Thanks claudio, works great now!
On Sun, Sep 19, 2010 at 1:22 AM, claudio canepa <ccanep...@gmail.com> wrote:
>
>
> On Sun, Sep 19, 2010 at 5:08 AM, kevin hayes <kevino...@gmail.com> wrote:
>
>> Hi, I'm just beginning to learn python and pygame. I've gone through the
>> first four chapters of "Game Programming, The L-line, the Express Line to
>> Learning. Right now I'm working on an exercise that asks me to "make a box
>> that moves in a diagonal path. Can someone tell me why when I run the code
>> the program only executes while I move the mouse? Also, can you tell me how
>> i can change my code to avoid this? Thanks, Kevin
>>
>> here is my code:
>>
>> import pygame
>> pygame.init()
>>
>> screen = pygame.display.set_mode((640, 480))
>> pygame.display.set_caption("Diagonal Red Square")
>>
>> background = pygame.Surface(screen.get_size())
>> background = background.convert()
>> background.fill((0, 0, 0))
>>
>> box = pygame.Surface((20, 20))
>> box = box.convert()
>> box.fill((255, 0, 0))
>>
>> box_x = 0 #box variable for the x-axis
>> box_y = 0 #" " y-axis
>>
>> clock = pygame.time.Clock()
>> keepGoing = True
>>
>> while keepGoing:
>> clock.tick(30)
>> for event in pygame.event.get():
>> if event.type == pygame.QUIT:
>> keepGoing = False
>>
>> box_x += 5
>> box_y += 5
>>
>> if box_y > screen.get_height(): #checking for screen boundaries
>> box_y = 0
>> if box_x > screen.get_width():
>> box_x = 0
>>
>>
>> screen.blit(background, (0, 0))
>> screen.blit(box, (box_x, box_y))
>> pygame.display.flip()
>>
>> pygame.quit()
>>
>
> You change the box position only if an event is present, so you need to
> move the mouse or press keys to move.
>
> Move out of the event loop the lines that change the position, that is,
> dedent one level the lines:
> box_x += ...
> box_y += ...
>
> --
> claudio
>
>
>
