Math

• PVector

Calculation

• constrain()
• dist()
• lerp()
• mag()
• map()
• norm()
• sq()

Trigonometry

• degrees()
• radians()

Random

• noise()
• noiseDetail()
• noiseSeed()
• random()
• randomSeed()

Example

from processing import *

xoff = 0.0
width = 400
height = 300

def setup():
    size(400, 400)

def draw():
    global xoff
    background(204)
    xoff = xoff + .01
    n = noise(xoff) * width
    line(n, 0, n, height)

run()

Reference

• Processing.org
• Processing noise function