Re: Contour lines not continuous

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

On Thursday 18 December 2003 11:12, Ethan Merritt wrote:
>
> The attached quick patch seems to work, but I have not
> tested it on anything other than contours.dem

Oops. One more minor tweak is needed.
The following corrected patch correctly processes the example script
provided on the newsgroup.   In particular, the contour lines near the
plot origin are rendered in dash-dot modes as listed in the figure key.

HOWEVER - it does indeed reveal a problem, or at least a difference,
with the arrow style code as per the comment in post.trm.
Quick test:
=09set term post color dash
=09set output 'bug.ps'
=09load 'arrowstyle.dem'

You will see that the current 3.8k produces solid arrows everywhere,
whereas the patched version produces dotted arrows.

Then again, if you specifically ask for 'set term post dash', is this rea=
lly an error?


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# This demo script triggers a bug in 3.8j such that contour lines
# do not get rendered with correct dash/dot values
set terminal postscript landscape enhanced color dashed
set pm3d at st
set border 4095
set surface
set samples 25
set isosamples 20
set ticslevel 0
set contour base
set cntrparam bspline
set view 0,0
set nosurface
set key screen 0.15,0.7 title "Contour" Right nobox
set title "surface and pm3d (surface and top) of radial sinc function"
splot [-15:15.01] [-15:15.01] [-0.2:1] \
  sin(sqrt(x**2+y**2)) / sqrt(x**2+y**2)=20


--=20
Ethan A Merritt       merritt@u.washington.edu
Biomolecular Structure Center Box 357742
University of Washington, Seattle, WA 98195