Keyboard controls for light position and direction. Initially, the
light object is at 0, 4, 0 and is rotated 90 degrees clockwise about its x-axis so
negative z-axis is pointing at origin
(I.e. it is "looking" down at the origin):
- a, d - move light left, right (along its x axis)
- w, s - move light "forward", "back" (light actually moves up/down along its z axis)
- r, f - move light "up", "down" (light will move farther/closer along its y axis)
- i, k - look up, look down (light will initially turn away/towards you)
- j, l - turn left, turn right (rotate about world y)
- O - face origin (must not be aligned with y axis!)
- I, J, K, L - orbit down, right, up, left about origin
- x, X, y, Y, z, Z - positive/negative rotations about light's own axis
- SPACE - pause rotation of cube