When I export fbx from houdini, bones and animation, he will do plotting of keys and make all of them linear, before he save data to fbx.

All objects in scene that have animation are exported normal with keys that are not plotted, except bones, why ?

Can I change that (to have normal, bezier or … , key interpolation) ?
I do not need plotted animation curve, key every frame.
I am in the c++ and Py if it is needed.

Currently I am programming in objective-c and c++ using fbx SDK to export from fbx to my extension for game.

can someone help me please ….

thanks