Prism
Engine

# 1. 取单文件源码包，顺便校验 SHA-256
curl -L -O https://github.com/Qianjinqie/prism-engine/releases/download/v3.0.1/prism-engine-v3.0.1-source.txt
curl -L -O https://github.com/Qianjinqie/prism-engine/releases/download/v3.0.1/SHA256SUMS.txt
grep 'v3.0.1' SHA256SUMS.txt | sha256sum -c -

# 2. 抽出包内解包脚本（只需 Node 18+）
awk '/^UNPACK SCRIPT BEGIN$/{f=1;next} /^UNPACK SCRIPT END$/{f=0} f' \
  prism-engine-v3.0.1-source.txt > unpack.cjs
node unpack.cjs                    # 还原 789 个文件

# 3. 编译并跑全量测试
cargo test --workspace --release    # 4629 passed / 0 failed

# 4. 什么都不写，先看它出片
cargo run -p prism-app --release   # 内置演示场景

use prism_core::node::EvalCtx;
use prism_math::Vec3;
use prism_rt::camera::Camera;
use prism_rt::integrator::{render_pixel, MaterialKind, RenderParams, Scene, Sphere};

let scene = Scene {
    spheres: vec![(
        Sphere { center: Vec3::new(0.0, 0.6, 0.0), radius: 0.6 },
        MaterialKind::Lambert { albedo: Vec3::new(0.8, 0.2, 0.15) },
    )],
    ..Default::default()
};
let cam = Camera::new(
    Vec3::new(0.0, 1.2, 4.8),   // 视点
    Vec3::new(0.0, 0.72, 0.0),  // 看向
    Vec3::new(0.0, 1.0, 0.0),   // 上方向
    30.0, 0.05, 4.85, 0.0, 1.0 / 48.0,
);
let ctx = EvalCtx::new(20261028, 0, 0);
let params = RenderParams::new(256, 10);  // 256 spp / 10 bounces

// 纯函数：同参数任意线程、任意顺序，结果逐位相同
let color = render_pixel(&scene, &cam, &ctx, (640, 360), (1280, 720), &params);