Program Control
---------------

ESC/q       Terminates the program

F1-F12      Switch ray-casting shader

i           Print settings information

L/S         Load/save shader settings

r           Reload all shaders

SPACE       Toggle animation

w           Toggle display of bounding box


Transfer Function
-----------------
NOTE: TO BE USED WITH MOUSE CURSOR IN TRANSFER FUNCTION EDITOR

p           Re-compute pre-integration table

t           Toggle transfer function editor

r/g/b/a/o   Toggle red/green/blue/alpha/optical density channel

i           Reset active channels to identity

h/n         Uniformly increase/decrease active channels

m           Mirror active channels horizontally

c           Set active channels to constant value


General Shader Parameters
-------------------------

</>         Decrease/increase sampling distance

[/]         Halve/double sampling distance


Background Settings
-------------------

{/}         Decrease/increase background gray value

f/v         Scale background image

k           Toggle background (image/uniform color)


Isosurface Settings
-------------------

m/j         Decrease/increase isovalue

ALT+m/j     Halve/double step size for isovalue adjustment

M/J         Decrease/increase isovalue of clipping geometry


Translucency Settings
---------------------

,/.         Decrease/increase light absorption


Light Source Settings
---------------------

l           Toggle light source

1/2         Move light source in x-direction

3/4         Move light source in y-direction

5/6         Move light source in z-direction

CTRL+MOUSE  Move light source