This example is for Processing 3+. If you have a previous version, use the examples included with your software. If you see any errors or have suggestions, please let us know.
Pulses.
Software drawing instruments can follow a rhythm or abide by rules independent of drawn gestures. This is a form of collaborative drawing in which the draftsperson controls some aspects of the image and the software controls others.
int angle = 0; void setup() { size(640, 360); background(102); noStroke(); fill(0, 102); } void draw() { // Draw only when mouse is pressed if (mousePressed == true) { angle += 5; float val = cos(radians(angle)) * 12.0; for (int a = 0; a < 360; a += 75) { float xoff = cos(radians(a)) * val; float yoff = sin(radians(a)) * val; fill(0); ellipse(mouseX + xoff, mouseY + yoff, val, val); } fill(255); ellipse(mouseX, mouseY, 2, 2); } }