库 ray_tracing_core

GitHub 页面 rabbid76.github.io/ray-tracing-with-rust
GitHub 仓库 Rabbid76/ray-tracing-with-rust

基于 Peter Shirley 的书籍

• "一周之内学会光线追踪（迷你书籍系列第 1 册）"
• "光线追踪：下周（迷你书籍系列第 2 册）"
• "光线追踪：余生（迷你书籍系列第 3 册）"

“我尽量避免使用 C++ 的大多数“现代特性”，但继承和运算符重载对于光线追踪器来说过于有用，不能放弃。”
― Peter Shirley, 一周之内学会光线追踪

示例

use ray_tracing_core::random;
use ray_tracing_core::test::TestSceneSimple;
use ray_tracing_core::types::ColorRGB;
use ray_tracing_core::types::FSize;

fn main() {
    let cx = 40;
    let cy = 20;
    let samples = 10;
    let scene = TestSceneSimple::new().scene;
    
    let mut pixel_data: Vec<u8> = Vec::with_capacity(cx * cy * 4);
    pixel_data.resize(cx * cy * 4, 0);
    
    for x in 0..cx {
        for y in 0..cy {
            let mut c = ColorRGB::new(0.0, 0.0, 0.0);
            for _ in 0..samples {
                let u = (x as FSize + random::generate_size()) / cx as FSize;
                let v = 1.0 - (y as FSize + random::generate_size()) / cy as FSize;
                c = c + scene.ray_trace_color(u, v);
            }
            c = c / samples as FSize;
    
            let i = (y * cx) + x;
            pixel_data[i * 4] = (c[0].sqrt() * 255.0).round() as u8;
            pixel_data[i * 4 + 1] = (c[1].sqrt() * 255.0).round() as u8;
            pixel_data[i * 4 + 2] = (c[2].sqrt() * 255.0).round() as u8;
            pixel_data[i * 4 + 3] = 255;
        }
    }
    
    // [...]
}