[WIP] 50 Years of Ray Tracing
用代码叙述光线追踪技术对发展历程：从1968年它诞生到2018年实时光线追踪发布
- 以历史的发展的眼光学习光线追踪技术，将其中的一些关键对推进作用对文章找出来，并进行代码实践&练习
- 提供尽量简单，直观的 CPU 算法实现；代码的简单/易理解为首位，不太考虑性能优化
- 使用现代 C++ 编程
- 一个基础库 RTKit
- 1.0 版是完全自己在这个 repo 了一点点写起来的
- 2.0 版将底层改用 Intel Embree 用来进行光线与场景求交
文章列表
| 算法名称 | 文件夹 | 作者 | 文章标题 |
|---|---|---|---|
| Ray Casting | 1968.Appel | Arthur Appel | Some techniques for shading machine renderings of solids |
| Recursive Ray Tracing | 1979.Whitted | Turner Whitted | An improved illumination model for shaded display |
| Distributed Ray Tracing | 1984.Cook | Robert Cook et al. | Distributed ray tracing |
| Path Tracing | 1986.Kajiya | James Kajiya | The rendering equation |
| Bidirectional Light Transport | 1994.Veach.BDPT | Eric Veach | Bidirectional Estimators for Light Transport |
| Analytic Direct Lighting | 1995.Arvo | James Richard Arvo | Analytic Methods for Simulated Light Transport |
| Multiple Importance Sampling | 1995.Veach.MIS | Eric Veach et al. | Optimally Combining Sampling Techniques for Monte Carlo Rendering |
| Photon Mapping | 1996.Henrik | Henrik Wann Jensen | Global Illumination using Photon Maps |
| Monte Carlo Direct Lighting | 1996.Shirley | Peter Shirley et al. | Monte Carlo Techniques for Direct Lighting Calculations |
| Metropolis Light Transport | 1997.Vaech.MLT | Eric Veach & Leonidas Guibas | Metropolis Light Transport |
工程配置
- 安装 vcpkg 及依赖库
- VSCode 配置
Ray Casting - Arthur Appel, 1968
- Resolve visibility & depth
- Lambertian shading
- Sharp shadow
Recursive Ray Tracing - Turner Whitted, 1980
- Blinn–Phong shading
- Reflection
- Refraction
Distributed Ray Tracing - Robert Cook et al., 1984
- Soft shadow
- Depth of field
- Glossy reflection
- Motion blur
Path Tracing - James Kajiya, 1986
- Monte Carlo Direct lighting
- Indirect lighting with Russian Roulette termination
- Next Event Estimation
Analytic Direct Lighting - Arvo 1995
Multiple Importance Sampling - Eric Veach et al., 1995
- TODO
- Phong Importance Sampling
- Distant Environment Lighting
- Importance Sampling GGX
My Ray Tracing Kit
- Cross platform: MacOS, Windows 10
- Multi-threaded rendering
RTKit1
- Scene object instancing
- Triangle mesh with BVH
RTKit2
- Towards Physically-based Rendering
- Embree for intersection