How to write your own 3D editor in C ++ - like a very short 3DMax? Or are there open source ones?

Question

3D

Good afternoon!
I want to write my own 2D + 3D editor - more precisely, it will be a computational grid generator, but I will come up with the generation of grids myself, and at the first stage you need to draw and join two-three-dimensional elements. It's clear that such programs are ready-made - but they a) do not suit the capabilities, i.e. uncomfortable b) it must be built into another system and have feedback. Therefore, mine is better. Actually, I only need geometry, lighting is not needed.
Probably there are some frameworks and libraries that everyone uses. Yes, there is literature on the subject. Pliz, poke the nose of an illiterate person. And then Google gives out like a lot of things - but the guru's advice is desirable - like don't go there, go here. I will write everything in C / C ++ - the calculation modules are written in it.

Answer 1

For geometry - you can read this course .
To write a GUI, use Qt.
Why don't you like the components from FreeFem++?

Answer 2

It's easier to implement an addon for www.blender.org
www.blender.org/api/blender_python_api_2_73_5/info...

Answer 3

You described a typical spherical problem in the vacuum of our IT: "I need a super-cool programmer who will give a shit about everything and will only sit with me to show how to do cool things." There are none. Wangyu, that in a month questions like: "I downloaded 100 observer factories from the Internet, and they slow down! Help telepaths!"
opensourceecology.org/wiki/CAD_tools