Re: [pygame] Newbie help : Platforms and collisions

[Peter Quade <peter@pqua.de>]

Hi,

On Samstag, Januar 4, 2003, at 09:59  Uhr, Fabrizio wrote:
> I have troubles in making my hero standing on the platforms; it 
> "sinks" in the platforms more or less deeply according to the hero and 
> to the platform positions.
This sounds like the following Problem:

Frame n: Your Hero is just above a Platform.
Frame n+1: The Hero has fallen several pixels between the frames, and 
is now "in" the platform. colliderect reports a hit.

The moment the Hero is just "on" the Platform is between frame n and 
frame n+1. One solution would be to move the Hero to a position where 
he stands correctly on the Platform when ever he hits a Platform.
Something like this:

> # check if hero is on a platform
>    flag = 0
>    for t in pl_list :
>       #print t.pos,hero.pos,t.pos.colliderect(hero.pos)
>       if t.pos.colliderect(hero.pos) == 1 :        
		 hero.pos.bottom = t.pos.top

>          hero.support = 1
>          flag = 1
>          if hero.s > 3 :
>          # if the jump is alraedy in the
>          #descending part then it
>          # stops jumping
>             hero.s = 0
>             j = 0
>          
>        
>    if flag == 0 :  
>    # hero is not on a platform 
>       hero.support = 0
>  
>    if hero.support == 0 and j == 0:
>    # hero has support and is not jumping
>       hero.fall()
>       hero.move()
>    elif j == 1 :
>    #hero is jumping
>       hero.jump(dir)
>    else :
>       hero.move()
>  
>  
> Thanks in advance for your help.
Hope it helps...

peter
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