Re: Performer intersection problem (maybe?)

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Jim Helman (jimh++at++surreal)
Fri, 05 May 95 14:18:50 -0700

> 1) I was running with pfNotifyLevel(PFNFY_FATAL) but performer never
> complained. Is this because it will only output messages if Performer
> generates NANs, but will do nothing if it starts with bad info in the
> first place.

PFNFY_FATAL tells Performer to only complain if it is about to die.
NaN's are not usually fatal. If you want debugging info and FP
exception details, you should set PFNFY_FP_DEBUG.

> 2) When it happened, it seemed to "infect" all intersection tests --
> even ones not related to the above problem -- so that they also
> started to return bogus (i.e., NANs) results when fed proper
> numbers. Is this behaviour to be expected?

I'm not sure how this could happen since nothing inside the toolkit
should be reusing any data from a previous traversal.

rgds,

-jim helman

jimh++at++surreal.asd.sgi.com
415/390-1151

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