https://gist.github.com/96faf148a678808aa79b

Demo of a spining cube that is shaded based off of a light source

Comes with a triangle function which allows you to draw shaded in triangles using pythonistas line draw function

Code is free to use/reuse

Small edit makes it scale to whatever screensize it's on:

<code>
#https://gist.github.com/omz/4034439
#TODO: Clear (and random, play/pause?) buttons

from scene import *
from sound import play_effect, set_volume, load_effect
from colorsys import hsv_to_rgb
import pickle

class DrumMachine (Scene):
def setup(self):
self.beat = 0.0
set_volume(1.0)

	self.sounds = ['Drums_01', 'Drums_02', 'Drums_03', 'Drums_06',
	               'Drums_10', 'Drums_11', 'Drums_11', 'Drums_15']
	for effect in self.sounds:
		load_effect(effect)
		
	try:
		with open('Drums.data', 'r') as f:
			self.grid = pickle.load(f)
	except EOFError:
		self.grid = [[False for col in xrange(16)] for row in xrange(8)]
	
def draw(self):
	background(0, 0, 0)
	last_beat = int(self.beat)
	self.beat += 1.0/7.5
	self.beat %= 16
	play = int(self.beat) != last_beat
	for y in xrange(16):
		beat_row = int(self.beat) == y
		for x in xrange(8):
			if self.grid[x][y]:
				h = x / 8.0
				r, g, b = hsv_to_rgb(h, 1, 1)
				if play and int(self.beat) == y:
					play_effect(self.sounds[x])
				if beat_row:
					h = x / 8.0
					r, g, b = hsv_to_rgb(h, 1, 1)
					fill(r, g, b)
				else:
					r, g, b = hsv_to_rgb(h, 1, 0.5)
					fill(r, g, b)
			elif beat_row:
				fill(1, 1, 1)
			else:
				fill(0.50, 0.50, 0.50)
			rect(x*(self.bounds.w/4), y*(self.bounds.h/9), self.bounds.w/4, self.bounds.h/9)
			#rect(x * 96, y * 61, 95, 60)

def touch_began(self, touch):
	x, y = touch.location.as_tuple()
	x = int(x / 96)
	y = int(y / 61)
	if y < 16:
		self.grid[x][y] = not self.grid[x][y]

def stop(self):
	with open('Drums.data', 'w') as f:
		pickle.dump(self.grid, f)

run(DrumMachine(), PORTRAIT)
</code>