[NTG-context] Re: The graph is not visible.

[Aditya Mahajan <adityam@umich.edu>]

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On Fri, 26 Apr 2024, Taco Hoekwater wrote:

> 
> 
> > On 25 Apr 2024, at 23:12, Fabrice Couvreur <fabrice1.couvreur@gmail.com> wrote:
> > 
> > Hi,
> > Here is the code that interferes with the graph from the last chapter but why ?
> 
> Because of this “path b”:
>       
> >              path circle, p, q, b;
> 
> which interferes with the assignment line from the other graphic code:
> 
> >              b := xpart(reverse C_f intersectionpoint reverse C_g);
> 
> because there “b” is a now a path, not a numeric.
> 
> Adding 
> 
>    numeric a,b;
> 
> fixes the problem in chapter 14. 

Woundn't newnumeric be better? 

There are very few instances where I want variables defined in one block to be reused in another block. So, I almost always use

\startMPcode
begingroup;
....
endgroup;
\stopMPcode

to avoid such issues. 

Aditya

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