[Plplot-devel] Need help with nasty cmap bugs in plframe.c

[Alan W. I. <ir...@be...>]

Grab bag of topics here.  The 3rd one is the nasty bug.

(1) Maurice brought up turning on dynamic drivers by default earlier.  Since
nobody has objected, and I think this will be of some benefit to our users,
I have just committed the change.

(2) I have also done some preliminary runs of plplot-test.sh, and all the
many changes today seem to be working well together.

(3) I also did a preliminary test of tkdemos.tcl, and found some bad
problems with the colour map handling.

To generate the problem simply do the following:

./plserver
% source tkdemos.tcl
8

the

$w cmd  plscmap1 rr gg bb $n_col

command in x08.tcl (where n_col is been set to 256) is completely
incompatible with plframe although this command works fine for tcldemos.tcl

(1) plframe.c assumes the incorrect order of arguments.

(2) Once the arguments are rearranged, then the limit on n_col must be
raised to at least 256.

(3) After those changes it still doesn't work.  I don't really understand
the scol1 programme logic, but to me it looks unsuitable for what is
meant by plscmap1 which should just set the colours in cmap1 without
worrying about interpolation.  Anyhow, I am beyond my depth, and I have
backed out without committing anything.

Maurice, could you have a look at this?

The reason why this was never noticed in 5.0.4 is the x08.tcl example there
had no 3D shaded plot.  All my testing of the x08.tcl, etc. changes has been
under tcldemos.tcl which has absolutely no problems.  I didn't really twig
to the fact that some of the API calls were intercepted by plframe.c
until tonight so I never worried about a tkdemos.tcl test.

BTW, all the other tckdemos.tcl tests go through fine except for example 8.

Alan

email: ir...@be...
phone: 250-727-2902	FAX: 250-721-7715
snail-mail:
Dr. Alan W. Irwin
Department of Physics and Astronomy,
University of Victoria, P.O. Box 3055,
Victoria, British Columbia, Canada, V8W 3P6
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