人们如何使用Python中的字符串列表在游戏中创建关卡

Question

i would like to know because i am making games in pygame and would like to use this method because it looks neat and tidy.

EXE

level = "WWWWWWWW" \
        "WSSSSSSW" \
        "WSSSSSSW" \
        "WSSSSSSW" \
        "WSSSSSSW" \
        "WWWWWWWW"

Here the s's are empty space and the w's are blocks

Answer 1

If you use that method, you will need to define the dimensions of the level - LEVELWIDTH and LEVELHEIGHT, in this case 8 and 6, then you can find the block at x, y with this code:

LEVELWIDTH = 8
LEVELHEIGHT = 6

def GetBlock(x, y): 
    return level[x * LEVELWIDTH + y]

remembering that the indexes x and y both start at zero and end with the last item at the index length - 1 because of Python's method of indexing.

Here is a different method I have used in situations like this:

level = ['WWWWWWWW',
         'WSSSSSSW',
         'WSSSSSSW',
         'WSSSSSSW',
         'WSSSSSSW',
         'WWWWWWWW']

with this method all you need to do to find what block is at (x, y) is:

level[x][y]

but remember if you want to be able to edit the level, you need to create a new string for each row you edit, because you cant assign items to a string. Eg: To set the block at x, y with the string new:

level[y] = level[x][:y] + new + level[x][y+1:]

See https://docs.python.org/3/tutorial/introduction.html#strings for more information on indexing the method I have shown is based off of the examples in this book http://inventwithpython.com/pygame/ and a good example of levels in use in the book is in chapter 9 - Star Pusher