Hi Everyone !
I review the code written before, I just forgot one theory of "normal mapping" tech.
From lighting theory point, When I need to lighting a object, object must has normal information, that's enough.
But in "normal mapping" tech, why I need tangent and binormal ? If I caculate lighting using normal map's data straight, is that really wrong ?
I make a water demo with high light, that is using 2 normal map, I using those data for lighting straight, the vision result I cant see something wierd ? Is that wrong in theory ?