 57(9), 1105-1114 (1967).
Include file:
#include "torrspar.h"
Source code:
torrspar.cpp
Definition of public elements:
class Shadowed_Facet_BRDF_Model : public Facet_BRDF_Model { };
For More Information
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Current SCATMECH version: 6.00 (February 2008)
This page first online: Version 2.00 (March 2001)
This page last modified: Version 6.00 (February 2008)