84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
# SPDX-FileCopyrightText: 2020 Kattni Rembor for Adafruit Industries
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
"""
|
|
`adafruit_led_animation.animation.rainbowcomet`
|
|
================================================================================
|
|
|
|
Rainbow comet for CircuitPython helper library for LED animations.
|
|
|
|
* Author(s): Kattni Rembor
|
|
|
|
Implementation Notes
|
|
--------------------
|
|
|
|
**Hardware:**
|
|
|
|
* `Adafruit NeoPixels <https://www.adafruit.com/category/168>`_
|
|
* `Adafruit DotStars <https://www.adafruit.com/category/885>`_
|
|
|
|
**Software and Dependencies:**
|
|
|
|
* Adafruit CircuitPython firmware for the supported boards:
|
|
https://circuitpython.org/downloads
|
|
|
|
|
|
"""
|
|
|
|
from adafruit_led_animation.animation.comet import Comet
|
|
from adafruit_led_animation.color import colorwheel, BLACK, calculate_intensity
|
|
|
|
|
|
class RainbowComet(Comet):
|
|
"""
|
|
A rainbow comet animation.
|
|
|
|
:param pixel_object: The initialised LED object.
|
|
:param float speed: Animation speed in seconds, e.g. ``0.1``.
|
|
:param int tail_length: The length of the comet. Defaults to 10. Cannot exceed the number of
|
|
pixels present in the pixel object, e.g. if the strip is 30 pixels
|
|
long, the ``tail_length`` cannot exceed 30 pixels.
|
|
:param bool reverse: Animates the comet in the reverse order. Defaults to ``False``.
|
|
:param bool bounce: Comet will bounce back and forth. Defaults to ``True``.
|
|
:param int colorwheel_offset: Offset from start of colorwheel (0-255).
|
|
:param int step: Colorwheel step (defaults to automatic).
|
|
:param bool ring: Ring mode. Defaults to ``False``.
|
|
"""
|
|
|
|
# pylint: disable=too-many-arguments
|
|
def __init__(
|
|
self,
|
|
pixel_object,
|
|
speed,
|
|
tail_length=10,
|
|
reverse=False,
|
|
bounce=False,
|
|
colorwheel_offset=0,
|
|
step=0,
|
|
name=None,
|
|
ring=False,
|
|
):
|
|
if step == 0:
|
|
self._colorwheel_step = int(256 / tail_length)
|
|
else:
|
|
self._colorwheel_step = step
|
|
self._colorwheel_offset = colorwheel_offset
|
|
super().__init__(
|
|
pixel_object, speed, 0, tail_length, reverse, bounce, name, ring
|
|
)
|
|
|
|
def _set_color(self, color):
|
|
self._comet_colors = [BLACK]
|
|
for n in range(self._tail_length):
|
|
invert = self._tail_length - n - 1
|
|
self._comet_colors.append(
|
|
calculate_intensity(
|
|
colorwheel(
|
|
int((invert * self._colorwheel_step) + self._colorwheel_offset)
|
|
% 256
|
|
),
|
|
n * self._color_step + 0.05,
|
|
)
|
|
)
|
|
self._computed_color = color
|