Dan, Thanks I finally got it to work using the code you provided. Derek

thanks, great explanation. I'm guessing nothing in parametric.rb is actually specifically changed to work with windows.rb and it is the windows.rb script that utilizes the methods and variables in the parametric.rb script. i'll keep working at it

Transformations are still an enigma to me as well. But I just got a couple of books on vectors and transformations. ...but my right eye is still blurry after the operation so I can't concentrate on reading. Scariest of all is Observers. I wish you'd start using them more - so you could share my pain. (And join in on the rants )

You will need to create a tool class that lets you right click on a component. Then it should check that component to see if it is one of yours, probably by checking for an attribute_dictionary that should put on your special components. I'll write up a quick example of how to amke a tool that right clicks, Chris

@martinrinehart said: @scetchnscribble said: I'm looking for a few simple, but well written, examples to learn from. I'm looking for Ruby writers to test drive chapters 18 and 19: http://www.martinrinehart.com/models/tutorial/ Should get you from Ruby to checkboxes fast. I'll be looking at it - several of my scripts would benefit from web-dialogs and the ability to keep them open whilst you tweak stuff interactively... Later this week I'll try and feed-back...