public double sqrDistance(Envelope2D other)
	{
		double dx = 0;
		double dy = 0;
		double nn;

		nn = xmin - other.xmax;
		if (nn > dx)
			dx = nn;

		nn = ymin - other.ymax;
		if (nn > dy)
			dy = nn;

		nn = other.xmin - xmax;
		if (nn > dx)
			dx = nn;

		nn = other.ymin - ymax;
		if (nn > dy)
			dy = nn;

		return dx * dx + dy * dy;
	}
public double sqrDistance ( Envelope2D other ) { double dx = 0 ; double dy = 0 ; double nn ; nn = xmin - other . xmax ; if ( nn > dx ) dx = nn ; nn = ymin - other . ymax ; if ( nn > dy ) dy = nn ; nn = other . xmin - xmax ; if ( nn > dx ) dx = nn ; nn = other . ymin - ymax ; if ( nn > dy ) dy = nn ; return dx * dx + dy * dy ; }
Calculates minimum squared distance from this envelope to the other.
Returns 0 for empty envelopes.
@param other The other envelope.
@return Returns the squared distance