[ODE] AutoDisable

[Hannes Norda]

Yes I also use the collide/categorybits to cull collisions.

The collide bit test happens before the AABB collision tests, so this
is the earliest escape possible I guess. Really good performance boost
if you got lots of geoms that never should collide.

(And sorry Jon, didn't notice I sent this only to you and not to the list ;)


On Sun, 19 Dec 2004 11:18:09 -0800, Jon Watte <hplus-ode at mindcontrol.org> wrote:
> 
> To "early out" I find it's easier to give all terrain-like things a specific collider bit, and make them collide against all other bits than that bit. That way, ODE earlies out for me and I have to write and debug less code.
> 
> Cheers,
> 
>                         / h+
> 
> 
> -----Original Message-----
> From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf Of Tim
> Rightnour
> Sent: Saturday, December 18, 2004 10:41 PM
> To: Tyler Streeter
> Cc: ode at q12.org
> Subject: Re: [ODE] AutoDisable
> 
> On 17-Dec-2004 Tyler Streeter wrote:
> > Are there any other cases people check to jump out of collision checks early?
> 
> I use the terrain contrib, and divide my world into smaller 256x256 terrains.
> Since they are literally stacked edge to edge, I early out on any collision
> between two terrains.  I also bound my world with planes, to keep the creatures
> from falling off the earth.  I early out any collisions between a plane and the
> terrain.  Another thing I do is anchor certain objects to the ground, such as
> trees, so they don't wander off.  Those objects early out on any collisions
> between them and the terrian.
> 
> ---
> Tim Rightnour <root at garbled.net>
> NetBSD: Free multi-architecture OS http://www.netbsd.org/
> Genecys: Open Source 3D MMORPG: http://www.genecys.org/
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