//Moves the line
public void Move(clsLine l2)
{
X1 = X1 + l2.DX();
X2 = X2 + l2.DX();
Y1 = Y1 + l2.DY();
Y2 = Y2 + l2.DY();
}
public clsPoint DistanceAlongLine(double d)
{
clsLine l1 = default(clsLine);
l1 = Copy();
l1.Normalise();
return(new clsPoint(X1 + d * l1.DX(), Y1 + d * l1.DY()));
}
