3D Cartesian Coordinate Rotation

[ziziran]

3D Cartesian Coordinate Rotation (Direction) VI, has a input  "rotation matrix type", I can not understand the Direction Angles. when I use the defaut, it is wrong.

[altenbach]

• If you say something is wrong, tell us why and what result you expect instead.
• rotating a [0,0,0] point with give you a [0,0,0] result, no matter how you rotate.

[LLindenbauer]

The Inputs of the "3D Cartesian Coordinate Rotation (Direction)" VI are explained in the documentation, e.g. here: https://www.ni.com/docs/en-US/bundle/labview-api-ref/page/vi-lib/analysis/coordinate-llb/3d-cartesia...

The three arrays to the top left are your points. Enter some coordinates other than [0, 0, 0] to see the effect of the rotation.

Also, please use a smaller font.

[altenbach]

Your matrix is not a matrix of directional cosines because the determinant of it is not unity. 

(You only have three degrees of freedom, so you cannot chose 9 random values. they are interdependent. How did you generate the matrix?)