我正在用tkinter创建一个platofromer，我将player置于“相机”（canvas view）的中心，并且当用户按下Arrow left或{{1 }}
玩家移动其脚架，然后摄像机跟随他。
如果没有背景图像，效果很好，但是当我添加背景图像（3600x1070）并按Arrow right时，游戏开始出现延迟。滞后是由Arrow left/right引起的，它使相机跟随播放器，但我不知道如何解决。这是一个显示我的问题的可执行示例
canvas scroll如果您按向右箭头来模拟玩家的移动，您会看到粒子如何在下落时开始减速，您越靠近图像中心，它们的速度就越慢。
如果您删除from tkinter import *
from random import *
from PIL import Image, ImageTk
ARROW_LEFT = 37
ARROW_RIGHT = 39
master = Tk()
key_list = []
ws = master.winfo_screenwidth()
hs = master.winfo_screenheight()
x = (ws / 2) - (700 // 2)
y = (hs / 2) - (700 // 2)
master.geometry('%dx%d+%d+%d' % (700 + 4, 700 + 4, x, y))
master.title("My game")
canvas = Canvas(master, width=2000, height=2000, bg="black")
canvas.configure(scrollregion=(0, 0, 5000, 5000), yscrollincrement='1', xscrollincrement='1')
canvas.grid(row=0)
class Background:
def __init__(self, canvas=None, background_path="", game_window=None):
self.game_window = game_window
self.canvas = canvas
self.image = Image.open(background_path)
self.img_copy = self.image.copy()
self.image = self.img_copy.resize((ws * 2, hs))
self.background_image = ImageTk.PhotoImage(self.image)
x = (2000//2) - ws//2
y = (2000/2) - hs
self.background = self.canvas.create_image(x, y, image=self.background_image, tag='background', anchor=NW)
class Rain:
def __init__(self, master):
self.canvas = canvas
self.master = master
self.lenght = randint(10, 20)
self.rain_speed = randint(5, 30)
self.particel_speed = randint(5, 50)
def blob(self):
x1 = randint(canvas.canvasx(0), canvas.canvasx(ws))
y1 = 0
colors = ["red", "yellow", "blue", "green", "purple"]
index = randint(0, len(colors) - 1)
line = self.canvas.create_line(x1, y1, x1, y1 + self.lenght, fill=colors[index], width=2, tag="rain")
self.move(line, self.canvas.coords(line))
def move(self, line, coords):
line_x1 = round(coords[0])
line_y1 = round(coords[1])
line_x2 = round(coords[2])
line_y2 = round(coords[3])
if line_y2 > canvas.canvasy(hs) or line_x1 < canvas.canvasx(0) or line_x1 > canvas.canvasx(ws):
self.canvas.delete(line)
self.blob()
return
else:
self.canvas.coords(line, coords[0], coords[1] + 5, coords[2],
coords[3] + 5)
coords = self.canvas.coords(line)
self.master.after(self.rain_speed, lambda: self.move(line, coords))
def rain():
for _ in range(20):
Rain(master).blob()
def scroll_screen_left(canvas):
canvas.xview_scroll(-3, UNITS)
def scroll_screen_right(canvas):
canvas.xview_scroll(3, UNITS)
def key_listner(event):
event = event.keycode
if event not in key_list:
key_list.append(event)
def key_organizator():
if len(key_list) > -1:
combo = [
{ARROW_LEFT},
{ARROW_RIGHT},
]
if set(key_list) in combo:
pass
else:
for key in key_list:
if {key} in combo:
key_list.clear()
key_list.append(key)
if set(key_list) in combo:
if ARROW_LEFT in key_list:
scroll_screen_left(canvas) # lag
elif ARROW_RIGHT in key_list:
scroll_screen_right(canvas) # lag
master.after(10, lambda: key_organizator())
def clear_key(event):
event = event.keycode
if event in key_list:
key_list.remove(event)
BACKGROUND_1_LAYER_PATH = "assets/background/background_1.png"
layer1_background = Background(canvas=canvas, background_path=BACKGROUND_1_LAYER_PATH)
key_organizator()
rain()
master.bind("<KeyRelease>", clear_key)
master.bind("<KeyPress>", key_listner)
master.mainloop()
行
您可以在没有背景图片的情况下看到它的工作原理（微粒移动得更快）