How can I create a point and an orient constrain in Houdini?

Trying to find direct conversions from a Maya workflow to a Houdini workflow will lead to nothing but headaches. Instead of asking really specfic questions like the one above, try to be a bit more general and explain what you are trying to do. A lot of us here don't have any Maya experience, which means we don't know what a point or orient constraint do.

Wolfwood
Trying to find direct conversions from a Maya workflow to a Houdini workflow will lead to nothing but headaches. Instead of asking really specfic questions like the one above, try to be a bit more general and explain what you are trying to do. A lot of us here don't have any Maya experience, which means we don't know what a point or orient constraint do.

Okay, I need to pipe the orientation of a cluster of components (one or more vertices, edges, faces or CVs) in world space into the orientation of another object.

If you want to deform a set of points using objects in world space then that sounds like a job for Bones/Meta-balls. You should also investigate the Lattice SOP.

Wolfwood
If you want to deform a set of points using objects in world space then that sounds like a job for Bones/Meta-balls. You should also investigate the Lattice SOP.

I don't want to deform a set of components. I want to align (constrain) an object to a set of components.

Rivet

There's also some info here:
http://www.odforce.net/wiki/index.php/Constraints [odforce.net]

Feel free to update the wiki.