rigid body rotation in 3 dimensions

you might also try posting, if not already done so, to... comp.soft-sys.matlab

There is a standard set of 9 equations for transforming coordinates - used in flt sims. You could search for them?

Brian W

Title: Summary of transformation equations and equations of motion used in free-flight and wind-tunnel data reduction and analysis [by] Thomas G. Gainer and Sherwood Hoffman. Publication info: Washington, Scientific and Technical Information Off., National Aeronautics and Space Administration; [for sale by the National Technical Information Service, Springfield, Va.]

1972. Physical description: ix, 119 p. illus. 27 cm. Series: NASA SP ; 3070 Series: NASA SP-3070 General note: "Prepared by Langley Research Center." Bibliography note: Bibliography: p. 99-101. Held by: CASI JOHNSON HQ LCCN: 73602190 //r85 Subject: Aerodynamic measurements. NASA Term: TRANSFORMATIONS (MATHEMATICS) NASA Term: WIND TUNNEL MODELS NASA Term: DATA REDUCTION NASA Term: EQUATIONS OF MOTION Personal author: Hoffman, Sherwood. Corporate author: Langley Research Center. Series: NASA SP ; 3070. ________________________________________________________ Ed Ruf Lifetime AMA# 344007 ( snipped-for-privacy@EdwardG.Ruf.com) See images taken with my CP-990/5700 & D70 at