> 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
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