question: public BlockTransformExtent ( Extent extent , Transform transform , BlockRegistry blockRegistry ) { super ( extent ) ; checkNotNull ( transform ) ; checkNotNull ( blockRegistry ) ; this . transform = transform ; this . blockRegistry = blockRegistry ; BLOCK_TRANSFORM = new BaseBlock [ FaweCache . CACHE_BLOCK . length ] ; BLOCK_TRANSFORM_INVERSE = new BaseBlock [ FaweCache . CACHE_BLOCK . length ] ; Transform inverse = transform . inverse ( ) ; for ( int i = 0 ; i < BLOCK_TRANSFORM . length ; i ++ ) { BaseBlock block = FaweCache . CACHE_BLOCK [ i ] ; if ( block != null ) { BLOCK_TRANSFORM [ i ] = transform ( new BaseBlock ( block ) , transform , blockRegistry ) ; BLOCK_TRANSFORM_INVERSE [ i ] = transform ( new BaseBlock ( block ) , inverse , blockRegistry ) ; } } }
target:  Create a new instance.