Constrain()

informer91

How do you use the constrain() function to constrain in circle shape instead of rect?

MenteCode

Do note, that by using constrain() within a circle, your just making it harder. The best way to constrain something in a circle would be to use PVector. Here is an example:

int mouseDiam = 30;
int circleDiam = 200;

void setup() {
  size(500, 500);
}

void draw() {
  background(200);
  PVector dist = new PVector(mouseX, mouseY);
  PVector origin = new PVector(width/2, height/2);
  dist.sub(origin);
  dist.limit(circleDiam/2 - mouseDiam/2);
  translate(width/2, height/2);
  ellipseMode(CENTER);
  ellipse(0, 0, circleDiam, circleDiam);
  ellipse(dist.x, dist.y, mouseDiam, mouseDiam);
}

It is a mouthful, but this is one of the easiest ways to "constrain" a point in a circle.

-- MenteCode