import math
from time import sleep
import tkinter as tk
root = tk.Tk()

def draw_Triangle(startPoint, endPoint1, endPoint2):
    canvas.create_polygon(startPoint, endPoint1, endPoint2, outline='red', fill='white', width=2)


def Triangle_Pattern(): #绘制基本图案按钮所调用的函数
    canvas.delete("all")  # 清除画布
    startPoint=(80,130); endPoint1=(20,10); endPoint2=(140,10)
    draw_Triangle(startPoint, endPoint1, endPoint2)

def Triangle_tree(depth, percent, start_point, angle, length, canvas):
    if depth == 0: return
    # 左枝点和右枝点
    end_point1 = (start_point[0] - length * math.sin(math.radians(angle)),
                  start_point[1] - length * math.cos(math.radians(angle)))
    end_point2 = (start_point[0] + length * math.sin(math.radians(angle)),
                  start_point[1] - length * math.cos(math.radians(angle)))
    # 画三角形
    draw_Triangle(start_point, end_point1, end_point2)
    # 递归画左枝和画右枝
    Triangle_tree(depth - 1, percent, end_point1, angle, length * percent, canvas)
    Triangle_tree(depth - 1, percent, end_point2, angle, length * percent, canvas)
    canvas.update()
    sleep(0.001)

if __name__ == '__main__':
    canvas = tk.Canvas(root, width=1200, height=1000)
    canvas.pack()
    FinishLevel = 8
    TreePercent = 0.8
    InitPoint = (520, 650)
    InitAngle = 30
    InitLong = 170
    Triangle_tree(FinishLevel, TreePercent, InitPoint, InitAngle, InitLong, canvas)