hMatrix.m11 = h22;
hMatrix.m12 = h23;
hMatrix.m20 = h13; // h31 = h13
hMatrix.m21 = h23; // h32 = h22
hMatrix.m22 = h33;
hMatrix.invert();
Point3d check = new Point3d(b1, b2, b3);
hMatrix.transform(check);
System.err.println("check point = " + check.x+" " +
check.y+" " + check.z);