Datasets:
Request for simulation code or multi-object contact handling details
Hello, thank you for releasing the MOSIV dataset. I have a question about the reproducibility of the physical simulation used to generate MOSIV.
The metadata and the paper provide the ballistic initialization parameters and single-material constitutive laws, including initial locations, initial velocities, gravity, dt, and collide_time. However, accurately re-implementing the simulation and system identification also seems to require the multi-object collision/contact handling algorithm, which I could not find described in detail in the paper.
Could you clarify whether the simulation code will be released? If a full release is not planned, would it be possible to provide more details or pseudocode for the multi-object contact handling algorithm?
In particular, it would be very helpful to know:
- how object-object contact is detected and resolved;
- whether contact is handled through MPM grid interactions or another method;
- whether friction, restitution, adhesion, or material-pair-specific contact parameters are used;
- how boundary/floor contact is handled;
- whether all objects are simulated jointly in one MPM domain or separately with additional coupling;
- any important solver details needed to reproduce the trajectories, such as APIC/PIC/FLIP choices, damping, grid resolution, particle size, and substep settings.
The paper and metadata provide enough information to reconstruct the ballistic initialization, but accurate trajectory reproduction appears to require the above multi-object contact/collision details. Any guidance, code release timeline, or minimal reference implementation would be greatly appreciated.