[NTG-context] Re: Triaging tikz error: Cannot parse this coordinate

[Hans Hagen <j.hagen@xs4all.nl>]

On 8/8/2023 7:43 PM, Hans Hagen wrote:
> On 8/8/2023 6:13 PM, Xavier B. wrote:
>> After some time, I could write a minimal example with tikz with 
>> strange error: Cannot parse this coordinate.
>>
>> Can someone help me to find the bug?
>>
>> I attach the file and the log.
>>
>> Help very appreciate
>> I run
>   \starttikzpicture
>     \foreach \p in {(6,2)}
>     {
>     \tracingall
>       \startscope[shift={\p}]
>          \draw[color=green!60, thick] (0,0) -- (1,1);
>       \stopscope
>     }
>    \stoptikzpicture
> 
> looks like some parsing issue, are you sure that you can assign \p to 
> shift this way?
puzzle:

\startMPcode
     draw textext ("\externalfigure[mill.png][height=1cm]") ;
     draw image (
         draw
             for p = (6,0), (7,0), (5,1), (6,1), (7,1), (1,2), (2,2), 
(3,2), (4,2), (5,2), (7,2), (0,3), (1,3), (3,3), (4,3), (8,3), (0,4), 
(7,4), (8,4), (0,5), (1,5), (2,5), (6,5), (7,5), (2,6), (3,6), (4,6), 
(5,6), (6,6), (3,7), (4,7), (5,7), (6,7) :
                 (
                     (0,0) -- (1,0) -- (1,1) -- (0,1) -- cycle &&&
                     (0,0) -- (1,1) &&
                     (0,1) -- (1,0)
                 ) shifted p &&
             endfor nocycle withcolor red ;
         draw
             for p = (6,2), (2,3), (5,3), (6,3), (7,3), (1,4), (2,4), 
(3,4), (4,4), (5,4), (6,4), (3,5), (4,5), (5,5) :
                 (
                     (0,0) -- (1,0) -- (1,1) -- (0,1) -- cycle &&&
                     (0,0) -- (1,1)
                 ) shifted p &&
             endfor nocycle withcolor green ;
     ) ysized 4cm withpen pencircle scaled .5pt ;
\stopMPcode



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                                           Hans Hagen | PRAGMA ADE
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