wrote:

> HFComputeNormal and HFSphereRcrse from shapes.inc seem not described.
> 
> 7.8.1 & 7.8.2 give information via name of variables
> 7.8.4 & 7.8.5 give little text information
> but 7.8.3 has no information at all
> 

I'll look int this,

Thank,

Ingo

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