Lump legs and arm together in .bioMod

[MahsaP]

In a human model how can I lump together legs and also arms? I can do that simply in a .lua model by adding left and right side in the visual tag, and redefine the mass and inertia matrix. Thanks!

[pariterre]

Hi @MahsaP
Do you mean automatically symmetrize the model?

If so, you basically have to do it by hand. I do not have an automatic symmetry feature implemented. But it would be a nice idea though... Not really hard to implement either

[MahsaP]

Hi @pariterre. Doing that automatically would be nice, but I am trying to understand how to do that by hand. Would you please give me an example how I can do that? for example for two thighs. Is it like adding them in one segment and having both mesh files there? The markers have to be define separately anyway.

[pariterre]

First you have to define a new RT. Let suppose you want to symmetrize against the XY plane (usually because Y is vertical). Then you define the new RT as : -Rx -Ry Rz xyz Tx Ty -Tz
If you don't have RT as euler angles, you just have to convert them in Euler angles then perform the rotation (and convert back to matrix if you want)

For everything using only translation, -Tz should be applied.
For the obj, you have to read them and convert them the same way