rake install
Using the parallel gem:
require 'parallel'
module PathTracer
class Scene
# ...
def render(ns=1, file="output.ppm")
puts "writing #{file}"
# produce a 2d array of all pixels:
pixels = ([email protected]).to_a.product(([email protected]).to_a)
# use all CPU cores for the heavy lifting:
data = Parallel.map(pixels) do |y,x|
col = Vector[0, 0, 0]
(1..ns).each do |s1|
(1..ns).each do |s2|
i = (x + (s1 - Random.rand) / ns) / @width.to_f
j = (y + (s2 - Random.rand) / ns) / @height.to_f
ray = @camera.ray(i, j)
col += color(ray)
end
end
percentage = (y * @width + x) * 100 / (@width * @height - 1)
printf("\r[%-20s] %d%%", "=" * (percentage / 5), percentage)
col /= (ns * ns).to_f
end
# Write the file as before...
Running on a 12 core linux box:
[nix-shell:~/src/path_tracer]$ time ruby -Ilib ./examples/cover.rb && convert cover.ppm cover.png
writing cover.ppm
[=================== ] 99%%
real 1m36.414s
user 17m6.289s
sys 0m3.612s
https://imgur.com/myAhfTT
https://github.com/Tarptaeya/path_tracer/blob/7fcbc3a6ae35fa7599dc5fc9550b93696df7b7cb/lib/path_tracer/hitable.rb#L207
| Category: Ruby / Miscellaneous |
| Watchers: 1 |
| Star: 13 |
| Fork: 1 |
| Last update: Aug 5, 2020 |
