namespace Chaos { enum ESimCallbackOptions { Presimulate = 1 << 0, MidPhaseModification = 1 << 1, CCDModification = 1 << 2, ContactModification = 1 << 3, StrainModification = 1 << 5, ParticleRegister = 1 << 6, ParticleUnregister = 1 << 7, RunOnFrozenGameThread = 1 << 8, Rewind = 1 << 9, } }