[NTG-context] About macro numberstriped ()

Fabrice Couvreur fabrice1.couvreur at gmail.com
Sun Oct 2 13:02:59 CEST 2022


I just tried but I got an empty file...
Do we agree that I have to replace the two lines with the other two ?
Regarding what you proposed, how to get the same type of hatching in both
figures ?

 \startMPcode
    path p, q, r, b ;
    p  := unitsquare xyscaled (4cm,4cm) ;
    z[0] = (2cm,0cm) ;
    z[1] = (2cm,4cm) ;
    z[2] = (0cm,2cm) ;
    q := llcorner p--z[0]--z[1]--z[2]--cycle ;
    r := unitsquare xyscaled (1cm,1cm) shifted(0,3cm) ;
    b := (0cm,0cm) -- lrcorner r -- lrcorner p -- cycle;

     draw r
         withpattern image (
             draw (llcorner unitsquare -- urcorner unitsquare) scaled 5mm ;
             % how to get the corner dots
         )
         withpatternscale 1/4
         withpen pencircle scaled 1bp
         withcolor green
     ;
    draw b
         withpattern image (
             draw (llcorner unitsquare -- urcorner unitsquare) scaled 5mm ;
             % how to get the corner dots
         )
         withpatternscale 1/16
         withpen pencircle scaled 1bp
         withcolor green
     ;


    draw b  withpen pencircle scaled 1bp  withcolor darkgreen;
    draw r  withpen pencircle scaled 1bp  withcolor darkgreen;
    draw p;

    label.llft("B", p) ;
    label.lrt("C", p) ;
    label.ulft("A", p) ;
    label.urt("D", p) ;
    label.urt("F", lrcorner r) ;
    label.lft("E", llcorner r) ;
    label.top("G", urcorner r) ;

  \stopMPcode

Le dim. 2 oct. 2022 à 11:52, Hans Hagen via ntg-context <ntg-context at ntg.nl>
a écrit :

> On 10/2/2022 11:20 AM, Floris van Manen via ntg-context wrote:
> >
> >
> > On 02/10/2022 10:55, Fabrice Couvreur via ntg-context wrote:
> >> Initially, there was a bug with maro numberstriped() and Hans
> >> suggested another sensible approach to me, but you don't get the same
> >> shape of the hatches depending on the dimensions of the squares.
> >
> > some unexpected side effect show up when the unitsquare is xyscaled to a
> > rectangle like (2.5cm,1cm)
> > it seems related to the angle chosen
> >
> > e.g.
> >
> >
> >
> > \startMPcode
> >
> > path p, q, r, b ;
> > p  := unitsquare xyscaled (4cm,4cm) ;
> > q := unitsquare xyscaled (1cm,1cm) shifted(0,3cm) ;
> > r := unitsquare xyscaled (2.5cm,1cm) shifted(1cm,3cm) ;
> > b := unitsquare xyscaled (3cm,3cm) shifted(1cm,0) ;
> >
> > draw r anglestriped (1,35,2) withcolor red;
> > draw q anglestriped (1,35,2) withcolor green;
> > draw b anglestriped (1,35,2) withcolor cyan;
> > draw p;
> > draw q;
> > draw b;
> > draw r;
> >
> > label.llft("D", p) ;
> > label.lrt("C", p) ;
> > label.ulft("A", p) ;
> > label.urt("B", p) ;
> > label.urt("P", lrcorner r) ;
> > label.lft("Q", llcorner r) ;
> > label.top("M", urcorner r) ;
> >
> > \stopMPcode
>
> for that you can patch mp-tool.mpxl (l 676):
>
>          maximum := max (xpart llcorner mask, xpart urcorner mask, ypart
> llcorner mask, ypart urcorner mask) ;
>          minimum := min (xpart llcorner mask, xpart urcorner mask, ypart
> llcorner mask, ypart urcorner mask) ;
>          % a hack:
> maximum := maximum + max(xpart urcorner shape, ypart urcorner shape);
> minimum := minimum - max(xpart urcorner shape, ypart urcorner shape);
>
> a bit overkill but it seems to work
>
> Hans
>
> -----------------------------------------------------------------
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>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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