Thank you for your answer, my goal is to obtain a 3D model from my 2D drawing in real time, knowing that the 3D shapes reassembly is done according to a curve that appears in all 3D shapes.

Hello,
I am new to this forum, I have some notions Java swings, I want to realize the 2D shapes and subsequently obtain the equivalent: (3D shape), with the aim to bring these 2D shapes (3D respectively) according to precise rules, and finally obtain a 3D model which is the equivalent 2D model ...