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Content import buttons import defines import math import random import rgb import virtualtimers pixels = [ [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ], ] new_char_frequency = 100 def new_char(): coord_x = random.randint(0, 31) pixels[0][coord_x] = 255 run_again_in = new_char_frequency # time until this function should run again, in ms return run_again_in def core_loop(): frame = [] for x in range(31, -1, -1): for y in range(7, -1, -1): prev_brightness = pixels[y][x] new_brightness = decrease_brightness(prev_brightness) # prevent endlessly trailing display of almost 0 values if new_brightness < 20: new_brightness = 0 if trail_should_be_aborted(y, prev_brightness): prev_brightness = 250 write_pixel(new_brightness, x, y) if trail_should_extend_a_pixel_down(prev_brightness, y): write_pixel(prev_brightness, x, y + 1) for y in range(7, -1, -1): for x in range(31, -1, -1): brightness = pixels[y][x] frame_val = build_color_value(brightness) if pixel_is_tip_of_a_trail(brightness): frame_val = 0xaaaaaaff frame.append(frame_val) rgb.enablecomp() rgb.frame(frame) rgb.disablecomp() run_again_in = 71 # time until this function should run again, in ms return run_again_in # internal/"private" functions, used by the core loop def build_color_value(brightness): color_r = 0 * brightness * pow(16, 6) color_g = 1 * brightness * pow(16, 4) color_b = 0 * brightness * pow(16, 2) color_l = 255 frame_val = color_r + color_g + color_b + color_l return frame_val def decrease_brightness(prev_brightness): return max(0, math.ceil(prev_brightness * (random.randint(60, 99)/100))) def trail_should_be_aborted(y, prev_brightness): return y > 3 and random.randint(0, 100) > 95 and prev_brightness >= 255 def write_pixel(brightness, x, y): pixels[y][x] = brightness def trail_should_extend_a_pixel_down(prev_brightness, y): return y < 7 and prev_brightness >= 255 def pixel_is_tip_of_a_trail(brightness): return brightness >= 250 # Button callbacks def brightness_increase(button_is_down): if button_is_down: new_brightness = min(32, rgb.getbrightness()+4) rgb.setbrightness(new_brightness) pass def brightness_decrease(button_is_down): if button_is_down: new_brightness = max(0, rgb.getbrightness()-4) rgb.setbrightness(new_brightness) pass def char_frequency_increase(button_is_down): global new_char_frequency if button_is_down: new_char_frequency = min(1000, new_char_frequency+100) pass def char_frequency_decrease(button_is_down): global new_char_frequency if button_is_down: new_char_frequency = max(10, new_char_frequency-100) pass # Register button callbacks buttons.register(defines.BTN_DOWN, brightness_increase) buttons.register(defines.BTN_UP, brightness_decrease) buttons.register(defines.BTN_LEFT, char_frequency_increase) buttons.register(defines.BTN_RIGHT, char_frequency_decrease) # Start processes rgb.setbrightness(16) virtualtimers.begin(100) virtualtimers.new(0, core_loop) virtualtimers.new(0, new_char)