Re: z_floor and z_ceiling (was Re: various observations)

[<br...@ph...>]

Daniel J Sebald wrote:
> I put a bug report and patch on S.F. for this.  Try
> 
>  set xyplane at -20
>  splot x+y
> 
> before and after patch.

There's a bug there alright, but I don't think the patch is going in the 
right direction.  The real problem is the mismatch between the user 
interface presented by set.c:set_ticslevel() and the actual internal 
data structure t_xyplane.

> (I see HBB sort of nearby this stuff, with dates from way back.)

Not really to be wondered about.  I put such comments in the source 
wherever I see something dubious going on, or where the intent of a 
piece of code isn't immediately clear, and I initial them to make sure 
people know who to get back to about them.  I don't see any of those 
particularly close to the xyplane stuff, though, and none of them 
relating to it.