hello.
I'm still studing the bsp and other space partitioning tecniques In a book on math (before testing all the opengl or directx I would understand math)I not understand:
1)the partitioning of the space must be done as preprocessing?because i read that is too complicated and computationally heavy for do it at runtime.
2)if the first question is true , how an engine preprocessing tool can do this?
I read that collect all the convexes objects?
why(i would understand)?
next .there are some tool for do this?

thanks