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basic maze problem with turtle

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  basic maze problem with turtle baujacob@gmail.com - 2013-10-13 14:52 -0700
    Re: basic maze problem with turtle baujacob@gmail.com - 2013-10-13 15:18 -0700
      Re: basic maze problem with turtle Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-10-13 21:53 -0400
      Re: basic maze problem with turtle Joshua Landau <joshua@landau.ws> - 2013-10-14 23:58 +0100

#56779 — basic maze problem with turtle

Hi everyone, I'm trying to create a simple maze program. When the user finishes the maze, I want to print in big letters "You Win!" and when the user hits a wall, I want the user to go back to the beginning of the maze. The problem is "collision detection" which is an advanced topic and I'm only in a beginning programming class. Is there anyway I can force the user back to the starting point when the turtle hits the wall? Thank you in advance.

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#56782

On Sunday, October 13, 2013 2:52:50 PM UTC-7, bauj...@gmail.com wrote:
> Hi everyone, I'm trying to create a simple maze program. When the user finishes the maze, I want to print in big letters "You Win!" and when the user hits a wall, I want the user to go back to the beginning of the maze. The problem is "collision detection" which is an advanced topic and I'm only in a beginning programming class. Is there anyway I can force the user back to the starting point when the turtle hits the wall? Thank you in advance.


Sorry about that, I realized I forgot to include the code.
So basically I have one turtle that draws the maze at the beginning and then another turtle(userTurtle) that completes the maze. When the userTurtle hits any point on the wall, I want to force userTurtle back to the start of the maze.
 Here it is:

import turtle
userTurtle = turtle.Turtle()
draw = turtle.Turtle()
scr = turtle.Screen()

def drawMaze():
    draw.pencolor("gold")
    draw.pensize(3)
    draw.penup()
    draw.goto(0,-180)
    draw.pendown()
    draw.speed(10)
    draw.setheading(180)
    draw.fd(180)
    draw.setheading(90)
    draw.fd(60)
    draw.setheading(0)
    draw.fd(120)
    draw.backward(120)
    draw.setheading(90)
    draw.fd(300)
    draw.setheading(0)
    draw.fd(120)
    draw.setheading(-90)
    draw.fd(120)
    draw.setheading(180)
    draw.fd(60)
    draw.setheading(90)
    draw.fd(60)
    draw.setheading(-90)
    draw.fd(120)
    draw.setheading(90)
    draw.fd(60)
    draw.setheading(0)
    draw.fd(120)
    draw.setheading(-90)
    draw.fd(60)
    draw.setheading(0)
    draw.fd(60)
    draw.setheading(-90)
    draw.fd(60)
    draw.backward(60)
    draw.setheading(0)
    draw.fd(60)
    draw.setheading(90)
    draw.fd(60)
    draw.penup()
    draw.setheading(180)
    draw.fd(60)
    draw.pendown()
    draw.setheading(90)
    draw.fd(60)
    draw.setheading(180)
    draw.fd(60)
    draw.setheading(90)
    draw.fd(60)
    draw.setheading(0)
    draw.fd(120)
    draw.setheading(-90)
    draw.fd(60)
    draw.backward(60)
    draw.setheading(0)
    draw.fd(60)
    draw.setheading(-90)
    draw.fd(240)
    draw.setheading(180)
    draw.fd(60)
    draw.setheading(-90)
    draw.fd(60)
    draw.setheading(180)
    draw.fd(120)
    draw.setheading(90)
    draw.fd(60)
    draw.setheading(180)
    draw.fd(60)
    draw.setheading(90)
    draw.fd(60)
    draw.backward(60)
    draw.setheading(180)
    draw.fd(60)
    draw.penup()
    draw.setheading(0)
    draw.fd(300)
    draw.pendown()
    draw.setheading(-90)
    draw.fd(120)
    draw.setheading(180)
    draw.fd(120)
    draw.ht()
    
    userTurtle.penup()
    userTurtle.goto(-30,180)
    userTurtle.setheading(-90)
    
def mazeGame():
    scr.bgcolor("#0070ff")

def m1():
    userTurtle.setheading(90)
    userTurtle.fd(30)
    userTurtle.pos()
    print(userTurtle.pos())

def m2():
    userTurtle.setheading(180)
    userTurtle.fd(30)
    userTurtle.pos()
    print(userTurtle.pos())

def m3():
    userTurtle.setheading(360)
    userTurtle.fd(30)
    userTurtle.pos()
    print(userTurtle.pos())

def m4():
    userTurtle.setheading(-90)
    userTurtle.fd(30)
    userTurtle.pos()
    print(userTurtle.pos())

scr.onkeypress(m1, "Up")
scr.onkeypress(m2, "Left")
scr.onkeypress(m3, "Right")
scr.onkeypress(m4, "Down")
    
scr.listen()
        
drawMaze()
mazeGame()

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#56787

On Sun, 13 Oct 2013 15:18:27 -0700 (PDT), baujacob@gmail.com declaimed the
following:

>
>Sorry about that, I realized I forgot to include the code.
>So basically I have one turtle that draws the maze at the beginning and then another turtle(userTurtle) that completes the maze. When the userTurtle hits any point on the wall, I want to force userTurtle back to the start of the maze.

	Still seems rather harsh to me... After all, one of the common
suggestions for solving a maze is to "always follow [right/left] hand" (put
said hand on said wall -- walk keeping that hand in contact with the wall
-- if you hit a dead end, the 180 turn-around will pick up the other wall
and carry our around the branch that lead to that dead-end). But you are
postulating "hit a dead end, through out all progress, start over"

	Is "userTurtle" being guided by a real user? If so, resetting to the
start on each dead-end is a major penalty, the user should have the option
of back-tracking and picking another turn.

	If "userTurtle" is a separate algorithm it should still have a
back-track ability. The difference is whether the algorithm uses a wall
following scheme, or a random direction at any intersection. Note that,
without memorizing choices for each intersection, the random direction mode
can result in repeating a failed path.
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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#56830

On 13 October 2013 23:18,  <baujacob@gmail.com> wrote:
> import turtle
> userTurtle = turtle.Turtle()
> draw = turtle.Turtle()
> scr = turtle.Screen()
>
> def drawMaze():
>     draw.pencolor("gold")
[lots of lines]
>     print(userTurtle.pos())
>
> scr.onkeypress(m1, "Up")
> scr.onkeypress(m2, "Left")
> scr.onkeypress(m3, "Right")
> scr.onkeypress(m4, "Down")
>
> scr.listen()
>
> drawMaze()
> mazeGame()


You might realise that you don't actually have a "maze" in the sense
that you need something a *computer* can understand.

You need some data structure to hold the maze which you have drawn.

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