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""" |
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* PyDMXControl: A Python 3 module to control DMX using OpenDMX or uDMX. |
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* Featuring fixture profiles, built-in effects and a web control panel. |
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* <https://github.com/MattIPv4/PyDMXControl/> |
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* Copyright (C) 2022 Matt Cowley (MattIPv4) ([email protected]) |
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""" |
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from math import ceil, floor |
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from ..defaults import Effect |
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from ... import Colors |
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from ...utils.exceptions import MissingArgumentException, InvalidArgumentException |
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class Chase(Effect): |
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def __init__(self, *args, **kwargs): |
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if 'colors' not in kwargs: |
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raise MissingArgumentException('colors', True) |
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self.__colors = kwargs['colors'].copy() |
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del kwargs['colors'] |
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self.__length = len(self.__colors) |
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if self.__length < 2: |
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raise InvalidArgumentException('callback', 'Must contain two or more colors', True) |
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self.__snap = False |
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if 'snap' in kwargs and isinstance(kwargs['snap'], bool): |
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self.__snap = kwargs['snap'] |
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if 'snap' in kwargs: |
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del kwargs['snap'] |
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super().__init__(*args, **kwargs) |
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# Start of loop |
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self.__start = None |
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def callback(self): |
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# New |
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if self.__start is None: |
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self.__start = self.fixture.controller.ticker.millis_now() |
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offset = (self.speed / self.__length) * self.offset # Calculate offset duration |
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start = self.__start + offset # Account for initial offset |
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since_start = self.fixture.controller.ticker.millis_now() - start # Calculate time since effect started |
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since_last = since_start % self.speed # Calculate time since this loop started |
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# Get progress through this loop (excl delay) |
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progress = since_last / self.speed |
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# Ensure in range 0 <= p <= 1 |
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while progress > 1: |
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progress = progress - 1 |
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while progress < 0: |
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progress = 1 + progress |
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# Convert to color index |
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progress_index = self.__length * progress |
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next_i = ceil(progress_index) - 1 |
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previous_i = floor(progress_index) - 1 |
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percent = 1 - (progress_index - 1 - previous_i) |
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# Hit 0% & 100% |
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if percent >= 0.99: |
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percent = 1 |
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if percent <= 0.01: |
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percent = 0 |
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# Snapping |
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if self.__snap: |
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if percent <= 0.5: |
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percent = 0 |
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else: |
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percent = 1 |
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# Generate color |
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color = Colors.mix(self.__colors[previous_i], self.__colors[next_i], percent) |
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# Apply color |
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self.fixture.color(color, 0) |
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def start(self): |
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self.__start = None |
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super().start() |
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MattIPv4 /
PyDMXControl
