110 lines
4.3 KiB
Python
110 lines
4.3 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.sparklepluse`
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================================================================================
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Sparklepulse animation for CircuitPython helper library for LED animations.
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* Author(s): Roy Hooper, dmolavi
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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 import NANOS_PER_SECOND, monotonic_ns
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from adafruit_led_animation.animation import Animation
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class SparklePulse(Animation):
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"""
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Combination of the Spark and Pulse animations.
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:param pixel_object: The initialised LED object.
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:param int speed: Animation refresh rate 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 period: Period to pulse the LEDs over. Default 5.
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:param max_intensity: The maximum intensity to pulse, between 0 and 1.0. Default 1.
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:param min_intensity: The minimum intensity to pulse, between 0 and 1.0. Default 0.
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"""
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# pylint: disable=too-many-arguments
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def __init__(
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self, pixel_object, speed, color, period=5, max_intensity=1, min_intensity=0
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):
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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.max_intensity = max_intensity
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self.min_intensity = min_intensity
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self._period = period
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self._intensity_delta = max_intensity - min_intensity
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self._half_period = period / 2
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self._position_factor = 1 / self._half_period
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self._bpp = len(pixel_object[0])
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self._last_update = monotonic_ns()
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self._cycle_position = 0
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self._half_color = None
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self._dim_color = None
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super().__init__(pixel_object, speed, color)
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def _recompute_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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def draw(self):
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pixel = random.randint(0, (len(self.pixel_object) - 2))
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now = monotonic_ns()
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time_since_last_draw = (now - self._last_update) / NANOS_PER_SECOND
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self._last_update = now
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pos = self._cycle_position = (
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self._cycle_position + time_since_last_draw
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) % self._period
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if pos > self._half_period:
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pos = self._period - pos
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intensity = self.min_intensity + (
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pos * self._intensity_delta * self._position_factor
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)
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color = [int(self.color[n] * intensity) for n in range(self._bpp)]
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self.pixel_object[pixel] = color
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self.show()
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