如何增加turtle.tracer()的延迟?[PYTHON]
我在Pyzo做一个实践项目,我在turtle.tracer()方面遇到了一些问题 当n=/=0或1时,我遇到一个问题,屏幕上的对象开始闪烁如何增加turtle.tracer()的延迟?[PYTHON],python,pyzo,python-turtle,Python,Pyzo,Python Turtle,我在Pyzo做一个实践项目,我在turtle.tracer()方面遇到了一些问题 当n=/=0或1时,我遇到一个问题,屏幕上的对象开始闪烁 import turtle sketcher = turtle.Turtle() canvas = turtle.Screen() sketcher.speed(0) sketcher.hideturtle() def drawPinwheelAnimation(length): sketcher.setheading(90) backw
import turtle
sketcher = turtle.Turtle()
canvas = turtle.Screen()
sketcher.speed(0)
sketcher.hideturtle()
def drawPinwheelAnimation(length):
sketcher.setheading(90)
backwardLength = length
lengthChange = 1
while(True):
canvas.tracer(36)
drawPinwheel(0, 0, length, backwardLength)
drawPinwheel(3*length, 0, length, backwardLength)
drawPinwheel(0, 3*length, length, backwardLength)
drawPinwheel(-3*length, 0, length, backwardLength)
drawPinwheel(0, -3*length, length, backwardLength)
canvas.update()
backwardLength += lengthChange
if(backwardLength == (1.5*length) or backwardLength == (0.5*length)):
lengthChange *= -1
sketcher.clear()
def drawSwingingPinwheel(xPos, yPos, initialLength):
while(True):
drawPinwheel(xPos, yPos, forwardLength, backwardLength)
backwardLength += lengthChange
if(backwardLength == (1.5*initialLength) or backwardLength == (0.5*initialLength)):
lengthChange *= -1
sketcher.clear()
def drawPinwheel(xPos, yPos, fdLength, bkLength):
sketcher.penup()
sketcher.setpos(xPos, yPos)
sketcher.pendown()
for side in range(12):
sketcher.fd(fdLength)
sketcher.bk(bkLength)
sketcher.rt(30)
drawPinwheelAnimation(50)
turtle.mainloop()
当n=1时,没有闪烁,但这也意味着动画以基本速度运行,因此没有效果。当n=0时,没有闪烁。然而,这对我来说太快了。我尝试更改“延迟”值,但无效:
canvas.tracer(0, 1000) #Changing the second value to 1000 has no notable difference.
drawPinwheel(0, 0, length, backwardLength)
drawPinwheel(3*length, 0, length, backwardLength)
drawPinwheel(0, 3*length, length, backwardLength)
drawPinwheel(-3*length, 0, length, backwardLength)
drawPinwheel(0, -3*length, length, backwardLength)
canvas.update()
在这一点上我很困惑。也许有一个很明显的解决方案我没有,我不确定
谢谢 我终于找到了答案 在Screen.update()之后可以使用一个名为time.sleep()的函数。如果您在time.sleep()内输入一个值,它将在再次刷新之前暂停数秒 例如,我通过以下操作修复了自己的代码:
import turtle
import time
sketcher = turtle.Turtle()
canvas = turtle.Screen()
sketcher.speed(0)
sketcher.hideturtle()
def drawPinwheelAnimation(length):
sketcher.setheading(90)
backwardLength = length
lengthChange = 1
while(True):
canvas.tracer(0)
drawPinwheel(0, 0, length, backwardLength)
drawPinwheel(3*length, 0, length, backwardLength)
drawPinwheel(0, 3*length, length, backwardLength)
drawPinwheel(-3*length, 0, length, backwardLength)
drawPinwheel(0, -3*length, length, backwardLength)
canvas.update()
time.sleep(.01) # <-------- Here's the time.sleep() function!
backwardLength += lengthChange
if(backwardLength == (1.5*length) or backwardLength == (0.5*length)):
lengthChange *= -1
sketcher.clear()
def drawSwingingPinwheel(xPos, yPos, initialLength):
while(True):
drawPinwheel(xPos, yPos, forwardLength, backwardLength)
backwardLength += lengthChange
if(backwardLength == (1.5*initialLength) or backwardLength == (0.5*initialLength)):
lengthChange *= -1
sketcher.clear()
def drawPinwheel(xPos, yPos, fdLength, bkLength):
sketcher.penup()
sketcher.setpos(xPos, yPos)
sketcher.pendown()
for side in range(12):
sketcher.fd(fdLength)
sketcher.bk(bkLength)
sketcher.rt(30)
drawPinwheelAnimation(50)
turtle.mainloop()
导入海龟
导入时间
sketcher=turtle.turtle()
canvas=turtle.Screen()
速度(0)
sketcher.hideturtle()
def DrawPinwheel动画(长度):
草图绘制者设置标题(90)
后向长度=长度
长度变化=1
虽然(正确):
canvas.tracer(0)
牵引销轮(0,0,长度,后向长度)
牵引销轮(3*长度,0,长度,后向长度)
牵引销轮(0,3*长度,长度,后向长度)
牵引销轮(-3*长度,0,长度,后向长度)
牵引销轮(0,-3*长度,长度,后向长度)
canvas.update()
time.sleep(.01)#你不需要,也不想要,time.sleep()。首先,您需要根据tracer()
和update()
适当地安排您的程序:
其次,我将您的替换为True:
,它在像turtle这样的事件驱动环境中没有位置,而是替换为计时器事件。请注意ontimer()
的第二个参数,它是再次调用此方法之前的时间延迟
from turtle import Screen, Turtle
def drawPinwheelAnimation(length, lengthChange=1, backwardLength=None):
if backwardLength is None:
backwardLength = length
turtle.clear()
drawPinwheel(0, 0, length, backwardLength)
drawPinwheel(3*length, 0, length, backwardLength)
drawPinwheel(0, 3*length, length, backwardLength)
drawPinwheel(-3*length, 0, length, backwardLength)
drawPinwheel(0, -3*length, length, backwardLength)
screen.update()
backwardLength += lengthChange
if backwardLength == (1.5*length) or backwardLength == 0.5*length:
lengthChange *= -1
screen.ontimer(lambda: drawPinwheelAnimation(length, lengthChange, backwardLength), 100)
def drawPinwheel(xPos, yPos, fdLength, bkLength):
turtle.penup()
turtle.setpos(xPos, yPos)
turtle.pendown()
for _ in range(12):
turtle.forward(fdLength)
turtle.backward(bkLength)
turtle.right(30)
screen = Screen()
screen.tracer(False)
turtle = Turtle()
turtle.hideturtle()
turtle.setheading(90)
drawPinwheelAnimation(50)
screen.mainloop()