Class: Sphere

Inherits:
Object show all
Defined in:
ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb

Instance Method Summary collapse

Constructor Details

#initialize(center, radius) ⇒ Sphere

Returns a new instance of Sphere.



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# File 'ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb', line 82

def initialize(center, radius)
  @center = center
  @radius = radius
end

Instance Method Details

#center ⇒ Object 



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# File 'ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb', line 87

def center; @center; end

#intersect(ray, isect) ⇒ Object 



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# File 'ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb', line 90

def intersect(ray, isect)
  rs = ray.org.vsub(@center)
  b = rs.vdot(ray.dir)
  c = rs.vdot(rs) - (@radius * @radius)
  d = b * b - c
  if d > 0.0
    t = - b - Math.sqrt(d)

    if t > 0.0 and t < isect.t
      isect.t = t
      isect.hit = true
      isect.pl = Vec.new(ray.org.x + ray.dir.x * t,
                        ray.org.y + ray.dir.y * t,
                        ray.org.z + ray.dir.z * t)
      n = isect.pl.vsub(@center)
      isect.n = n.vnormalize
    end
  end
end

#radius ⇒ Object 



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# File 'ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb', line 88

def radius; @radius; end