Split crate into lib and bin chunks

I'm going to be doing some silly WASM and ES Module stuff here shortly, so I need a cdylib. This means I'll need the crate to actually have a library in it.
Delete the example images
2025-11-11 17:09:24 -06:00 · 2025-11-11 17:09:15 -06:00 · 2025-11-11 17:01:47 -06:00 · 2025-08-20 10:31:03 -05:00 · 2025-08-20 10:15:30 -05:00 · 2025-08-19 18:26:41 -05:00
17 changed files with 1133 additions and 468 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,10 +1,11 @@
 [package]
 name = "rustpt"
-version = "0.1.0"
-edition = "2021"
+version = "1.0.0"
+edition = "2024"
+license = "AGPL-3.0-only"

 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

 [dependencies]
-rand = { version = "0.8.5", features = ["small_rng"] }
-itertools = { version = "0.11.0" }
+rand = { version = "0.9", features = ["small_rng"] }
+itertools = { version = "0.14" }
--- a/661
+++ b/661
@@ -0,0 +1,661 @@
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+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
--- a/depth-of-field.png
+++ b/depth-of-field.png
--- a/dielectric_but_broken.png
+++ b/dielectric_but_broken.png
--- a/fascinating.png
+++ b/fascinating.png
--- a/final.png
+++ b/final.png
--- a/final_bad_distrib.png
+++ b/final_bad_distrib.png
--- a/hitrecord_misordering.png
+++ b/hitrecord_misordering.png
--- a/image_lambertian.png
+++ b/image_lambertian.png
--- a/image_shadowacne.png
+++ b/image_shadowacne.png
--- a/materials.png
+++ b/materials.png
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -0,0 +1,3 @@
+pub mod primitives;
+pub mod renderer;
+pub mod scene;
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,37 +1,22 @@
+use rustpt::primitives::{Vec2i, Vec3};
+use rustpt::scene::{Camera, Scene};

-mod primitives;
-mod scene;
-mod renderer;
-
-use crate::primitives::{
-    Vec2i,
-    Vec3,
-};
-use crate::scene::{
-    Camera,
-    Scene
-};
-
-use crate::renderer::{
-    Tile,
-    RenderProperties,
-};
+use rustpt::renderer::{RenderProperties, Tile};

 use rand::SeedableRng;
 use rand::rngs::SmallRng;

-
 fn main() {
    // image
    let aspect_ratio = 3.0 / 2.0;
    let image = Vec2i {
        x: 400,
-        y: (400.0 / aspect_ratio) as i32
+        y: (400.0 / aspect_ratio) as i32,
    };

    let render_config = RenderProperties {
        samples: 10,
-        bounces: 50
+        bounces: 50,
    };

    // random generator
@@ -40,21 +25,21 @@ fn main() {
    // Scene (now includes camera)
    let scene = Scene {
        camera: Camera::new(
-            Vec3::new(13.0, 2.0, 3.0), // lookfrom
-            Vec3::zero(), // lookat
-            Vec3::new(0.0, 1.0, 0.0), // vup
+            Vec3::new(13.0, 2.0, 3.0),  // lookfrom
+            Vec3::ZERO,                 // lookat
+            Vec3::UP,                   // vup
            20.0,
-            aspect_ratio, 
-            0.1, // aperture
+            aspect_ratio,
+            0.1,  // aperture
            10.0, // dist_to_focus
        ),
-        world: Scene::random_world(&mut small_rng)
+        world: Scene::random_world(&mut small_rng),
    };
-    
+
    // render
    // The render loop should now be a job submission mechanism
    // Iterate lines, submitting them as tasks to the thread.
-	println!("P3\n{} {}\n255", image.x, image.y);
+    println!("P3\n{} {}\n255", image.x, image.y);
    // TILE BASED RENDERER
    // let tile = Tile::render_tile(
    //     Rect { x: 0, y: 0, w: image.x, h: image.y },
--- a/src/primitives.rs
+++ b/src/primitives.rs
@@ -1,106 +1,110 @@
-
-use std::ops::{
-    Add,
-    AddAssign,
-    Sub,
-    SubAssign,
-    Mul,
-    MulAssign,
-    Div,
-    DivAssign,
-    Neg,
-};
 use std::fmt;
 use std::fmt::Display;
+use std::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Sub, SubAssign};

 use rand::Rng;
+use rand::distr::Uniform;
 use rand::rngs::SmallRng;
-use rand::distributions::Uniform;

 pub type Vec2i = Vec2<i32>;
 pub type Vec2f = Vec2<f32>;

-#[derive (Clone, Copy, PartialEq, PartialOrd, Debug)]
-pub struct Vec2<T>{
+#[derive(Clone, Copy, PartialEq, PartialOrd, Debug)]
+pub struct Vec2<T> {
    pub x: T,
    pub y: T,
 }

-
 impl Vec2<f32> {
    pub fn zero() -> Vec2<f32> {
-        Vec2{ x: 0.0, y: 0.0 }
+        Vec2 { x: 0.0, y: 0.0 }
    }

    pub fn ones() -> Vec2<f32> {
-        Vec2{ x: 1.0, y: 1.0 }
+        Vec2 { x: 1.0, y: 1.0 }
    }

    pub fn rand(srng: &mut SmallRng, distrib: Uniform<f32>) -> Vec2<f32> {
-        Vec2 { x: srng.sample(distrib), y: srng.sample(distrib) }
+        Vec2 {
+            x: srng.sample(distrib),
+            y: srng.sample(distrib),
+        }
    }
-
 }

-impl <T> Vec2<T> 
-where T: std::ops::Mul{
+impl<T> Vec2<T>
+where
+    T: std::ops::Mul,
+{
    pub fn new(x: T, y: T) -> Vec2<T> {
-        Vec2{x, y}
+        Vec2 { x, y }
    }
 }

-impl <T> Add for Vec2 <T>
-where T: std::ops::Add<Output = T>{
+impl<T> Add for Vec2<T>
+where
+    T: std::ops::Add<Output = T>,
+{
    type Output = Vec2<T>;
    fn add(self, other: Vec2<T>) -> Vec2<T> {
-        Vec2 { x: self.x + other.x, y: self.y + other.y }
+        Vec2 {
+            x: self.x + other.x,
+            y: self.y + other.y,
+        }
    }
 }

-impl <T> Mul for Vec2<T> 
-where T: std::ops::Mul<Output = T>{
+impl<T> Mul for Vec2<T>
+where
+    T: std::ops::Mul<Output = T>,
+{
    type Output = Vec2<T>;
    fn mul(self, other: Vec2<T>) -> Vec2<T> {
        Vec2 {
            x: self.x * other.x,
-            y: self.y * other.y
+            y: self.y * other.y,
        }
    }
 }

-impl Div<f32> for Vec2<f32>{
+impl Div<f32> for Vec2<f32> {
    type Output = Vec2<f32>;
    fn div(self, other: f32) -> Vec2<f32> {
        Vec2 {
-            x: 1.0/other * self.x,
-            y: 1.0/other * self.y
+            x: 1.0 / other * self.x,
+            y: 1.0 / other * self.y,
        }
    }
 }

-impl Div<i32> for Vec2<i32>{
+impl Div<i32> for Vec2<i32> {
    type Output = Vec2<i32>;
    fn div(self, other: i32) -> Vec2<i32> {
        Vec2 {
            x: self.x / other,
-            y: self.y / other
+            y: self.y / other,
        }
    }
 }

-impl <T> Div<Vec2<T>> for Vec2<T> 
-where T: std::ops::Div<Output = T>{
+impl<T> Div<Vec2<T>> for Vec2<T>
+where
+    T: std::ops::Div<Output = T>,
+{
    type Output = Vec2<T>;
    fn div(self, other: Vec2<T>) -> Vec2<T> {
        Vec2 {
            x: self.x / other.x,
-            y: self.y / other.y
+            y: self.y / other.y,
        }
    }
 }

-impl <T> Display for Vec2<T> 
-where T: Display { // nested type still needs to have Display
+impl<T> Display for Vec2<T>
+where
+    T: Display,
+{
+    // nested type still needs to have Display
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        let str = format!("{} {}", self.x, self.y);
        fmt.write_str(&str)
@@ -108,35 +112,38 @@ where T: Display { // nested type still needs to have Display
 }

 #[derive(Copy, Clone, PartialEq, PartialOrd, Debug)]
-pub struct Vec3{
-	pub x: f32,
-	pub y: f32,
-	pub z: f32,
+pub struct Vec3 {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
 }

-impl Vec3{
-	pub fn new(x: f32, y: f32, z: f32) -> Vec3{
-		Vec3{x, y, z}
-	}
-
-    pub fn zero() -> Vec3{
-        Vec3{
-            x: 0.0,
-            y: 0.0,
-            z: 0.0,
-        }
+impl Vec3 {
+    pub fn new(x: f32, y: f32, z: f32) -> Vec3 {
+        Vec3 { x, y, z }
    }

-    pub fn ones() -> Vec3{
-        Vec3 {
-            x: 1.0,
-            y: 1.0,
-            z: 1.0
-        }
-    }
+    pub const ZERO: Self = Vec3 {
+        x: 0.0,
+        y: 0.0,
+        z: 0.0,
+    };
+
+    pub const ONES: Self = Vec3 {
+        x: 1.0,
+        y: 1.0,
+        z: 1.0,
+    };
+
+    /// "Up" is considered to be positive-y
+    pub const UP: Self = Vec3 {
+        x: 0.0,
+        y: 1.0,
+        z: 0.0,
+    };

    pub fn rand(srng: &mut SmallRng, distrib: Uniform<f32>) -> Vec3 {
-        Vec3{
+        Vec3 {
            x: srng.sample(distrib),
            y: srng.sample(distrib),
            z: srng.sample(distrib),
@@ -144,11 +151,14 @@ impl Vec3{
    }

    pub fn rand_in_unit_sphere(srng: &mut SmallRng) -> Vec3 {
-        let distrib = Uniform::new(-1.0, 1.0);
+        let distrib = Uniform::new(-1.0, 1.0).unwrap();
        loop {
            let p = Vec3::rand(srng, distrib);
-            if p.length_squared() >= 1.0 { continue; }
-            else { return p; }
+            if p.length_squared() >= 1.0 {
+                continue;
+            } else {
+                return p;
+            }
        }
    }

@@ -156,55 +166,54 @@ impl Vec3{
        let distrib = Uniform::new(-1.0, 1.0);
        loop {
            let p = Vec3 {
-                x: srng.sample(distrib),
-                y: srng.sample(distrib),
+                x: srng.sample(distrib.unwrap()),
+                y: srng.sample(distrib.unwrap()),
                z: 0.0,
            };
-            if p.length_squared() >= 1.0 { continue; }
-            else { return p; }
+            if p.length_squared() >= 1.0 {
+                continue;
+            } else {
+                return p;
+            }
        }
    }

    pub fn rand_unit_vector(srng: &mut SmallRng) -> Vec3 {
-        return Vec3::as_unit(Vec3::rand_in_unit_sphere(srng));
+        Vec3::as_unit(Vec3::rand_in_unit_sphere(srng))
    }

-	pub fn length(&self) -> f32 {
-		self.length_squared().sqrt()
-	}
+    pub fn length(&self) -> f32 {
+        self.length_squared().sqrt()
+    }
+
+    pub fn length_squared(&self) -> f32 {
+        (self.x * self.x) + (self.y * self.y) + (self.z * self.z)
+    }

-	pub fn length_squared(&self) -> f32 {
-		(self.x * self.x) + (self.y * self.y) + (self.z * self.z)
-	}
-    
    // roughly equivalent to the `void write_color(...)` in the book
    pub fn print_ppm(&self, samples_per_pixel: u32) -> String {
-
        let scale = 1.0 / samples_per_pixel as f32;
-        
+
        // now with gamma correction
        let r = (self.x * scale).sqrt();
        let g = (self.y * scale).sqrt();
        let b = (self.z * scale).sqrt();
-        
-        let ir = (r.clamp( 0.0, 0.999) * 256.0) as i32;
-        let ig = (g.clamp( 0.0, 0.999) * 256.0) as i32;
-        let ib = (b.clamp( 0.0, 0.999) * 256.0) as i32;
+
+        let ir = (r.clamp(0.0, 0.999) * 256.0) as i32;
+        let ig = (g.clamp(0.0, 0.999) * 256.0) as i32;
+        let ib = (b.clamp(0.0, 0.999) * 256.0) as i32;
        format!("{} {} {}", ir, ig, ib)
    }
-    
+
    pub fn near_zero(&self) -> bool {
        let epsilon: f32 = 1e-4;
-        return 
-            self.x.abs() < epsilon &&
-            self.y.abs() < epsilon &&
-            self.z.abs() < epsilon
+        self.x.abs() < epsilon && self.y.abs() < epsilon && self.z.abs() < epsilon
    }
-    
+
    pub fn reflect(v: Vec3, n: Vec3) -> Vec3 {
-        return v - n * Vec3::dot(v, n) * 2.0;
+        v - n * Vec3::dot(v, n) * 2.0
    }
-    
+
    pub fn refract(uv: Vec3, n: Vec3, etai_over_etat: f32) -> Vec3 {
        let cos_theta = Vec3::dot(-uv, n).min(1.0);
        let r_out_perp = (uv + n * cos_theta) * etai_over_etat;
@@ -212,156 +221,153 @@ impl Vec3{
        r_out_perp + r_out_parallel
    }

-    pub fn dot(left: Vec3, right: Vec3) -> f32{
-        left.x * right.x +
-        left.y * right.y +
-        left.z * right.z
+    pub fn dot(left: Vec3, right: Vec3) -> f32 {
+        left.x * right.x + left.y * right.y + left.z * right.z
    }
-    
-    pub fn cross(u: Vec3, v: Vec3) -> Vec3{
-        Vec3{
+
+    pub fn cross(u: Vec3, v: Vec3) -> Vec3 {
+        Vec3 {
            x: u.y * v.z - u.z * v.y,
            y: u.z * v.x - u.x * v.z,
-            z: u.x * v.y - u.y * v.x
+            z: u.x * v.y - u.y * v.x,
        }
    }
-    
+
    pub fn as_unit(v: Vec3) -> Vec3 {
        let len = v.length();
        v / len
    }
-
 }
 impl Add for Vec3 {
-	type Output = Vec3;
-	fn add(self, other: Vec3) -> Vec3 {
-		Vec3{
-			x: self.x + other.x,
-			y: self.y + other.y,
-			z: self.z + other.z,
-		}
-	}
+    type Output = Vec3;
+    fn add(self, other: Vec3) -> Vec3 {
+        Vec3 {
+            x: self.x + other.x,
+            y: self.y + other.y,
+            z: self.z + other.z,
+        }
+    }
 }

 impl AddAssign for Vec3 {
-	fn add_assign(&mut self, other: Vec3){
-		*self = Self {
-			x: self.x + other.x,
-			y: self.y + other.y,
-			z: self.z + other.z
-		};
-	}
+    fn add_assign(&mut self, other: Vec3) {
+        *self = Self {
+            x: self.x + other.x,
+            y: self.y + other.y,
+            z: self.z + other.z,
+        };
+    }
 }

 impl Sub for Vec3 {
-	type Output = Vec3;
-	fn sub(self, other: Vec3) -> Vec3 {
-		Vec3 {
-			x: self.x - other.x,
-			y: self.y - other.y,
-			z: self.z - other.z,
-		}
-	}
+    type Output = Vec3;
+    fn sub(self, other: Vec3) -> Vec3 {
+        Vec3 {
+            x: self.x - other.x,
+            y: self.y - other.y,
+            z: self.z - other.z,
+        }
+    }
 }

 impl SubAssign for Vec3 {
-	fn sub_assign(&mut self, other: Vec3){
-		*self = Self {
-			x: self.x - other.x,
-			y: self.y - other.y,
-			z: self.z - other.z
-		};
-	}
+    fn sub_assign(&mut self, other: Vec3) {
+        *self = Self {
+            x: self.x - other.x,
+            y: self.y - other.y,
+            z: self.z - other.z,
+        };
+    }
 }

 impl Mul<Vec3> for Vec3 {
-	type Output = Vec3;
-	fn mul(self, other: Vec3) -> Vec3 {
-		Vec3 {
-			x: self.x * other.x,
-			y: self.y * other.y,
-			z: self.z * other.z,
-		}
-	}
+    type Output = Vec3;
+    fn mul(self, other: Vec3) -> Vec3 {
+        Vec3 {
+            x: self.x * other.x,
+            y: self.y * other.y,
+            z: self.z * other.z,
+        }
+    }
 }

-impl Mul<f32> for Vec3{
-	type Output = Vec3;
-	fn mul(self, other: f32) -> Vec3 {
-		Vec3 {
-			x: self.x * other,
-			y: self.y * other,
-			z: self.z * other,
-		}
-	}
+impl Mul<f32> for Vec3 {
+    type Output = Vec3;
+    fn mul(self, other: f32) -> Vec3 {
+        Vec3 {
+            x: self.x * other,
+            y: self.y * other,
+            z: self.z * other,
+        }
+    }
 }

 impl MulAssign<Vec3> for Vec3 {
-	fn mul_assign(&mut self, other: Vec3){
-		*self = Self {
-			x: self.x * other.x,
-			y: self.y * other.y,
-			z: self.z * other.z
-		};
-	}
+    fn mul_assign(&mut self, other: Vec3) {
+        *self = Self {
+            x: self.x * other.x,
+            y: self.y * other.y,
+            z: self.z * other.z,
+        };
+    }
 }

-impl MulAssign<f32> for Vec3{
-     fn mul_assign(&mut self, other: f32){
-		*self = Self {
-			x: self.x * other,
-			y: self.y * other,
-			z: self.z * other
-		};
-	}   
+impl MulAssign<f32> for Vec3 {
+    fn mul_assign(&mut self, other: f32) {
+        *self = Self {
+            x: self.x * other,
+            y: self.y * other,
+            z: self.z * other,
+        };
+    }
 }

 impl Div<Vec3> for Vec3 {
-	type Output = Vec3;
-	fn div(self, other: Vec3) -> Vec3 {
-		Vec3 {
-			x: self.x / other.x,
-			y: self.y / other.y,
-			z: self.z / other.z,
-		}
-	}
+    type Output = Vec3;
+    fn div(self, other: Vec3) -> Vec3 {
+        Vec3 {
+            x: self.x / other.x,
+            y: self.y / other.y,
+            z: self.z / other.z,
+        }
+    }
 }

 impl Div<f32> for Vec3 {
-	type Output = Vec3;
-	fn div(self, other: f32) -> Vec3 {
-		Vec3 {
-			x: 1.0/other * self.x,
-			y: 1.0/other * self.y,
-			z: 1.0/other * self.z,
-		}
-	}
+    type Output = Vec3;
+    fn div(self, other: f32) -> Vec3 {
+        Vec3 {
+            x: 1.0 / other * self.x,
+            y: 1.0 / other * self.y,
+            z: 1.0 / other * self.z,
+        }
+    }
 }

 impl DivAssign<Vec3> for Vec3 {
-	fn div_assign(&mut self, other: Vec3){
-		*self = Self {
-			x: self.x / other.x,
-			y: self.y / other.y,
-			z: self.z / other.z
-		};
-	}
+    fn div_assign(&mut self, other: Vec3) {
+        *self = Self {
+            x: self.x / other.x,
+            y: self.y / other.y,
+            z: self.z / other.z,
+        };
+    }
 }

 impl DivAssign<f32> for Vec3 {
-	fn div_assign(&mut self, other: f32){
-		*self = Self {
-			x: self.x / other,
-			y: self.y / other,
-			z: self.z / other
-		};
-	}
+    fn div_assign(&mut self, other: f32) {
+        *self = Self {
+            x: self.x / other,
+            y: self.y / other,
+            z: self.z / other,
+        };
+    }
 }

-impl Neg for Vec3{
+impl Neg for Vec3 {
    type Output = Self;
    fn neg(self) -> Self::Output {
-        Vec3{
+        Vec3 {
            x: -self.x,
            y: -self.y,
            z: -self.z,
@@ -370,27 +376,26 @@ impl Neg for Vec3{
 }

 impl Display for Vec3 {
-	fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-		let str = format!("{} {} {}", self.x, self.y, self.z);
-		fmt.write_str(&str)?;
-		Ok(())
-		
-	}
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        let str = format!("{} {} {}", self.x, self.y, self.z);
+        fmt.write_str(&str)?;
+        Ok(())
+    }
 }

 #[derive(Copy, Clone)]
-pub struct Ray{
+pub struct Ray {
    pub orig: Vec3,
    pub dir: Vec3,
 }

-impl Ray{
+impl Ray {
    pub fn at(&self, t: f32) -> Vec3 {
-        self.orig + self.dir*t
+        self.orig + self.dir * t
    }
 }

-#[derive (Copy, Clone)]
+#[derive(Copy, Clone)]
 pub struct Rect {
    pub x: i32,
    pub y: i32,
@@ -398,11 +403,11 @@ pub struct Rect {
    pub h: i32,
 }

-impl Rect{
+impl Rect {
    pub fn pos(&self) -> Vec2i {
        Vec2i {
            x: self.x,
-            y: self.y, 
+            y: self.y,
        }
    }

@@ -415,188 +420,188 @@ impl Rect{
 }

 #[cfg(test)]
-mod test{
+mod test {
    use super::*;

    #[test]
-    fn test_add(){
+    fn test_add() {
        let v1 = Vec3::new(1.0, 1.0, 0.0);
        let v2 = Vec3::new(0.0, 0.0, 1.0);

        let expected = Vec3::new(1.0, 1.0, 1.0);

-        assert_eq!( v1+v2, expected );
+        assert_eq!(v1 + v2, expected);
    }

    #[test]
-    fn test_add_assign(){
+    fn test_add_assign() {
        let mut v1 = Vec3::new(0.0, 1.0, 1.0);
        let v2 = Vec3::new(1.0, 0.0, 0.0);

        let expected = Vec3::new(1.0, 1.0, 1.0);

-        v1+=v2;
-        assert_eq!( v1, expected );
+        v1 += v2;
+        assert_eq!(v1, expected);
    }

    #[test]
-    fn test_sub(){
+    fn test_sub() {
        let v1 = Vec3::new(1.0, 1.0, 0.0);
        let v2 = Vec3::new(0.0, 0.0, 1.0);

        let expected = Vec3::new(1.0, 1.0, -1.0);

-        assert_eq!( v1-v2, expected );
+        assert_eq!(v1 - v2, expected);
    }

    #[test]
-    fn test_sub_assign(){
+    fn test_sub_assign() {
        let mut v1 = Vec3::new(0.0, 1.0, 1.0);
        let v2 = Vec3::new(1.0, 0.0, 0.0);

        let expected = Vec3::new(-1.0, 1.0, 1.0);

-        v1-=v2;
-        assert_eq!( v1, expected );
+        v1 -= v2;
+        assert_eq!(v1, expected);
    }

    #[test]
-    fn test_mul_vec(){
+    fn test_mul_vec() {
        let v1 = Vec3::new(0.1, 0.5, 0.7);
        let v2 = Vec3::new(1.0, 2.0, 1.0);

        let expected = Vec3::new(0.1, 1.0, 0.7);

-        assert_eq!( v1*v2, expected );
+        assert_eq!(v1 * v2, expected);
    }

    #[test]
-    fn test_mul_float(){
+    fn test_mul_float() {
        let v1 = Vec3::new(0.1, 0.5, 0.7);
        let f1 = 0.5;

        let expected = Vec3::new(0.05, 0.25, 0.35);

-        assert_eq!( v1*f1, expected );
+        assert_eq!(v1 * f1, expected);
    }

    #[test]
-    fn test_mul_vec_assign(){
+    fn test_mul_vec_assign() {
        let mut v1 = Vec3::new(0.1, 0.5, 0.7);
        let v2 = Vec3::new(1.0, 2.0, 1.0);

        let expected = Vec3::new(0.1, 1.0, 0.7);

-        v1*=v2;
-        assert_eq!( v1, expected );
+        v1 *= v2;
+        assert_eq!(v1, expected);
    }

    #[test]
-    fn test_mul_float_assign(){
+    fn test_mul_float_assign() {
        let mut v1 = Vec3::new(0.1, 0.5, 0.7);
        let f1 = 0.5;

        let expected = Vec3::new(0.05, 0.25, 0.35);
-        
-        v1*=f1;
-        assert_eq!( v1, expected );
+
+        v1 *= f1;
+        assert_eq!(v1, expected);
    }

    #[test]
-    fn test_div_vec(){
+    fn test_div_vec() {
        let v1 = Vec3::new(0.1, 0.5, 0.7);
        let v2 = Vec3::new(0.5, 2.0, 1.0);

        let expected = Vec3::new(0.2, 0.25, 0.7);

-        assert_eq!( v1/v2, expected );
+        assert_eq!(v1 / v2, expected);
    }

    #[test]
-    fn test_div_float(){
+    fn test_div_float() {
        let v1 = Vec3::new(0.1, 0.5, 0.7);
        let f1 = 0.5;

        let expected = Vec3::new(0.2, 1.0, 1.4);

-        assert_eq!( v1/f1, expected );
+        assert_eq!(v1 / f1, expected);
    }

    #[test]
-    fn test_div_vec_assign(){
+    fn test_div_vec_assign() {
        let mut v1 = Vec3::new(0.1, 0.5, 0.7);
        let v2 = Vec3::new(1.0, 2.0, 1.0);

        let expected = Vec3::new(0.1, 0.25, 0.7);

-        v1/=v2;
-        assert_eq!( v1, expected );
+        v1 /= v2;
+        assert_eq!(v1, expected);
    }

    #[test]
-    fn test_div_float_assign(){
+    fn test_div_float_assign() {
        let mut v1 = Vec3::new(0.1, 0.5, 0.7);
        let f1 = 0.5;

        let expected = Vec3::new(0.2, 1., 1.4);
-        
-        v1/=f1;
-        assert_eq!( v1, expected );
+
+        v1 /= f1;
+        assert_eq!(v1, expected);
    }
-    
+
    #[test]
-    fn test_length_squared(){
+    fn test_length_squared() {
        let v = Vec3::new(2.0, 0.0, 2.0);
        let len = v.length_squared();
        assert_eq!(len, 8.0);
    }
-    
+
    #[test]
-    fn test_length(){
+    fn test_length() {
        let v = Vec3::new(3.0, 4.0, 0.0);
        let len = v.length();
        assert_eq!(len, 5.0)
    }

    #[test]
-    fn test_dot_perpendicular(){
+    fn test_dot_perpendicular() {
        let v1 = Vec3::new(1.0, 0.0, 0.0);
        let v2 = Vec3::new(0.0, 1.0, 0.0);
        assert_eq!(Vec3::dot(v1, v2), 0.0);
    }
-    
+
    #[test]
-    fn test_dot_parallel(){
+    fn test_dot_parallel() {
        let v1 = Vec3::new(1.0, 0.0, 0.0);
        let v2 = Vec3::new(1.0, 0.0, 0.0);
        assert_eq!(Vec3::dot(v1, v2), 1.0);
    }

    #[test]
-    fn test_dot_acute(){
+    fn test_dot_acute() {
        let v1 = Vec3::new(1.0, 1.0, 0.0);
        let v2 = Vec3::new(0.5, 1.0, 0.0);
        assert_eq!(Vec3::dot(v1, v2), 1.5);
    }

    #[test]
-    fn test_dot_obtuse(){
+    fn test_dot_obtuse() {
        let v1 = Vec3::new(1.0, 1.0, 0.0);
        let v2 = Vec3::new(0.5, -1.0, 0.0);
        assert_eq!(Vec3::dot(v1, v2), -0.5);
    }
-    
+
    #[test]
-    fn test_cross_perpendicular(){
+    fn test_cross_perpendicular() {
        let v1 = Vec3::new(1.0, 0.0, 0.0);
        let v2 = Vec3::new(0.0, 1.0, 0.0);

        let expected = Vec3::new(0.0, 0.0, 1.0);
        assert_eq!(Vec3::cross(v1, v2), expected);
    }
-    
+
    #[test]
-    fn test_cross_parallel(){
+    fn test_cross_parallel() {
        let v1 = Vec3::new(1.0, 0.0, 0.0);
        let v2 = Vec3::new(1.0, 0.0, 0.0);

@@ -606,7 +611,7 @@ mod test{
    }

    #[test]
-    fn test_cross_111(){
+    fn test_cross_111() {
        let v1 = Vec3::new(1.0, 1.0, 1.0);
        let v2 = Vec3::new(0.0, 1.0, 0.0);

@@ -616,32 +621,32 @@ mod test{
    }

    #[test]
-    fn test_unit_shorten(){
+    fn test_unit_shorten() {
        let v = Vec3::new(2.0, 0.0, 0.0);
        let expected = Vec3::new(1.0, 0.0, 0.0);
-        
+
        assert_eq!(Vec3::as_unit(v), expected);
    }

    #[test]
-    fn test_unit_lengthen(){
+    fn test_unit_lengthen() {
        let v = Vec3::new(0.5, 0.0, 0.0);
        let expected = Vec3::new(1.0, 0.0, 0.0);
-        
+
        assert_eq!(Vec3::as_unit(v), expected);
    }

    #[test]
-    fn test_unit_111(){
+    fn test_unit_111() {
        let v = Vec3::new(1.0, 1.0, 1.0);
-        let expected = Vec3::new(0.577350269,0.577350269,0.577350269);
+        let expected = Vec3::new(0.577350269, 0.577350269, 0.577350269);

        assert!(Vec3::as_unit(v) <= expected * 1.001); // within very small under-estimate
        assert!(Vec3::as_unit(v) >= expected * 0.999); // within very small over-estimate
    }

    #[test]
-    fn test_reflect_flat(){
+    fn test_reflect_flat() {
        let ray = Vec3::new(1.0, 0.0, 0.0);
        let normal = Vec3::new(-1.0, 0.0, 0.0);

@@ -649,24 +654,22 @@ mod test{
        let expected = Vec3::new(-1.0, 0.0, 0.0);
        assert!(refl == expected);
    }
-    
+
    #[test]
-    fn test_reflect_flat_back(){
+    fn test_reflect_flat_back() {
        let ray = Vec3::new(1.0, 0.0, 0.0);
        let normal = Vec3::new(1.0, 0.0, 0.0);

        let refl = Vec3::reflect(ray, normal);
        let expected = Vec3::new(-1.0, 0.0, 0.0);
        assert!(refl == expected);
-
    }

    #[test]
-    fn test_reflect_45(){
+    fn test_reflect_45() {
        let ray = Vec3::new(1.0, 0.0, 0.0);
        let normal = Vec3::as_unit(Vec3::new(-1.0, 1.0, 0.0));

-        
        let refl = Vec3::reflect(ray, normal);
        let expected = Vec3::new(0.0, 1.0, 0.0);
        let diff = refl - expected;
@@ -675,15 +678,12 @@ mod test{
    }

    #[test]
-    fn check_lerp(){
-        let ray = Ray{
+    fn check_lerp() {
+        let ray = Ray {
            orig: Vec3::new(0.0, 0.0, 0.0),
-            dir: Vec3::new(1.0, 1.0, 0.0)
+            dir: Vec3::new(1.0, 1.0, 0.0),
        };
        let half = ray.at(0.5);
-        assert_eq!(
-            half,
-            Vec3::new(0.5, 0.5, 0.0)
-        );
+        assert_eq!(half, Vec3::new(0.5, 0.5, 0.0));
    }
 }
--- a/src/renderer.rs
+++ b/src/renderer.rs
@@ -1,21 +1,15 @@
-
-use crate::primitives::{
-    Vec2i,
-    Vec2f,
-    Vec3,
-    Ray,
-    Rect,
-};
-use crate::scene::{
-    Hittable,
-    Scene,
-};
+use crate::primitives::{Ray, Rect, Vec2f, Vec2i, Vec3};
+use crate::scene::{Hittable, Scene};

 use rand::rngs::SmallRng;

 use itertools::{self, Itertools};

-const SKY_COLOR: Vec3 = Vec3 { x: 0.5, y: 0.7, z: 1.0};
+const SKY_COLOR: Vec3 = Vec3 {
+    x: 0.5,
+    y: 0.7,
+    z: 1.0,
+};

 pub struct RenderProperties {
    pub samples: u32, // samples are averaged results over a pixel
@@ -28,65 +22,52 @@ fn to_uv(coord: Vec2i, img_size: Vec2i) -> Vec2f {
    Vec2f::new(u, v)
 }

-fn ray_color(
-    r: Ray, surface: &Hittable, depth: u32,
-    rng: &mut SmallRng,
-) -> Vec3 {
+fn ray_color(r: Ray, surface: &Hittable, depth: u32, rng: &mut SmallRng) -> Vec3 {
    // recursion guard
    if depth == 0 {
-        return Vec3::zero();
+        return Vec3::ZERO;
    }
-    
+
    // cast a ray, interrogate hit record
-    if let Some(record) = surface.hit(r, 0.001, f32::INFINITY){
+    if let Some(record) = surface.hit(r, 0.001, f32::INFINITY) {
        let mut scattered = Ray {
-            orig: Vec3::zero(),
-            dir: Vec3::zero(),
+            orig: Vec3::ZERO,
+            dir: Vec3::ZERO,
        };
-        let mut attenuation = Vec3::zero();
-        if record.material.scatter(
-            r,
-            &record,
-            &mut attenuation,
-            &mut scattered,
-            rng
-        ) {
-            return attenuation * ray_color(
-                scattered, surface, depth-1, rng
-            );
+        let mut attenuation = Vec3::ZERO;
+        if record
+            .material
+            .scatter(r, &record, &mut attenuation, &mut scattered, rng)
+        {
+            return attenuation * ray_color(scattered, surface, depth - 1, rng);
        }
    } // TODO: explicit else block
    // Rust gets angry about the inner if{} block because it evaluates to ()
    // when the else path is taken. This is a problem for a function
    // that returns Vec3 and not ().

-    { // when nothing is struck, return sky color
-        let unitdir = Vec3::as_unit(r.dir);
-        let t = 0.5 * (unitdir.y + 1.0);
-        return Vec3::ones() * (1.0 - t) + SKY_COLOR * t
-    }
+    // when nothing is struck, return sky color
+    let unitdir = Vec3::as_unit(r.dir);
+    let t = 0.5 * (unitdir.y + 1.0);
+    Vec3::ONES * (1.0 - t) + SKY_COLOR * t
 }

 fn sample_pixel(
-    coord: Vec2i, // location in image/screen space
-    scene: &Scene,  // scene we're drawing
+    coord: Vec2i,  // location in image/screen space
+    scene: &Scene, // scene we're drawing
    render_props: &RenderProperties,
    img_size: Vec2i,
    // Supplied by the execution environment (the thread)
    rng: &mut SmallRng,
-) -> Vec3{
-    (0..render_props.samples)
-    .fold(
-        Vec3::zero(),
-        |color, _sample| -> Vec3 {
-            let uv = to_uv(coord, img_size);
-            let ray = scene.camera.get_ray(uv.x, uv.y, rng);
-            if ray.dir.x.is_nan() {
-                panic!("Ray dir.x is NAN");
-            }
-            color + ray_color(ray, &scene.world, render_props.bounces, rng)
+) -> Vec3 {
+    (0..render_props.samples).fold(Vec3::ZERO, |color, _sample| -> Vec3 {
+        let uv = to_uv(coord, img_size);
+        let ray = scene.camera.get_ray(uv.x, uv.y, rng);
+        if ray.dir.x.is_nan() {
+            panic!("Ray dir.x is NAN");
        }
-    )
+        color + ray_color(ray, &scene.world, render_props.bounces, rng)
+    })
 }

 pub struct Tile {
@@ -96,28 +77,31 @@ pub struct Tile {

 impl Tile {
    pub fn render_tile(
-        bounds: Rect,       // bounds of the region to render
-        img_size: Vec2i,    // final image resolution (needed for proper UV mapping)
+        bounds: Rect,    // bounds of the region to render
+        img_size: Vec2i, // final image resolution (needed for proper UV mapping)
        scene: &Scene,
        properties: &RenderProperties, // TODO: Place image size in render properties?
        rng: &mut SmallRng,
    ) -> Self {
-        let pixel_iter = (bounds.y..(bounds.y + bounds.h))
-            .cartesian_product( bounds.x..(bounds.x + bounds.w));
-        let pixels = pixel_iter.map(
-            |coord| -> Vec3 {
+        let pixel_iter =
+            (bounds.y..(bounds.y + bounds.h)).cartesian_product(bounds.x..(bounds.x + bounds.w));
+        let pixels = pixel_iter
+            .map(|coord| -> Vec3 {
                sample_pixel(
-                    Vec2i{x: coord.1, y: coord.0},
+                    Vec2i {
+                        x: coord.1,
+                        y: coord.0,
+                    },
                    scene,
                    properties,
                    img_size,
                    rng,
                )
-            }
-        ).collect();
+            })
+            .collect();
        Self {
            _bounds: bounds,
-            pixels
+            pixels,
        }
    }
    pub fn render_line(
@@ -128,11 +112,16 @@ impl Tile {
        rng: &mut SmallRng, // rng utils
    ) -> Self {
        Tile::render_tile(
-            Rect{ x: 0, y, w: img_size.x, h: 1 },
+            Rect {
+                x: 0,
+                y,
+                w: img_size.x,
+                h: 1,
+            },
            img_size,
            scene,
            properties,
-            rng
+            rng,
        )
    }
 }
--- a/src/scene.rs
+++ b/src/scene.rs
@@ -1,11 +1,10 @@
-
-use crate::primitives::{Vec3, Ray};
+use crate::primitives::{Ray, Vec3};

 use rand::Rng;
+use rand::distr::Uniform;
 use rand::rngs::SmallRng;
-use rand::distributions::Uniform;

-pub struct HitRecord{
+pub struct HitRecord {
    pub p: Vec3,
    pub normal: Vec3,
    pub material: Material,
@@ -13,40 +12,53 @@ pub struct HitRecord{
    pub front_face: bool,
 }

-impl HitRecord{
-    pub fn set_face_normal(&mut self, r: Ray, outward_normal: Vec3) -> (){
+impl HitRecord {
+    pub fn set_face_normal(&mut self, r: Ray, outward_normal: Vec3) {
        self.front_face = Vec3::dot(r.dir, outward_normal) < 0.0;
-        self.normal = if self.front_face { outward_normal } else { -outward_normal };
+        self.normal = if self.front_face {
+            outward_normal
+        } else {
+            -outward_normal
+        };
    }
 }

-#[derive (Clone)]
+#[derive(Clone)]
 pub enum Hittable {
-    Sphere { center: Vec3, radius: f32, material: Material },
-    HittableList { hittables: Vec<Hittable> }
+    Sphere {
+        center: Vec3,
+        radius: f32,
+        material: Material,
+    },
+    HittableList {
+        hittables: Vec<Hittable>,
+    },
 }

 impl Hittable {
    pub fn hit(&self, r: Ray, t_min: f32, t_max: f32) -> Option<HitRecord> {
        match self {
-            Hittable::HittableList { hittables } => {
-                hittables.iter()
-                .map( |obj| -> Option<HitRecord> {
-                    obj.hit(r, t_min, t_max)
-                }).filter(|obj| obj.is_some())
+            Hittable::HittableList { hittables } => hittables
+                .iter()
+                .map(|obj| -> Option<HitRecord> { obj.hit(r, t_min, t_max) })
+                .filter(|obj| obj.is_some())
                .min_by(|lhs, rhs| {
                    let lhs = lhs.as_ref().unwrap();
                    let rhs = rhs.as_ref().unwrap();
                    lhs.t.partial_cmp(&rhs.t).expect("Couldn't compare??")
-                }).unwrap_or(None)
-            }
+                })
+                .unwrap_or(None),

-            Hittable::Sphere { center, radius, material } => {
+            Hittable::Sphere {
+                center,
+                radius,
+                material,
+            } => {
                let oc = r.orig - *center;
                let a = r.dir.length_squared();
                let half_b = Vec3::dot(oc, r.dir);
                let c = oc.length_squared() - radius * radius;
-                let discriminant = half_b*half_b - a*c;
+                let discriminant = half_b * half_b - a * c;

                if discriminant < 0.0 {
                    return None;
@@ -61,7 +73,7 @@ impl Hittable {
                        return None;
                    }
                }
-                let mut record = HitRecord{
+                let mut record = HitRecord {
                    p: r.at(root),
                    normal: (r.at(root) - *center) / *radius,
                    material: *material,
@@ -81,11 +93,10 @@ impl Hittable {
    }
 }

-
 #[derive(Copy, Clone, Debug)]
-pub enum Material{
+pub enum Material {
    Lambertian { albedo: Vec3 },
-    Metal { albedo:Vec3, fuzz: f32 },
+    Metal { albedo: Vec3, fuzz: f32 },
    Dielectric { index_refraction: f32 },
 }

@@ -103,55 +114,60 @@ impl Material {
                let scatter_dir = rec.normal + Vec3::rand_unit_vector(srng);
                // The compiler might be smart enough to compute this ^^^ just once. In which case,
                // I don't need to do this weird dance. Oh well. It'll work.
-                let scatter_dir = if scatter_dir.near_zero() {  // if near zero,
-                    rec.normal                                  // replace with normal
+                let scatter_dir = if scatter_dir.near_zero() {
+                    // if near zero,
+                    rec.normal // replace with normal
                } else {
-                    scatter_dir                                 // else preserve current
+                    scatter_dir // else preserve current
                };

                //TODO: Revisit this out-parameter pattern
                // It's a side effect of C++'s obtuse move semantics (and the RTIOW author not
                // using them at all)
-                *scattered = Ray{
+                *scattered = Ray {
                    orig: rec.p,
-                    dir: scatter_dir
+                    dir: scatter_dir,
                };
                *attenuation = *albedo; // deref on both sides? Wacky
-                return true;
-            },
+                true
+            }
            Material::Metal { albedo, fuzz } => {
-                let reflected = Vec3::reflect(
-                    Vec3::as_unit(ray_in.dir),
-                    rec.normal
-                );
-                *scattered = Ray{
+                let reflected = Vec3::reflect(Vec3::as_unit(ray_in.dir), rec.normal);
+                *scattered = Ray {
                    orig: rec.p,
                    dir: reflected + Vec3::rand_in_unit_sphere(srng) * *fuzz,
                };
                *attenuation = *albedo;
-                return Vec3::dot(scattered.dir, rec.normal) > 0.0;
-            },
+                Vec3::dot(scattered.dir, rec.normal) > 0.0
+            }
            Material::Dielectric { index_refraction } => {
-                *attenuation = Vec3::ones();
-                let refraction_ratio = if rec.front_face { 1.0 / index_refraction } else { *index_refraction };
-                
+                *attenuation = Vec3::ONES;
+                let refraction_ratio = if rec.front_face {
+                    1.0 / index_refraction
+                } else {
+                    *index_refraction
+                };
+
                let unit_direction = Vec3::as_unit(ray_in.dir);
                let cos_theta = Vec3::dot(-unit_direction, rec.normal).min(1.0);
                let sin_theta = (1.0 - cos_theta * cos_theta).sqrt();

                let cannot_refract = refraction_ratio * sin_theta > 1.0;
-                let distrib_zero_one = Uniform::new(0.0, 1.0);
-                let direction = if cannot_refract || Material::reflectance(cos_theta, refraction_ratio) > srng.sample(distrib_zero_one) {
+                let distrib_zero_one = Uniform::new(0.0, 1.0).unwrap();
+                let direction = if cannot_refract
+                    || Material::reflectance(cos_theta, refraction_ratio)
+                        > srng.sample(distrib_zero_one)
+                {
                    Vec3::reflect(unit_direction, rec.normal)
                } else {
                    Vec3::refract(unit_direction, rec.normal, refraction_ratio)
                };
                *scattered = Ray {
                    orig: rec.p,
-                    dir: direction 
+                    dir: direction,
                };
-                return true;
-            },
+                true
+            }
        }
    }

@@ -159,7 +175,7 @@ impl Material {
        // Schlick's approximation for reflectance.
        let r0 = (1.0 - ref_idx) / (1.0 + ref_idx);
        let r0 = r0 * r0;
-        return r0 + (1.0 - r0) * (1.0 - cosine).powf(5.0);
+        r0 + (1.0 - r0) * (1.0 - cosine).powf(5.0)
    }
 }

@@ -174,7 +190,8 @@ pub struct Camera {
    lower_left_corner: Vec3,
    horizontal: Vec3,
    vertical: Vec3,
-    u: Vec3, v: Vec3, /*w: Vec3,*/
+    u: Vec3,
+    v: Vec3, /*w: Vec3,*/
    lens_radius: f32,
 }

@@ -186,7 +203,7 @@ impl Camera {
        vfov: f32,
        aspect_ratio: f32,
        aperture: f32,
-        focus_dist: f32
+        focus_dist: f32,
    ) -> Camera {
        let theta = degrees_to_radians(vfov);
        let h = (theta / 2.0).tan();
@@ -202,12 +219,13 @@ impl Camera {
        let verti = v * vp_height * focus_dist;
        let lower_left_corner = orig - horiz / 2.0 - verti / 2.0 - w * focus_dist;

-        Camera{
+        Camera {
            origin: orig,
            lower_left_corner,
            horizontal: horiz,
            vertical: verti,
-            u, v, /* w,*/
+            u,
+            v, /* w,*/
            lens_radius: aperture / 2.0,
        }
    }
@@ -216,18 +234,15 @@ impl Camera {
        let rd = Vec3::rand_in_unit_disk(srng) * self.lens_radius;
        let offset = self.u * rd.x + self.v * rd.y;

-        let dir = self.lower_left_corner
-                + self.horizontal * s
-                + self.vertical * t 
-                - self.origin - offset;
-        Ray{
+        let dir =
+            self.lower_left_corner + self.horizontal * s + self.vertical * t - self.origin - offset;
+        Ray {
            orig: self.origin + offset,
            dir,
        }
    }
 }

-
 pub struct Scene {
    pub camera: Camera,
    pub world: Hittable,
@@ -235,12 +250,20 @@ pub struct Scene {

 impl Scene {
    pub fn random_world(srng: &mut SmallRng) -> Hittable {
-        let mat_ground = Material::Lambertian { albedo: Vec3::new(0.5, 0.5, 0.5) };
-        let mut world = Hittable::HittableList { hittables : Vec::<Hittable>::new() };
-        
-        world.push( Hittable::Sphere { center: Vec3::new(0.0, -1000.0, 0.0), radius: 1000.0, material: mat_ground });
-        
-        let distrib_zero_one = Uniform::new(0.0, 1.0);
+        let mat_ground = Material::Lambertian {
+            albedo: Vec3::new(0.5, 0.5, 0.5),
+        };
+        let mut world = Hittable::HittableList {
+            hittables: Vec::<Hittable>::new(),
+        };
+
+        world.push(Hittable::Sphere {
+            center: Vec3::new(0.0, -1000.0, 0.0),
+            radius: 1000.0,
+            material: mat_ground,
+        });
+
+        let distrib_zero_one = Uniform::new(0.0, 1.0).unwrap();
        for a in -11..11 {
            for b in -11..11 {
                let choose_mat = srng.sample(distrib_zero_one);
@@ -250,69 +273,71 @@ impl Scene {
                    z: b as f32 + 0.9 * srng.sample(distrib_zero_one),
                };
                if (center - Vec3::new(4.0, 0.2, 0.0)).length() > 0.9 {
-
                    if choose_mat < 0.8 {
                        // diffuse
-                        let albedo = Vec3::rand(srng, distrib_zero_one) * Vec3::rand(srng, distrib_zero_one);
+                        let albedo =
+                            Vec3::rand(srng, distrib_zero_one) * Vec3::rand(srng, distrib_zero_one);
                        let sphere_material = Material::Lambertian { albedo };
-                        world.push(
-                            Hittable::Sphere {
-                                center,
-                                radius: 0.2,
-                                material: sphere_material,
-                            }
-                        );
+                        world.push(Hittable::Sphere {
+                            center,
+                            radius: 0.2,
+                            material: sphere_material,
+                        });
                    } else if choose_mat < 0.95 {
                        // metal
-                        let distr_albedo = Uniform::new(0.5, 1.0);
-                        let distr_fuzz = Uniform::new(0.0, 0.5);
+                        let distr_albedo = Uniform::new(0.5, 1.0).unwrap();
+                        let distr_fuzz = Uniform::new(0.0, 0.5).unwrap();

                        let albedo = Vec3::rand(srng, distr_albedo);
                        let fuzz = srng.sample(distr_fuzz);
                        let material = Material::Metal { albedo, fuzz };
-                        world.push(
-                            Hittable::Sphere {
-                                center,
-                                radius: 0.2,
-                                material: material,
-                            }
-                        );
+                        world.push(Hittable::Sphere {
+                            center,
+                            radius: 0.2,
+                            material,
+                        });
                    } else {
                        // glass
-                        let material = Material::Dielectric { index_refraction: 1.5 };
-                        world.push(
-                            Hittable::Sphere{
-                                center,
-                                radius: 0.2,
-                                material: material,
-                            }
-                        );
-
+                        let material = Material::Dielectric {
+                            index_refraction: 1.5,
+                        };
+                        world.push(Hittable::Sphere {
+                            center,
+                            radius: 0.2,
+                            material,
+                        });
                    };
                }
            }
        }

-        let material1 = Material::Dielectric { index_refraction: 1.5 };
-        world.push( Hittable::Sphere{
+        let material1 = Material::Dielectric {
+            index_refraction: 1.5,
+        };
+        world.push(Hittable::Sphere {
            center: Vec3::new(0.0, 1.0, 0.0),
            radius: 1.0,
-            material: material1
+            material: material1,
        });

-        let material2 = Material::Lambertian { albedo: Vec3::new(0.4, 0.2, 0.1) };
-        world.push( Hittable::Sphere {
+        let material2 = Material::Lambertian {
+            albedo: Vec3::new(0.4, 0.2, 0.1),
+        };
+        world.push(Hittable::Sphere {
            center: Vec3::new(-4.0, 1.0, 0.0),
            radius: 1.0,
-            material: material2
+            material: material2,
        });

-        let material3 = Material::Metal { albedo: Vec3::new(0.7, 0.6, 0.5), fuzz: 0.0 };
-        world.push( Hittable::Sphere {
+        let material3 = Material::Metal {
+            albedo: Vec3::new(0.7, 0.6, 0.5),
+            fuzz: 0.0,
+        };
+        world.push(Hittable::Sphere {
            center: Vec3::new(4.0, 1.0, 0.0),
            radius: 1.0,
-            material: material3
+            material: material3,
        });
        world
    }
-}
+}
Author	SHA1	Message	Date
Robert Garrett	78ed28a334	Split crate into lib and bin chunks I'm going to be doing some silly WASM and ES Module stuff here shortly, so I need a cdylib. This means I'll need the crate to actually have a library in it.	2025-11-11 17:09:24 -06:00
Robert Garrett	6614b32969	Delete the example images	2025-11-11 17:09:15 -06:00
Robert Garrett	49569528fa	Mark v1, release under AGPL-3.0 license I'm marking v1 here before I make any more changes. I would have liked to make v1 the last change I made when finishing the Ray Tracing in One Weekend book, but I did not. The project shall be AGPL v3-only. I'm indicating this both in a LICENSE file and in the Cargo.toml's project.license table because not all tools understand both pathways.	2025-11-11 17:01:47 -06:00
Robert Garrett	309931b7f6	Replace util ctor's with constants I don't need functions to create new vectors, I just want a constant that I can clone. The compiler probably does the same thing in both cases, but this is more semantically accurate to that goal.	2025-08-20 10:31:03 -05:00
Robert Garrett	83fa670d35	Remove these extra brackets I don't know why I put them there, and I'm not going to `git bisect` to figure it out. They're just going away.	2025-08-20 10:15:30 -05:00
Robert Garrett	46f6784256	Run fixes recommended by cargo-clippy	2025-08-19 18:26:41 -05:00
Robert Garrett	fcb9ad2dd2	Check-in a default Cargo .gitignore I guess I didn't use `cargo new` or `cargo init` at any point. Strange;	2025-08-19 18:23:08 -05:00
Robert Garrett	34a828fe67	autoformat the project	2025-08-19 18:21:51 -05:00
Robert Garrett	05add1efca	Fix imports and Uniform creation usage in rand Rand v0.9 made the `Uniform::new()` function fallible, but I'm going to keep assuming these always work and just `.unwrap()` the Result. It also renamed the distribution module, for some reason.	2025-03-01 12:57:57 -06:00
Robert Garrett	8548e4e322	Update dependency versions It's been a couple years and there are new versions of these libraries. Bump and relax constraints (I don't need exact patch levels, that's what a lockfile is for).	2025-03-01 12:56:36 -06:00
Robert Garrett	c8726a4d9a	Bump edition to 2024 in Cargo.toml	2025-03-01 12:32:33 -06:00