Creates regions for PxSceneDesc, from a global box.

This helper simply subdivides the given global box into a 2D grid of smaller boxes. Each one of those smaller boxes is a region of interest for the broadphase. There are nbSubdiv*nbSubdiv regions in the 2D grid. The function does not subdivide along the given up axis.

This is the simplest setup one can use with PxBroadPhaseType::eMBP. A more sophisticated setup would try to cover the game world with a non-uniform set of regions (i.e. not just a grid).

Parameters:

[out]	regions	Regions computed from the input global box
[in]	globalBounds	World-space box covering the game world
[in]	nbSubdiv	Grid subdivision level. The function will create nbSubdiv*nbSubdiv regions.
[in]	upAxis	Up axis (0 for X, 1 for Y, 2 for Z).

Returns:

number of regions written out to the 'regions' array

See also:

PxSceneDesc PxBroadPhaseType