hyperion.ng/effects/candle.py

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# Candleflicker effect by penfold42
# Algorithm courtesy of
# https://cpldcpu.com/2013/12/08/hacking-a-candleflicker-led/
# candles can be :
# a single led number, a list of candle numbers
# "all" to flicker all the leds randomly
# "all-together" to flicker all the leds in unison
import hyperion
import time
import colorsys
import random
# Get parameters
color = hyperion.args.get('color', (255,138,0))
colorShift = float(hyperion.args.get('colorShift', 1))/100.0
brightness = float(hyperion.args.get('brightness', 100))/100.0
sleepTime = float(hyperion.args.get('sleepTime', 0.14))
candles = hyperion.args.get('candles', "all")
ledlist = hyperion.args.get('ledlist', "1")
candlelist = ()
if (candles == "list") and (type(ledlist) is str):
for s in ledlist.split(','):
i = int(s)
if (i<hyperion.ledCount):
candlelist += (i,)
elif (candles == "list") and (type(ledlist) is list):
for s in (ledlist):
i = int(s)
if (i<hyperion.ledCount):
candlelist += (i,)
else:
candlelist = range(hyperion.ledCount)
# Convert rgb color to hsv
hsv = colorsys.rgb_to_hsv(color[0]/255.0, color[1]/255.0, color [2]/255.0)
def CandleRgb():
hue = random.uniform(hsv[0]-colorShift, hsv[0]+colorShift) % 1.0
RAND=random.randint(0,15)
while ((RAND & 0x0c)==0):
RAND=random.randint(0,15)
val = ( min(RAND, 15)/15.0001 ) * brightness
frgb = colorsys.hsv_to_rgb(hue, hsv[1], val);
return (int(255*frgb[0]), int(255*frgb[1]), int(255*frgb[2]))
ledData = bytearray(hyperion.ledCount * (0,0,0) )
while not hyperion.abort():
if (candles == "all-together"):
rgb = CandleRgb()
for lednum in candlelist:
ledData[3*lednum+0] = rgb[0]
ledData[3*lednum+1] = rgb[1]
ledData[3*lednum+2] = rgb[2]
elif (candles == "all"):
for lednum in candlelist:
rgb = CandleRgb()
ledData[3*lednum+0] = rgb[0]
ledData[3*lednum+1] = rgb[1]
ledData[3*lednum+2] = rgb[2]
else:
for lednum in candlelist:
rgb = CandleRgb()
ledData[3*lednum+0] = rgb[0]
ledData[3*lednum+1] = rgb[1]
ledData[3*lednum+2] = rgb[2]
hyperion.setColor (ledData)
time.sleep(sleepTime)