Random position in a specific area

General Discussion Other

jimmyvuw

Random position in a specific area

in General Discussion • Other • 1 year ago

I got a picture in black and white. And my question is how can I randomly put some circles or shapes on the black area only. Please help. I'm very new to processing.

Replies(4)

tfguy44

Re: RANDOM POSITION IN A SPECIFIC AREA

1 year ago

Do you want to limit the circles so they only cover black pixels, or do you only want to randomly place circles on black areas?

The former is hard. The latter is easy:

PImage img = loadImage( "http://ecx.images-amazon.com/images/I/31oBZMlxIYL._SX342_.jpg" );
void setup(){
size( img.width, img.height );
image(img, 0, 0);
filter( THRESHOLD, 0.9);
ellipseMode(CENTER);
}
void draw(){
fill( random(255), random(255), random(255) );
noStroke();
int x = int(random(width));
int y = int(random(height));
if( get(x,y) == color(0) ){
ellipse( x, y, 5, 5);
}
}

jimmyvuw

Re: RANDOM POSITION IN A SPECIFIC AREA

1 year ago

Tried it out and that's really what I need... Once again, thank you!

PhiLho

Re: Random position in a specific area

1 year ago

Avoid all caps subjects. As you can see in the forum, nobody else is doing it, and this make you look like you are shouting to attract attention...
I changed your subjects to lower case.

jimmyvuw

Re: Random position in a specific area

1 year ago

sorry, this is my first day! I won't do it next time.

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