问题描述
我正在用 python 3.2 龟编码，我有一张漂亮的坦克图.我知道如何将它向左移动并书写.然而，当试图让坦克上下移动时.我面临着它上升的问题，但如果我放手并再次按下向上按钮.它转向左边.可能很难解释，所以我包含了代码.
I am coding in python 3.2 turtle and I have this beautiful drawing of a tank. and I know how to move it left and write. However, when trying to make the tank move up and down. I am faced with the problem that it goes up but if I let go and press the up button again. It turns to the left. It might be hard to explain so I included code.
"""
Programmer: Bert
Tank Run 1
"""
#------------------------------------------------------------------------------
#Importing random modules geddit
from turtle import *
from turtle import Turtle
import turtle
import random
#Welcome Statement and story
input("WELCOME TO TANK RUN 1!! PRESS ENTER TO CONTINUE")
Name = input("Name your Tank: ")
quitFunction = input(
"""The """ + Name + """ is in a battle and heading toward the
enemy base camp so that the """ + Name + """ can blow it up
Get to the base camp and do not let enemy
artillery, or soldiers kill you. Good luck"""
)
#setting up variables
unVar1 = 25
unVar2 = 100
unVar3 = 90
unVar4 = 150
unVar5 = -30
unVar6 = 75
unVar7 = 50
t = Turtle()
#defining shapes
def polySquare(t, x, y, length):
t.goto(x, y)
t.setheading(270)
t.begin_poly()
for count in range(4):
t.forward(length)
t.left(90)
t.end_poly()
return t.get_poly()
def polyCircle(t, x, y, radius):
t.up()
t.goto(x, y)
t.down()
t.hideturtle()
t.circle(radius)
t.end_poly()
return t.get_poly()
def polyRectangle(t, x, y, length1, length2):
t.goto(x, y)
t.setheading(270)
t.begin_poly()
for count in range(2):
t.forward(length1)
t.left(90)
t.forward(length2)
t.left(90)
t.end_poly()
return t.get_poly()
def drawLine(t, x1, x2, y1, y2):
t.up()
t.hideturtle()
t.goto(x1, y1)
t.do+wn()
t.goto(x2, y2)
def tankCursor():
"""
Create the tank cursor. An alternate solution is to toss the temporary turtle
and use the commented out polygon assignments instead of the poly* function calls
"""
temporary = turtle.Turtle()
screen = turtle.getscreen()
delay = screen.delay()
screen.delay(0)
temporary.hideturtle()
temporary.penup()
tank = turtle.Shape("compound")
# tire1 = ((10, unVar1), (10, unVar1 - unVar6), (10 + 30, unVar1 - unVar6), (10 + 30, unVar1))
tire1 = polyRectangle(temporary, 10, unVar1, unVar6, 30) # Tire #1
tank.addcomponent(tire1, "gray", "black")
# tire2 = ((110, unVar1), (110, unVar1 - unVar6), (110 + 30, unVar1 - unVar6), (110 + 30, unVar1))
tire2 = polyRectangle(temporary, 110, unVar1, unVar6, 30) # Tire #2
tank.addcomponent(tire2, "gray", "black")
# tire3 = ((110, unVar2), (110, unVar2 - unVar6), (110 + 30, unVar2 - unVar6), (110 + 30, unVar2))
tire3 = polyRectangle(temporary, 110, unVar2, unVar6, 30) # Tire #3
tank.addcomponent(tire3, "gray", "black")
# tire4 = ((10, unVar2), (10, unVar2 - unVar6), (10 + 30, unVar2 - unVar6), (10 + 30, unVar2))
tire4 = polyRectangle(temporary, 10, unVar2, unVar6, 30) # Tire #4
tank.addcomponent(tire4, "gray", "black")
# bodyTank = ((20, unVar3), (20, unVar3 - 130), (20 + 110, unVar3 - 130), (20 + 110, unVar3))
bodyTank = polyRectangle(temporary, 20, unVar3, 130, 110)
tank.addcomponent(bodyTank, "black", "gray")
# gunTank = ((65, unVar4), (65, unVar4 - 100), (65 + 20, unVar4 - 100), (65 + 20, unVar4))
gunTank = polyRectangle(temporary, 65, unVar4, 100, 20) # Gun
tank.addcomponent(gunTank, "black", "gray")
# exhaustTank = ((50, unVar5), (50, unVar5 - 20), (50 + 10, unVar5 - 20), (50 + 10, unVar5))
exhaustTank = polyRectangle(temporary, 50, unVar5, 20, 10)
tank.addcomponent(exhaustTank, "black", "gray")
# turretTank = ((50, unVar7), (50, unVar7 - 50), (50 + 50, unVar7 - 50), (50 + 50, unVar7))
turretTank = polySquare(temporary, 50, unVar7, 50) # Turret
tank.addcomponent(turretTank, "red", "gray")
turtle.addshape("tank", shape=tank)
del temporary
screen.delay(delay)
tankCursor() # creates and registers the "tank" cursor shape
tank = turtle
tank.shape("tank")
turtle.up() # get rid of the ink
screen = turtle.Screen()
def moveforward(): #I cannot get this function to work
tank.left(90)
tank.forward(40)
def movebackward(): #I cannot get this function to work
tank.left(90)
tank.backward(40)
def moveright():
tank.forward(40)
def moveleft():
tank.backward(40)
#Background color
t.screen.bgcolor("green")
#Movement of tank
screen.onkeypress(moveright, "Right")
screen.onkeypress(moveleft, "Left")
screen.onkeypress(moveforward, "Up")
screen.onkeypress(movebackward, "Down")
推荐答案
绘制自定义光标时，除非有理由不这样做，否则请保持光标设计以原点 (0, 0) 为中心.如果你画到原点的一侧，那么当你的乌龟向右或向左转时，它不会对称地这样做.也就是说，当它转向一个方向时，它看起来很快，但在相反的方向上，它似乎绕了很远".
When drawing a custom cursor, unless you have a reason not to do so, keep your cursor design centered about the origin, (0, 0). If you draw to one side of the origin, then when your turtle turns right or left, it won't do so symmetrically. That is, as it turns in one direction, it will appear to do so quickly but in the opposite direction, it will appear to "take the long way around".
我已经处理了坦克光标下方的多边形，使其中心是炮塔的中心，并从绘图例程中删除了 setheading() 调用.
I've worked the polygons underlying the tank cursor so that it's center is the center of the turret and removed the setheading() calls from the drawing routines.
这个例子使用了我认为的一致运动:无论坦克方向如何，向上"是向前，向下"是向后，左"是向左 90 度，右"是向右 90 度.我还简化了示例以演示运动:
This example uses what I think is consistent motion: regardless of tank orientation, 'up' is forward, 'down' is backward, 'left' is 90 degrees to the left and 'right' is 90 degrees to the right. I've also stripped down the example just to demonstrate the motion:
import turtle
# Defining shapes
def polySquare(t, x, y, length):
t.goto(x, y)
t.begin_poly()
for count in range(4):
t.forward(length)
t.left(90)
t.end_poly()
return t.get_poly()
def polyRectangle(t, x, y, length1, length2):
t.goto(x, y)
t.begin_poly()
for count in range(2):
t.forward(length1)
t.left(90)
t.forward(length2)
t.left(90)
t.end_poly()
return t.get_poly()
def tankCursor():
"""
Create the tank cursor.
"""
temporary = turtle.Turtle()
temporary.hideturtle()
temporary.penup()
screen = turtle.getscreen()
delay = screen.delay()
screen.delay(0)
tank = turtle.Shape("compound")
tire1 = polyRectangle(temporary, -65, -75, 30, 75) # Tire #1
tank.addcomponent(tire1, "gray", "black")
tire2 = polyRectangle(temporary, 35, -75, 30, 75) # Tire #2
tank.addcomponent(tire2, "gray", "black")
tire3 = polyRectangle(temporary, 35, 0, 30, 75) # Tire #3
tank.addcomponent(tire3, "gray", "black")
tire4 = polyRectangle(temporary, -65, 0, 30, 75) # Tire #4
tank.addcomponent(tire4, "gray", "black")
bodyTank = polyRectangle(temporary, -55, -65, 110, 130)
tank.addcomponent(bodyTank, "black", "gray")
gunTank = polyRectangle(temporary, -10, 25, 20, 100) # Gun
tank.addcomponent(gunTank, "black", "gray")
exhaustTank = polyRectangle(temporary, -25, -75, 10, 20)
tank.addcomponent(exhaustTank, "black", "gray")
turretTank = polySquare(temporary, -25, -25, 50) # Turret
tank.addcomponent(turretTank, "red", "gray")
turtle.addshape("tank", shape=tank)
del temporary
screen.delay(delay)
tankCursor() # creates and registers the "tank" cursor shape
turtle.shape("tank")
turtle.up() # get rid of the ink
# Movement of tank
screen = turtle.Screen()
screen.onkeypress(lambda : turtle.right(90), "Right")
screen.onkeypress(lambda : turtle.left(90), "Left")
screen.onkeypress(lambda : turtle.forward(40), "Up")
screen.onkeypress(lambda : turtle.backward(40), "Down")
turtle.listen()
turtle.mainloop()
这篇关于python乌龟的逻辑错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！