How to calculate camera position in shader？

ning_xue

I need to use the camera position as a parameter in the shader, but I don't want to pass the camera position in real time through the program, I remember that there is a built-in transformation matrix that has the camera position information, how can I get it?

TTaykAH

Possibly CAMERA_METRIX is what you need. In matrix last row represents translation, but I'm not sure

cybereality

I think the last column of the matrix is the position. I assume Godot uses column major format.

ning_xue

I think I already know how to get the camera position. The above is the matrix from world space coordinates to view space coordinates, and the P in the last column is the coordinates of the camera in world space. This matrix should correspond to INV_CAMERA_MATRIX in the shader, and the value of P can be calculated from this matrix.