aten

This is easy, simple ray tracing renderer.

Aten is Egyptian sun god.

Idaten(path tracing on GPGPU) is under construction.

Idaten is Japanese god, it runs fast. And Idanten includes characters of aten, "idaten"

Features

Some features are only supported by either.

• Rendering algorithms
  • Next Event Estimation Path Tracing
• Acceleration
  • BVH
  • SBVH
  • TopLayer, BottomLayer
  • Transform(Translate, Rotate, Scale) objects
• Materials
  • Emissive
  • Lambert
  • Specular
  • Refraction
  • Microfacet Beckman
  • Microfacet GGX
  • OrenNayar
  • Disney BRDF
  • Retroreflective (Experimental)
• Lights
  • Polygonal Light(Area Light)
  • Point Light
  • Spot Light
  • Directional Light
  • Image Based Lighting
• Quasi Monte Carlo
  • CMJ(Correllated Multi Jittered)
• Rendering shapes
  • Polygon(.obj file)
  • Sphere
• Texture Map
  • Albedo
  • Normal
  • Roughness
• PostEffect
  • Reinherd Tone Mapping
• Camera
  • Pinhole
  • Equirect
• VolumeRendering
  • Homogeneous
  • Heterogeneous
  • NanoVDB format
• Others
  • Instancing
  • Deformation
  • Alpha blending
• Spatiotemporal Variance-Guided Filtering: Real-Time Reconstruction for Path-Traced Global Illumination
• Spatiotemporal reservoir resampling for real-time ray tracing with dynamic direct lighting
• Physically-based Feature Line Rendering

Limitations

• Not optimized by SIMD
  • To keep easy, simple, to avoid difficult to understand, so not use SIMD.
• There are still some Japanese comments...

How To Build

See How To Build document

How to run

Windows

Please find exe files and run them. You can find them in each directory where the source files are in.

Linux

Please find the executables and run them. You can find them in the directories which you built the applications. And the directories have same name as execution file.

Docker

This section works for ony Linux.

If you would like to run the executables in docker, you need to ensure that your host can accept X forwarded connections:

xhost +local:<Docker container name>`

And then, run the docker container like the following:

docker run -it --rm -v ${PWD}:/work -v /tmp/.X11-unix:/tmp/.X11-unix:rw --runtime=nvidia -e DISPLAY <Image Name>:latest bash

docker-compose

You also need to ensure your host accept X forward connections. See Docker in How to run

And, run the docker container via docker-compose like the following:

docker-compose -f .devcontainer/docker-compose.yml run aten

For VSCode development

You can open this project on VSCode devcontainer. If you face on devcontainer build failure, it might be due to docker-compose version. In that case, please update docker-compose.

Gallery

PathTracing 100spp

Materials PathTracing 100spp

SVGF (1spp/5bounds)

Deformation

(c) Unity Technologies Japan/UCL

ReSTIR (1spp/5bounds/126point lights w/o environment map)

AlphaBlending

Physically-based Feature Line Rendering

Homogeneous medium

Heterogeneous medium