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一个基于Vulkan的实时路径跟踪渲染器，目标是实现 质量 和 效率 能用于 实时 的路径跟踪渲染。

不同于目前游戏中实装的各种光追辅助技术，本项目的目标是最接近GroundTruth的路径跟踪， 并提供最接近游戏的运行时环境，验证实时光追的可行性，并实验最新的GPU特性，为下一代渲染架构作准备。

本项目的初衷是：学习，验证，进步。因此，会激进的使用最新技术，有意的规避陈旧技术，利用新c++规范和标准库，全时跨平台开发。

10 seconds Showcase Video

RayTracing Renderer - QX50

RayTracing Renderer - City

RayTracing Renderer - Still

RayTracing Renderer - PlayGround

RayTracing Renderer - LuxBall

RayTracing Renderer - Kitchen

RayTracing Renderer - Living Room

Hybrid Renderer (Android) - QX50

Hybrid Renderer (Android) - Complex Cubes

• Rendering

  • Importance Sampling
  • VNDF Sampling for GGX, by tigrazone
  • Adaptive Sampling, thanks tigrazone
  • Ground Truth Path Tracing
  • Phsyical Light Unit
  • Temporal Reproject
  • High Performance Bilateral Filter Denoiser
  • OpenImageDenoise Denoiser
  • RayQuery on Android
  • Visibiliy Buffer Rendering
  • Legacy Rendering
  • RayTraced Hybrid Rendering
  • Realtime Renderer Switch
  • GPU Draw
  • GPU Raycast

• Scene Management

  • Wavefront OBJ File PBR Scene Support
  • Full GLTF Scene File Support

• System

  • CrossPlatform support for Windows/Linux/MacOS/Android
  • EditorApp including node based MaterialEditor
  • Global Bindless TexturePool
  • MultiThread Resource Loading
  • HDR Display Support
  • Benchmark System
  • Screenshot HDR and encode to avif / jpg

首先，需要安装 Vulkan SDK。各个平台根据lunarG的指引，完成安装。其他的依赖都基于 Microsoft's vcpkg 构建，执行后续的脚本即可完成编译。

项目的Github Action包含windows，linux，android的自动ci脚本，作者会维护其正确性。如有任何环境问题可参阅解决。

本地开发环境部署完成后，各平台可按一下脚本构建

Windows (Visual Studio 2022)

vcpkg_windows.bat
build_windows.bat

Windows (MinGW)

init the MSYS2 MINGW64 shell with following packages，the MSYS2's cmake is not competible with vcpkg, so use cmake inside.

pacman -S --needed git base-devel mingw-w64-x86_64-toolchain ninja

cmake's module FindVulkan has a little bug on MingGW, try modified FindVulkan.cmake as below set(_Vulkan_library_name vulkan) -> set(_Vulkan_library_name vulkan-1) then, execute scripts bellow

vcpkg_mingw.sh
build_mings.sh

Android On Windows

JAVA SDK should be JAVA17 or higher Install Android Studio or Android SDK Tool, with NDK 25.1.8937393 installed

set ANDROID_NDK_HOME=\path\to\ndk
#like: set ANDROID_NDK_HOME=C:\Android\Sdk\ndk\25.1.8937393
vcpkg_android.bat
build_android.bat
deploy_android.bat

Linux

各平台需要提前安装对应的依赖，vcpkg才可以正确运行。

例如，ubuntu

sudo apt-get install ninja-dev curl unzip tar libxi-dev libxinerama-dev libxcursor-dev xorg-dev
./vcpkg_linux.sh
./build_linux.sh

SteamDeck Archlinux

sudo steamos-readonly disable
sudo pacman -S devel-base ninja
./vcpkg_linux.sh
./build_linux.sh

MacOS

brew install molten-vk
brew install glslang
brew install ninja
./vcpkg_macos.sh
./build_macos.sh

• Pure GPU AuxRenderer, display gpu helpers
• WireFrame Rendering
• Realtime Renderer Switch
• GPU Frustum / Occulusion Culling
• GPU Lod Swtiching
• Dynamic Scene Management
• Multi Material Execution
• Huge Landscape

• RayTracingInVulkan
• Vulkan Tutorial
• Vulkan-Samples

项目的发展，学习心得，一些随感，记录于 Thoughts.md，随时更新。