Next: image, Previous: rect, Up: Position Generators [Contents][Index]
A circular disk with the given angular radius. name is a
string used for identification purposes. optargs is a lua
table containing optional parameters.
The position of the source is given by these parameters:
theta
The distance from the optical axis to the center of the rectangle, in radians. If not specified, it defaults to ‘0’.
phi
The azimuth about the optical axis, in radians. If not specified, it defaults to ‘0’.
z
The Z coordinate of the source. This defaults to an infinitely distant source.
For instructions on specifying the source distribution, Intensity Distributions.