simtk.org

hi,
I'm recentently building a model using personalized bone geometry by nmsbuilder which can generate a .osim file including mass,intertial, etc. When I understood the COM on OpenSim, I confused that .VTP files are Solid or hollow which have great impact on segment COM. I have known that opensim software studies the relationship between rigid bodies which internal structure of bodys is unimportant, and if I wanted to building a model by nmsbuilder, is it necessary to fill the internal structure of bone? if not, how I get mass,intertial, etc?
Looking forward to everyone's guidance.

Hi,

From memory you only need the "shell" of a geometry as uses the volume and density of the bone and the surrounding skin hull to calculate the mass and inertial properties. Future questions about NMS builder are probably best directed to the developers of NMSbuilder (http://www.nmsbuilder.org/contact.html) .

Thanks
Bryce