All you need to know is the meaning of the 4 values.
A quaternion is made of 4 values (x, y, z, w) .
To define a rotation around a unitary vector u, for example (0,1,0) =>Y axis,
and an rotation w=60º, your code should look something like this.
x = u(x) * sin(w / 2) = 0
y = u(y) * sin(w / 2) = 0.5
z = u(z) * sin(w / 2) = 0
w = cos(w / 2) = 0.8660...
Take a look at the RotPosPathApp example in the Getting Started tutorial from
SUN.
I know it's hard to figure out how it works, someone told me too (gracias
Dani).
Siau Tan Long wrote:
> How to use quaternion to do rotation about an arbitrary axis in Java3D?
> e.g: Quat4f
>
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