On 10/11/2021 6:30 AM, Gavin via ntg-context wrote:
Hi List,
I made good progress producing fainter pictures in metafun. Here is a uniformly
accelerated cow in the style of my book.
I abandoned transparency, since I actually don’t want to see through anything.
I am using uncolored to get the fade. It works great with a picture that is
made with fill and draw, but it doesn’t work with shading. The example below
has a flat disk and a round ball. The disk looks fine, but the shaded ball is
not surviving the application of inverted / uncolored.
\startMPinclusions
picture disk, ball;
disk := image(
fill fullcircle scaled 1cm withcolor .4white;
draw fullcircle scaled 1cm withpen pencircle scaled 0.8pt ;);
ball := image(
fill fullcircle scaled 1cm
withshademethod "circular"
withshadecenter (.25,.25)
withshadecolors (.8white, black);
draw fullcircle scaled 1cm withpen pencircle scaled 0.8pt ;);
\stopMPinclusions
\startMPpage
draw inverted (disk uncolored .1white) ;
draw inverted (disk uncolored .2white) shifted (0.25cm,0) ;
draw inverted (disk uncolored .5white) shifted (1cm,0) ;
draw disk shifted (2.25cm,0) ;
draw inverted (ball uncolored .1white) shifted (0, -2cm) ;
draw inverted (ball uncolored .2white) shifted (0.25cm, -2cm) ;
draw inverted (ball uncolored .5white) shifted (1cm, -2cm) ;
draw ball shifted (2.25cm, -2cm) ;
\stopMPpage
Same result in LMTX and MkIV. (ConTeXt ver: 2021.09.17 10:01 LMTX fmt:
2021.9.21 int: english/english)
I’m pretty happy with this uncolored trick, and will be even happier if I can
get it to work with the shadings.
Any suggestions?
\startMPpage
fill fullcircle scaled 10cm
shifted (3cm,0)
withcolor white ;
fill fullcircle scaled 10cm
shifted (3cm,0)
withcolor black
withtransparency (1,.25) ;
fill fullcircle scaled 5cm
shifted (3cm,0)
withcolor .25[red,white] ;
\stopMPpage
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Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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