lissajous.py

Created by schraf
Created on October 14, 2025
1.21 KB
from kandinsky import draw_string, fill_rect
from math import sin, cos, pi
from time import sleep, monotonic

BG_COLOR = (0, 0, 0)
STAR = "*"
N_POINTS = 160
SCALE = 88
CENTER_X =  160
CENTER_Y = 111
FPS_SLEEP = 0.1

a = 3.0
b = 2.0
delta = 0.0
speed = 0.05
mode = 2

STAR_COLOR = (255, 255, 255)

def clear_screen():
    fill_rect(0, 0,  320, 222, BG_COLOR)

def draw_lissajous(a_, b_, delta_, points=N_POINTS):
    t_max = 2 * pi
    for i in range(points):
        t = (i / (points - 1)) * t_max
        x = CENTER_X + SCALE * sin(a_ * t + delta_)
        y = CENTER_Y + SCALE * sin(b_ * t)
        draw_string(STAR, int(x), int(y), STAR_COLOR, BG_COLOR)

try:
    t0 = monotonic()
    last_time = t0
    while True:
        now = monotonic()
        dt = now - last_time
        elapsed = now - t0
        if mode == 1:
            delta += speed * dt * 2 * pi
            a_use = a
            b_use = b
        else:
            a_use = a + 1.5 * sin(elapsed * 0.7)
            b_use = b + 1.2 * cos(elapsed * 0.9)
            delta += speed * dt * pi * 0.2
        clear_screen()
        draw_lissajous(a_use, b_use, delta)
        sleep(FPS_SLEEP)
        last_time = now

except KeyboardInterrupt:
    clear_screen()