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Index › Programming Questions & Help › Syntax Questions › some kind of masking
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some kind of masking (Read 715 times)
AndreiRT
some kind of masking
Aug 14th, 2005, 6:22am  
hello list,

is there any way to mask shapes beign drawn by Processing? For example, I want to draw lines randomly, and mask these lines, to make them form a determined shape.

bye,
andrei
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fry
Re: some kind of masking
Reply #1 - Aug 14th, 2005, 9:28pm  
nope, can't do it unfortunately. probably not until after 1.0.
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seltar
Re: some kind of masking
Reply #2 - Aug 17th, 2005, 9:36am  
Well, if i understand correctly, then this worked for me:

Code:

PImage m;

void setup()
{
  size(200,200);
  background(0);
  smooth();
  m = loadImage("mask.gif");
}

void draw()
{
  stroke(255,0,0);
  line(random(200),random(200),random(200),random(200));
  image(m,0,0);
}


Where mask.gif is filled white with a section cut out of it (transparent)
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fry
Re: some kind of masking
Reply #3 - Aug 17th, 2005, 3:42pm  
hm, i guess it depends on what you want to do. you can use an image as a mask or set a mask on that when drawing.. but there's no way to really mask a set of geometry.

so you might be able to do something like make a new PGraphics3, then draw lines into it, then call its mask() function to shape it using another image, then call image() to draw that PGraphics3 back to the drawing surface.. buuut that might be a bit much.
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