This could be a useful feature but there would need to be a way of specifying which click and drag you want to drive which parameter and how. This could almost be another graph with each input representing a sequential drag and you can wire it into your actual plugin's graph. But it seems too convoluted that way.

For now I can do something basic like just making the first drag position the object in the viewport.

Would this list of positions be fed into a graph as input? If so, how would it know to stop using them after the creation process is done?

I was thinking more along the lines of a simple text file or Max script in addition to each graph which would allow to specify how to drive its parameters with each click. Like:

• Click1 -> Graph.Position
• Click2 * 2.0 -> Graph.Length
• Click3 + 5 -> Graph.Height

Don't know if its the best idea though