Built-in state variables in shader programs

Often in shader programs you need to access some global state, for example, the current model*view*projection matrix, the current ambient color, and so on. There's no need to declare these variables for the built-in state, you can just use them in shader programs.

Built-in matrices

Matrices (float4x4) supported:

UNITY_MATRIX_MVP: Current model*view*projection matrix
UNITY_MATRIX_MV: Current model*view matrix
UNITY_MATRIX_V: Current view matrix.
UNITY_MATRIX_P: Current projection matrix
UNITY_MATRIX_VP: Current view*projection matrix
UNITY_MATRIX_T_MV: Transpose of model*view matrix
UNITY_MATRIX_IT_MV: Inverse transpose of model*view matrix
UNITY_MATRIX_TEXTURE0 to UNITY_MATRIX_TEXTURE3: Texture transformation matrices

Built-in vectors

Vectors (float4) supported:

UNITY_LIGHTMODEL_AMBIENT: Current ambient color.

Page last updated: 2013-02-16