Rope that can be in water

[josemendez]

I made a game with an ocean and a whole physical system associated with it.

Is it possible to add forces on given particles in a rope ? That way I could identify the particles under water and add resistance force to them.

Yes, you can add forces to individual particles, and get/set any particle property. See:
http://obi.virtualmethodstudio.com/manua...icles.html

You can also retrieve contact data and make spatial queries such as raycasts, box overlaps, etc:
http://obi.virtualmethodstudio.com/manua...sions.html
http://obi.virtualmethodstudio.com/manua...eries.html