lllSitTarget relative rotation

I would like to set a prim so that no mater what the rotation of the prim on the x axis (i.e. up to 45 deg), when an AV sits on it they are upright - not at 45 deg also. I don't need to update this once the AV is seated - rotations will not change after the AV sits. Is this a case for UpdateSitTarget? The WIKI article on this subject is very confusing. Perhaps I'm looking in the wrong direction...

Agan...
Thanks in advance for the help

The llSitTarget is confusing because it does not work right
Read about my confusion and how I was helped in this thread:
/54/09/242119/1.html

The Hero that finally helped me out has his solution here:
/54/6a/153963/1.html

You can copy the scripts from that location or get them in world for free at his shop

Happy scripting

Thanks Dora, that clears up the issue with the bug nicely.

What I'm trying to do still is sit on a target that could be in any random rotation but always have the AV in an upright position. How do you get a sit rotation on a prim that is relative to the region? I'm only concerned with the AV being perpendicular to the ground on the x axis in this case. The prim will not rotate after the AV sits. How do you apply a sit with a rotation relative to the region on an object? (I think that is my question).

You'll probably have to do this on a timer, and it'll look something like:

adjustSitTarget(vector relativePos, rotation absoluteRot)
{
   rotation relativeRot = absoluteRot/llGetRot();
   llSitTarget(relativePos, relativeRot);
}

Not sure whether you also want the avatar to always be facing in the same horizontal direction (e.g. always to the East or whatever), so I didn't show an example of calculating 'absoluteRot'.

Now I understand your question
Cut from a simple tele porter script:

rotation my_rot=llGetRot();
llSitTarget((target - llGetPos()) / my_rot  ,  ZERO_ROTATION / my_rot);

Doing this your AV will always sit upright no matter how your TP prim is rotated.
target is the sit position in global coordinates, so "target - llGetPos()" is the relative "not rotated" sit position.