Re: [NTG-context] Vector Brushes for MetaFun?
> Am 01.09.2021 um 14:06 schrieb Hans Hagen via ntg-context > : > > On 9/1/2021 12:48 PM, Henning Hraban Ramm via ntg-context wrote: >> Hi, since Jacob started the pony mode, here’s one I’d like to ride: >> MetaPost pens are constant, i.e. they never change over the length of a path. >> Commercial vector graphics apps have “vector brushes”, e.g. Adobe Fresco: >> https://helpx.adobe.com/fresco/using/vector-brushes.html >> The page nicely shows the necessary variables. >> In Inkscape you can combine “brush images” like >> https://publicdomainvectors.org/en/free-clipart/Paintbrushes-for-Inkscape/86586.html >> with pen shapes: >> https://logosbynick.com/custom-brushes-in-inkscape/ >> This stretches the whole shape over the path – not perfect but good enough >> (and the same what e.g. “my” Affinity Designer does). >> (https://affinity.serif.com/designer/) >> Is this possible with MetaFun, i.e. use a closed path and distort/stretch it >> along an open path? >> If, how? > you can try to 'reverse engineer the result' and see what is done by looking > at the output The Inkscape SVG just calls a path-effect "bend_path", see attachment. If I save a “normal” SVG, the result is “flattened” into a path that looks the same but isn’t changeable any more. > anyway, i guess it some mix of existing basics, as in > > \starttext > > \startMPcode >path p ; p := >( unitcircle xscaled (5cm randomized 5mm) yscaled (4cm > randomized 3mm)) -- >(reverse (unitcircle xscaled (5cm randomized 3mm) yscaled (4cm > randomized 5mm))) -- cycle; >draw (p) > % withpattern image (fill fullcircle scaled 2mm withcolor > "darkyellow" ;) > % withpattern image (draw figure "mill.png" ;) >withpattern image (draw figure "hacker.jpg" ;) >withpatternscale (1/40,1/80) >; > > \stopMPcode > > \stoptext > > so, fills, eofills, patterns and such I tried to convert my “brush” into MP, but pstoedit fails on either SVG. It worked via an exported EPS though, see attachment. I could then use the brush as a path, also with "withpattern", but that doesn’t stretch/distort the “pattern” along the path. And I don’t understand how the other fill options would do that. Yes, I must learn more about MetaPost... Hraban brush.mp Description: Binary data ___ 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 webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Vector Brushes for MetaFun?
On 9/1/2021 12:48 PM, Henning Hraban Ramm via ntg-context wrote: Hi, since Jacob started the pony mode, here’s one I’d like to ride: MetaPost pens are constant, i.e. they never change over the length of a path. Commercial vector graphics apps have “vector brushes”, e.g. Adobe Fresco: https://helpx.adobe.com/fresco/using/vector-brushes.html The page nicely shows the necessary variables. In Inkscape you can combine “brush images” like https://publicdomainvectors.org/en/free-clipart/Paintbrushes-for-Inkscape/86586.html with pen shapes: https://logosbynick.com/custom-brushes-in-inkscape/ This stretches the whole shape over the path – not perfect but good enough (and the same what e.g. “my” Affinity Designer does). (https://affinity.serif.com/designer/) Is this possible with MetaFun, i.e. use a closed path and distort/stretch it along an open path? If, how? you can try to 'reverse engineer the result' and see what is done by looking at the output anyway, i guess it some mix of existing basics, as in \starttext \startMPcode path p ; p := fullcircle scaled 4cm ; for i=1 upto 10 : nodraw p xscaled (1 randomized .1) yscaled (1 randomized .1) ; endfor ; dodraw p xscaled (1 randomized .1) yscaled (1 randomized .1) withtransparency (1,.5) ; \stopMPcode \startMPcode path p ; p := fullcircle scaled 4cm ; for i=1 upto 10 : draw p xscaled (1 randomized .1) yscaled (1 randomized .1) withtransparency (1,.5) ; endfor ; draw p xscaled (1 randomized .1) yscaled (1 randomized .1) withtransparency (1,.5) ; \stopMPcode \startMPcode path p ; p := ( unitcircle xscaled (5cm randomized 5mm) yscaled (4cm randomized 3mm)) -- (reverse (unitcircle xscaled (5cm randomized 3mm) yscaled (4cm randomized 5mm))) -- cycle; draw (p) % withpattern image (fill fullcircle scaled 2mm withcolor "darkyellow" ;) % withpattern image (draw figure "mill.png" ;) withpattern image (draw figure "hacker.jpg" ;) withpatternscale (1/40,1/80) ; \stopMPcode \stoptext so, fills, eofills, patterns and such Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl - ___ 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 webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
[NTG-context] Vector Brushes for MetaFun?
Hi, since Jacob started the pony mode, here’s one I’d like to ride: MetaPost pens are constant, i.e. they never change over the length of a path. Commercial vector graphics apps have “vector brushes”, e.g. Adobe Fresco: https://helpx.adobe.com/fresco/using/vector-brushes.html The page nicely shows the necessary variables. In Inkscape you can combine “brush images” like https://publicdomainvectors.org/en/free-clipart/Paintbrushes-for-Inkscape/86586.html with pen shapes: https://logosbynick.com/custom-brushes-in-inkscape/ This stretches the whole shape over the path – not perfect but good enough (and the same what e.g. “my” Affinity Designer does). (https://affinity.serif.com/designer/) Is this possible with MetaFun, i.e. use a closed path and distort/stretch it along an open path? If, how? Hraban ___ 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 webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
