It turns out that cloth simulation is harder and thus more interesting than I imagined.
I'm following Matthias Muller's Position Based Dynamics paper for implementation. I've also done a solid simulation using another of his paper with similar idea. These ideas are really innovative. They do not make that much physical sense, but they follow physical laws, and most importantly, they are a lot faster than physically based method like mass-spring-damper system.
Here's a demo for the cloth simulation. Right now it does has stretch / bend / pinned point / collision constraints, but no self intersection has been taken into consideration.
In fact, the self-intersection is the most interesting part to me. Because the cloth is just a thin layer of unclosed mesh, it's impossible to define a collision with it: position would make sense on both side of the cloth.
I'm looking into this problem right now, following these papers:
http://www.cs.ubc.ca/~rbridson/docs/cloth2002.pdf
http://www.cs.ubc.ca/~rbridson/docs/cloth2003.pdf
http://graphics.pixar.com/library/UntanglingCloth/paper.pdf
Hopefully I can find some insights from these paper and improve this project in the following days.
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