public void setup() {
size(500, 500);
background(255);
smooth();
convexHull = new ConvexHull(this);
convexHull.showDebugPoints = true;
convexHull.addPoint(new PVector(random(width), random(height)));
convexHull.addPoint(new PVector(random(width), random(height)));
convexHull.addPoint(new PVector(random(width), random(height)));
}