Custom Vertex Shader Impact on Shadows

[pennyloafers]

Yea normals are tricky, how I would approach this would be to use the MODEL_MATRIX.

Some one did this not to long ago.

How do I rotate a mesh toward something in a shader?

MODELVIEW_MATRIX = VIEW_MATRIX * mat4(INV_VIEW_MATRIX[0], INV_VIEW_MATRIX[1], INV_VIEW_MATRIX[2], MODEL_MATRIX[3]); Just put this in the vertex shader, if you don’t want to modify the code beyond facing the camera you’ll be fine without understanding the matrices. And like Armynator said using the built-in shader mode is a good option, which doesn’t require you to understand the matrices

I think if you can modify the matrix uniforms you wouldn’t need to recalculate the normals.

https://en.m.wikibooks.org/wiki/GLSL_Programming/Vertex_Transformations