PathTracer

Path tracer using C++

What is this

Lighting Path tracer implemented by following Peter Shirley's Ray Tracing in One Weekend Book Series.

Originally I wanted to use this code to render a high resolution avatar similar to one I made in Unity some time ago, but it turned out that I had great interest in the inner workings of a Ray Tracer, so ended up following a book and making my changes to the code. The avatar is one of the scenes in the image above.
This repository is always work in progress. Sometimes when I have free time, I sit down to continue following the book and adding new features 🙂.

Features

Custom changes:

• adding scene class that contains initialization of hittalbe objects and sets appropriate image format depending on scene
• thread pooling: minimize downtime by rendering lines concurrently
• during render, enter p to generate preview

From the book:

• Materials:
  • Lambertian, Metal, Dielectric, Diffuse-light, Isotropic
  • Textures: procedural, image mapping
• Hittables:
  • Sphere
  • Rectangle
  • Box (collection of 6 rectangles)
• Other:
  • Defocus Blur
  • Perlin noise (+ turbulence)
  • Threading

External Resources

For image loading (to use in textures) stb was used.
For thread pooling implementation, I used ThreadPool repository