Re: Gnuplot crashing for "hidden3d undefined" ?

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Philipp K. Janert wrote:
> The following two commands will crash 
> gnuplot:
> 	set hidden3d undefined 2
> 	splot [][][:1] 10*exp(-(x**2 + y**2))
> Gnuplot dies with the following message:
> 	hidden3d.c:776: store_polygon: Assertion `p->ymax <= surface_scale' failed.

Strangely enough, there's no such problem with the Win32 release version...

> Note that the plot command is such that
> there are values of the function outside
> the plot range (z-range).

Actually, no, there aren't.  Not at the default setting of

	set isosamples 10

anyway.  That's one too few. ;->

The problem itself is an internal constraint violation in the hidden3d 
algorithm.  Something broke the code designed to ensure that 
out-of-range data points don't make it to that point of the algorithm.