function getAccessibleCells(v,cell){

	var neighbours = [] ;
	var new_neighbours = [cell] ;
	var temp_neighbours = [] ;

	for(var i=0;i<=v;i++){
		for (var neighbour in new_neighbours){
			var vx = getCellX(neighbour) ;
			var vy = getCellY(neighbour) ;

			if((neighbours_cache[neighbour]&8) == 0){
				var sub_cell = getCellFromXY(vx-1, vy) ;
				if (sub_cell != null){
					push(temp_neighbours, sub_cell) ;
				}
			}

			if((neighbours_cache[neighbour]&4) == 0){
				var sub_cell = getCellFromXY(vx, vy-1) ;
				if (sub_cell != null){
					push(temp_neighbours, sub_cell) ;
				}
			}

			if((neighbours_cache[neighbour]&2) == 0){
				var sub_cell = getCellFromXY(vx+1, vy) ;
				if (sub_cell != null){
					push(temp_neighbours, sub_cell) ;
				}
			}

			if((neighbours_cache[neighbour]&1) == 0){
				var sub_cell = getCellFromXY(vx, vy+1) ;
				if (sub_cell != null){
					push(temp_neighbours, sub_cell) ;
				}
			}
		}
		pushAll(neighbours, new_neighbours) ;
		new_neighbours = temp_neighbours ;
		temp_neighbours = [] ;
	}

	return neighbours ;

}