* Re: metapost fill between outlines
@ 2011-02-21 5:12 Reviczky, Adam
2011-02-21 5:20 ` Hongwen Qiu
0 siblings, 1 reply; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-21 5:12 UTC (permalink / raw)
To: ntg-context
> \startMPpage
> path p ;
> p := fullcircle scaled 1cm ;
> path q ;
> q := fullcircle scaled .5cm ;
> path r ;
> r := p -- reverse q -- cycle ;
> drawarrow r withcolor green ;
> fill r withcolor red ;
> \stopMPpage
>
> This works here.
Based on this I can now cut out the smaller one from a fullcircle, but it still fails with two paths having controls (or maybe because of something else).
Here are the examples:
%%%
\starttext
\framed[background=color,backgroundcolor=red,height=fit,width=fit]{
\startMPcode
path p[];
p1 := fullcircle scaled 2cm;
p2 := (7.488280,12.293000)..controls (4.933590,12.293000) and (1.265620,6.226560)..(1.265620,2.531250)..controls (1.265620,1.562500) and (1.695310,0.835938)..(2.722660,0.835938)..controls (5.230470,0.835938) and (8.972660,7.035160)..(8.972660,10.296900)..controls (8.972660,11.269500) and (8.703120,12.293000)..(7.488280,12.293000)--cycle;
p3 := p1 -- reverse p2 -- cycle;
fill p3 withcolor black;
\stopMPcode
}
\stoptext
%%%
This works.
%%%
\starttext
\framed[background=color,backgroundcolor=red,height=fit,width=fit]{
\startMPcode
path p[];
p1 := (6.949220,13.046900)..controls (9.539060,13.046900) and (10.023400,10.781200)..(10.023400,8.679690)..controls (10.023400,5.335940) and (6.949220,0.000000)..(3.234380,0.000000)..controls (0.890625,0.000000) and (0.000000,1.886720)..(0.000000,3.828120)..controls (0.000000,8.492190) and (3.316410,13.046900)..(6.949220,13.046900) --cycle;
p2 := (7.488280,12.293000)..controls (4.933590,12.293000) and (1.265620,6.226560)..(1.265620,2.531250)..controls (1.265620,1.562500) and (1.695310,0.835938)..(2.722660,0.835938)..controls (5.230470,0.835938) and (8.972660,7.035160)..(8.972660,10.296900)..controls (8.972660,11.269500) and (8.703120,12.293000)..(7.488280,12.293000)--cycle;
p3 := p1 -- reverse p2 -- cycle;
fill p3 withcolor black;
\stopMPcode
}
\stoptext
%%%
This doesn't work.
(It fails already if "p1 := (0,0)..(0,20)..(20,20)..cycle;" or similar.)
Any hints?
Adam
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^ permalink raw reply [flat|nested] 13+ messages in thread* Re: metapost fill between outlines
2011-02-21 5:12 metapost fill between outlines Reviczky, Adam
@ 2011-02-21 5:20 ` Hongwen Qiu
0 siblings, 0 replies; 13+ messages in thread
From: Hongwen Qiu @ 2011-02-21 5:20 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 02/21/2011 01:12 PM, Reviczky, Adam wrote:
> \starttext
> \framed[background=color,backgroundcolor=red,height=fit,width=fit]{
> \startMPcode
> path p[];
> p1 := (6.949220,13.046900)..controls (9.539060,13.046900) and (10.023400,10.781200)..(10.023400,8.679690)..controls (10.023400,5.335940) and (6.949220,0.000000)..(3.234380,0.000000)..controls (0.890625,0.000000) and (0.000000,1.886720)..(0.000000,3.828120)..controls (0.000000,8.492190) and (3.316410,13.046900)..(6.949220,13.046900) --cycle;
>
> p2 := (7.488280,12.293000)..controls (4.933590,12.293000) and (1.265620,6.226560)..(1.265620,2.531250)..controls (1.265620,1.562500) and (1.695310,0.835938)..(2.722660,0.835938)..controls (5.230470,0.835938) and (8.972660,7.035160)..(8.972660,10.296900)..controls (8.972660,11.269500) and (8.703120,12.293000)..(7.488280,12.293000)--cycle;
>
> p3 := p1 -- reverse p2 -- cycle;
> fill p3 withcolor black;
> \stopMPcode
> }
> \stoptext
> %%%
> This doesn't work.
\starttext
\framed[background=color,backgroundcolor=red,height=fit,width=fit]{
\startMPcode
path p[];
p1 := (6.949220,13.046900)..controls (9.539060,13.046900) and
(10.023400,10.781200)..(10.023400,8.679690)..controls
(10.023400,5.335940) and
(6.949220,0.000000)..(3.234380,0.000000)..controls (0.890625,0.000000)
and (0.000000,1.886720)..(0.000000,3.828120)..controls
(0.000000,8.492190) and (3.316410,13.046900)..(6.949220,13.046900) --cycle;
p2 := (7.488280,12.293000)..controls (4.933590,12.293000) and
(1.265620,6.226560)..(1.265620,2.531250)..controls (1.265620,1.562500)
and (1.695310,0.835938)..(2.722660,0.835938)..controls
(5.230470,0.835938) and
(8.972660,7.035160)..(8.972660,10.296900)..controls (8.972660,11.269500)
and (8.703120,12.293000)..(7.488280,12.293000)--cycle;
drawarrow p1 withcolor green ;
drawarrow p2 withcolor blue ;
p3 := p1 -- p2 -- cycle;
fill p3 withcolor black;
\stopMPcode
}
\stoptext
Maybe you can know why now, from the above code. The direction of the
path is important.
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: metapost fill between outlines
@ 2011-02-21 9:09 Reviczky, Adam
2011-02-21 9:27 ` Hongwen Qiu
2011-02-21 9:42 ` Mojca Miklavec
0 siblings, 2 replies; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-21 9:09 UTC (permalink / raw)
To: ntg-context
The only letter ("g") I have left in the logo has two spaces that I want to cut out.
I can't make a single path out of it so that it doesn't go through the entire letter, so what to do in this case?
Here's the example:
%%%
\starttext
\framed[background=color,backgroundcolor=red,height=fit,width=fit]{
\startMPcode
path gb[],gf[],gc[];
gb1 := (100.023003,46.691399)..controls (100.023003,47.015598) and (100.348000,47.203098)..(100.969002,47.203098)
..controls (101.859001,47.203098) and (101.859001,46.855499)..(102.371002,46.855499)
..controls (102.695000,46.855499) and (102.991997,47.015598)..(102.991997,47.582001)
..controls (102.991997,48.066399) and (102.530998,48.230499)..(102.101997,48.230499)
..controls (101.616997,48.230499) and (100.996002,48.093800)..(100.348000,47.664101)
..controls (100.188004,47.527302) and (99.781197,47.339802)..(99.539101,47.500000)
..controls (99.027298,47.851601) and (98.570297,48.093800)..(97.355499,48.093800)
..controls (96.144501,48.093800) and (94.363297,47.367199)..(93.230499,45.828098)
..controls (92.421898,44.695301) and (92.261703,43.886700)..(92.261703,43.078098)
..controls (92.261703,42.269501) and (92.585899,41.675800)..(92.828102,41.355499)
..controls (92.878899,41.273399) and (92.906197,41.218800)..(92.906197,41.136700)
..controls (92.906197,40.949200) and (92.664101,40.812500)..(92.261703,40.707001)
..controls (91.531197,40.464802) and (90.320297,39.761700)..(90.320297,38.523399)
..controls (90.320297,37.714802) and (90.964798,36.933601)..(91.695297,36.445301)
..controls (91.695297,36.445301) and (90.210899,36.042999)..(89.023399,35.394501)
..controls (88.109398,34.882801) and (87.082001,34.101601)..(87.082001,32.968800)
..controls (87.082001,31.675800) and (88.191399,29.570299)..(92.746101,29.570299)
..controls (95.414101,29.570299) and (97.085899,30.539101)..(97.734398,31.269501)
..controls (98.218803,31.835899) and (98.296898,32.484402)..(98.296898,32.886700)
..controls (98.296898,34.343800) and (96.683601,35.718800)..(94.902298,36.687500)
..controls (93.769501,37.335899) and (92.097702,38.117199)..(92.097702,39.277302)
..controls (92.097702,39.574200) and (92.179703,39.898399)..(92.503899,40.085899)
..controls (92.718803,40.250000) and (93.070297,40.328098)..(93.445297,40.328098)
..controls (93.957001,40.328098) and (94.605499,40.167999)..(95.066399,40.167999)
..controls (96.519501,40.167999) and (98.488297,40.652302)..(99.703102,43.242199)
..controls (100.023003,43.968800) and (100.160004,44.695301)..(100.160004,45.316399)
..controls (100.160004,46.125000) and (100.023003,46.316399)..(100.023003,46.691399)
--cycle;
drawdot (100.023003,46.691399) withcolor blue withpen pencircle scaled 2pt;
gf2 := (92.960899,30.351601)..controls (89.968803,30.351601) and (89.078102,32.078098)..(89.078102,32.941399)
..controls (89.078102,33.750000) and (89.402298,34.261700)..(90.210899,34.828098)
..controls (90.777298,35.234402) and (91.613297,35.636700)..(92.261703,35.878899)
..controls (92.988297,35.558601) and (94.093803,34.910198)..(94.445297,34.585899)
..controls (96.062500,33.453098) and (96.386703,32.808601)..(96.386703,32.242199)
..controls (96.386703,30.703100) and (94.093803,30.351601)..(92.960899,30.351601)
--cycle;
drawdot (92.960899,30.351601) withcolor green withpen pencircle scaled 2pt;
gf1 := (98.867203,46.367199)..controls (98.867203,45.585899) and (98.570297,44.535198)..(97.894501,43.402302)
..controls (96.628899,41.355499) and (95.628899,40.949200)..(94.769501,40.949200)
..controls (94.039101,40.949200) and (93.714798,41.542999)..(93.714798,42.406200)
..controls (93.714798,43.160198) and (94.039101,44.132801)..(94.605499,45.019501)
..controls (95.468803,46.394501) and (96.683601,47.527302)..(97.761703,47.527302)
..controls (98.488297,47.527302) and (98.867203,47.175800)..(98.867203,46.367199)
--cycle;
drawdot (98.867203,46.367199) withcolor yellow withpen pencircle scaled 2pt;
gc1 := gb1 -- gf1 -- cycle;
gc2 := gc1 -- gf2 -- cycle;
fill gc2;
\stopMPcode
}
\stoptext
%%%
How do I get rid of the crossing line?
Adam
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^ permalink raw reply [flat|nested] 13+ messages in thread* Re: metapost fill between outlines
2011-02-21 9:09 Reviczky, Adam
@ 2011-02-21 9:27 ` Hongwen Qiu
2011-02-21 9:42 ` Mojca Miklavec
1 sibling, 0 replies; 13+ messages in thread
From: Hongwen Qiu @ 2011-02-21 9:27 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 02/21/2011 05:09 PM, Reviczky, Adam wrote:
> The only letter ("g") I have left in the logo has two spaces that I want to cut out.
> I can't make a single path out of it so that it doesn't go through the entire letter, so what to do in this case?
Can't you construct four outlines instead of three, so that you can
construct two paths for filling. Hope you understand what I mean.
___________________________________________________________________________________
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^ permalink raw reply [flat|nested] 13+ messages in thread* Re: metapost fill between outlines
2011-02-21 9:09 Reviczky, Adam
2011-02-21 9:27 ` Hongwen Qiu
@ 2011-02-21 9:42 ` Mojca Miklavec
2011-02-21 10:04 ` Reviczky, Adam
1 sibling, 1 reply; 13+ messages in thread
From: Mojca Miklavec @ 2011-02-21 9:42 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Reviczky, Adam
On Mon, Feb 21, 2011 at 10:09, Reviczky, Adam <adam.reviczky@kcl.ac.uk> wrote:
> The only letter ("g") I have left in the logo has two spaces that I want to cut out.
> I can't make a single path out of it so that it doesn't go through the entire letter, so what to do in this case?
Just as a thought ... what you currently do with metapost at the
moment is a bit of cheating to overcome lack of a feature in metapost
- there is still an infinitely thin line between segments and a dumb
renderer might display artifacts.
If I wanted to draw a logo (very important graphic that will be used
more often) and if I had control points, I would consider creating a
raw postscript (EPS) graphics (filling with even-odd rule), convert it
to PDF when needed and then use it inside ConTeXt documents (or even
inside metapost graphics) as-is.
You could also manually post-process the graphic generated by metapost
(removing the link between the inner and outer part of letters and
properly fill).
But if the current approach is fine with you ... just use it.
Mojca
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 13+ messages in thread* Re: metapost fill between outlines
2011-02-21 9:42 ` Mojca Miklavec
@ 2011-02-21 10:04 ` Reviczky, Adam
0 siblings, 0 replies; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-21 10:04 UTC (permalink / raw)
To: Mojca Miklavec, mailing list for ConTeXt users
>> Just as a thought ... what you currently do with metapost at the
>> moment is a bit of cheating to overcome lack of a feature in metapost
>> - there is still an infinitely thin line between segments and a dumb
>> renderer might display artifacts.
Yes, I am aware of this, just wanted to hear something from those who know metapost better.
>> If I wanted to draw a logo (very important graphic that will be used
>> more often) and if I had control points, I would consider creating a
>> raw postscript (EPS) graphics (filling with even-odd rule), convert it
>> to PDF when needed and then use it inside ConTeXt documents (or even
>> inside metapost graphics) as-is.
I'm doing something like that already, I was just curious to which extend I could use metapost for this.
>> You could also manually post-process the graphic generated by metapost
>> (removing the link between the inner and outer part of letters and
>> properly fill).
>> But if the current approach is fine with you ... just use it.
I think I'm happy with this solution. (Also, I was looking at the graphictext function, isn't that also doing similar things for filling out letters?)
>> Mojca
Thanks for explaining this!
Adam
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^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: metapost fill between outlines
@ 2011-02-21 6:41 Reviczky, Adam
2011-02-21 6:55 ` Hongwen Qiu
0 siblings, 1 reply; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-21 6:41 UTC (permalink / raw)
To: ntg-context
So with this method, I can cut out some fillings of letters in a logo,
but for this example it draws a small line through the letter:
%%%
\starttext
\framed[background=color,backgroundcolor=red,height=fit,width=fit]{
\startMPcode
path db[],df[],dc[];
drawoptions (withcolor (0.000000,0.329412,0.560784));
db1 := (86.812500,0.519531)--(92.457001,0.519531)--(92.457001,32.386700)
--(86.812500,32.386700)--(86.812500,19.679701)--(86.722702,19.679701)
..controls (85.390602,21.589800) and (82.816399,22.718800)..(79.929703,22.718800)
..controls (73.976601,22.718800) and (69.800797,17.253901)..(69.800797,11.617200)
..controls (69.800797,4.683590) and (73.664101,0.000000)..(79.484398,0.000000)
..controls (82.949203,0.000000) and (85.257797,1.820310)..(86.722702,3.640620)
--(86.812500,3.640620)--cycle;
df1 := (81.437500,19.246099)..controls (84.992203,19.246099) and (86.812500,15.734400)..(86.812500,11.964800)
..controls (86.812500,7.625000) and (85.128899,3.464840)..(81.171898,3.464840)
..controls (77.753899,3.464840) and (76.062500,7.542970)..(76.062500,11.746100)
..controls (76.062500,15.953100) and (77.621101,19.246099)..(81.437500,19.246099)
--cycle;
draw db1; draw df1;
dc1 := db1 -- df1 -- cycle;
fill dc1;
\stopMPcode
}
\stoptext
%%%
Can this be solved somehow?
Adam
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^ permalink raw reply [flat|nested] 13+ messages in thread* Re: metapost fill between outlines
2011-02-21 6:41 Reviczky, Adam
@ 2011-02-21 6:55 ` Hongwen Qiu
0 siblings, 0 replies; 13+ messages in thread
From: Hongwen Qiu @ 2011-02-21 6:55 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 02/21/2011 02:41 PM, Reviczky, Adam wrote:
> but for this example it draws a small line through the letter:
\starttext
\framed[background=color,backgroundcolor=red,height=fit,width=fit]{
\startMPcode
path db[],df[],dc[];
drawoptions (withcolor (0.000000,0.329412,0.560784));
db1 := (86.812500,0.519531)--(92.457001,0.519531)--(92.457001,32.386700)
--(86.812500,32.386700)--(86.812500,19.679701)--(86.722702,19.679701)
..controls (85.390602,21.589800) and
(82.816399,22.718800)..(79.929703,22.718800)
..controls (73.976601,22.718800) and
(69.800797,17.253901)..(69.800797,11.617200)
..controls (69.800797,4.683590) and
(73.664101,0.000000)..(79.484398,0.000000)
..controls (82.949203,0.000000) and
(85.257797,1.820310)..(86.722702,3.640620)
--(86.812500,3.640620)--cycle;
df1 := (81.437500,19.246099)..controls (84.992203,19.246099) and
(86.812500,15.734400)..(86.812500,11.964800)
..controls (86.812500,7.625000) and
(85.128899,3.464840)..(81.171898,3.464840)
..controls (77.753899,3.464840) and
(76.062500,7.542970)..(76.062500,11.746100)
..controls (76.062500,15.953100) and
(77.621101,19.246099)..(81.437500,19.246099)
--cycle;
dc1 := db1 -- df1 -- cycle;
fill dc1;
drawdot (86.812500,0.519531) withcolor blue withpen pencircle scaled 2pt;
drawdot (81.437500, 19.246099) withcolor green withpen pencircle scaled 2pt;
drawarrow db1 withcolor green; drawarrow df1 withcolor blue;
drawarrow dc1 withcolor white;
\stopMPcode
}
\stoptext
The above code is just intend to tell you that you can change the way
you construct db1 and df1 to achieve your desired results. The actual
changes necessary to this example are not given.
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: metapost fill between outlines
@ 2011-02-21 5:29 Reviczky, Adam
0 siblings, 0 replies; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-21 5:29 UTC (permalink / raw)
To: ntg-context
>> Maybe you can know why now, from the above code. The direction of the
>> path is important.
I get it now, thanks for your help!
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^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: metapost fill between outlines
@ 2011-02-20 19:52 Reviczky, Adam
2011-02-21 3:27 ` Hongwen Qiu
0 siblings, 1 reply; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-20 19:52 UTC (permalink / raw)
To: mailing list for ConTeXt users
> You can fill out the bigger one, than clips the smaller one.
Can you give me an example with the clip? I can't get it work in a way I want to have it.
I've found another thread here: http://www.tug.org/pipermail/metapost/2006-September/000650.html
But I fail to see the conclusion there too.
> And alternately, you can construct the path of the difference out of the
> two circles, and fill the constructed path.
As for the path of the difference, how do you mean that? Example?
Adam
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^ permalink raw reply [flat|nested] 13+ messages in thread
* metapost fill between outlines
@ 2011-02-20 8:25 Reviczky, Adam
2011-02-20 8:41 ` Hongwen Qiu
0 siblings, 1 reply; 13+ messages in thread
From: Reviczky, Adam @ 2011-02-20 8:25 UTC (permalink / raw)
To: ntg-context
Hi
Is it possible to fill out a space between two outlines?
As for an example, I'd like to draw two circles (same center, one bigger than the other) and fill out the difference.
Something like the letter "O".
Here's a concrete example:
%%%
draw (6.949220,13.046900)..controls (9.539060,13.046900) and (10.023400,10.781200)..(10.023400,8.679690)
..controls (10.023400,5.335940) and (6.949220,0.000000)..(3.234380,0.000000)
..controls (0.890625,0.000000) and (0.000000,1.886720)..(0.000000,3.828120)
..controls (0.000000,8.492190) and (3.316410,13.046900)..(6.949220,13.046900)
--cycle;
draw (7.488280,12.293000)..controls (4.933590,12.293000) and (1.265620,6.226560)..(1.265620,2.531250)
..controls (1.265620,1.562500) and (1.695310,0.835938)..(2.722660,0.835938)
..controls (5.230470,0.835938) and (8.972660,7.035160)..(8.972660,10.296900)
..controls (8.972660,11.269500) and (8.703120,12.293000)..(7.488280,12.293000)
--cycle;
%%%
I want to fill out the space between these two draw lines.
Is this actually possible? The only reference to this I found was on wikipedia: "Most notably, paths can have only one segment (so that regions are simply connected), (...)" (http://en.wikipedia.org/wiki/MetaPost).
I thought I ask here before I put this aside.
As a workaround I fill out the bigger one with color black and the smaller one with color white, but I need to put this on different background colors, so the use of this is very limited.
How does it work with fonts (Metafont)? Who's filling that out, because thats also just based on outlines, right?
Thanks
Adam
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^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: metapost fill between outlines
2011-02-20 8:25 Reviczky, Adam
@ 2011-02-20 8:41 ` Hongwen Qiu
0 siblings, 0 replies; 13+ messages in thread
From: Hongwen Qiu @ 2011-02-20 8:41 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 02/20/2011 04:25 PM, Reviczky, Adam wrote:
> As a workaround I fill out the bigger one with color black and the smaller one with color white, but I need to put this on different background colors, so the use of this is very limited.
You can fill out the bigger one, than clips the smaller one.
And alternately, you can construct the path of the difference out of the
two circles, and fill the constructed path.
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2011-02-21 10:04 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-02-21 5:12 metapost fill between outlines Reviczky, Adam
2011-02-21 5:20 ` Hongwen Qiu
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2011-02-21 9:09 Reviczky, Adam
2011-02-21 9:27 ` Hongwen Qiu
2011-02-21 9:42 ` Mojca Miklavec
2011-02-21 10:04 ` Reviczky, Adam
2011-02-21 6:41 Reviczky, Adam
2011-02-21 6:55 ` Hongwen Qiu
2011-02-21 5:29 Reviczky, Adam
2011-02-20 19:52 Reviczky, Adam
2011-02-21 3:27 ` Hongwen Qiu
2011-02-20 8:25 Reviczky, Adam
2011-02-20 8:41 ` Hongwen Qiu
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