hw5: Lighting

Nelson Mitchell
CSCI4229/5229 Fall 2018

Demonstrates basic lighting using a random forest.

Key bindings
  l          Toggles lighting
  g          Generate new forest
  a/A        Decrease/increase ambient light
  d/D        Decrease/increase diffuse light
  s/S        Decrease/increase specular light
  e/E        Decrease/increase emitted light
  n/N        Decrease/increase shininess
  F1         Toggle smooth/flat shading (It looks really bad in flat shading)
  F2         Toggle local viewer mode
  F3         Toggle light distance (1/5)
  F8         Change ball increment
  F9         Invert bottom normal
  m          Toggles light movement
  []         Lower/rise light
  p          Toggles orthogonal/perspective projection
  +/-        Change field of view of perspective
  x          Toggle axes
  arrows     Change view angle
  PgDn/PgUp  Zoom in and out
  0          Reset view angle
  ESC        Exit