How to make an editor for drawing a trajectory in 3D?

Question

Programming

The task is as follows:
1) The user loads the 3D model of the part into the editor and draws the trajectory of the machine.
The trajectory is divided into segments ABCDE-...-Z
2) For each segment, you can set some properties (the set of properties is dynamic)
3) This trajectory with the model enters our handler, which passes all this history to the API for working with the machine.
You can dig in three directions:
1) Use Autocad or similar software and write an extension for it
2) Take some component and put it in a Win32 form
3) Take Unity3D or an analogue and write an "editor" on the engine (there will be a question of supporting model formats)
What is easier? How is it better? What is the best component to use? Have you tried to implement something like this, how long can it take?

Answer 1

For visualization, the easiest way is to take the engine, with other options there will be too much fuss (lighting, camera control, interface with buttons). If we talk about Unity, a rough sketch can be done in a day, many popular formats are supported , there are plugins for more exotic ones.