In my Ruby script, I simply want to prompt the user to select a point, and return that point to the program. Seems very simple yet I cannot find a simple answer.
What sort of prompt do you want and where? The typical way is Sketchup.set_status_text.
Sketchup.set_status_text would work just fine, the part I am unable to do is have a point return to my ruby script via mouse click
To to receive input events, you need to make your code into a Tool and handle the user input via (e.g.) onLButtonDown. Within the event callback, you use an InputPoint to identify what the user has clicked.
There are example Tool extensions in the Extension Warehouse, by the SketchUp Team.
You must copy, and change the topmost namespace module to your own unique module name*, and the inner module also if necessary, and then edit the code to your heart’s content.
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* … unless you leave and use the extension(s) as is .