Screensaver.py

# Copyright (c) 2020, Piotr Esden-Tempski <piotr@esden.net>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import random
import math
import LEDString


class Screensaver:

    # these are dots in bowl parameters
    dotspeed = 22
    dots_in_bowls_count = 3
    dot_distance = 65535 / dots_in_bowls_count
    dot_brightness = 255

    def __init__(self, ledstring):
        self.ledstring = ledstring

    def tick(self, time):
        mode = int(time / 3000) % 5
        # mode = 4
        ledstring = self.ledstring

        # print(f"m: {mode}")
        if mode == 0:
            # Marching green <> orange
            for led in ledstring:
                led.nscale8(250)

            n = int((time / 250) % 10)
            c = int(20 + ((math.sin(math.radians(time / 5000.00)) * 255 + 1) * 33)) % 256
            # print(f"t: {time / 5000.00} c: {c}")
            for i in range(len(ledstring)):
                if i % 10 == n:
                    result = ledstring[i].nhsv_rainbow(c, 255, 150)
            # print(result)

        elif mode == 1:
            # Random flashes
            for led in ledstring:
                led.nscale8(250)

            for i in range(len(ledstring)):
                if random.randrange(0, 20) == 0:
                    ledstring[i].nhsv_rainbow(25, 255, 100)

        elif mode == 2:
            # dots in bowl
            ledstring.clear()

            for i in range(Screensaver.dots_in_bowls_count):
                mm = (((i * Screensaver.dot_distance) + (time % (2 ** 32)) * Screensaver.dotspeed) % (2 ** 16)) / (2 ** 15)
                n = int((((math.sin(mm * math.pi) + 1) / 2) * (len(ledstring) - 5)) + 2)
                c = int(mm * 128)
                # print(f"mm {mm} n {n} c {c}")
                ledstring[n - 2] += LEDString.hsv_rainbow(c, 255, Screensaver.dot_brightness // 4)
                ledstring[n - 1] += LEDString.hsv_rainbow(c, 255, Screensaver.dot_brightness // 2)
                ledstring[n + 0] += LEDString.hsv_rainbow(c, 255, Screensaver.dot_brightness)
                ledstring[n + 1] += LEDString.hsv_rainbow(c, 255, Screensaver.dot_brightness // 2)
                ledstring[n + 2] += LEDString.hsv_rainbow(c, 255, Screensaver.dot_brightness // 4)

        elif mode == 3:
            # Sparkles
            for led in ledstring:
                led.nscale8(128)

            c = time % 800
            if c < 240:
                n = 121 - c // 2
            else:
                n = 1

            for i in range(len(ledstring)):
                if random.randrange(0, 256) <= n:
                    ledstring[i].rgb((100, 100, 100))

        else:
            # Scroll dots
            for i in range(len(ledstring)):
                if (i + (time // 100)) % 5 == 0:
                    ledstring[i].rgb((100, 100, 100))
                else:
                    ledstring[i].rgb((0, 0, 0))