[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [pygame] Firing bullets

I absolutely have profiled using lists and creating/destroying
instances.  Using freelists is always faster if you have enough RAM.
This amount of RAM is well within reasonable limits.  I always develop
for low-end machines, so my minspecs are usually tiny.
Recycling is not particularly difficult if you use a factory.
EX.

def fireBullet(mVector):
     if returnVal = unfiredBullets.pop():
        return returnVal
     else:
        return Bullet(mVector) # produces a new Bullet object

On 4/7/07, Greg Ewing <greg.ewing@xxxxxxxxxxxxxxxx> wrote: 
Kris Schnee wrote:

> I'm not
> sure that the recycling method is really necessary, if you find it hard
> to program. (It's probably not hard; just laziness on my part that I
> didn't use it.)

I suggest measuring before concluding that keeping a
free list is faster. It might not be.

> -Is it worth using ODE physics for bullets? ... But you'd also have the
 > overhead of constantly being notified about bullet-on-bullet collisions,

Not necessarily. ODE geoms can have a bitmask that
determines what categories of objects collide with
others. So you could easily arrange for bullets to
collide e.g. with players and walls but not with
each other.

--
Greg



--
Andrew Ulysses Baker
"failrate"