justvanrossum

# Physics stolen from:
# http://giphy.com/gifs/wave-circle-point-13ePqdDflwat9e

def blobPos(pt, r, a):
    x, y = pt
    x += cos(a) * r
    y += sin(a) * r
    return (x, y)

def drawGrid(cells):

justvanrossum

# http://dailydrawbot.tumblr.com/post/141565208389/oscilloscope-lissajous

canvasSize = 500
nFrames = 20
nSteps = 20
radius = 195
nEchoes = 20
nScopeLines = 10
xFrequency = 3
yFrequency = 4

justvanrossum

# nCirclesH = 18; nCirclesV = 6:
#   http://dailydrawbot.tumblr.com/post/138985675364/psychodonut-2
# nCirclesH = 38; nCirclesV = 28:
#   http://dailydrawbot.tumblr.com/post/139047595845/psychodonut-3

def project(x, y, innerR, outerR, phase):
    # convert from "donut space" to normal space
    angle = 2 * pi * x
    f = (cos(phase + pi * y) + 1) / 2
    R = innerR + f * (outerR - innerR)

justvanrossum

# A moving tribute to Ellsworth Kelly's "Seine" (1951).

from random import seed  # seed() allows us to get repeatable pseudo-noise

def expandGrid(pixels):
    assert len(pixels) % 2
    mid = len(pixels) // 2
    midColumn = pixels[mid]
    pixels.insert(mid + 1, list(midColumn))
    pixels.insert(mid + 0, list(midColumn))