The AABB defining the boundaries of the fluid.
The velocity of the fluid flow, which pushes objects inside it.
The density of the fluid. Higher density = more buoyancy. (1.0 = normal water)
How much the fluid slows down objects moving through it (linear and angular damping). Lower value = more drag.
Represents a volume of fluid in the physics simulation. Objects entering this volume will experience buoyancy (upward force) and drag (velocity damping).