Marks spans in the heightfield that intersect the specified rotated box area with the given area ID.
The center point of the box in world space [x, y, z]
Half extents of the box along each axis [x, y, z]
Rotation angle in radians around the Y axis
The area ID to assign to intersecting spans
The compact heightfield to mark
Marks spans in the heightfield that intersect the specified rotated box area with the given area ID.