我有一个画布创建的图像:
在画布上,我画了一个圆圈:
产生该圆的代码:
def create_circle(x, y, r, canvasName): #center coordinates, radius
x0 = x - r
y0 = y - r
x1 = x + r
y1 = y + r
return canvasName.create_oval(x0, y0, x1, y1, outline='red')
create_circle(100, 100, 50, canvas)
我想获得画布创建的图像,以每个像素精确地跟随画布绘制的圆圈(绕圆圈)。这怎么可能?
详细说明一下,这是我希望画布图像执行的演示:
答案 0 :(得分:1)
您可以使用root.after
发送定期呼叫来更改图像的坐标。之后,只需计算每次调用中图像的新的x,y位置即可。
import tkinter as tk
from math import cos, sin, radians
root = tk.Tk()
root.geometry("500x500")
canvas = tk.Canvas(root, background="black")
canvas.pack(fill="both",expand=True)
image = tk.PhotoImage(file="plane.png").subsample(4,4)
def create_circle(x, y, r, canvasName):
x0 = x - r
y0 = y - r
x1 = x + r
y1 = y + r
return canvasName.create_oval(x0, y0, x1, y1, outline='red')
def move(angle):
if angle >=360:
angle = 0
x = 200 * cos(radians(angle))
y = 200 * sin(radians(angle))
angle+=1
canvas.coords(plane, 250+x, 250+y)
root.after(10, move, angle)
create_circle(250, 250, 200, canvas)
plane = canvas.create_image(450,250,image=image)
root.after(10, move, 0)
root.mainloop()