Raysetta Ruby

A raytracer written in Ruby. Part of the Raysetta project. Based on Ray Tracing in One Weekend.

Install the gem and add to the application's Gemfile by executing:

$ bundle add raysetta

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install raysetta

If you've installed the gem you can use the raysetta executable:

$ raysetta scene.json --width 800 --height 600 --samples 50 --depth 100 --format ppm -o output.ppm

Otherwise you can just clone the repo and run via bin/exe:

$ bin/exe scene.json --width 800 --height 600 --samples 50 --depth 100 --format ppm -o output.ppm

require "raysetta"

scene = Raysetta::Scene.parse(File.read("scene.json"))
tracer = Raysetta::Tracer.new(scene, width: 800, height: 600, samples_per_pixel: 50, max_depth: 100)

output = Array.new(tracer.height) { Array.new(tracer.width) { [0, 0, 0] } }
output.each.with_index do |row, i|
  row.each.with_index do |pixel, j|
    r, g, b = tracer.call(j, i)

    pixel[0] = r
    pixel[1] = g
    pixel[2] = b
  end
end

# store output as an image

require "raysetta/runner"

scene = Raysetta::Scene.parse(File.read("scene.json"))
tracer = Raysetta::Tracer.new(scene, width: 800, height: 600, samples_per_pixel: 50, max_depth: 100)
runner = Raysetta::Runner::Sync.new(tracer)
runner.call
out = Raysetta::Output::PPM.new(runner.output, width: tracer.width, height: tracer.height)
out.save("output.ppm")

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/danini-the-panini/raysetta-ruby.

The gem is available as open source under the terms of the MIT License.