Hello everybody,

I know these are basic Math questions but my 3D Math Knowledge is far far away…

I’m currently looking into tutorial on the web,

but a little help to complete this would be welcome.

So, here are my questions :

- I read that a quaternion is very handy in 3D since it could contain a direction vector.

as in JME a node got a local rotation which is a quaternion, does a node have a direction vector ?

if yes, how could we retrieve it ?

- It seems that to have an angle between two vectors a cross (or dot ?) product will give me the information, is there an easy way to obtain this result with the jme api ?

- is there a way to rotate a mesh without a node or must we attach the mesh to node and rotate the node ?

Thanks in advance for the answers,

Bye,

Adenthar.