Relative Rotation

[MisterRose]

I am looking for some greatly simplified code to handle the motion of a node. When I add a node it gets added to the origin and I see everything fine. I can set the rotation and everything behaves as expected.

What I would like to do is to take that node and rotate it relative to its current orientation. I understand that this involves some matrix math, and that this is built in to the engine, but I can't seem to find the magical incantation that works for my case.

Can anyone provide a simple snippet to rotate a node relative to its current heading?

Thanks in advance,

[blAaarg]

vector3df::getHorizontalAngle()

The API has the description and example code in it.