Dynamically adding Collision filtering on rigid bodies

[jchen114]

Hello,

For my purposes, I would like to be able to dynamically set when a rigid body should collide with another body. From what I've seen, the body has to be created with the desired collision filtering(?)

I'd like to change the body's collision flags depending on the scenario.

I've tried setting the collisionflags of the body to other values but it doesn't seem to work. The body is suspended and does not react to anything.

Thanks for the help.

[kermado]

You need to remove and re-add the rigid body to the world.

[veio]

We did this by inheriting from btCollisionDispatcher and overwriting needsCollision and needsResponse. And returning false or calling the base implementation whether a check is needed between two bodies or not.

[benelot]

We did this by inheriting from btCollisionDispatcher and overwriting needsCollision and needsResponse. And returning false or calling the base implementation whether a check is needed between two bodies or not.

Cool idea, I was also about to propose the readding option, but this one is way better to make it work properly. Especially because some people have high lags when they remove and readd larger/more complex objects just for this.