class Transmit_BRDF_Model
SCATMECH > List of Classes and Functions > Surface Scattering Models > class Transmit_BRDF_Model
Many of the other scattering models provide bidirectional transmittance distribution function (BTDF) calculations by setting the parameter mode to 1. However, they only calculate that quantity inside the material, not after further refraction out of the material. The model Transmit_BRDF_Model provides an interface that allows one to calculate the scatter by any of those models, but evaluated outside of the material, assuming that the material has parallel faces. The model takes another model as a parameter and requires that the optical properties of the substrate by non-absorbing.
Parameters:
| Parameter | Data Type | Description | Default |
|---|---|---|---|
| lambda | double | Wavelength of the light
in vacuum [µm]. (Inherited from BRDF_Model). Note: This parameter overrides the same parameter in model. |
0.532 |
| type | int | Indicates
whether scattering is evaluated in reflection (0) or
transmission (1). (Inherited from BRDF_Model). Note 1: This parameter overrides the same parameter in model. Note 2: This parameter must be set to 1. The default must be changed. |
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). Note 1: This parameter overrides the same parameter in model. Note 2: The material must be nonabsorbing. The default must be changed. |
(4.05,0.05) |
| model | BRDF_Model_Ptr | The
scattering model. |
Microroughness_BRDF_Model |
See also:
SCATMECH Home, Conventions, BRDF_Model
Include file:Source code:#include "transmit.h"
transmit.cpp
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Current SCATMECH version: 6.00 (February 2008)
This page first online: Version 5.00 (July 2005)
This page last modified: Version 6.00 (February 2008)