crosses( $geometry , $geometry)
crosses( geomFromWKT( 'LINESTRING(3 5 , 4 4 , 5 3)' ) , geomFromWKT( 'LINESTRING(3 3 , 4 4 , 5 5)' )) → returns 1
crosses( geomFromWKT( 'POINT(4 5)' ) , geomFromWKT( 'LINESTRING(3 3 , 4 4 , 5 5)' )) → returns 0