Fixing immediate issues in the camera moement.
Fixing more issues with the movement in relation to self-orientation. Now it sqr(deltaX ^ 2 + deltaY ^ 2 + deltaZ ^ 2) == delta. Still some issues on movement after rotation though.
Removing assert statements and out of date comments.
Apparently order of camera angle rotations in the display canvas matters. Also, making change of x and y camera angles relative to the z angle, so that the they are are always in up/down and left/right with relation to the screen.