I’ve finally got the physics to work. I explain, this is not a boring fish tank where the fishes and moving from left to right. It is a true emulation of a real fish tank. That means that the plants must move the way they should, etc… moving the plants along the water current is not simple.

So here is what I’ve done so far :

- each objects has physics properties, collide and are deformable.

- the bubbles collide as well and bounce or are stopped by a fish or a plant.

- Plants are moving like real plants, that means that they do not have a looped animation, but they are animated at vertex level, so they can move always differently depending on the water.

- The star fish is functional, he is deformable, can bounce and some time try to move… it is quite stupid.

- The tank is 3 time larger than the iPhone screen so we can scroll from left to right.

- Camera can follow any element (like a fish).