If I check the world-matrix of a camera, that views the default cube from the negative world y-axis location:(0, -6, 0) I see
[1, 0, 0, 0] |0, 0, -1, -6| |0, 1, 0, 0| [0, 0, 0, 1]
Can someone help me interpret the matrix? I understand the translation part, but which axes define the projection plane? I'm viewing in the world y-axis direction so the camera z-axis points there, but I expected camera z-axis to be the world -y-axis and camera x-axis to stay aligned with the world x-axis (true) and the camera y-axis to be aligned with the world z-axis.
In short, with blender, cameras we are viewing in the camera z-axis and we need to negate the camera y-axis to obtain the proper projection plane axes (we leave the camera x-axis alone)? I guess the camera arrow defines the camera "up" direction?