simply overlapping objects

[chris]

hey guys, this should be relatively easy but I cna't figure it out.

Basically I have a set of arbitrary points and a plane that I need to put within the field of points. The thing is, the user can select 3 points and the plane has to align itself with them.

as a simple solution I thought to draw a triangle (triangle_strip) connecting the points and then take it's rotation/position and apply it to the plane (which at this point has been created, just a bunch of triangle strips).

The thing is, is I can't figure out how to do that. I've been messing around with the orientation and rotation of various things and regardless of what I try nothing works. I've tried getting the objects euler, matrix, quat and axis angle, none of which have worked (and actually all are the same for the two objects, who are in two different initial positions and orientations).

So I'm not sure that I can grab the triangles rotation, as I haven't explicitly applied one to it yet. I was just wondering if I'm on the right track, or if I'm overlooking something extremely obvious.

Any help would be appreciated.
thanks