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-rw-r--r--benchmark/gc/aobench.rb292
1 files changed, 291 insertions, 1 deletions
diff --git a/benchmark/gc/aobench.rb b/benchmark/gc/aobench.rb
index 2eed7ab..2bd6acf 100644
--- a/benchmark/gc/aobench.rb
+++ b/benchmark/gc/aobench.rb
@@ -1 +1,291 @@
-require_relative '../bm_app_aobench.rb'
+# 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