Displays a series of trigonometric patterns on the Pimoroni Unicorn HAT

trig.py

#!/usr/bin/env python

import unicornhat as unicorn
import time, colorsys
import math

unicorn.brightness(0.5)

def compute_z(x, y, t, pattern):
	x = x + t
	y = y + t
	if pattern == 'parallel':
		z = math.sin(x) + math.cos(x)
	elif pattern == 'diagonal':
		z = math.sin(x + y) + math.cos(x + y)
	elif pattern == 'crisscross':
		z = math.sin(x) + math.cos(y)
	z = (z + 2) / 4
	return z

patterns = ['parallel', 'diagonal', 'crisscross']

while True:
	for pattern in patterns:
		for t in range(100):
			for y in range(8):
				for x in range(8):
					h = 0.1
					s = 1.0
					v = compute_z(x, y, t, pattern)
					rgb = colorsys.hsv_to_rgb(h, s, v)
					r = int(rgb[0]*255.0)
					g = int(rgb[1]*255.0)
					b = int(rgb[2]*255.0)
					unicorn.set_pixel(x, y, r, g, b)
			unicorn.show()
			time.sleep(0.05)