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-rw-r--r--benchmark/bm_app_aobench.rb291
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diff --git a/benchmark/bm_app_aobench.rb b/benchmark/bm_app_aobench.rb
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--- a/benchmark/bm_app_aobench.rb
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-# AO render benchmark
-# Original program (C) Syoyo Fujita in Javascript (and other languages)
-# https://code.google.com/p/aobench/
-# Ruby(yarv2llvm) version by Hideki Miura
-#
-
-IMAGE_WIDTH = 256
-IMAGE_HEIGHT = 256
-NSUBSAMPLES = 2
-NAO_SAMPLES = 8
-
-class Vec
- def initialize(x, y, z)
- @x = x
- @y = y
- @z = z
- end
-
- attr_accessor :x, :y, :z
-
- def vadd(b)
- Vec.new(@x + b.x, @y + b.y, @z + b.z)
- end
-
- def vsub(b)
- Vec.new(@x - b.x, @y - b.y, @z - b.z)
- end
-
- def vcross(b)
- Vec.new(@y * b.z - @z * b.y,
- @z * b.x - @x * b.z,
- @x * b.y - @y * b.x)
- end
-
- def vdot(b)
- @x * b.x + @y * b.y + @z * b.z
- end
-
- def vlength
- Math.sqrt(@x * @x + @y * @y + @z * @z)
- end
-
- def vnormalize
- len = vlength
- v = Vec.new(@x, @y, @z)
- if len > 1.0e-17 then
- v.x = v.x / len
- v.y = v.y / len
- v.z = v.z / len
- end
- v
- end
-end
-
-
-class Sphere
- def initialize(center, radius)
- @center = center
- @radius = radius
- end
-
- attr_reader :center, :radius
-
- 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 then
- t = - b - Math.sqrt(d)
-
- if t > 0.0 and t < isect.t then
- 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
- else
- 0.0
- end
- end
- nil
- end
-end
-
-class Plane
- def initialize(p, n)
- @p = p
- @n = n
- end
-
- def intersect(ray, isect)
- d = -@p.vdot(@n)
- v = ray.dir.vdot(@n)
- v0 = v
- if v < 0.0 then
- v0 = -v
- end
- if v0 < 1.0e-17 then
- return
- end
-
- t = -(ray.org.vdot(@n) + d) / v
-
- if t > 0.0 and t < isect.t then
- isect.hit = true
- isect.t = t
- isect.n = @n
- isect.pl = Vec.new(ray.org.x + t * ray.dir.x,
- ray.org.y + t * ray.dir.y,
- ray.org.z + t * ray.dir.z)
- end
- nil
- end
-end
-
-class Ray
- def initialize(org, dir)
- @org = org
- @dir = dir
- end
-
- attr_accessor :org, :dir
-end
-
-class Isect
- def initialize
- @t = 10000000.0
- @hit = false
- @pl = Vec.new(0.0, 0.0, 0.0)
- @n = Vec.new(0.0, 0.0, 0.0)
- end
-
- attr_accessor :t, :hit, :pl, :n
-end
-
-def clamp(f)
- i = f * 255.5
- if i > 255.0 then
- i = 255.0
- end
- if i < 0.0 then
- i = 0.0
- end
- i.to_i
-end
-
-def otherBasis(basis, n)
- basis[2] = Vec.new(n.x, n.y, n.z)
- basis[1] = Vec.new(0.0, 0.0, 0.0)
-
- if n.x < 0.6 and n.x > -0.6 then
- basis[1].x = 1.0
- elsif n.y < 0.6 and n.y > -0.6 then
- basis[1].y = 1.0
- elsif n.z < 0.6 and n.z > -0.6 then
- basis[1].z = 1.0
- else
- basis[1].x = 1.0
- end
-
- basis[0] = basis[1].vcross(basis[2])
- basis[0] = basis[0].vnormalize
-
- basis[1] = basis[2].vcross(basis[0])
- basis[1] = basis[1].vnormalize
-end
-
-class Scene
- def initialize
- @spheres = Array.new
- @spheres[0] = Sphere.new(Vec.new(-2.0, 0.0, -3.5), 0.5)
- @spheres[1] = Sphere.new(Vec.new(-0.5, 0.0, -3.0), 0.5)
- @spheres[2] = Sphere.new(Vec.new(1.0, 0.0, -2.2), 0.5)
- @plane = Plane.new(Vec.new(0.0, -0.5, 0.0), Vec.new(0.0, 1.0, 0.0))
- end
-
- def ambient_occlusion(isect)
- basis = Array.new
- otherBasis(basis, isect.n)
-
- ntheta = NAO_SAMPLES
- nphi = NAO_SAMPLES
- eps = 0.0001
- occlusion = 0.0
-
- p0 = Vec.new(isect.pl.x + eps * isect.n.x,
- isect.pl.y + eps * isect.n.y,
- isect.pl.z + eps * isect.n.z)
- nphi.times do |j|
- ntheta.times do |i|
- r = rand
- phi = 2.0 * 3.14159265 * rand
- x = Math.cos(phi) * Math.sqrt(1.0 - r)
- y = Math.sin(phi) * Math.sqrt(1.0 - r)
- z = Math.sqrt(r)
-
- rx = x * basis[0].x + y * basis[1].x + z * basis[2].x
- ry = x * basis[0].y + y * basis[1].y + z * basis[2].y
- rz = x * basis[0].z + y * basis[1].z + z * basis[2].z
-
- raydir = Vec.new(rx, ry, rz)
- ray = Ray.new(p0, raydir)
-
- occisect = Isect.new
- @spheres[0].intersect(ray, occisect)
- @spheres[1].intersect(ray, occisect)
- @spheres[2].intersect(ray, occisect)
- @plane.intersect(ray, occisect)
- if occisect.hit then
- occlusion = occlusion + 1.0
- else
- 0.0
- end
- end
- end
-
- occlusion = (ntheta.to_f * nphi.to_f - occlusion) / (ntheta.to_f * nphi.to_f)
-
- Vec.new(occlusion, occlusion, occlusion)
- end
-
- def render(w, h, nsubsamples)
- cnt = 0
- nsf = nsubsamples.to_f
- h.times do |y|
- w.times do |x|
- rad = Vec.new(0.0, 0.0, 0.0)
-
- # Subsampling
- nsubsamples.times do |v|
- nsubsamples.times do |u|
-
- cnt = cnt + 1
- wf = w.to_f
- hf = h.to_f
- xf = x.to_f
- yf = y.to_f
- uf = u.to_f
- vf = v.to_f
-
- px = (xf + (uf / nsf) - (wf / 2.0)) / (wf / 2.0)
- py = -(yf + (vf / nsf) - (hf / 2.0)) / (hf / 2.0)
-
- eye = Vec.new(px, py, -1.0).vnormalize
-
- ray = Ray.new(Vec.new(0.0, 0.0, 0.0), eye)
-
- isect = Isect.new
- @spheres[0].intersect(ray, isect)
- @spheres[1].intersect(ray, isect)
- @spheres[2].intersect(ray, isect)
- @plane.intersect(ray, isect)
- if isect.hit then
- col = ambient_occlusion(isect)
- rad.x = rad.x + col.x
- rad.y = rad.y + col.y
- rad.z = rad.z + col.z
- end
- end
- end
-
- r = rad.x / (nsf * nsf)
- g = rad.y / (nsf * nsf)
- b = rad.z / (nsf * nsf)
- printf("%c", clamp(r))
- printf("%c", clamp(g))
- printf("%c", clamp(b))
- end
- nil
- end
-
- nil
- end
-end
-
-alias printf_orig printf
-def printf *args
-end
-
-# File.open("ao.ppm", "w") do |fp|
- printf("P6\n")
- printf("%d %d\n", IMAGE_WIDTH, IMAGE_HEIGHT)
- printf("255\n", IMAGE_WIDTH, IMAGE_HEIGHT)
- Scene.new.render(IMAGE_WIDTH, IMAGE_HEIGHT, NSUBSAMPLES)
-# end
-
-undef printf
-alias printf printf_orig