justvanrossum’s gists

justvanrossum / SquareVsLozenge.py

Created May 3, 2016 19:07

DrawBot: Create a simple animation with a grid of rotating squares.

	# http://dailydrawbot.tumblr.com/post/143801148619/square-vs-lozenge

	def rotatedSquare(x, y, squareSize, angle):
	offsetSin = squareSize * sin(radians(angle))
	save()
	translate(x + offsetSin, 0)
	rotate(angle)
	rect(0, 0, squareSize, squareSize)
	restore()

justvanrossum / GrowingCircles.py

Created September 23, 2016 15:37

DrawBot: Generate a progress-spinner-like animation with growing circles.

	# Result:
	# http://dailydrawbot.tumblr.com/post/150807743869/growing-circles

	def circle(pt, radius):
	diameter = 2 * radius
	x, y = pt
	oval(x - radius, y - radius, diameter, diameter)

	nFrames = 50
	canvasSize = 500

justvanrossum / LissajousGrid.py

Last active April 29, 2020 16:51

DrawBot: create a grid of Lissajous curve variations.

	# http://dailydrawbot.tumblr.com/post/160078796339/lissajous-grid
	# remade from https://twitter.com/fermatslibrary/status/857580490425020416

	def lissajous(a, b, phase, radius):
	numSteps = 340
	points = []
	for i in range(numSteps):
	angle = 2 * pi * i / numSteps
	x = radius * sin(a * angle + phase)
	y = -radius * sin(b * angle)

justvanrossum / SierpinskiSquare.py

Last active December 13, 2017 17:40

DrawBot: infinite zoom into a Sierpinski Square (takes a while to render!)

	# Slightly modified from
	# https://twitter.com/petrvanblokland/status/860610270410018817
	# by Petr van Blokland @petrvanblokland

	def drawSierpinskiSquare(px, py, w, maxW, maxH):
	if w < 1:
	return
	for x in range(3):
	for y in range(3):
	if x == 1 and y == 1:

justvanrossum / Ellipses.py

Last active October 4, 2020 23:36

DrawBot: create a simple loop of nested ellipses

	# Result:
	# http://dailydrawbot.tumblr.com/post/160364438359/ellipses

	def drawEllipses(cx, cy, rx, ry, dx, dy, n, bw=0):
	for i in range(n):
	fill(bw)
	oval(cx - rx, cy - ry, 2 * rx, 2 * ry)
	rx -= dx
	ry -= dy
	bw = 1 - bw

justvanrossum / NestedBoxes.py

Last active August 6, 2019 15:14

DrawBot: create a simple animation with moving squares

	# http://dailydrawbot.tumblr.com/post/163234641179/nested-boxes

	def easeInOutQuad(t):
	t *= 2
	if t < 1:
	return 0.5 * (t ** 2)
	else:
	t = 2 - t
	return 1 - 0.5 * (t ** 2)

justvanrossum / screen_info.py

Created June 6, 2019 06:30

macOS/Python: Get dimension info about active screens

	from AppKit import NSScreen, NSDeviceSize, NSDeviceResolution
	from Quartz import CGDisplayScreenSize

	for i, screen in enumerate(NSScreen.screens(), 1):
	description = screen.deviceDescription()
	pw, ph = description[NSDeviceSize].sizeValue()
	rx, ry = description[NSDeviceResolution].sizeValue()
	mmw, mmh = CGDisplayScreenSize(description["NSScreenNumber"])
	scaleFactor = screen.backingScaleFactor()
	pw *= scaleFactor

justvanrossum / PaulBrownPattern.py

Last active March 11, 2020 21:19

DrawBot script to recreate 'Untitled Computer Assisted Drawing' by Paul Brown from 1975

	# Original:
	# Paul Brown, 'Untitled Computer Assisted Drawing' (1975)
	# The program was written in Fortran and drawn with Calcomp's drum pen plotter.
	# https://twitter.com/satoshi_aizawa/status/1218786881631965186

	def drawArc(center, radius, startAngle, endAngle):
	bez = BezierPath()
	bez.arc(center, radius, startAngle, endAngle, False)
	drawPath(bez)

justvanrossum / generateOTTagsModule.py

Last active August 20, 2020 08:50

Scrape OT tag definitions and descriptions from OT spec site (script, language and feature tags)

	import os
	import re


	def parse(data):
	start = data.find("<tbody>")
	end = data.find("</tbody>")
	data = data[start+7:end]
	for chunk in re.findall(r"<tr>.+?</tr>", data, re.DOTALL):
	fields = re.findall(r"<td>(.+?)</td>", chunk, re.DOTALL)

justvanrossum / animated_color_grid.py

Created April 5, 2020 18:23

Animated Color Grid with DrawBot

	canvasSize = 500
	numSquares = 25
	squareSize = canvasSize / numSquares

	numFrames = 50

	for frame in range(numFrames):
	t = frame / numFrames
	newPage(canvasSize, canvasSize)
	frameDuration(1/25)

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