Bin Packing with custom constraints

[caiqi]

I would like to build a 3D bin packing model but did not find a good solution with OR-TOOLS. The requirements is:

1. Given a set of N 3D boxes, place them one-by-one into a fixed size container.
2. At each step of placing, a physical simulation engine needs to check the stability of current packed boxes. The simulation engine is third-part and can not be modified. It receives current packing configuration (i.e, x,y,z position of each item) and return a bool value indicating stability.
3. I have checked the bin packing example in OR-TOOLS. Current setting is different in that I need to check stability at each timestep, that is, placing two boxes on a seesaw simultaneously may satisfy the stability constraint but placing them one-by-one will not pass the stability check.

I have built a 3D bin packing model without considering stability and packing order with OR-TOOLS. However, from my understanding, the above requirements need sequential decision with custom third-part constraint. Is there any reference to build such a model in OR-TOOLS? Great thanks!