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127 lines
3.1 KiB
Python
127 lines
3.1 KiB
Python
from __future__ import annotations
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from typing import Iterable, Union
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from colour import Color
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from colour import hex2rgb
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from colour import rgb2hex
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import numpy as np
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from manimlib.constants import WHITE
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from manimlib.constants import COLORMAP_3B1B
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from manimlib.utils.bezier import interpolate
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from manimlib.utils.iterables import resize_with_interpolation
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ManimColor = Union[str, Color]
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def color_to_rgb(color: ManimColor) -> np.ndarray:
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if isinstance(color, str):
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return hex_to_rgb(color)
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elif isinstance(color, Color):
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return np.array(color.get_rgb())
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else:
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raise Exception("Invalid color type")
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def color_to_rgba(color: ManimColor, alpha: float = 1.0) -> np.ndarray:
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return np.array([*color_to_rgb(color), alpha])
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def rgb_to_color(rgb: Iterable[float]) -> Color:
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try:
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return Color(rgb=tuple(rgb))
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except ValueError:
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return Color(WHITE)
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def rgba_to_color(rgba: Iterable[float]) -> Color:
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return rgb_to_color(tuple(rgba)[:3])
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def rgb_to_hex(rgb: Iterable[float]) -> str:
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return rgb2hex(rgb, force_long=True).upper()
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def hex_to_rgb(hex_code: str) -> tuple[float]:
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return hex2rgb(hex_code)
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def invert_color(color: ManimColor) -> Color:
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return rgb_to_color(1.0 - color_to_rgb(color))
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def color_to_int_rgb(color: ManimColor) -> np.ndarray:
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return (255 * color_to_rgb(color)).astype('uint8')
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def color_to_int_rgba(color: ManimColor, opacity: float = 1.0) -> np.ndarray:
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alpha = int(255 * opacity)
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return np.array([*color_to_int_rgb(color), alpha])
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def color_gradient(
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reference_colors: Iterable[ManimColor],
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length_of_output: int
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) -> list[Color]:
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if length_of_output == 0:
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return []
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rgbs = list(map(color_to_rgb, reference_colors))
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alphas = np.linspace(0, (len(rgbs) - 1), length_of_output)
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floors = alphas.astype('int')
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alphas_mod1 = alphas % 1
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# End edge case
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alphas_mod1[-1] = 1
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floors[-1] = len(rgbs) - 2
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return [
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rgb_to_color(interpolate(rgbs[i], rgbs[i + 1], alpha))
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for i, alpha in zip(floors, alphas_mod1)
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]
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def interpolate_color(
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color1: ManimColor,
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color2: ManimColor,
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alpha: float
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) -> Color:
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rgb = interpolate(color_to_rgb(color1), color_to_rgb(color2), alpha)
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return rgb_to_color(rgb)
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def average_color(*colors: ManimColor) -> Color:
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rgbs = np.array(list(map(color_to_rgb, colors)))
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return rgb_to_color(rgbs.mean(0))
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def random_color() -> Color:
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return Color(rgb=tuple(np.random.random(3)))
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def random_bright_color() -> Color:
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color = random_color()
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return average_color(color, Color(WHITE))
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def get_colormap_list(
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map_name: str = "viridis",
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n_colors: int = 9
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) -> np.ndarray:
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"""
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Options for map_name:
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3b1b_colormap
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magma
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inferno
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plasma
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viridis
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cividis
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twilight
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twilight_shifted
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turbo
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"""
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from matplotlib.cm import get_cmap
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if map_name == "3b1b_colormap":
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rgbs = [color_to_rgb(color) for color in COLORMAP_3B1B]
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else:
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rgbs = get_cmap(map_name).colors # Make more general?
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return resize_with_interpolation(np.array(rgbs), n_colors)
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