🚀 go-pugleaf

In <cWm8qMy00Xc8sPk0iw@andrew.cmu.edu>, sg1q+@andrew.cmu.edu (Simon Peter
Gatrall) writes:
>
> I've been interested in playing with the procedures PostScript uses to do
> halftoning, and I was wondering if anyone else is familiar with this stuff. 
> One thing that bothers me is that once a pattern is made to represent a
> specific gray value, it isn't recomputed.  This makes all the sense in the
> world for line and dot screens, but what if you want something that looks
> like a texture?

Here, here!  The following code will generate a random-patterned grey scale
with the probability of any pixel being white being proportional to the grey
level:

	1 45 { pop pop rand 1073741824 div 1 sub } setscreen

The problem is that when you use this, the maximum area that gets patterned
is 0.1" x 0.1", and THAT pattern is replicated over the whole area being
painted.  CAN halftoning be used to randomly pattern the entire area being
painted?

Yours, etc., Tony Olekshy (<smart>!alberta!oha!tony, +1 403 425 9657).