... fixed minor typo that actually produced new information! invalid color =>
black, valid color => transparent black!---it seems like the color disappears
in the transfer but not the transparency.
Hey---
There seems to be a change with color transfer from ConTeXt to MetaPost. Using
string references to defined (spot?) colors seemed to work but now does not;
all of my colorful figures are now rendered only in shades of gray when using
defined (spot?) colors….
The figure drawn by the MWE should have a dark orange border and a transparent
(thin) orange fill. However, all colors of this sort seem to end up being a
single shade of gray (e.g. black), rendering a box perfect for Halloween use
but not for my current purposes. Is there a change to how colors defined in
ConTeXt are referenced in MetaPost that I've missed or is there an issue with
transferring color (name or parameter) information to MetaPost? Defined (spot?)
colors work fine in ConTeXt but not in MetaPost.
Many thanks,
---K
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% system > ConTeXt ver: 2021.07.21 19:54 LMTX fmt: 2021.7.22 int:
english/english
\startMPdefinitions
presetparameters "parameters_Test"
[
]
def Test =
applyparameters "parameters_Test" "do_Test"
enddef;
def do_Test =
pushparameters "parameters_Test";
string p; p = getparameter "prefix"; show p;
string c; c = getparameter "color"; show c;
path s; s = unitsquare scaled 10cm; show s;
path t; t = unitsquare scaled 5cm; show t; % new
fill s withcolor p&":"&c; % tweaked
fill t withcolor p &c; % new (and
old)
draw s withpen pencircle scaled 5pt withcolor c;
enddef;
\stopMPdefinitions
\starttext
\definespotcolor[Thin:orange][orange][p=1,a=normal,t=0.5]
\color[orange]{hello}
\startalignment[center]
\startplacefigure
\startMPcode
Test [ prefix = "Thin", color = "orange" ];
\stopMPcode
\stopplacefigure
\stopalignment
\color[Thin:orange]{goodbye}
\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Kevin W. Rudd, Ph.D.
CAPT, USN (Ret)
Computer Architecture & Computer Engineering
Advanced Computing Systems (ACS) Research Program
Laboratory for Physical Sciences (LPS)
443-654-7878
ke...@lps.umd.edu<mailto:ke...@lps.umd.edu>
Visiting Research Professor
United States Naval Academy
r...@usna.edu<mailto:r...@usna.edu>
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