chapter11_nested_spheres.yml

# Scene description for image on page 159 of
# "The Ray Tracer Challenge", depicting two nested
# glass spheres against a checkered background.
#
# author: Jamis Buck <jamis@jamisbuck.org>

- add: camera
  width: 600
  height: 600
  field-of-view: 0.45
  from: [ 0, 0, -5 ]
  to: [ 0, 0, 0 ]
  up: [ 0, 1, 0 ]

- add: light
  intensity: [ 0.9, 0.9, 0.9 ]
  at: [ 2, 10, -5 ]

# wall
- add: plane
  transform:
    - [ rotate-x, 1.5708 ]
    - [ translate, 0, 0, 10 ]
  material:
    pattern:
      type: checkers
      colors:
        - [ 0.15, 0.15, 0.15 ]
        - [ 0.85, 0.85, 0.85 ]
    ambient: 0.8
    diffuse: 0.2
    specular: 0

# glass ball
- add: sphere
  material:
    color: [ 1, 1, 1 ]
    ambient: 0
    diffuse: 0
    specular: 0.9
    shininess: 300
    reflective: 0.9
    transparency: 0.9
    refractive-index: 1.5

# hollow center
- add: sphere
  transform:
    - [ scale, 0.5, 0.5, 0.5 ]
  material:
    color: [ 1, 1, 1 ]
    ambient: 0
    diffuse: 0
    specular: 0.9
    shininess: 300
    reflective: 0.9
    transparency: 0.9
    refractive-index: 1.0000034