hyperion.ng/effects/trails.py

import hyperion
import time
import colorsys
import random

min_len = int(hyperion.args.get('min_len', 3))
max_len = int(hyperion.args.get('max_len', 3))
#iHeight = int(hyperion.args.get('iHeight', 8))
trails = int(hyperion.args.get('int', 8))
sleepTime = float(hyperion.args.get('speed', 1)) / 1000.0
color = list(hyperion.args.get('color', (255,255,255)))
randomise = bool(hyperion.args.get('random', False))
iWidth = hyperion.imageWidth()
iHeight = hyperion.imageHeight()

class trail:
	def __init__(self):
		return

	def start(self, x, y, step, color, _len, _h):
		self.pos = 0.0
		self.step = step
		self.h = _h
		self.x = x
		self.data = []
		brigtness = color[2]
		step_brigtness = color[2] / _len
		for i in range(0, _len):
			rgb = colorsys.hsv_to_rgb(color[0], color[1], brigtness)
			self.data.insert(0, (int(255*rgb[0]), int(255*rgb[1]), int(255*rgb[2])))
			brigtness -= step_brigtness

		self.data.extend([(0,0,0)]*(_h-y))
		if len(self.data) < _h:
			for i in range (_h-len(self.data)):
				self.data.insert(0, (0,0,0))

	def getdata(self):
		self.pos += self.step
		if self.pos >  1.0:
			self.pos = 0.0
			self.data.pop()
			self.data.insert(0, (0,0,0))
		return self.x, self.data[-self.h:], all(x ==  self.data[0] for x in self.data)

tr = []

for unused in range(trails):
	r = {'exec': trail()}

	if randomise:
		col = (random.uniform(0.0, 1.0),1,1)
	else:
		col = colorsys.rgb_to_hsv(color[0]/255.0, color[1]/255.0, color[2]/255.0)

	r['exec'].start(
		random.randint(0, iWidth),
		random.randint(0, iHeight),
		random.uniform(0.2, 0.8),
		col,
		random.randint(min_len, max_len),
		iHeight
	)
	tr.append(r)

# Start the write data loop
while not hyperion.abort():
	ledData = bytearray()

	for r in tr:
		r['x'], r['data'], c = r['exec'].getdata()
		if c:
			if randomise:
				col = (random.uniform(0.0, 1.0),1,1)
			else:
				col = colorsys.rgb_to_hsv(color[0]/255.0, color[1]/255.0, color[2]/255.0)

			r['exec'].start(
				random.randint(0, iWidth),
				random.randint(0, iHeight),
				random.uniform(0.2, 0.8),
				col,
				random.randint(min_len, max_len),
				iHeight
			)

	for y in range(0, iHeight):
		for x in range(0, iWidth):
			for r in tr:
				if x == r['x']:
					led = bytearray(r['data'][y])
					break
				led = bytearray((0,0,0))
			ledData += led

	hyperion.setImage(iWidth,iHeight,ledData)
	time.sleep(sleepTime)