by Daniel Shiffman. Mouse horizontal location controls size of dots. Creates a simple pointillist effect using ellipses colored according to pixels in an image.
Original Processing.org Example: Pointillism
// All Examples Written by Casey Reas and Ben Fry // unless otherwise stated. // @pjs preload must be used to preload the image so that it will be available when used in the sketch /* @pjs preload="data/eames.jpg"; */ PImage a; void setup() { a = loadImage("data/eames.jpg"); size(200,200); noStroke(); background(255); smooth(); } void draw() { float pointillize = map(mouseX, 0, width, 2, 18); int x = int(random(a.width)); int y = int(random(a.height)); color pix = a.get(x, y); fill(pix, 126); ellipse(x, y, pointillize, pointillize); }