Description Retrieves the values for an importance sampling specification of type "Scatter rays into a given direction".
Syntax ImpSampGetDir n, indx, angle, x, y, z, entity
Parameters n As Long Node number of the surface.
indx As Long The index (zero based) of the importance sampling specification.
angle As Double Returned semi-angle (in degrees) of the solid angle cone for the importance sampling specification.
x As Double Returned x component of the direction vector.
y As Double Returned y component of the direction vector.
z As Double Returned z component of the direction vector.
entity As Long Returned identifier of the FRED entity whose coordinate system will define the direction vector. Other valid values are: -1 = Global coordinate system -2 = Self -3 = Local surface normal forward only (overrides the direction vector) -4 = Local surface normal forward and backward (overrides the direction vector)
Remarks This subroutine retrieves the values for an importance sampling specification of type "Scatter rays into a given direction". If the importance sampling specification is not a direction, or if there is another problem, the subroutine sets an error and returns without modifying the parameters.
See Also
Examples
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