getEdge method

@override HalfEdge? getEdge(int i)

Implementation

@override
	HalfEdge? getEdge(int i ) {
		HalfEdge? edge = this.edge;

		while ( i > 0 ) {
			edge = edge?.next;
			i --;
		}

		while ( i < 0 ) {
			edge = edge?.prev;
			i ++;
		}

		return edge;
	}