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Python pygame collision

  • 16-06-2013 5:50pm
    #1
    Troxck
    Closed Accounts Posts: 1,386 ✭✭✭


    Okay so I want to make a basic game and so far I have he character moving corresponding to the keys but the problem is it goes past the windows, how do I stop this? I don't know how to do the collision detection in Python and any help would be amazing.
    bif="bg.jpg"
mif="man.png"

import pygame, sys
from pygame.locals import *

pygame.init()
screen=pygame.display.set_mode((1109,630),0,32)



background=pygame.image.load(bif).convert()
mouse_c=pygame.image.load(mif).convert_alpha()

x,y=0,400
movex, movey=0,0

while True:



    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        if event.type==KEYDOWN:
            if event.key==K_LEFT:
                movex=-10
            elif event.key==K_RIGHT:
                movex=+10
            elif event.key==K_UP:
                movey=-10
            elif event.key==K_DOWN:
                movey=+10
        if event.type==KEYUP:
            if event.key==K_LEFT:
                movex=0
            elif event.key==K_RIGHT:
                movex=0
            elif event.key==K_UP:
                movey=0
            elif event.key==K_DOWN:
                movey=0

        

        x+=movex
        y+=movey

        screen.blit(background,(0,0))
        screen.blit(mouse_c,(x,y))

        

        pygame.display.update()


Comments

  • #2
    duffman85
    Registered Users, Registered Users 2 Posts: 339 ✭✭duffman85


    Check if x + movex > width of the window or less than 0.
    set x to the width or 0 depending on which condition is true.
    Do a similar check on y.


  • #3
    Troxck
    Closed Accounts Posts: 1,386 ✭✭✭Troxck


    duffman85 wrote: »
    Check if x + movex > width of the window or less than 0.
    set x to the width or 0 depending on which condition is true.
    Do a similar check on y.

    When I do 
    x+movex>0
y+movey>0
    My character moves only forward and down but still goes past the boundaries of the window.

    When I do 
    x+movex>659
y+movey>659
    My character does not move at all/

    I'm probably doing something wrong, sorry to be bothering you


  • #4
    Mo14
    Registered Users, Registered Users 2 Posts: 341 ✭✭Mo14


    Troxck wrote: »
    When I do 
    x+movex>0
y+movey>0
    My character moves only forward and down but still goes past the boundaries of the window.

    When I do 
    x+movex>659
y+movey>659
    My character does not move at all/

    I'm probably doing something wrong, sorry to be bothering you
    You want to move the character when x + movex is less than the window size.

    So what you'll have is something like: 
    if x + movex > 0 and x + movex < 659:
    x+=movex
    Also, good practice would be to use 
    screen.get_size()
    to get the width and height of the screen instead of using number values.


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