Buoyant Objects
Simulate buoyant objects =
Some useful info about buoyancy simulation with ODE can be found at: http://www.cambrianlabs.com/Mattias/DelphiODE/BuoyancyParticles.asp
Objects are approximated with spheres. There seems to be no sourcecode available (in this demo, but is avaliable in complete package-Downloads section- for Delphi_GLScene programers).
There were multiple approaches to buoyancy simulations presented in ODE mailing list.