Dft-wl

from math import sin, cos, pi, log
from tkinter import *

CANVAS_WIDTH = 640
CANVAS_HEIGHT = 480
CANVAS_CENTER_X = CANVAS_WIDTH / 2
CANVAS_CENTER_Y = CANVAS_HEIGHT / 2
IMAGE_ENLARGE = 11
HEART_COLOR = "#FFC0CB" # ff2121


def heart_function(t, shrink_ratio: float = IMAGE_ENLARGE):
x = 16 * (sin(t) ** 3)
y = -(13 * cos(t) - 5 * cos(2 * t) - 2 * cos(3 * t) - cos(4 * t))

x *= shrink_ratio
y *= shrink_ratio

x += CANVAS_CENTER_X
y += CANVAS_CENTER_Y

return int(x), int(y)


def scatter_inside(x, y, beta=0.15):
ratio_x = - beta * log(random.random())
ratio_y = - beta * log(random.random())

dx = ratio_x * (x - CANVAS_CENTER_X)
dy = ratio_y * (y - CANVAS_CENTER_Y)

return x - dx, y - dy


def shrink(x, y, ratio):
force = -1 / (((x - CANVAS_CENTER_X) ** 2 + (y - CANVAS_CENTER_Y) ** 2) ** 0.6) # 这个参数...
dx = ratio * force * (x - CANVAS_CENTER_X)
dy = ratio * force * (y - CANVAS_CENTER_Y)
return x - dx, y - dy


def curve(p):
return 2 * (2 * sin(4 * p)) / (2 * pi)