Le 2025-10-20 à 03:53, kurtz le pirate a écrit :
> 
> 
> Hello,
> 
> Let an array of "4D" vectors.
> This code works well :
> 
> #write ( FH, Array[i].x,",",Array[i].y,",",Array[i].z,",",Array[i].filter )
> 
> 
> 
> 
> Now with and array of "5D" vectors.
> Base on the same schema i code this :
> 
> #write ( FH, 
> Array[i].x,",",Array[i].y,",",Array[i].z,",",Array[i].filter,",",Array[i].transmit )
> 
> And i get this error : "Expected 'string', colour identifier found 
> instead".
> 
> 
> On <https://wiki.povray.org/content/Reference_Talk:Vector_Expressions> 
> from Bald Eagle, you can read :
> #declare Vector = < 1, 2, 3, 4, 5>;
> ...
> #declare Fifth_Component = Vector.transmit;// 5
> 
> 
> The fifth element corresponds well to the keyword "transmit".
> So why did this error occur?
> 
> I got around the issue like this :
> #declare _x = Array[i].x;
> #declare _y = Array[i].y;
> #declare _z = Array[i].z;
> #declare _f = Array[i].filter;
> #declare _t = Array[i].transmit;
> #write ( FH, _x,",",_y,",",_z,",",_f,",",_t )
> 
> However, I would like to understand what is wrong with my syntax.
> Thank you for your help.
> 

Working from William's reply, I have this workaround :
Replace :
#write ( 
FH,Array[i].x,",",Array[i].y,",",Array[i].z,",",Array[i].filter,",",Array[i].transmit 
)

With :
#declare Trans = Array[i].transmit;
#write ( FH, 
Array[i].x,",",Array[i].y,",",Array[i].z,",",Array[i].filter,",",Trans )

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