Hi,
For a project I had to import a softbody from stl, I used the "loadFromMeshSTL.h" (in ../examples/Importers/ImportSTLDemo/), however I found that it only works for rigid bodies.
Actually it gets each face and transfers the 3 vertexes individually to the vertices array. As a result, if you make a softbody using a stl object, each triangle will be an individual softbody which is meaningless! however, for rigid bodies, it works fine.
So, I extended the existing STL importer for softbodies. You can find it here below in the case you needed such thing:
https://github.com/Ehsanizadi/Bullet-ex ... Importer.h
the function name is :STLImporterToSoftBody
It can be regarded as a softbody helper as well.
In addition it merges the repetitive vertices and removes them from the memory, resulting a unified and continuous softbody. So, do not hesitate to use it for you arbitary shaped softbodies in Bullet.
Hope it helps the nice and very supportive Bullet community.
Ehsan