hyperion.ng/effects/fade.py

import hyperion, time

# Get the parameters
fadeInTime     = float(hyperion.args.get('fade-in-time', 2000)) / 1000.0
fadeOutTime    = float(hyperion.args.get('fade-out-time', 2000)) / 1000.0
colorStart     = hyperion.args.get('color-start', (255,174,11))
colorEnd       = hyperion.args.get('color-end', (0,0,0))
colorStartTime = float(hyperion.args.get('color-start-time', 1000)) / 1000
colorEndTime   = float(hyperion.args.get('color-end-time', 1000)) / 1000
repeat         = hyperion.args.get('repeat-count', 0)
maintainEndCol = hyperion.args.get('maintain-end-color', True)
minStepTime    = 0.03
currentR = currentG = currentB = 0

# create color table for fading from start to end color
color_step = (
	(colorEnd[0] - colorStart[0]) / 256.0,
	(colorEnd[1] - colorStart[1]) / 256.0,
	(colorEnd[2] - colorStart[2]) / 256.0
)

calcChannel = lambda i: min(max(int(colorStart[i] + color_step[i]*step),0),255)
colors = []
for step in range(256):
	colors.append( (calcChannel(0),calcChannel(1),calcChannel(2)) )

# calculate timings
if fadeInTime>0:
	incrementIn  = max(1,int(round(256.0 / (fadeInTime / minStepTime) )))
	sleepTimeIn  = fadeInTime / (256.0 / incrementIn)
else:
	incrementIn  = sleepTimeIn  = 1
	
if fadeOutTime>0:
	incrementOut = max(1,int(round(256.0 / (fadeOutTime / minStepTime) )))
	sleepTimeOut = fadeOutTime / (256.0 / incrementOut)
else:
	incrementOut  = sleepTimeOut  = 1

def setColor(r,g,b):
	global currentR,currentG,currentB
	
	currentR = r
	currentG = g
	currentB = b
	hyperion.setColor(r,g,b)

# loop
repeatCounter = 1
while not hyperion.abort():
	# fade in
	if fadeInTime > 0:
		for step in range(0,256,incrementIn):
			if hyperion.abort(): break
			setColor( colors[step][0],colors[step][1],colors[step][2] )
			time.sleep(sleepTimeIn)

	# end color
	t = 0.0
	while t<colorStartTime and not hyperion.abort():
		setColor( colors[255][0],colors[255][1],colors[255][2] )
		time.sleep(0.01)
		t += 0.01

	# fade out
	if fadeOutTime > 0:
		for step in range(255,-1,-incrementOut):
			if hyperion.abort(): break
			hyperion.setColor( colors[step][0],colors[step][1],colors[step][2] )
			time.sleep(sleepTimeOut)

	# start color
	t = 0.0
	while t<colorEndTime and not hyperion.abort():
		setColor( colors[0][0],colors[0][1],colors[0][2] )
		time.sleep(0.01)
		t += 0.01

	# repeat
	if repeat > 0 and repeatCounter >= repeat : break
	repeatCounter += 1

time.sleep(0.5)
# maintain end color until effect end
while not hyperion.abort() and maintainEndCol:
	hyperion.setColor( currentR, currentG, currentB )
	time.sleep(1)