public Matrix3x3 ReadMatrix3x3()
{
Matrix3x3 m;
m.A1 = this.ReadSingle();
m.A2 = this.ReadSingle();
m.A3 = this.ReadSingle();
m.B1 = this.ReadSingle();
m.B2 = this.ReadSingle();
m.B3 = this.ReadSingle();
m.C1 = this.ReadSingle();
m.C2 = this.ReadSingle();
m.C3 = this.ReadSingle();
return m;
}