Add scene representing the final image in raytracingthenextweek.

rtiow/src/hitable.rs

@@ -1,3 +1,5 @@
+use std::sync::Arc;
+
 use aabb::AABB;
 use material::Material;
 use ray::Ray;
@@ -15,3 +17,12 @@ pub trait Hit: Send + Sync {
     fn hit(&self, r: Ray, t_min: f32, t_max: f32) -> Option<HitRecord>;
     fn bounding_box(&self, t_min: f32, t_max: f32) -> Option<AABB>;
 }
+
+impl Hit for Arc<Hit> {
+    fn hit(&self, r: Ray, t_min: f32, t_max: f32) -> Option<HitRecord> {
+        (**self).hit(r, t_min, t_max)
+    }
+    fn bounding_box(&self, t_min: f32, t_max: f32) -> Option<AABB> {
+        (**self).bounding_box(t_min, t_max)
+    }
+}

rtiow/src/material.rs

@@ -127,9 +127,15 @@ fn reflect(v: Vec3, n: Vec3) -> Vec3 {
 }
 
 impl Metal {
-    pub fn new(albedo: Vec3, fuzzy: f32) -> Metal {
+    pub fn new<V>(albedo: V, fuzzy: f32) -> Metal
+    where
+        V: Into<Vec3>,
+    {
         let fuzzy = fuzzy.min(1.);
-        Metal { albedo, fuzzy }
+        Metal {
+            albedo: albedo.into(),
+            fuzzy,
+        }
     }
 }
 

rtiow/src/renderer.rs

@@ -29,6 +29,7 @@ pub enum Model {
     CornellBox,
     CornellSmoke,
     PerlinDebug,
+    Final,
 }
 
 impl Model {
@@ -42,6 +43,7 @@ impl Model {
             Model::CornellBox => scenes::cornell_box::new(&opt),
             Model::CornellSmoke => scenes::cornell_smoke::new(&opt),
             Model::PerlinDebug => scenes::perlin_debug::new(&opt),
+            Model::Final => scenes::final_scene::new(&opt),
         }
     }
 }
@@ -67,6 +69,7 @@ impl str::FromStr for Model {
             "cornell_box" => Ok(Model::CornellBox),
             "cornell_smoke" => Ok(Model::CornellSmoke),
             "perlin_debug" => Ok(Model::PerlinDebug),
+            "final" => Ok(Model::Final),
             _ => Err(ModelParseError(s.to_owned())),
         }
     }
@@ -85,8 +88,8 @@ pub struct Opt {
     #[structopt(short = "s", long = "subsample", default_value = "8")]
     pub subsamples: usize,
     /// Select scene to render, one of: "bench", "book", "tutorial", "bvh", "test", "cornell_box",
-    /// "cornell_smoke", "perlin_debug"
-    #[structopt(long = "model", default_value = "perlin_debug")]
+    /// "cornell_smoke", "perlin_debug", "final"
+    #[structopt(long = "model", default_value = "final")]
     pub model: Model,
     /// Path to store pprof profile data, i.e. /tmp/cpuprofile.pprof
     #[structopt(long = "pprof", parse(from_os_str))]

rtiow/src/scenes/final_scene.rs

@@ -0,0 +1,164 @@
+use std::sync::Arc;
+
+use image;
+use rand;
+use rand::Rng;
+
+use camera::Camera;
+use constant_medium::ConstantMedium;
+use cuboid::Cuboid;
+use hitable::Hit;
+use hitable_list::HitableList;
+use kdtree::KDTree;
+use material::Dielectric;
+use material::DiffuseLight;
+use material::Lambertian;
+use material::Material;
+use material::Metal;
+use moving_sphere::MovingSphere;
+use rect::XZRect;
+use renderer::Opt;
+use renderer::Scene;
+use rotate::RotateY;
+use sphere::Sphere;
+use texture::ConstantTexture;
+use texture::ImageTexture;
+use texture::NoiseTexture;
+use translate::Translate;
+use vec3::Vec3;
+
+pub fn new(opt: &Opt) -> Scene {
+    let lookfrom = Vec3::new(478., 278., -600.);
+    let lookat = Vec3::new(278., 278., 0.);
+    let dist_to_focus = 10.;
+    let aperture = 0.1;
+    let t_min = 0.;
+    let t_max = 1.;
+    let camera = Camera::new(
+        lookfrom,
+        lookat,
+        Vec3::new(0., 1., 0.),
+        40.,
+        opt.width as f32 / opt.height as f32,
+        aperture,
+        dist_to_focus,
+        t_min,
+        t_max,
+    );
+
+    let nb = 20;
+
+    let mut rng = rand::thread_rng();
+    let mut boxlist: Vec<Box<Hit>> = Vec::with_capacity(10000);
+    let mut list: Vec<Box<Hit>> = Vec::new();
+    let white: Arc<Material> = Arc::new(Lambertian::new(ConstantTexture::new([0.73, 0.73, 0.73])));
+    let ground: Arc<Material> = Arc::new(Lambertian::new(ConstantTexture::new([0.48, 0.83, 0.53])));
+    for i in 0..nb {
+        for j in 0..nb {
+            let w = 100.;
+            let x0 = -1000. + i as f32 * w;
+            let z0 = -1000. + j as f32 * w;
+            let y0 = 0.;
+            let x1 = x0 + w;
+            let y1 = 100. * (rng.gen_range::<f32>(0., 1.) + 0.01);
+            let z1 = z0 + w;
+            boxlist.push(Box::new(Cuboid::new(
+                Vec3::new(x0, y0, z0),
+                Vec3::new(x1, y1, z1),
+                Arc::clone(&ground),
+            )));
+        }
+    }
+    list.push(Box::new(KDTree::new(boxlist, t_min, t_max)));
+
+    let light = DiffuseLight::new(ConstantTexture::new([7., 7., 7.]));
+    // Light in ceiling
+    list.push(Box::new(XZRect::new(123., 423., 147., 412., 554., light)));
+
+    let center = Vec3::new(400., 400., 200.);
+    // Moving brownish ball
+    list.push(Box::new(MovingSphere::new(
+        center,
+        center + Vec3::new(30., 0., 0.),
+        50.,
+        t_min,
+        t_max,
+        Lambertian::new(ConstantTexture::new([0.7, 0.3, 0.1])),
+    )));
+
+    // Glass ball, lower-left corner
+    list.push(Box::new(Sphere::new(
+        [260., 150., 45.],
+        50.,
+        Dielectric::new(1.5),
+    )));
+    // Metal ball lower-right corner
+    list.push(Box::new(Sphere::new(
+        [0., 150., 145.],
+        50.,
+        Metal::new([0.8, 0.8, 0.9], 10.0),
+    )));
+
+    // Blue smokey glass ball lower-left
+    let boundary: Arc<Hit> = Arc::new(Sphere::new([360., 150., 145.], 70., Dielectric::new(1.5)));
+    list.push(Box::new(Arc::clone(&boundary)));
+    list.push(Box::new(ConstantMedium::new(
+        Arc::clone(&boundary),
+        0.2,
+        ConstantTexture::new([0.2, 0.4, 0.9]),
+    )));
+
+    // General white mist over whole scene
+    let boundary: Arc<Hit> = Arc::new(Sphere::new([0., 0., 0.], 5000., Dielectric::new(1.5)));
+    list.push(Box::new(Arc::clone(&boundary)));
+    list.push(Box::new(ConstantMedium::new(
+        Arc::clone(&boundary),
+        0.0001,
+        ConstantTexture::new([1.0, 1.0, 1.0]),
+    )));
+
+    // Earth sphere
+    let world_image_bytes = include_bytes!("../../images/world.jpg");
+    let world = ImageTexture::new(image::load_from_memory(world_image_bytes).unwrap().to_rgb());
+    list.push(Box::new(Sphere::new(
+        Vec3::new(400., 200., 400.),
+        100.,
+        Lambertian::new(world),
+    )));
+
+    // Perlin noise sphere
+    let pertext = NoiseTexture::with_scale(0.1);
+    list.push(Box::new(Sphere::new(
+        [220., 280., 300.],
+        80.,
+        Lambertian::new(pertext),
+    )));
+
+    // White 'cube' made of 1000 spheres
+    let ns = 1000;
+    let mut boxlist: Vec<Box<Hit>> = Vec::with_capacity(1000);
+    for _ in 0..ns {
+        boxlist.push(Box::new(Sphere::new(
+            [
+                165. * rng.gen_range::<f32>(0., 1.),
+                165. * rng.gen_range::<f32>(0., 1.),
+                165. * rng.gen_range::<f32>(0., 1.),
+            ],
+            10.,
+            Arc::clone(&white),
+        )));
+    }
+    list.push(Box::new(Translate::new(
+        RotateY::new(KDTree::new(boxlist, t_min, t_max), 15.),
+        [-100., 270., 395.],
+    )));
+
+    Scene {
+        camera,
+        world: Box::new(HitableList::new(list)),
+        subsamples: opt.subsamples,
+        width: opt.width,
+        height: opt.height,
+        global_illumination: false,
+    }
+}

rtiow/src/scenes/mod.rs

@@ -3,6 +3,7 @@ pub mod book;
 pub mod bvh;
 pub mod cornell_box;
 pub mod cornell_smoke;
+pub mod final_scene;
 pub mod perlin_debug;
 pub mod test;
 pub mod tutorial;

rtiow/src/translate.rs

@@ -16,8 +16,14 @@ impl<H> Translate<H>
 where
     H: Hit,
 {
-    pub fn new(hitable: H, offset: Vec3) -> Translate<H> {
-        Translate { hitable, offset }
+    pub fn new<V>(hitable: H, offset: V) -> Translate<H>
+    where
+        V: Into<Vec3>,
+    {
+        Translate {
+            hitable,
+            offset: offset.into(),
+        }
     }
 }