81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# SPDX-FileCopyrightText: 2020 Kattni Rembor for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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`adafruit_led_animation.animation.sparkle`
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================================================================================
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Sparkle animation 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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import random
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from adafruit_led_animation.animation import Animation
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__version__ = "0.0.0-auto.0"
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__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_LED_Animation.git"
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class Sparkle(Animation):
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"""
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Sparkle animation of a single color.
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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 num_sparkles: Number of sparkles to generate per animation cycle.
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"""
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# pylint: disable=too-many-arguments
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def __init__(self, pixel_object, speed, color, num_sparkles=1, name=None):
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if len(pixel_object) < 2:
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raise ValueError("Sparkle needs at least 2 pixels")
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self._half_color = color
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self._dim_color = color
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self._sparkle_color = color
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self._num_sparkles = num_sparkles
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self._num_pixels = len(pixel_object)
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self._pixels = []
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super().__init__(pixel_object, speed, color, name=name)
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def _set_color(self, color):
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half_color = tuple(color[rgb] // 4 for rgb in range(len(color)))
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dim_color = tuple(color[rgb] // 10 for rgb in range(len(color)))
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for pixel in range(len(self.pixel_object)):
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if self.pixel_object[pixel] == self._half_color:
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self.pixel_object[pixel] = half_color
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elif self.pixel_object[pixel] == self._dim_color:
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self.pixel_object[pixel] = dim_color
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self._half_color = half_color
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self._dim_color = dim_color
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self._sparkle_color = color
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def draw(self):
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self._pixels = [
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random.randint(0, (len(self.pixel_object) - 1))
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for _ in range(self._num_sparkles)
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]
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for pixel in self._pixels:
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self.pixel_object[pixel] = self._sparkle_color
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def after_draw(self):
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self.show()
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for pixel in self._pixels:
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self.pixel_object[pixel % self._num_pixels] = self._half_color
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self.pixel_object[(pixel + 1) % self._num_pixels] = self._dim_color
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