Re: Plot failure: "Visible pixel grid has a scan line longer than previous scan lines"

[Hans-Bernhard B. <HBB...@t-...>]

Am 30.06.2020 um 20:49 schrieb Ethan A Merritt:
> 
> I have some reservations about whether it ever makes sense to clip
> the contents of a plot `with image`, since in the general case of
> rotation+translation, clipping will not leave a rectangle and thus the
> optimized image-data protocols that pass the image as a single chunk
> of data won't work.

OTOH, the alternative would be that the boundaries set up for clipping 
willl be disrespected completely.  That cannot really be considered correct.

> The current gnuplot code seems to assume that clipping will cleanly
> remove a constant width slice from each edge.  Perhaps one fix is to first
> detect that clipping exists, and if so fall back to 'with image pixels' so
> that each pixel is considered individually.

That does make more sense, IMHO.

> B) For any given axis (z in this case) the program should never try to
> apply both autoscaling and clipping!   

Not so fast.  It's still possible for one end of an axis to be clipped, 
while the other is autoscaled.