Distant astronomical object (astroobject)#
Parameter |
Type |
Description |
Flags |
---|---|---|---|
irradiance |
spectrum |
Spectral irradiance, which corresponds to the amount of spectral power per unit area received by a hypothetical surface normal to the specified direction. |
P, ∂ |
to_world |
transform |
Emitter-to-world transformation matrix. |
P |
direction |
vector |
Alternative (and exclusive) to to_world. Direction in which the emitter is visible in world coordinates. |
|
angular_diameter |
float |
Angular diameter of the object in degrees. (Default: 0.5358) |
This emitter plugin implements an environment light source simulating a distant astronomical object. It radiates a specified power per unit area within a solid angle specified by the angular_diameter parameter. By default, the emitter radiates in the direction of the positive Z axis, i.e. \((0, 0, 1)\), with an angular diameter equal to the average apparent size of the Sun from Earth.