These rotations are funny

[Kalphiter]

When doing an brown townysis of a vehicle facing 4 different directions, I got funny results:

Code: [Select]

North: 1 0 0  0
South: 0 0 1  180
West:  0 0 -1 90
East:  0 0 1  90
Why would north have a 1?

Why does west have a -1? Wouldn't that mean south should have a -1 being it's going negative on a graph?

I do understand the final parameters.

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[Randy]

The first three numbers represent a vector, and the 4th the the rotation about that vector.
ie. 0 0 1 180 is a rotation of 180 degrees about the z axis.

http://en.wikipedia.org/wiki/Axis_angle