hyperion.ng/effects/waves.py

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import hyperion, time, math, random
randomCenter = bool(hyperion.args.get('random-center', False))
centerX = float(hyperion.args.get('center_x', -0.15))
centerY = float(hyperion.args.get('center_y', -0.25))
rotationTime = float(hyperion.args.get('rotation_time', 90))
colors = hyperion.args.get('colors', ((255,0,0),(255,255,0),(0,255,0),(0,255,255),(0,0,255),(255,0,255)))
reverse = bool(hyperion.args.get('reverse', False))
reverseTime = int(hyperion.args.get('reverse_time', 0))
positions = []
# calc center if random
if randomCenter:
centerX = random.uniform(0.0, 1.0)
centerY = random.uniform(0.0, 1.0)
rCenterX = int(round(float(hyperion.imageWidth())*centerX))
rCenterY = int(round(float(hyperion.imageHeight())*centerY))
#calc interval
sleepTime = max(1/(255/rotationTime), 0.016)
#calc diagonal
if centerX < 0.5:
cX = 1.0-centerX
else:
cX = 0.0+centerX
if centerY < 0.5:
cY = 1.0-centerY
else:
cY = 0.0+centerY
diag = int(round(math.hypot(cX*hyperion.imageWidth(),cY*hyperion.imageHeight())))
# some diagonal overhead
diag = int(diag*1.3)
# calc positions
pos = 0
step = int(255/len(colors))
for _ in colors:
positions.append(pos)
pos += step
# target time
targetTime = time.time()+float(reverseTime)
while not hyperion.abort():
# verify reverseTime, randomize reverseTime based on reverseTime up to reversedTime*2
if reverseTime >= 1:
now = time.time()
if now > targetTime:
reverse = not reverse
targetTime = time.time()+random.uniform(float(reverseTime), float(reverseTime*2.0))
# prepare bytearray with colors and positions
gradientBa = bytearray()
it = 0
for color in colors:
gradientBa += bytearray((positions[it],color[0],color[1],color[2]))
it += 1
hyperion.imageRadialGradient(rCenterX,rCenterY, diag, gradientBa,0)
# increment positions
for i, pos in enumerate(positions):
if reverse:
positions[i] = pos - 1 if pos >= 1 else 255
else:
positions[i] = pos + 1 if pos <= 254 else 0
hyperion.imageShow()
time.sleep(sleepTime)