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

[Ethan A M. <merritt@u.washington.edu>]

On Saturday 20 May 2006 01:57 pm, Daniel J Sebald wrote:
> Ethan A Merritt wrote:
> > I never did understand 'set ticslevel', but whatever it did should
> > stay that way for backwards compatibility.
> > 
> > The idea behind 'set xyplane <foo>' is [supposed to be] obvious:
> > Whatever zrange is, whatever way round the axes are pointing,
> > yadda yadda,   draw the plane so that it intersects the z axis
> > at <foo>.
> 
> 'set xyplane *at* <foo>' does as you explain, and that works just as advertised.  
> 
> The problem is the "percentage of z-axis" form, i.e., 
> the non "at" form, the form for which the actual values on the z-axis do not matter;
> rather the user wants the xyplane to be somewhere relative to the z-axis visually.  

Then let's just get rid of the "no at" form for 'set xyplane'.
I don't see a need for it.

With Petr's patch to export GPVAL_Z_MIN and GPVAL_Z_MAX,
you can accomplish the same thing by saying
	set xyplane at func(GPVAL_Z_MIN,GPVAL_Z_MAX)

-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742