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Re^2: What Perl CAN'T do?

by hardburn (Abbot)
on Dec 14, 2005 at 20:13 UTC ( #516748=note: print w/replies, xml ) Need Help??

in reply to Re: What Perl CAN'T do?
in thread What Perl CAN'T do?

a 3D shooter like quake wouldn't give enough frames per second to be comfortable enough on a common PC

If it was limited to using the CPU only, the recent Quake games couldn't work in C/ASM, either. You have to offload operations to dedicated 3D hardware to get Quake-level graphics. You need underlieing library support to take advantage of GPUs, which Perl has.

In the game I've been writing in Perl (2d sprites, not 3d), the biggest CPU-hog is collision detection. I'm using a rather naive algorithim (every object tested against every other object), so it does a lot more work than it needs to. With offloading some of the calculations into C code, the game is playable on my 2.2 GHz Celeron laptop (but only just so in some spots). In pure Perl, it's easily playable on my Athlon64 3200+ (2.0 GHz) desktop.

Fortunately, collision detection shouldn't be difficult to paralleize (at least from what I've seen so far), so this is an area that can take advantage of multicore processors. Also, there has been some research on using GPUs for collisions.

"There is no shame in being self-taught, only in not trying to learn in the first place." -- Atrus, Myst: The Book of D'ni.

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Re^3: What Perl CAN'T do?
by jplindstrom (Monsignor) on Dec 15, 2005 at 03:41 UTC
    One very simple way to optimize collision detection is to sort the objects by pos.x (or y) first. Now you know a lot more about which objects are in proximity.

    I'm sure there are really clever rocket science grade algorithms for this too :)


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