#ray-tracing #path-tracing #3d #graphics

ray-tracer

A simple yet extensible ray tracing engine

1 unstable release

0.1.0 Apr 9, 2019

#54 in Rendering

MIT/Apache

4.5MB
2.5K SLoC

Ray Tracer

A toy ray tracer for educational purposes (i.e. my own education).

Live Demo (WebAssembly)

demo-img

Features

  • Geometries:
    • Sphere
    • Rectangle
    • Cube
  • Transformations:
    • Translation
    • Rotations (TODO)
    • Scale (TODO)
    • Shear (TODO)
  • Materials:
    • Lambertian
    • Metal
    • Dielectric
    • Emitting
  • Textures:
    • Uniform
    • Checker
    • Gradient (TODO)
    • Image (TODO)
    • Perlin (TODO)
  • Cameras:
    • Perspective
    • Orthographic (TODO)
  • Ray / Actor hit search
    • Linear
    • Binary Tree
    • Octree

Usage

use ray_tracer::vector::Vec3;
use ray_tracer::scene::Scene;
use ray_tracer::hitable::primitive::Sphere;
use ray_tracer::hitable::primitive::Rectangle;
use ray_tracer::hitable::transform::Translation;
use ray_tracer::camera::perspective::PerspectiveCamera;
use ray_tracer::renderer::Renderer;
use ray_tracer::material::Material;
use ray_tracer::material::plain::PlainMaterial;
use ray_tracer::material::lambertian::LambertianMaterial;
use ray_tracer::material::metal::MetalMaterial;
use ray_tracer::actor::Actor;
use ray_tracer::texture::uniform::UniformTexture;
use ray_tracer::constants::Axis;

let mut scene = Scene::<f64>::new();
scene.set_background(Vec3::from_array([0.2, 0.2, 0.2]));

// The floor
let hitable = Box::new(Rectangle::new(100.0, Axis::X, 100.0, Axis::Y));
let texture = Box::new(UniformTexture::new(Vec3::from_array([0.8, 0.8, 0.8])));
let material = Box::new(LambertianMaterial::new(texture, 0.65));
let actor = Actor { hitable, material};
scene.add_actor(actor);

// A sphere
let hitable = Box::new(Sphere::new(1.5));
let hitable = Box::new(Translation::new(hitable, Vec3::from_array([0.0, 0.0, 1.5])));
let texture = Box::new(UniformTexture::new(Vec3::from_array([1.0, 0.2, 0.2])));
let material = Box::new(MetalMaterial::new(texture, 0.0));
let actor = Actor { hitable, material};
scene.add_actor(actor);

// A light
let hitable = Box::new(Sphere::new(2.5));
let hitable = Box::new(Translation::new(hitable, Vec3::from_array([0.0, -2.0, 12.5])));
let texture = Box::new(UniformTexture::new(Vec3::from_array([1.0, 1.0, 1.0])));
let material = Box::new(PlainMaterial::new(texture));
let actor = Actor { hitable, material};
scene.add_actor(actor);


// Set up the camera
let width = 320;
let height = 180;
let aspect = width as f64 / height as f64;

let mut camera = PerspectiveCamera::<f64>::new();
camera.set_fov(0.37 * std::f64::consts::PI);
camera.set_position(&[0.0, - 4.0, 1.5]);
// camera.set_direction(&[0.0, 1.0, 0.0]);
camera.set_lookat(&[0.0, 0.0, 1.5]);
camera.set_up(&[0.0, 0.0, 1.0]);
camera.set_fov(0.35 * std::f64::consts::PI);

// Set up the renderer
let samples = 256;
let max_reflections = 8;
let antialiasing = false
let renderer = Renderer::new(width, height, samples, max_reflections, antialiasing);

// Process the image
let image = renderer.render(&scene, &camera);

Dependencies