Re: Draw a line with Metafun

[Hans Hagen <pragma@wxs.nl>]

Jessica Holle wrote:

>Hi,
>
>I want to draw a line myself with Metafun.
>This line should looks like in the module pre-05.
>
>I've copied a few lines and try to understand what there happend.
>But it failed. I've also read in the metafun.pdf, but it ist very
>hard to understand.
>
>I don't see the context between the numbers of x ond y. When I
>change the numbers the output varies but in no relation to the
>numbers.
>
>Can anyone help to explain this to me or has another documentation?
>
>so looks my test:
>
>\setupoutput[pdftex]
>\setupcolors[state=start]
>\definecolor[back2][r=.6,g=.7,b=.8]
>\definecolor[back][s=.95]
>\starttext
>\startMPinclusions
>def random_hash_frame (expr width, height, offset, linewidth ) =
>def delta = ((uniformdeviate .5offset) + .25offset) enddef ;
>x1 := 0.5cm ; y1 :=0.5cm ; x2 := 16cm ; y2 := 3cm ;
>drawoptions(withpen pencircle scaled linewidth withcolor
>\MPcolor{back2}) ;
>fill z1--(x2,y1)--z2--(x1,y2)--cycle ;
>enddef;
>\stopMPinclusions
>\startuseMPgraphic{jessi}
>random_hash_frame(height,width, 0.5cm,0.5cm)
>  
>
                                        10cm,5cm

or whatever, you need to provide some known measures

>\stopuseMPgraphic
>\useMPgraphic{jessi}
>\stoptext
>  
>
think of z1 being equivalent to (x1,y1) 

Hans 

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                                          Hans Hagen | PRAGMA ADE
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