Using 'get()' with an ellispe

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Using 'get()' with an ellispe

in Programming Questions • 1 year ago

Hello everyone!

I need to use the get() function for one of my algorithms, but rather than the get (x,y,width,hight) - gets a rectangle - is there any way to use the get with an ellipse?

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jbum

Re: Using 'get()' with an ellispe

1 year ago

There are lots of ways to accomplish this. One method is to mask the image after you call get(). Create a second PGraphics that is all black except for a white circle. Then use that for your mask. Here's some sample code, showing the trick.

PImage img;
PGraphics msk;
void setup()
{
size(500,400);
smooth();
// create mask
msk = createGraphics(width, height, P2D);
msk.beginDraw();
msk.smooth();
msk.background(0);
msk.fill(255);
msk.ellipse(width/2,height/2,height*.9,height*.9);
msk.endDraw();
noLoop();
}
void draw() {
noStroke();
background(255);
for (int i = 0; i < 300; ++i) {
fill(random(256));
ellipse(random(width),random(height),20,20);
}
img = get();
img.mask(msk);
// draw reduced size copy of circular get...
image(img,0,0,width/2,height/2);
}

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