Automatically update vertex normals when morphing

[cjlong1213]

Is your feature request related to a problem? Please describe.
As far as I know, the Filament would not update vertex normal(tangent) when morphing animation, it only calculate the normal at first loading, the dynamic normal can make more effect at avatar emoticon animation

Describe the solution you'd like
A API or solution which can update vertex normal at morphing

Describe alternatives you've considered
/

OS and backend
Android OpenGLES

Any suggestion? Thanks in advance.

[pixelflinger]

I don't understand the problem. Filament does update the normals when morphing if they are supplied in the MorphTargetBuffer.