[ODE] Ask for documents of the state-of-arts

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I want to find a survey or report about the technology of physical engine nowadays.
Some documents of the state-of-arts of this field.

Could anyone help me?

Thanks a lot!

===============================================
ChenLu
Computer Science & Technology,
State Key Lab of CAD&CG, 
Zhejiang University,
E-mail:chenlu at cad.zju.edu.cn