It seems the btSoftbody use the PBD (position based dynamic) algorithm. But, it is different from the origina one (https://matthias-research.github.io/pag ... sedDyn.pdf).
For example, the stiffness is used as:
l.m_c0 = (l.m_n->m_im + l.m_n->m_im) / m.m_kLST;
Is there any document to describe more details? Or where can I find a paper to decribe the used algorithm?
Any suggestion is appreciated~~~
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