mutual Interaction between FLIP fluid or rigid body

Relationships are a special type of data that describe which objects affect which other objects. The important thing to remember about relationships is that they take time to calculate, so to optimize the simulation, you should only create relationships between objects that really need to interact, and you should look for ways to use oneway relationships (where one object affects another but not the other way around) instead of mutual relationships (where two objects affect each other). Of course in the r