Hi Tudor, sorry it's not clear to me what you're trying to do.

If it's something like transforming the coordinates of a point in global x,y,z coordinates into coordinates relative to a frame, that would be like this:

var local_x = frame.distancex( pt );
var local_y = frame.distancey( pt );
var local_z = frame.distancez( pt );

The .distancex, .distancey, and .distancez functions on a coordinate frame return the distance of a point in world coordinates along the x, y, or z axis direction planes of the frame.

If that's not it then I need a clearer description of what you're trying to do, it's hard to figure out what you're asking about if you don't provide some more details.

- Michael