Re: [pygame] Function for keyboard movement

[Noel Garwick <noel.garwick@xxxxxxxxx>]

Hi Bob,

There are a lot of ways to do it..

In the past, I've used something like this for teaching basic movement:

• Store time since previous frame
• Poll for events
• Update held keys
• If movement key held,
• set movement/direction flag for player sprite
• Update sprite ai based on time since previous frame
• if movement/direction flag on
• generate a rect for the proposed new location
• see if the new location only includes non-blocked tiles (background collision)
• If it doesn't, this is our sprite's new rect
• If it does, either
• do nothing (very basic) or
• move to the edge of the original position

This should work fine for objects that won't move fast enough to cover more than a tile per frame..

Is that what you were looking for? Or something even more abstracted like..

while True:

  tts = fpcClock.tick( FPS )

  held_keys = update_keys()

  draw_background()

  update_sprites( tts, held_keys )

  draw_sprites()

  pygame.display.update()

Thank you,

Noel

On Tue, Oct 6, 2015 at 4:12 PM, Bob Irving <bobirv@xxxxxxxxx> wrote:

Hi folks,

We're introducing Python for 9th grade this year and moving from Blitz Basic for game programming. Just wondering if anyone has come up with a way to hide the complexity for keyboard movement..... it's one of those things that makes sense to more advanced programmers but not to beginners. We've experimented with making a few functions to detect collisions, mouse clicks....

TIA,

Bob Irving

Porter-Gaud School

Charleston, SC

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Twitter: @birv2

www.bob-irving.com

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