
              ROTATE

This is a simple 3D object viewer.
It demonstrates TAGL features.

Samples file are from the 'avalon.chinalake.navy.mil' site, you can get more 
objects from there.

rotate file.geom [file.ipcol]

Move mouse + Left   button : rotate object
Move mouse + Right  button : rotate light source
Move mouse + Middle button : move object
          (or both buttons)

a       : toggle solid / wire frame 
w       : toggle flat  / gouraud
spacebar: toggle B&W/Color (if an ipcol file has been specified)
z       : toggle ZBuffer
c       : toggle backface culling
q       : quit
n       : invert normals
d       : toggle dithering
s       : toggle specular material
l       : toggle lighting computation
g/h     : gamma control

o Some of the sample files do not have their normals pointing to the right
direction. If an object looks strange, try pressing 'n' (for instance,
sphere4.geom and sticks.geom).

o Convex objects do not require ZBuffer.

o Object that are not a closed surface won't be rendered properly if backface
culling is activated.

o Default mode is flat-shading + solid + ZBuffer + backface culling.

o When is RGB mode, dithering improves a litte bit the image for 15bpp displays

o Dithering cannot be disabled for 8bpp displays (would look too ugly !!!)

o Try 'rotate cube.geom cube.ipcol', press 'z' then ' ' then 'w', and move
  the object and the lighting vector.

