hyperion.ng/effects/snake.py

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import hyperion
import time
import colorsys
# Get the parameters
rotationTime = float(hyperion.args.get('rotation-time', 10.0))
color = hyperion.args.get('color', (255,0,0))
backgroundColor = hyperion.args.get('background-color', (0,0,0))
percentage = int(hyperion.args.get('percentage', 10))
# Check parameters
rotationTime = max(0.1, rotationTime)
percentage = max(1, min(percentage, 100))
# Process parameters
factor = percentage/100.0
# Initialize the led data
snakeLeds = max(1, int(hyperion.ledCount*factor))
ledData = bytearray()
color_hsv = colorsys.rgb_to_hsv(color[0]/255.0,color[1]/255.0,color[2]/255.0)
backgroundColor_hsv = colorsys.rgb_to_hsv(backgroundColor[0]/255.0,backgroundColor[1]/255.0,backgroundColor[2]/255.0)
for i in range(hyperion.ledCount-snakeLeds):
ledData += bytearray((int(backgroundColor[0]), int(backgroundColor[1]), int(backgroundColor[2])))
def lerp(a, b, t):
return (a[0]*(1-t)+b[0]*t, a[1]*(1-t)+b[1]*t, a[2]*(1-t)+b[2]*t)
for i in range(0, snakeLeds):
hsv = lerp(color_hsv, backgroundColor_hsv, 1.0/(snakeLeds-1)*i)
rgb = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2])
ledData += bytearray((int(rgb[0]*255), int(rgb[1]*255), int(rgb[2]*255)))
# Calculate the sleep time and rotation increment
increment = 3
sleepTime = rotationTime / hyperion.ledCount
while sleepTime < 0.05:
increment *= 2
sleepTime *= 2
increment %= hyperion.ledCount
# Start the write data loop
while not hyperion.abort():
hyperion.setColor(ledData)
ledData = ledData[increment:] + ledData[:increment]
time.sleep(sleepTime)