This is just another cloth animation... my apologies    :-)

I lowered the stiffness to a minimum of 1. This rubber sheet consists of
150x150 atoms (149x149x2 triangles). The total atom-atom spring amount is
221710. I put three spheres in the scene, since I haven't found the time to
work more on the system today. The higher quality animations are available
at http://geitenkaas.dns2go.com/experiments/. (Cloth06test3)

As you can see in the higher quality animations the sheet is trembling a
bit. This is caused by the inherent instability of the forward-Euler
algorithm that my system uses.
There are a few different ways to minimize this instability:
 1. Smaller timesteps (now: 0.0001)--> more steps needed per animation frame
(now: 80).
 2. More force dampening (now: 0.997). Each timestep the velocities of the
atoms are multiplied by a value to simulate energy loss (by internal
friction). The lower the DAMPING value, the more stable the system becomes
and the less interesting the movements become.
 3. Using another algorithm instead of Forward-Euler like Inherent Euler or
Leap-Frog.

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Attachments:
Download 'cloth06test3_small.mpg' (439 KB)