Three small bugs with splot

[Philipp K. J. <ja...@ie...>]

1) The inline nohidden3d seems to have no effect

	set isosamples 30; set hidden3d
	splot exp(-(x**2+y**2)), 0.5 nohidden3d

The plane should be transparent; it isn't.


2) Line types in key off by one in contour plots with hidden3d

	set isosamples 30; set hidden3d
	set contour both
	splot [-2:2][-2:2] exp(-(x**2+y**2))

If you look closely, you realize that the colors of the
linesamples in the key are off by one, because the color
that's used for the underside of the surface is not taken
into account. If you do

	set hidden3d offset 0

then everything is fine (but the underside of the surface
is the same color as the top).


3) set ticscale vs set xyplane with save command

The "set ticscale" option is deprecated in favor of
"set xyplane". However, upon "save", gnuplot saves
only a "set ticscale" entry to the command file, not
a "set xyscale" entry. It works, but it is confusing.

Best,

		Ph.