B4J Question 3D Robotic with skeleton bone

I don't really get the question. Such models are generated with a 3D modeller like Blender.

MathiasM said:

I don't really get the question. Such models are generated with a 3D modeller like Blender.

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Ok, suppose I made the model by composing the robo with base + first arm + second arm + hand
How to draw the whole robot by imposing the constraints of the hinge between the base and the first arm + the first arm and the second arm and so on