Hi,

I want to make an interactive tools just like Bones Tool to tweak bones with my own rule. Can this do in python or must do in HDK?

Thanks!

depending on what you want to do, you may be able to just use python. If all that you are doing, for example, is asking the user to draw a curve, then waiting for them to press a button to trigger another action, you should be able to do it all on python. If you want to parse a selection, or trigger selection context actions, you can also look at hou.SceneViewer class

I believe you would use the HDK if you wanted, for example, to make your own screen widgets or things of the sort.. (in addition to maybe access to some additional commands)

Using curve is a great idea. Thank you!