question: boolean boundaryApproxEquals ( S2Polygon b , double maxError ) { if ( numLoops ( ) != b . numLoops ( ) ) { log . severe ( "!= loops: " + Integer . toString ( numLoops ( ) ) + " vs. " + Integer . toString ( b . numLoops ( ) ) ) ; return false ; } for ( int i = 0 ; i < numLoops ( ) ; ++ i ) { S2Loop aLoop = loop ( i ) ; boolean success = false ; for ( int j = 0 ; j < numLoops ( ) ; ++ j ) { S2Loop bLoop = b . loop ( j ) ; if ( bLoop . depth ( ) == aLoop . depth ( ) && bLoop . boundaryApproxEquals ( aLoop , maxError ) ) { success = true ; break ; } } if ( ! success ) { return false ; } } return true ; }
target:  Return true if two polygons have the same boundary except for vertex perturbations. Both polygons must have loops with the same cyclic vertex order and the same nesting hierarchy, but the vertex locations are allowed to differ by up to "max_error". Note: This method mostly useful only for testing purposes.