Re: [NTG-context] Fuzzy lines

On Thu, 13 May 2021, Henning Hraban Ramm wrote:

...

Am 11.05.2021 um 18:02 schrieb Aditya Mahajan :

Look at this old code on how hide such code behind a macro to have a clean interface:

https://github.com/adityam/mp-sketch/blob/master/mp-sketch.mp

Hi Aditya, I’m trying to include my additions into your code, but it doesn’t work.

numeric sketch_amount; sketch_amount := 3bp; numeric sketch_passes; sketch_passes := 5;

def sketchdraw expr p = do_sketchdraw(p if (path p): randomized sketch_amount fi) enddef;

def do_sketchdraw(expr p) text t = normaldraw p t ; enddef;

Now I want to draw that path several times.

If I understand it right, I can’t put that into "sketchdraw" because that leaves the end open for path additions like "withcolor".

But it also doesn’t work in "do_sketchdraw"; I thought it might like this:

A slightly different approach is needed. See attached. I also added a bit a error protection in case someone sets sketch_passes to be negative by mistake. It may be interesting to rewrite these macros using the new key-value interface for metapost, so that something like this works: \sketchdraw[amount=3bp, passes=5, transparency=yes] fullsquare scaled 1cm withcolor red;