7.25. Ray Trace Source

7.25.1. Raytrace Source

Scope: Aria Region
Summary: Specification of ray source to be used as part of a ray tracing boundary condition

begin Raytrace Source Value

   Absorption Expression [For Band Band] {=} Value

   Absorption Model {=} {fresnel | specular}

   Banded Wavelength Model {=} Value

   Direction Function {=} Value

   Discretization {=} {monte_carlo | radial}

   Exponential Factor {=} Value

   Flux Function [For Band Band] {=} Value

   Maximum Intersections {=} Value

   Minimum Power Ratio {=} Value

   Number Of Circular Segments {=} Value

   Number Of Radial Segments {=} Value

   Number Of Rays {=} Value

   Parallel Type {=} {ray | scene}

   Path Function {=} Value

   Power Function [For Band Band] {=} Value

   Radius {=} Value

   Type {=} {circular | circular_gaussian}

end Raytrace Source Value

7.25.1.1. Line Commands

Absorption Expression

Syntax: Absorption Expression [For Band Band] {=} Value
Summary: Specify the expression to use to calculate the surface absorption properties

Parameter	Value	Default
Band	string	–
{=}	{= \| are \| is}	–
Value	string	–

Absorption Model

Syntax: Absorption Model {=} {fresnel | specular}
Summary: Set the method for calculating ray interactions with surfaces. Valid values are ‘Specular’ and ‘Fresnel’

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{fresnel \| specular}	–

Banded Wavelength Model

Syntax: Banded Wavelength Model {=} Value
Summary: Specify a banded wavelength model to use for banded radiation

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–

Direction Function

Syntax: Direction Function {=} Value
Summary: Specify the user function giving the 3 components of the travel direction for the rays as a function of time

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–

Discretization

Syntax: Discretization {=} {monte_carlo | radial}
Summary: Set the method for discretizing the source into rays. Valid values are ‘Monte Carlo’ and ‘Radial’

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{monte_carlo \| radial}	–

Exponential Factor

Syntax: Exponential Factor {=} Value
Summary: Set the exponential factor. Required for the Circular_Gaussian type

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real	–

Flux Function

Syntax: Flux Function [For Band Band] {=} Value
Summary: Specify the user function giving the flux of the circular sources as a function of time

Parameter	Value	Default
Band	string	–
{=}	{= \| are \| is}	–
Value	string	–

Maximum Intersections

Syntax: Maximum Intersections {=} Value
Summary: Set the number of times that a ray may intersect surfaces before it is no longer tracked. Default is 10

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	–

Minimum Power Ratio

Syntax: Minimum Power Ratio {=} Value
Summary: Set the minimum fraction of initial power that a ray may have before it is no longer tracked. Default is 0.001

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real	–

Number Of Circular Segments

Syntax: Number Of Circular Segments {=} Value
Summary: Set the number of segments to discretize the circle circumference into at the innermost radial segment. Required for the radial discretization type

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	–

Number Of Radial Segments

Syntax: Number Of Radial Segments {=} Value
Summary: Set the number of segments to discretize the circle radius into. Required for the radial discretization type

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	–

Number Of Rays

Syntax: Number Of Rays {=} Value
Summary: Set the number of rays to be generated by the circular sources. Required for the Monte Carlo discretization type

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	–

Parallel Type

Syntax: Parallel Type {=} {ray | scene}
Summary: Set the parallel decomposition method for the ray tracer. Valid values are ‘Ray’ and ‘Scene’

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{ray \| scene}	–

Path Function

Syntax: Path Function {=} Value
Summary: Specify the user function giving the x, y, and z position of the circular sources as a function of time

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–

Power Function

Syntax: Power Function [For Band Band] {=} Value
Summary: Specify the user function giving the power of the circular sources as a function of time

Parameter	Value	Default
Band	string	–
{=}	{= \| are \| is}	–
Value	string	–

Radius

Syntax: Radius {=} Value
Summary: Set the radius for the circular shapes

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real	–

Type

Syntax: Type {=} {circular | circular_gaussian}
Summary: Set the type of the ray source. Valid values are ‘Circular’ and ‘Circular_Gaussian’

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{circular \| circular_gaussian}	–