[metapost] fill bpath does not work

[j.romildo at gmail.com]

On Mon, Oct 09, 2006 at 04:14:03PM -0300, j.romildo at gmail.com wrote:

> I have a small metapost figure which is not built as I expect. The
> metapost program is as follows:

Well, the program I have posted is the one that produces the second
image (the expected one, without the "bug").

> 
>    % test.mp
> 
>    prologues := 2;
>    input boxes;
> 
>    beginfig(6)
>      boxjoin(  a.e = b.w - (4mm,0) );
>      boxit.a1("1");
>      boxit.a2("2");
>      boxit.a3("3");
>      fill bpath a1 withcolor 0.8white;
>      fill bpath a2 withcolor white;
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This line should be commented out.

>      fill bpath a3 withcolor 0.8white;
>      drawboxed(a1,a2,a3);
>    endfig;
> 
>    end
> 
> And the output image can be seen at
> http://www.decom.ufop.br/prof/romildo/misc/test.6, while the the figure
> I was expecting should look like this
> http://www.decom.ufop.br/prof/romildo/misc/test.new.6
> 
> Can anybody take a quick look at this and tell me why that happens?

I will be gratefull if you could try the program with that line
commented out.

Romildo