[NTG-context] MP figure continuation

[Alan Braslau]

On Fri, 6 Jan 2023 15:43:07 +0100
Alexandre Christe via ntg-context <ntg-context at ntg.nl> wrote:

> Dear list,
> 
> Is there a way to "continue" an MP figure? Like keeping the axes,
> etc. and just adding code to the figure?
> 
> Maybe I missed something, otherwise I'd find it super useful.
> 
> Thanks in advance and happy new year,
> Alex

Another solution is to save the picture:

\startMPcode

draw fullcircle scaled 1cm ;
picture mypicture ; mypicture := currentpicture ;

\stopMPcode

Then, the next call to \startMPcode (or whatever you use) will have
access to the saved picture.

\startMPcode

currentpicture := mypicture ;
draw unitsquare scaled 1cm withcolor red ;

\stopMPcode

currentpicture is reset for each MP call.

Of course, you must not use
	save mypicture ; picture mypicture ;
because that will make it local.

Alan