87 lines
3.4 KiB
Python
87 lines
3.4 KiB
Python
# The MIT License (MIT)
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#
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# Copyright (c) 2019-2020 Roy Hooper
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# Copyright (c) 2020 Kattni Rembor for Adafruit Industries
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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"""
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`adafruit_led_animation.animation.rainbowcomet`
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================================================================================
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TODO
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* Author(s): Roy Hooper, Kattni Rembor
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"""
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from adafruit_led_animation.animation.comet import Comet
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from adafruit_led_animation.color import colorwheel, BLACK
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class RainbowComet(Comet):
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"""
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A rainbow comet animation.
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:param pixel_object: The initialised LED object.
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:param float speed: Animation speed in seconds, e.g. ``0.1``.
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:param color: Animation color in ``(r, g, b)`` tuple, or ``0x000000`` hex format.
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:param int tail_length: The length of the comet. Defaults to 10. Cannot exceed the number of
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pixels present in the pixel object, e.g. if the strip is 30 pixels
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long, the ``tail_length`` cannot exceed 30 pixels.
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:param bool reverse: Animates the comet in the reverse order. Defaults to ``False``.
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:param bool bounce: Comet will bounce back and forth. Defaults to ``True``.
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:param int colorwheel_offset: Offset from start of colorwheel (0-255).
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"""
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# pylint: disable=too-many-arguments
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def __init__(
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self,
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pixel_object,
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speed,
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tail_length=10,
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reverse=False,
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bounce=False,
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colorwheel_offset=0,
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name=None,
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):
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self._colorwheel_is_tuple = isinstance(colorwheel(0), tuple)
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self._colorwheel_offset = colorwheel_offset
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super().__init__(pixel_object, speed, 0, tail_length, reverse, bounce, name)
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def _calc_brightness(self, n, color):
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brightness = (n * self._color_step) + self._color_offset
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if not self._colorwheel_is_tuple:
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color = (color & 0xFF, ((color & 0xFF00) >> 8), (color >> 16))
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return [int(i * brightness) for i in color]
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def __recompute_color(self, color):
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factor = int(256 / self._tail_length)
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self._comet_colors = [BLACK] + [
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self._calc_brightness(
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n,
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colorwheel(
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int((n * factor) + self._color_offset + self._colorwheel_offset)
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% 256
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),
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)
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for n in range(self._tail_length - 1)
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]
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self._reverse_comet_colors = list(reversed(self._comet_colors))
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self._computed_color = color
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