Camera and Transform Matrices in Papervision3D

I've had some troubles to fully understand the matrices system in Papervision3D: between the view matrix, the transform, the camera eye, etc, etc...
But I think I've got it now. All you need to know in order to make transformations between world and camera coordinate systems is this formula:

o.view = camera.eye * o.transform

In other words, any DisplayObject3D o has a transform matrix that represents its transformation in the world coordinate system. It also has a view matrix that represents its transformation in the camera coordinate system. The camera's eye matrix allows to pass from the world to the camera coordinate system. In papervision3D:

o.view.calculateMultiply(camera.eye, o.transform);

will compute your object's updated view matrix. In the other direction:

o.transform.calculateMultiply( invEye, o.view);

will update the object's transform according to its view matrix. Note that invEye is the inverse of camera.eye.

One last piece of advice: I've noticed that modifying a view matrix alone doesn't change anything. If you modify the view, you need to update the transform according to the second formula.