Re: [NTG-context] Shading

Hi Wolfgang, I would like the same result as the code with TikZ. Thank you. Fabrice \usemodule[tikz] \starttext \startMPcode fill fullcircle xscaled 1cm yscaled 0.88cm shaded withshademethod "circular" withshadefactor 0.75 withshadecolors (white,red); \stopMPcode \starttikzpicture

Re: [NTG-context] Shading

On Tue, 25 Feb 2020 12:34:00 +0100 Fabrice Couvreur wrote: > Hi, > In the Metafun documentation on page 410, there is a shaded bullet "fill > fullcircle shaded cshade". > I tried to reproduce the same effect, but it is not exactly the same result. It's different because your code isn't the same

[NTG-context] Shading

Hi, In the Metafun documentation on page 410, there is a shaded bullet "fill fullcircle shaded cshade". I tried to reproduce the same effect, but it is not exactly the same result. Thank you. Fabrice \starttext \startMPcode fill fullcircle scaled 4cm shaded withshademethod "circular"

Re: [NTG-context] Shading and transparency

On Thu, 12 Jul 2018 22:59:05 +0200 Hans Hagen wrote: > hm, I'm puzzled as a shade doesn't go between colors + transparent > but from one color to another (in the same color space) and > transparency is just a different mechanism > > maybe it was some side effect of chosen values / vectors that

Re: [NTG-context] Shading and transparency

On 7/12/2018 10:08 PM, Marco Patzer wrote: On Thu, 12 Jul 2018 11:21:45 +0200 Hans Hagen wrote: For the old implementation (pre 2016-ish) I had a working solution because shading to transparent colours just worked (at least in my case of a simple transparent shade, nothing fancy), but not so

Re: [NTG-context] Shading and transparency

On Thu, 12 Jul 2018 11:21:45 +0200 Hans Hagen wrote: > > For the old implementation (pre 2016-ish) I had a working solution > > because shading to transparent colours just worked (at least in my > > case of a simple transparent shade, nothing fancy), but not so any > > longer. With the new

Re: [NTG-context] Shading and transparency

On 7/11/2018 11:40 PM, Marco Patzer wrote: On Wed, 11 Jul 2018 23:11:31 +0200 Hans Hagen wrote: Is there a method that does not require an external file or pre-processing? Using the external file works. Just wondering if there's a better - more integrated - way. i guess that with some

Re: [NTG-context] Shading and transparency

On Wed, 11 Jul 2018 23:11:31 +0200 Hans Hagen wrote: > > Is there a method that does not require an external file or > > pre-processing? Using the external file works. Just wondering if > > there's a better - more integrated - way. > i guess that with some experimenting you can come close but

Re: [NTG-context] Shading and transparency

On 7/11/2018 8:45 PM, Marco Patzer wrote: Hi! It's shadings and transparency again. For most things transparency is not required since the background colour (white) can be used instead, to achieve the same effect (thanks Hans for the reimplementation/cleanup a while ago). For one use case I

[NTG-context] Shading and transparency

Hi! It's shadings and transparency again. For most things transparency is not required since the background colour (white) can be used instead, to achieve the same effect (thanks Hans for the reimplementation/cleanup a while ago). For one use case I worked around this by including an external

Re: [NTG-context] Shading to transparent using withshademethod

On 1/28/2016 2:02 PM, Marco Patzer wrote: On Thu, 28 Jan 2016 12:29:46 +0100 Hans Hagen wrote: How to make transparent shadings work with the new mechanism? withtransparency (1,.5) next beta \definecolor [trans] [a=multiply, t=.5, g=.5] \startMPpage fill

Re: [NTG-context] Shading to transparent using withshademethod

On 1/28/2016 3:34 PM, Marco Patzer wrote: On Thu, 28 Jan 2016 14:45:13 +0100 Hans Hagen wrote: On 1/28/2016 1:53 PM, Marco Patzer wrote: On Thu, 28 Jan 2016 12:33:39 +0100 Hans Hagen wrote: How to make transparent shadings work with the new mechanism?

Re: [NTG-context] Shading to transparent using withshademethod

On Thu, 28 Jan 2016 18:26:28 +0100 Hans Hagen wrote: > On 1/28/2016 3:34 PM, Marco Patzer wrote: > > On Thu, 28 Jan 2016 14:45:13 +0100 > > Hans Hagen wrote: > > > >> On 1/28/2016 1:53 PM, Marco Patzer wrote: > >>> On Thu, 28 Jan 2016 12:33:39 +0100 > >>> Hans

Re: [NTG-context] Shading to transparent using withshademethod

On 1/27/2016 10:05 PM, Marco Patzer wrote: Hi, some months ago the withshading, withfromshadecolor etc. have apparently been replaced by the more general withshademethod, withshadevector, withshadecolors, etc. methods. I have issues converting the old withshading code to the withshademethod

Re: [NTG-context] Shading to transparent using withshademethod

On Thu, 28 Jan 2016 12:33:39 +0100 Hans Hagen wrote: > >>> How to make transparent shadings work with the new mechanism? > >> > >> withtransparency (1,.5) > > > > However, this makes the entire shade transparent. How to shade from > > one colour to transparent using

Re: [NTG-context] Shading to transparent using withshademethod

On Thu, 28 Jan 2016 12:29:46 +0100 Hans Hagen wrote: > >> How to make transparent shadings work with the new mechanism? > > > >withtransparency (1,.5) > > next beta > > \definecolor [trans] [a=multiply, t=.5, g=.5] > > \startMPpage > fill fullcircle scaled 12cm

Re: [NTG-context] Shading to transparent using withshademethod

On Thu, 28 Jan 2016 09:43:24 +0100 Hans Hagen wrote: > On 1/27/2016 10:05 PM, Marco Patzer wrote: > > The new code appears to work in general, but only if no shading to > > transparent is being used: > > > > \definecolor [trans] [a=multiply, t=.5, s=.5] > > \starttext > >

Re: [NTG-context] Shading to transparent using withshademethod

On 1/28/2016 9:43 AM, Hans Hagen wrote: On 1/27/2016 10:05 PM, Marco Patzer wrote: Hi, some months ago the withshading, withfromshadecolor etc. have apparently been replaced by the more general withshademethod, withshadevector, withshadecolors, etc. methods. I have issues converting the old

Re: [NTG-context] Shading to transparent using withshademethod

On 1/28/2016 11:45 AM, Marco Patzer wrote: On Thu, 28 Jan 2016 09:43:24 +0100 Hans Hagen wrote: On 1/27/2016 10:05 PM, Marco Patzer wrote: The new code appears to work in general, but only if no shading to transparent is being used: \definecolor [trans] [a=multiply, t=.5,

Re: [NTG-context] Shading to transparent using withshademethod

On Thu, 28 Jan 2016 14:45:13 +0100 Hans Hagen wrote: > On 1/28/2016 1:53 PM, Marco Patzer wrote: > > On Thu, 28 Jan 2016 12:33:39 +0100 > > Hans Hagen wrote: > > > > How to make transparent shadings work with the new mechanism? > >

Re: [NTG-context] Shading to transparent using withshademethod

On 1/28/2016 1:53 PM, Marco Patzer wrote: On Thu, 28 Jan 2016 12:33:39 +0100 Hans Hagen wrote: How to make transparent shadings work with the new mechanism? withtransparency (1,.5) However, this makes the entire shade transparent. How to shade from one colour to

[NTG-context] Shading to transparent using withshademethod

Hi, some months ago the withshading, withfromshadecolor etc. have apparently been replaced by the more general withshademethod, withshadevector, withshadecolors, etc. methods. I have issues converting the old withshading code to the withshademethod version. The old code had no problems shading

Re: [NTG-context] shading

On 2011-05-18 Hans Hagen pra...@wxs.nl wrote: On 18-5-2011 8:30, Marco wrote: % Error % path p; p:=fullsquare scaled 5cm shifted (10cm, 0cm); % fill p % withshading(linear, llcorner p, urcorner p) % withcolor \MPcolor{red-t} shadedinto \MPcolor{blue}; don't ask how, but the

Re: [NTG-context] shading

On 19-5-2011 12:08, Marco wrote: new commands. I can't figure out how to shade from a particular colour to transparent. afaik you can't as one shades from color to color (maybe choosing another transparency method) Hans

Re: [NTG-context] shading

On 2011-05-19 Hans Hagen pra...@wxs.nl wrote: On 19-5-2011 12:08, Marco wrote: new commands. I can't figure out how to shade from a particular colour to transparent. afaik you can't as one shades from color to color (maybe achoosing nother transparency method) As soon as

[NTG-context] shading

Hi, Thanks to Hraban for providing spot-process color examples and Luigi and Taco for testing viewers Duncan can now do more advanced shades, that is, if he weren't using mkii. For this metafun has been extended with a few more shading commands, with the nicest being: path p ; p :=

Re: [NTG-context] shading

For this metafun has been extended with a few more shading commands, with the nicest being: […] Very nice these commands! I like them. But the shadings in MP still have problems with transparency. Example below. I guess, it's not supported. If not, are you planing to add

Re: [NTG-context] shading

Am 2011-05-18 um 20:30 schrieb Marco: For this metafun has been extended with a few more shading commands, with the nicest being: […] Very nice these commands! I like them. But the shadings in MP still have problems with transparency. Example below. I guess, it's not

Re: [NTG-context] shading

On 18-5-2011 8:30, Marco wrote: % The entire square is transparent, % not just the shading part path p; p:=fullsquare scaled 5cm shifted (5cm, 0cm); fill p withshading(linear, llcorner p, urcorner p) withcolor \MPcolor{red} shadedinto \MPcolor{blue-t}; indeed, as transparency is

Re: [NTG-context] shading

On 18-5-2011 8:55, Henning Hraban Ramm wrote: Am 2011-05-18 um 20:30 schrieb Marco: For this metafun has been extended with a few more shading commands, with the nicest being: […] Very nice these commands! I like them. But the shadings in MP still have problems with transparency. Example

Re: [NTG-context] shading

On 18-5-2011 8:30, Marco wrote: % Error % path p; p:=fullsquare scaled 5cm shifted (10cm, 0cm); % fill p % withshading(linear, llcorner p, urcorner p) % withcolor \MPcolor{red-t} shadedinto \MPcolor{blue}; don't ask how, but the upcoming beta can handle it \starttext \definecolor

Re: [NTG-context] shading in metapost

On Jan 16, 2008, at 11:22 PM, John Luciani wrote: There is some information on doing transparencies in METAPOST at http://www-math.univ-poitiers.fr/~phan/metalpha.html Using the code at the above link you should be able to produce the effect in your jpeg. (* jcl *) John, I never thanked

Re: [NTG-context] shading in metapost

Hi Thomas, On Thu, 24 Jan 2008, Thomas A. Schmitz wrote: On Jan 24, 2008, at 1:28 AM, Mojca Miklavec wrote: In theory possible, but in practice not implemented in metafun. But see http://www.fauskes.net/media/pgf/pgfmanualCVS2008-01-23.pdf It might satisfy your needs. (Impressive!)

Re: [NTG-context] shading in metapost

On Jan 24, 2008, at 9:03 AM, Aditya Mahajan wrote: Hi Thomas, On Thu, 24 Jan 2008, Thomas A. Schmitz wrote: I wanted to be clever and do it in a for-loop like this: for i=1 upto 10: pickup pencircle scaled (i*0.5) pt ; draw fullcircle scaled 5mm withcolor transparent

Re: [NTG-context] shading in metapost

Thomas A. Schmitz wrote: I never thanked you for your message; sorry about that! Unless I'm missing something, this page is just about transparency, but that works quite well in metafun; it was the combination of transparency and shading which I couldn't get right. in mkiv at some

Re: [NTG-context] shading in metapost

On Jan 16, 2008 8:07 PM, Thomas A. Schmitz wrote: Hi all, I have a somewhat silly question about metapost/metafun. To emphasize parts of a picture, I place a bright red arrow or circle/ellipse on top of the picture. I would like to make this arrow more visible by putting a shade beneath it

[NTG-context] shading in metapost

Hi all, I have a somewhat silly question about metapost/metafun. To emphasize parts of a picture, I place a bright red arrow or circle/ellipse on top of the picture. I would like to make this arrow more visible by putting a shade beneath it (I attach a jpg that will hopefully show the

Re: [NTG-context] shading in metapost

There is some information on doing transparencies in METAPOST at http://www-math.univ-poitiers.fr/~phan/metalpha.html Using the code at the above link you should be able to produce the effect in your jpeg. (* jcl *) -- http://www.luciani.org

Re: [NTG-context] shading with stitching functions

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

Re: [NTG-context] shading with stitching functions

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

Re: [NTG-context] shading with stitching functions

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

Re: [NTG-context] shading with stitching functions

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

[NTG-context] 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

Re: [NTG-context] shading box many times

Vit Zyka wrote: Hans Hagen wrote: Taco Hoekwater wrote: Hans Hagen wrote: Vit Zyka wrote: Dear Metafun Wizards, I have noticed some strange behaviour with box shading. It works OK until some number of shadings. Please see example: http://typokvitek.com/tmp/shade-many.pdf Any idea

Re: [NTG-context] shading box many times

Vit Zyka wrote: Dear Metafun Wizards, I have noticed some strange behaviour with box shading. It works OK until some number of shadings. Please see example: http://typokvitek.com/tmp/shade-many.pdf Any idea for solving? Next not-minimal but small and illustrative example can help. works

Re: [NTG-context] shading box many times

Hans Hagen wrote: Vit Zyka wrote: Dear Metafun Wizards, I have noticed some strange behaviour with box shading. It works OK until some number of shadings. Please see example: http://typokvitek.com/tmp/shade-many.pdf Any idea for solving? Next not-minimal but small and illustrative

Re: [NTG-context] shading box many times

Hans Hagen wrote: it's related to the fact that there can be 1000 specials only (this /1000 in mp-spec) Why? if you add: \def\MPrgbnumber#1{\expandafter\doMPrgbnumber#1.0\relax} \def\doMPrgbnumber#1.#2#3#4#5#6\relax{#2#3#4#5} \startMPinclusions _special_div_ := 1 ;

Re: [NTG-context] shading box many times

Taco Hoekwater wrote: Whether or not that makes dividing by 10.000 safe is not clear to me. I have to read up on what is going on first. for i=1 upto 1 : show i/1 ; endfor ; indicates that indeed the precision is ok i put a version for testing purposes at

Re: [NTG-context] shading box many times

Vit Zyka wrote: Taco Hoekwater wrote: Hans Hagen wrote: Vit Zyka wrote: Dear Metafun Wizards, I have noticed some strange behaviour with box shading. It works OK until some number of shadings. Please see example: http://typokvitek.com/tmp/shade-many.pdf Any idea for solving? Next

Re: [NTG-context] shading box many times

Hans Hagen wrote: Taco Hoekwater wrote: Hans Hagen wrote: Vit Zyka wrote: Dear Metafun Wizards, I have noticed some strange behaviour with box shading. It works OK until some number of shadings. Please see example: http://typokvitek.com/tmp/shade-many.pdf Any idea for solving? Next

Re: [NTG-context] shading in meta[post/play] PDF

Mojca Miklavec wrote: Problem description: I have a computer program, which carries the data about the grid points on a sphere (possibly with different colors defined in these points) and how the points are connected with each other to form a grid. I would take these triangles (or

Re: [NTG-context] shading in meta[post/play] PDF

Hans Hagen wrote: Mojca Miklavec wrote: How can I make shading inside metapost(play) to produce exactly what's in the attached picture (smooth shades). Or more generally: how can I hardcode some PS/PDF code in .mp, not (yet) supported by metapost(play)? certain kind of native level 2 shaded

[NTG-context] shading in meta[post/play] PDF

There's a wonderful tutorial on drawing 3D graphics in PostScript on http://www.math.ubc.ca/~cass/graphics/manual/, specifically http://www.math.ubc.ca/~cass/graphics/manual/code/doughnut.eps as an example. And there's a detailed description on shading in PostScript in

Re: [NTG-context] Shading transparency / missing linear_shade variant

On Sat, Jul 24, 2004 at 11:36:03AM +0200, Vit Zyka wrote: Furthermore, the shading variants for linear_shade do not correspond with those listed in the metafun manual, page 180. Variant 2 is missing and behaves like variant 3 should. Not so exactly. The today reality is a bit richer than

Re: [NTG-context] Shading transparency / missing linear_shade variant

Eckhart Guthöhrlein wrote: On Sat, Jul 24, 2004 at 11:36:03AM +0200, Vit Zyka wrote: Furthermore, the shading variants for linear_shade do not correspond with those listed in the metafun manual, page 180. Variant 2 is missing and behaves like variant 3 should. Not so exactly. The today

Re: [NTG-context] Shading transparency / missing linear_shade variant

On Tue, Jul 27, 2004 at 01:37:06PM +0200, Hans Hagen wrote: But anyway, transparency is ignored when using shading. Is there any possibility to achieve a gradient from, i.e., completely transparent to completely intransparent white? no(t yet), i dunno if pdf supports that -) That's

Re: [NTG-context] Shading transparency / missing linear_shade variant

Eckhart Guthöhrlein wrote: On Tue, Jul 27, 2004 at 01:37:06PM +0200, Hans Hagen wrote: But anyway, transparency is ignored when using shading. Is there any possibility to achieve a gradient from, i.e., completely transparent to completely intransparent white? no(t yet), i dunno if pdf

Re: [NTG-context] Shading transparency / missing linear_shade variant

Furthermore, the shading variants for linear_shade do not correspond with those listed in the metafun manual, page 180. Variant 2 is missing and behaves like variant 3 should. Not so exactly. The today reality is a bit richer than that in the Metafun manual. One can choose from 8 directions:

[NTG-context] Shading transparency / missing linear_shade variant

Hi all, experimenting with transparencies, I have obviously come to a limitation: color shading does not work for transparent colors. What I have in mind is a bar filled with a color gradient, starting from a certain (non-transparent) color and ending transparent, i.e. vanishing into the