Collision detection for many SceneNodes

[r2d2]

I played around with Irrlichts collisiondetection and noticed that creating CollisionResponseAnimators for every single SceneNode ist definitely not a good way for doing collision detection on many SceneNodes (100-200). Currently i just want to test wether the nodes collided with the world (Q3 Octree), but later on i will need a few more collision test cause of projectiles and stuff like that.

Is there an easier and especially faster way of doing that, while just using Irrlichts functions or do i have to write my own collision testing code (using simplyfied volumes for collision checks)? Or should ODE/Newton do the job (i doubt that they will be faster cause they are physics engines but i am not sure, perhaps any one else knows whether they are faster than the Irrlicht CollisionResponseAnimator).

thx 4 any help

greetz
r2

[Brainsaw]

I wouldn't use a phyiscs lib just for collision detection. I am using ODE, works fine (in most cases), but I haven't tried really big scenes yet. Initializing can take some time with lots of trimeshes. If you don't want to have the realistic behaviour of a physics engine I would stick to Irrlicht for collision detection.

[Mel]

Don't go literaly doing all the collision detection. Try distributing the space in cells, perhaps, and test the collisions you want to detect to the objects that are inside your cell. That saves up calculations.