101 lines
3.7 KiB
Python
101 lines
3.7 KiB
Python
# The MIT License (MIT)
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#
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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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Rainbow comet for CircuitPython helper library for LED animations.
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* Author(s): Kattni Rembor
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Implementation Notes
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--------------------
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**Hardware:**
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* `Adafruit NeoPixels <https://www.adafruit.com/category/168>`_
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* `Adafruit DotStars <https://www.adafruit.com/category/885>`_
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**Software and Dependencies:**
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* Adafruit CircuitPython firmware for the supported boards:
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https://circuitpython.org/downloads
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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, calculate_intensity
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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 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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:param int step: Colorwheel step (defaults to automatic).
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:param bool ring: Ring mode. Defaults to ``False``.
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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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step=0,
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name=None,
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ring=False,
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):
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if step == 0:
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self._colorwheel_step = int(256 / tail_length)
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else:
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self._colorwheel_step = step
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self._colorwheel_offset = colorwheel_offset
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super().__init__(
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pixel_object, speed, 0, tail_length, reverse, bounce, name, ring
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)
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def _set_color(self, color):
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self._comet_colors = [BLACK]
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for n in range(self._tail_length):
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invert = self._tail_length - n - 1
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self._comet_colors.append(
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calculate_intensity(
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colorwheel(
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int((invert * self._colorwheel_step) + self._colorwheel_offset)
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% 256
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),
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n * self._color_step + 0.05,
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)
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)
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self._computed_color = color
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