blinky-py/gradients.py

from random import random

from colors import Colors
import colors


def clamp8(v):
    return 255 if v >= 255 else 0 if v <= 0 else round(v)

class Gradient:
    def __init__(self, rgb_colors):
        self.colors = rgb_colors[::-1]

    def at(self, x):
        i_left = int(x * len(self.colors))
        i_right = i_left + 1 if i_left < len(self.colors) - 1 else 0
        ratio = (x * len(self.colors)) - i_left
        return tuple(clamp8(left + ratio * (right - left)) for (left, right) in zip(self.colors[i_left], self.colors[i_right]))

    def from_dict(dict):
        if 'preset' in dict:
            return getattr(Gradients, dict['preset'])
        return Gradient([getattr(Colors, color) if isinstance(color, str) else color for color in dict['colors']])


rainbow = Gradient([
    Colors.red,
    Colors.orange,
    Colors.yellow,
    Colors.green,
    Colors.blue,
    Colors.purple
])


class Gradients:
    # Gradient Presets

    # Fun

    rainbow = rainbow    

    dark_rainbow = Gradient([
        Colors.dark_red,
        Colors.dark_orange,
        Colors.dark_yellow,
        Colors.dark_green,
        Colors.dark_blue,
        Colors.dark_purple
    ])

    pale_rainbow = Gradient([
        Colors.pale_red,
        Colors.pale_orange,
        Colors.pale_yellow,
        Colors.pale_green,
        Colors.pale_blue,
        Colors.pale_purple
    ])

    random = Gradient([Colors.black if i % 2 else rainbow.at(random()) for i in range(0, 100)])

    pusheen = Gradient([
        Colors.teal,
        Colors.pink
    ])

    peacock = Gradient([
        Colors.teal,
        Colors.black,
        Colors.purple,
        Colors.blue,
    ])


    # Sports

    kraken = Gradient([
        (  0,   1,   3), # Navy blue
        ( 24,  60,  48), # Light blue
        (  0,   1,   3), # Navy blue (again)
        ( 10,  25,  25), # Blue (greenish)
    ])


    # Holiday

    love = Gradient([
        Colors.pink,
        Colors.black,
        Colors.red,
        Colors.black
    ])

    irish = Gradient([
        Colors.dark_green,
        Colors.black,
        Colors.green,
        Colors.black,
    ])

    bunny = Gradient([
        Colors.pink,
        Colors.pale_purple,
        Colors.black,
        Colors.pale_yellow,
        Colors.pale_green,
        Colors.black,
    ])

    patriot = Gradient([
        Colors.red,
        Colors.black,
        Colors.black,
        Colors.white,
        Colors.black,
        Colors.black,
        Colors.blue,
        Colors.black,
        Colors.black,
    ])

    pumpkin = Gradient([
        Colors.orange,
        Colors.black,
        Colors.purple,
        Colors.black,
    ]) 

    turkey = Gradient([
        Colors.orange,
        Colors.black,
        Colors.dark_green,
        Colors.black,
        Colors.brown,
        Colors.black,
        Colors.dark_yellow,
        Colors.black,
    ])

    mazel = Gradient([
        Colors.blue,
        Colors.black,
        Colors.white,
        Colors.black,
    ])

    santa = Gradient([
        Colors.red,
        Colors.white,
        Colors.green,
        Colors.black,
    ])