如何让tkinter横向线条在指定纵向线条区间内移动以实现道路效果

核心修改逻辑 #

• 提取最外侧两条纵向标线的端点坐标，计算两条线的线性方程，可根据任意y坐标得到对应位置的道路左右边界x值
• 横向线条刷新时动态调整两端x坐标，使其始终限制在左右纵向标线的区间内，不会超出道路范围
• 保留原有移动循环和纵向线条生成逻辑，无需额外拆分列表

import time
from tkinter import *

class Template:
    def __init__(self):
        self.window = Tk()
        self.window.title("2D Display")

        self.canvas = self.canvas_display()
        self.line1 = self.line_creation(650,350,500 * .3, 1000)
        # 计算最左侧纵向线的线性参数
        left_line_coords = self.canvas.coords(self.line1[0])
        lx1, ly1, lx2, ly2 = left_line_coords
        self.left_k = (ly2 - ly1) / (lx2 - lx1)
        self.left_b = ly1 - self.left_k * lx1
        # 计算最右侧纵向线的线性参数
        right_line_coords = self.canvas.coords(self.line1[-1])
        rx1, ry1, rx2, ry2 = right_line_coords
        self.right_k = (ry2 - ry1) / (rx2 - rx1)
        self.right_b = ry1 - self.right_k * rx1

        self.line3 = self.line_movement_creation(0, 350,2000, 350)
        self.horizon = self.canvas.create_line(0,350,2000, 350, width = 2, fill ="white")
        self.speedx = 0
        self.speedy = 9
        self.active = True
        self.pos1 = []

        self.move_active()
        self.canvas.update()

    def canvas_display(self):
        canvas = Canvas(self.window, width=500, height=400, background='black')
        canvas.pack(expand=True, fill="both")
        canvas.update()
        return canvas

    def line_creation(self,x,y,x1,y1):
        spacing = 0
        lines = []
        for i in range(11):
            id = self.canvas.create_line( x, y, x1 + spacing, y1, width=2, fill="white")
            lines.append(id)
            spacing += 100
            pos1 = self.canvas.coords(id)
            self.pos1 = pos1
        return lines

    def line_movement_creation(self,x,y,x1,y1):
        spacing1 = 0
        lines = []
        for i in range(4):
            current_y = y + spacing1
            # 按当前高度的道路边界生成横向线
            left_x = (current_y - self.left_b) / self.left_k
            right_x = (current_y - self.right_b) / self.right_k
            id = self.canvas.create_line(left_x , current_y, right_x, current_y, width=2, fill="white")
            lines.append(id)
            spacing1 += 100
        return lines

    def line_update(self):
        for line in self.line3:
            pos = self.canvas.coords(line)
            new_y = pos[1] + self.speedy
            # 超出下边界后重置到地平线位置循环
            if new_y >= 800:
                new_y = 350
            # 动态调整横向线长度匹配当前道路宽度
            left_x = (new_y - self.left_b) / self.left_k
            right_x = (new_y - self.right_b) / self.right_k
            self.canvas.coords(line, left_x, new_y, right_x, new_y)

    def move_active(self):
        if self.active:
            self.line_update()
            self.window.after(40, self.move_active)

    def run(self):
        self.window.mainloop()

if __name__ == '__main__':
    Temp = Template()
    Temp.run()

内容的提问来源于stack exchange，提问作者user14232195