I made my obj parser

and It also calculate tagent space for normalmap.

it seems calculation is wrong..

any good suggestion for this?

I can't upload my pics so I link my question.

https://gamedev.stackexchange.com/questions/147199/how-to-debug-calculating-tangent-space

and I uploaded my code here

ObjLoader.cpp

ObjLoader.h

Here two ideas to debug your stuff :

You can run a geometry shader to display the TBN at each vertex.

You can display the world space normal map instead of the final computation too.

You could use AssImp and then output to your own proprietary format.