檢視 InF 的原始碼

=='''Format'''==
 InF // integer

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Flag for moving the starting point of light rays slightly behind the surface. If the flag is True, then the ray is emitted from <math>p-\epsilon \hat n</math> where <math>p</math> is some point on the surface, <math>\epsilon</math> is an infinitesimal, and <math>\hat n</math> is the normal vector of the surface.
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=='''Example'''==
 #InF
 SurfEmit
 Shell 1 
 1

The rays start slightly behind the surface.