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42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
"""
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Copyright © IQ.Lvbs, apart of Project Teal Lvbs, All Rights Reserved, licensed under https://konn3kt.com/tos
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"""
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import colorsys
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import time
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import pyray as rl
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from openpilot.system.ui.lib.shader_polygon import draw_polygon, Gradient
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# Scrolling spectrum along the driving path: a fixed set of stops from the
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# bottom (1.0) to the top (0.0) of the path, each a full-saturation swatch whose
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# hue advances with time and whose opacity thins toward the horizon.
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_SEGMENTS = 8
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_SCROLL_DEG_PER_S = 50.0
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_SATURATION = 0.9
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_LIGHTNESS = 0.6
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_ALPHA_NEAR = 0.8 # opacity at the bottom of the path
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_ALPHA_HORIZON_FRACTION = 0.3 # how much of that opacity is shed by the top
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# Stop offsets are constant, so resolve them once.
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_STOP_OFFSETS = tuple(i / (_SEGMENTS - 1) for i in range(_SEGMENTS))
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def _swatch(hue_turns: float, alpha: float) -> rl.Color:
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r, g, b = colorsys.hls_to_rgb(hue_turns, _LIGHTNESS, _SATURATION)
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return rl.Color(int(r * 255), int(g * 255), int(b * 255), int(alpha * 255))
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def _spectrum_gradient() -> Gradient:
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scroll_deg = (time.monotonic() * _SCROLL_DEG_PER_S) % 360.0
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colors = []
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for offset in _STOP_OFFSETS:
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hue_deg = (scroll_deg + offset * 360.0) % 360.0
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alpha = _ALPHA_NEAR * (1.0 - offset * _ALPHA_HORIZON_FRACTION)
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colors.append(_swatch(hue_deg / 360.0, alpha))
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return Gradient(start=(0.0, 1.0), end=(0.0, 0.0), colors=colors, stops=list(_STOP_OFFSETS))
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class RainbowPath:
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def draw_rainbow_path(self, rect, path):
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draw_polygon(rect, path.projected_points, gradient=_spectrum_gradient())
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