isWatertight
Indicates whether the mesh is “watertight”.
Declaration
final var isWatertight: Bool { get }Discussion
A mesh is watertight if the faces form a fully-closed volume (without gaps). A watertight mesh is required for bodies to be inflatable, and is also the reason why volume will only return a non-nil value for watertight meshes.
If you want your body to be inflatable (by setting inflationConstraint), the body mesh needs to be watertight.