f4da9564d4
- AnimationBase ABC with render(t, led_count) and from_params() contract - SolidColorAnimation: time-independent uniform fill - ChaseAnimation: moving lit segment with forward/reverse support - PulseAnimation: sine-wave breathing effect (speed maps to period) - RainbowAnimation: HSV hue cycle across strip via colorsys.hsv_to_rgb - StrobeAnimation: on/off flashing at 1-20 Hz with configurable duty cycle - ColorWipeAnimation: progressive fill from start or end - FireAnimation: Fire2012 algorithm with cooling/sparking/heat-to-color mapping - ANIMATION_REGISTRY + create_animation() factory function - All 24 tests passing
59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
"""Chase animation — a lit segment moves along the strip."""
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from lightsync.animations.base import AnimationBase
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class ChaseAnimation(AnimationBase):
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"""Moving lit segment(s) chasing along the strip.
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At speed=1.0, the segment moves at 60 pixels/second.
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Pattern repeats every (size + spacing) pixels.
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"""
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def __init__(
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self,
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color: tuple[int, int, int] = (255, 255, 255),
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bg_color: tuple[int, int, int] = (0, 0, 0),
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speed: float = 0.5,
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size: int = 3,
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spacing: int = 7,
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reverse: bool = False,
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white: int = 0,
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) -> None:
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self.color = tuple(color) # type: ignore[arg-type]
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self.bg_color = tuple(bg_color) # type: ignore[arg-type]
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self.speed = speed
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self.size = size
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self.spacing = spacing
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self.reverse = reverse
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self.white = white
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def render(self, t: float, led_count: int) -> list[tuple]:
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period = self.size + self.spacing
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offset = int(t * self.speed * 60) # pixels/sec at speed=1.0 is 60
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pixels = []
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for i in range(led_count):
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if self.reverse:
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pos = (i + offset) % period
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else:
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pos = (i - offset) % period
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if pos < self.size:
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pixels.append(self.color)
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else:
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pixels.append(self.bg_color)
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return pixels
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@classmethod
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def from_params(cls, params: dict) -> "ChaseAnimation":
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return cls(
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color=tuple(params.get("color", [255, 255, 255])), # type: ignore[arg-type]
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bg_color=tuple(params.get("bg_color", [0, 0, 0])), # type: ignore[arg-type]
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speed=params.get("speed", 0.5),
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size=params.get("size", 3),
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spacing=params.get("spacing", 7),
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reverse=params.get("reverse", False),
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white=params.get("white", 0),
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)
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