Quick rotation question for y'all.

Hey everyone, I have a question question for you...

Let's say I want to "horizontalize" a rotation- how would I get that? That is, if I have a rotation, and I want to keep pointing in the same direction on the XY plane, and make the rotational vector parallel to the XY plane, how would I go about doing that?

Thanks guys.

If worst comes to worst I guess I can bisect this by changing the Z axis of a <0,0,0> rotation and minimizing the angle between the... angles.

there are functions to take a rotation and turn it into a vector pointing in the direction of rotation (llRot2Euler I think). You could covert to euler, set vector.z to zero, then convert back to rotation using llEuler2Rot. You may be able to manipulate the rotation directly if you understand quaternions, I don't .

I _think_ that is what you are getting at?

you can align one of the axis of an object with a direction of choice using llRotLookAt()

this codesnippet might is a lot usefull for that, look:]

rotation getRotToPointAxisAt(vector axis, vector target) {
return llGetRot() * llRotBetween(llVecNorm(axis * llGetRot()), llVecNorm(target - llGetPos()));
}

llRotLookAt(getRotToPointAxisAt(AXIS_FWD, target), strength, damping);

I am not sure what you are getting at. Perhaps give an example in specific terms, such as

...a bird is level pointing in some direction. What rotation do I need to get it to point 25 degrees to the left while still being level?