Cylinder

def scene_at(now)
{
  var t = Animations.ease( Animations.animate( 0, 20, seconds(5) ),
                           Easing.cubic_inout() )[now]

  var eye_position = Animations.circular( [ "position": pos(0, 5 + t, 5 + t),
                                            "around": pos(0, 0, 0),
                                            "duration": seconds(5) ] )

  var camera = Cameras.perspective( [ "eye": eye_position[now],
                                      "look_at": pos(0,0,0) ] )

  var r = Materials.uniform( [ "ambient": Colors.white() * 0.1,
                               "diffuse": Colors.red() * 0.8,
                               "specular": Colors.white() * 0.5,
                               "specular_exponent": 10 ] )
  var g = Materials.uniform( [ "ambient": Colors.white() * 0.1,
                               "diffuse": Colors.green() * 0.8,
                               "specular": Colors.white() * 0.5,
                               "specular_exponent": 10 ] )
  var b = Materials.uniform( [ "ambient": Colors.white() * 0.1,
                               "diffuse": Colors.blue() * 0.8,
                               "specular": Colors.white() * 0.5,
                               "specular_exponent": 10 ] )

  var xcyl = decorate(r, cylinder_along_x())
  var ycyl = decorate(g, cylinder_along_y())
  var zcyl = decorate(b, cylinder_along_z())

  var root = union( [ xcyl, ycyl, zcyl ] )

  var lights = [ Lights.omnidirectional( pos(5,5,5), Colors.white() * 0.5 ),
                 Lights.omnidirectional( pos(-5,5,-5), Colors.white() * 0.5 )
               ]

  create_scene(camera, root, lights)
}

var raytracer   = Raytracers.v6()

var renderer    = Renderers.standard( [ "width": 500,
                                       "height": 500,
                                       "sampler": Samplers.multijittered(2),
                                       "ray_tracer": raytracer ] )

pipeline( scene_animation(scene_at, seconds(5)),
          [ Pipeline.animation(30),
            Pipeline.renderer(renderer),
            Pipeline.studio() ] )