In order to provide for generic reference of these files from your C:\Program Files\Macromedia\Flash MX\Configuration\Include folder, I've left the version information off the file names, only to be found here and in the header information. These are the latest versions available for download: ///////////////////////////////////////////////////// BitwiseOperationsClass.as - v1.1 - August 7, 2003 ColorToolkit.as - v1.2 - October 29, 2002 ComplexNumberClass.as - v1.0 - August 1, 2003 Intersection2DClass.as - v1.0 - August 1, 2003 MathEasingEquations.as - v1.5 - May 1, 2003 MathEval.as - v1.0 - August 16, 2003 MathExtensions.as - v2.2 - August 16, 2003 Matrix3x3Class.as - v1.0 - August 1, 2003 PerlinNoiseClass.as - v1.0 - August 1, 2003 Point2DClass.as - v1.0 - August 1, 2003 PolynomialClass.as - v1.1 - August 14, 2003 QuaternionClass.as - v1.0 - August 1, 2003 Vector2DClass.as - v1.0 - August 1, 2003 Vector3DClass.as - v1.0 - August 1, 2003 ///////////////////////////////////////////////////// Disclaimer: These class libraries are developed from files made freely available by their authors, and they are available for your use in any capacity. Please retain all header/copyright information as is; you may add your pertinent copyright information for any function additions you add. If you do make substantial additions, I would appreciate reciprocation by sending a copy of the altered file to me. Richard Wright Wright Internet Solutions wisolutions2002@shaw.ca