展示 HN：一个能在任何 GPU 上运行的 Rust 光线追踪器—

展示 HN：一个能在任何 GPU 上运行的 Rust 光线追踪器——甚至在浏览器中。
Show HN: a Rust ray tracer that runs on any GPU – even in the browser

原始链接: https://github.com/tchauffi/rust-rasterizer

这个 Rust 项目展示了三种不同的光线追踪实现：基于 CPU 的渲染器、离线 GPU 渲染器和实时交互式 GPU 光线追踪器。 **CPU 光线追踪器** 执行软件渲染，将场景输出到 PPM 图像文件。**GPU 光线追踪器** 利用计算着色器实现显著更快的渲染速度，达到与 CPU 版本相当的质量，同样输出到 PPM。最后，**实时 GPU 光线追踪器** 提供实时、交互式体验，具有相机控制。用户可以在具有光照/阴影的完整光线追踪和法线可视化调试模式之间切换。所有版本都支持网格 (.obj) 和球体图元，GPU 版本需要兼容的 GPU（Vulkan、Metal 或 DirectX 12）。该项目使用最新的稳定 Rust 版本构建，并为每种实现提供清晰的构建/运行说明。还有一个实时、基于 Web 的演示。

一位名为tchauffi的开发者创建了一个基于Rust的光线追踪器，它既可以在本地运行，也可以通过WebAssembly和wgpu图形库直接在浏览器中运行。该项目受到Sebastian Lague的作品启发，能够渲染具有网格渲染（由BVH加速）和通过直接和间接照明实现逼真光照的3D场景。该光线追踪器作为一个免费的网页演示托管在GitHub Pages上([https://tchauffi.github.io/rust-rasterizer/](https://tchauffi.github.io/rust-rasterizer/))，源代码在GitHub上([https://github.com/tchauffi/rust-rasterizer](https://github.com/tchauffi/rust-rasterizer))。该开发者正在寻求具有wgpu、光线追踪或Rust图形编程经验的人的反馈，并计划未来探索使用Rust进行机器学习项目。

原文

A rasterizer implementation in Rust

Try it online: Live WebGPU Raytracer

This project includes three different raytracing implementations:

CPU Raytracer - Software-based raytracing running on the CPU
GPU Raytracer - Hardware-accelerated raytracing using GPU compute shaders (offline rendering)
Live GPU Raytracer - Real-time interactive GPU raytracer with camera controls

CPU Raytracer (Software Rendering)

The CPU version renders scenes using traditional CPU-based raytracing and outputs to a PPM image file.

# Build and run (outputs to stdout, redirect to file)
cargo run --release > output.ppm

# Or build first, then run
cargo build --release
./target/release/rust-rasterizer > output.ppm

Features:

Full path tracing with multiple bounces
Direct and indirect lighting
Mesh support (.obj files)
Sphere primitives

GPU Raytracer (Offline Rendering)

The GPU version uses compute shaders to accelerate rendering, outputting to a PPM file.

# Build and run
cargo run --bin gpu_raytracer --release > output.ppm

# Or build separately
cargo build --bin gpu_raytracer --release
./target/release/gpu_raytracer > output.ppm

Features:

GPU-accelerated compute shader rendering
Same scene quality as CPU version
Significantly faster rendering times
Hardware-accelerated ray-triangle intersection

Live GPU Raytracer (Interactive Real-time)

The live version provides a real-time interactive window where you can navigate the scene.

# Run the live raytracer
cargo run --bin live_raytracer --release

Controls:

Mouse: Click and drag to rotate the camera
SPACE: Toggle between raytracing and normals visualization modes
Window Title: Displays current mode and FPS

Features:

Real-time GPU raytracing
Interactive camera controls
Two rendering modes:
- Raytracing: Full path tracing with lighting and shadows
- Normals: Fast visualization showing surface normals (useful for debugging)
Live FPS counter in window title

Rust (latest stable version)
For GPU versions: A GPU with compute shader support (Vulkan, Metal, or DirectX 12)