RLMESH_BOX_OPTIONS_INIT
Box(low, high, shape, dtype). (-inf, inf) is unbounded for any dtype; on an integer or bool dtype finite bounds are stored exactly and must be whole numbers (0.5 is RLMESH_ERR_INVALID_ARGUMENT); NaN is refused.
#define RLMESH_BOX_OPTIONS_INIT { sizeof (
RLMeshBoxOptions
) , RLMESH_DTYPE_FLOAT32 , 0 }