[NTG-context] 'debug' version of METAPOST draw?

Keith McKay mckaymeister at gmail.com
Thu May 28 21:24:52 CEST 2020

Would Chapter 11, section 11.1 Showing Paths of the MetaPost manual, be 
any help here?

Below is a MWE of a random path of curves and straight lines. The points 
are shown using drawpoints. The arrow path and control lines are also 
shown and are better described in the Metapost manual.


\setuppapersize [A4,landscape]




width := PaperWidth ; height := PaperHeight ; unit := cm ;

path p ;

path pat;

pat := (5cm,5cm);

for a = 1 step 1 until 10:

x:= uniformdeviate(10) +10;

y:= uniformdeviate(10) +10;

if odd a:

pat := pat .. (x*cm,y*cm);


pat := pat -- (x*cm,y*cm);


draw pat withpen pencircle scaled 5mm withcolor .5green;


drawarrowpath pat;

drawpoints pat;

drawcontrollines pat withcolor .625red ;




%%%%%%%%%%%%%%% end MWE %%%%%%%%%%%%%%%%%

A better coder than me may be able to incorporate it into what you require.

Best Wishes

Keith McKay

On 28/05/2020 12:33, Gerben Wierda wrote:
> I would like to be able (during development) to draw paths where the points of the path (and maybe thing slike directions) are visualised. E.g. a path where each pair in teh path is also drawn as a dot and maybe teh directions drawn as small arrows.
> Does someone have such a beast lying around?
> G
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