Contour lines not continuous

[Hans-Bernhard B. <br...@ph...>]

Hello, 

some of you may have seen it over in the user list/newsgroup, but I think
this should be addressed here, too:

A user just found a problem with gnuplot-3.8 that has been sitting in
there for quite some time now:  contour lines are now drawn as individual
line segments, where 3.7 managed to long polylines (sometimes *too* long,
leading to its own kind of problems).  That's bad if the line type used is
patterned, because individual segments re-start the pattern each time,
rendering the pattern indecipherable.

The key difference is in graph3d.c:cntr3d_lines() and friends: in 3.7,
they used clip_move() and clip_vector() to create (optionally
clipped/broken) polylines.  In 3.8, we use draw3d_line directly, which
does both a term->move() and term->vector(), usually.

AFAICS, it was me who did that, as part of the big set of modifications
done on the "axis branch".

I guess this will have to be fixed, too, before a 4.0 becomes ready.
Looks like I just found something to do for the holy days.

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.