https://github.com/emredogann/software-ray-tracer

A CPU-driven Multi-Threaded Ray Tracer written in C++.
https://github.com/emredogann/software-ray-tracer

cmake cpp cpu multithreading ray-tracing raytracer raytracing raytracing-in-one-weekend

Last synced: 28 days ago
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A CPU-driven Multi-Threaded Ray Tracer written in C++.

• Host: GitHub
• URL: https://github.com/emredogann/software-ray-tracer
• Owner: EmreDogann
• License: apache-2.0
• Created: 2022-02-14T11:08:21.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2022-02-16T13:47:39.000Z (almost 3 years ago)
• Last Synced: 2024-11-07T07:21:00.302Z (3 months ago)
• Topics: cmake, cpp, cpu, multithreading, ray-tracing, raytracer, raytracing, raytracing-in-one-weekend
• Language: C++
• Homepage:
• Size: 8.06 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Software Ray Tracing

My implementation of the [Ray Tracing In One Weekend](https://raytracing.github.io/books/RayTracingInOneWeekend.html) series.

# Main features:

- Materials (Lambertain, Metallic, Dielectric)

- Camera Positioning

- MSAA

- Ray interactions:

  - Reflection

  - Refraction/Transmission

- Global-Illumination

- Multi-Threading

# Multi-Threading

For Multi-Threading, I have designed the implementation as follows:

- Spawn **X** number of threads (by default will spawn the max number of threads available).

- Using atomic variables, each thread will pick a row to compute.

  - Once a row has been finished, the thread will move onto the next free row.

- Once all rows have been calculated, they are reordered in an array and then written to a .ppm file.

The image below has a resolution of **2560x1440**. Rendered with 100 samples per pixel with a ray depth of 50.

On a Ryzen 7 3700x, utlizing all 16 threads at 4.0GHz all-core, the entire image was rendered in 5 minutes 46 seconds. This is almost a 10x improvement on the inital single-threaded version.

![Image](./images/Image.png)