shading with stitching functions
Hello, I'm still trying to get shading in MetaPost as the one in the attached eps file, but I don't manage to decipher the way how other shandings are done. There's a .tex file attached with a failed (hardcoded) example tries ... but I don't know where to explore further. I would appreciate any hints, Mojca
Mojca Miklavec wrote:
Hello,
I'm still trying to get shading in MetaPost as the one in the attached eps file, but I don't manage to decipher the way how other shandings are done.
There's a .tex file attached with a failed (hardcoded) example tries .... but I don't know where to explore further. well, 'where' coul dbe spec-tpd, or the pdftex manual -)
{\immediate\pdfobj stream attr {/FunctionType 0 /Order 1 /BitsPerSample 8 /Domain [\gMPs1 \gMPs2] /Decode [ 0 1 0 1 0 1 ] /Range [ 0 1 0 1 0 1 ] /Size [ 11 ]} {00 00 00 51 00 96 71 02 f3 8c 07 f3 a1 10 96 b4 20 00 c6 37 00 d5 57 00 e4 83 00 f2 ba 00 ff ff 00}% you can try to define a stream but then you also must maks sure that there is a corresponding length key Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
Hi Mojca, this is also on my wishlist (and christmas is over). Currently I use several color gradients in a row, to simulate the same effect. But sadly this way is too viewer dependent (rendering is a matter of luck with every new version), not to mention the big size. So if there would be a cleaner solution, I would be a happy man. I'm willing to help, but I haven't looked into specials yet. Give me some time for reading and some more time for understanding... ;) Greetings, Peter Mojca Miklavec wrote:
Hello,
I'm still trying to get shading in MetaPost as the one in the attached eps file, but I don't manage to decipher the way how other shandings are done.
There's a .tex file attached with a failed (hardcoded) example tries ... but I don't know where to explore further.
I would appreciate any hints, Mojca
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On 12/27/06, Peter Rolf wrote:
Hi Mojca,
this is also on my wishlist (and christmas is over). Currently I use several color gradients in a row, to simulate the same effect. But sadly this way is too viewer dependent (rendering is a matter of luck with every new version), not to mention the big size. So if there would be a cleaner solution, I would be a happy man.
I'm willing to help, but I haven't looked into specials yet. Give me some time for reading and some more time for understanding... ;)
With Hans's hint I finally got some kind of result. However, the numbers in the stream seem to influence the colors, but not in the way I want them to. I have to do some further explorations. Does anyone know how to convert PS to PDF without compression? Btw: TikZ supports such shadings, so if you don't necessary need a metapost graphic, you can take a look at it as well. Here's an example from the manual: \usemodule[tikz] \starttext \pgfdeclarehorizontalshading{myshadingA} {1cm}{rgb(0cm)=(1,0,0); color(2cm)=(green); color(4cm)=(blue)} \pgfuseshading{myshadingA} \stoptext (I've just found out that it uses another aproach for "sampled functions", perhaps I'll have more chances to figure out how to implement it that way.) Mojca
Mojca Miklavec wrote:
On 12/27/06, Peter Rolf wrote:
Hi Mojca,
this is also on my wishlist (and christmas is over). Currently I use several color gradients in a row, to simulate the same effect. But sadly this way is too viewer dependent (rendering is a matter of luck with every new version), not to mention the big size. So if there would be a cleaner solution, I would be a happy man.
I'm willing to help, but I haven't looked into specials yet. Give me some time for reading and some more time for understanding... ;)
With Hans's hint I finally got some kind of result. However, the numbers in the stream seem to influence the colors, but not in the way I want them to. I have to do some further explorations. Does anyone know how to convert PS to PDF without compression?
I used \pdfcompresslevel=0 with your example code.
Btw: TikZ supports such shadings, so if you don't necessary need a metapost graphic, you can take a look at it as well. Here's an example
from the manual:
I need them as mp graphic, but it shouldn't hurt to look into that.
\usemodule[tikz] \starttext \pgfdeclarehorizontalshading{myshadingA} {1cm}{rgb(0cm)=(1,0,0); color(2cm)=(green); color(4cm)=(blue)} \pgfuseshading{myshadingA} \stoptext
(I've just found out that it uses another aproach for "sampled functions", perhaps I'll have more chances to figure out how to implement it that way.)
Mojca _______________________________________________ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
participants (3)
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Hans Hagen -
Mojca Miklavec -
Peter Rolf