21 releases
Uses old Rust 2015
0.4.2 | Jan 2, 2024 |
---|---|
0.4.1 | Jun 23, 2022 |
0.3.5 | Dec 29, 2019 |
0.3.3 | May 31, 2019 |
0.1.12 |
|
#34 in Rendering
68 downloads per month
34KB
638 lines
A Rust implementation of a small ray/pathtracer.
Inspired by Kevin Beason's educational 99-line raytracer/pathtracer.
Supports:
- Ray-to-Sphere
- Ray-to-Plane
- Ray-to-Rectangle
- Ray-to-Triangle (slow, no acceleration yet. Soon)
Usage
# Cargo.toml
[dependencies]
smallpt = "0.4.2"
Example
extern crate smallpt;
extern crate minifb;
use smallpt::*;
use minifb::{Key, Window, WindowOptions};
fn main() {
let num_samples = 128;
let width = 512;
let height = 512;
let mut backbuffer = vec![Vector3::new(0.0, 0.0, 0.0); width * height];
let mut scene = Scene::init();
// Spheres
// Mirror
scene.add(Box::new(Sphere::new(
16.5,
Vector3::new(27.0, 16.5, 47.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(1.0, 1.0, 1.0), BSDF::Mirror),
)));
// Glass
scene.add(Box::new(Sphere::new(
16.5,
Vector3::new(73.0, 16.5, 78.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(1.0, 1.0, 1.0), BSDF::Glass),
)));
// Planes
// Bottom
scene.add(Box::new(Plane::new(
Vector3::new(0.0, 0.0, 0.0),
Vector3::new(0.0, 1.0, 0.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(0.75, 0.75, 0.75), BSDF::Diffuse),
)));
// Left
scene.add(Box::new(Plane::new(
Vector3::new(1.0, 0.0, 0.0),
Vector3::new(1.0, 0.0, 0.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(0.75, 0.25, 0.25), BSDF::Diffuse),
)));
// Right
scene.add(Box::new(Plane::new(
Vector3::new(99.0, 0.0, 0.0),
Vector3::new(-1.0, 0.0, 0.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(0.25, 0.25, 0.75), BSDF::Diffuse),
)));
// Front
scene.add(Box::new(Plane::new(
Vector3::new(0.0, 0.0, 0.0),
Vector3::new(0.0, 0.0, 1.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(0.75, 0.75, 0.75), BSDF::Diffuse),
)));
// Back
scene.add(Box::new(Plane::new(
Vector3::new(0.0, 0.0, 170.0),
Vector3::new(0.0, 0.0, -1.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(0.0, 0.0, 0.0), BSDF::Diffuse),
)));
// Top
scene.add(Box::new(Plane::new(
Vector3::new(0.0, 81.6, 0.0),
Vector3::new(0.0, -1.0, 0.0),
Material::new(Vector3::new(0.0, 0.0, 0.0), Vector3::new(0.75, 0.75, 0.75), BSDF::Diffuse),
)));
// Light (emissive rectangle)
scene.add(Box::new(Rectangle::new(
Vector3::new(50.0, 81.5, 50.0),
Vector3::new(0.0, -1.0, 0.0),
Vector3::new(1.0, 0.0, 0.0),
Vector3::new(0.0, 0.0, 1.0),
33.0,
33.0,
Material::new(Vector3::new(12.0, 12.0, 12.0), Vector3::new(0.0, 0.0, 0.0), BSDF::Diffuse),
)));
let camera = Camera {
origin: Vector3::new(50.0, 50.0, 200.0),
forward: Vector3::new(0.0, -0.05, -1.0).normalize(),
right: Vector3::new(1.0, 0.0, 0.0).normalize(),
up: Vector3::new(0.0, 1.0, 0.0).normalize(),
};
let mut buffer: Vec<u32> = vec![0; width * height];
let mut window = Window::new("smallpt in Rust", width, height, WindowOptions::default())
.unwrap_or_else(|e| {
panic!("{}", e);
});
// Render
let mut num_rays = 0;
trace(&scene, &camera, width, height, num_samples, &mut backbuffer, &mut num_rays);
while window.is_open() && !window.is_key_down(Key::Escape) {
for i in 0..width * height {
let color = saturate(tonemap(backbuffer[i]));
let r = (color.x * 255.0).round() as u32;
let g = (color.y * 255.0).round() as u32;
let b = (color.z * 255.0).round() as u32;
buffer[i] = (r << 16) | (g << 8) | b;
}
window.update_with_buffer(&buffer, width, height).unwrap();
}
}
Architecture
Dependencies
~6.5MB
~151K SLoC