from bibliopixel.animation.strip import Strip
import math
# This one is best run in the region of 50 frames a second
[docs]class HalvesRainbow(Strip):
def __init__(self, layout, max_led=-1, centre_out=True, rainbow_inc=4,
**kwds):
super().__init__(layout, 0, -1, **kwds)
self._minLed = 0
self._maxLed = max_led
if self._maxLed < 0 or self._maxLed < self._minLed:
self._maxLed = self.layout.numLEDs - 1
self._positive = True
self._step = 0
self._centerOut = centre_out
self._rainbowInc = rainbow_inc
[docs] def pre_run(self):
self._current = 0
self._step = 0
[docs] def step(self, amt=1):
center = float(self._maxLed) / 2
center_floor = math.floor(center)
center_ceil = math.ceil(center)
if self._centerOut:
self.layout.fill(
self.palette(self._step), int(center_floor - self._current), int(center_floor - self._current))
self.layout.fill(
self.palette(self._step), int(center_ceil + self._current), int(center_ceil + self._current))
else:
self.layout.fill(
self.palette(self._step), int(self._current), int(self._current))
self.layout.fill(
self.palette(self._step), int(self._maxLed - self._current), int(self._maxLed - self._current))
self._step += amt + self._rainbowInc
if self._current == center_floor:
self._current = self._minLed
else:
self._current += amt