find points within a brep

hi,

I have a pointcloud. Inside this pointcloud is a brep (in my chase a sphere) and I'd like to find out which points from the pointcloud are inside the brep.

There is a function called "closesd points". This is already similar to what i need, except that i would need a brep input instead a numer of points, or at least a radius in my chase.

Does anyone know how do make it happen?

Thanks in advance,

Nikolaus