more stuff

assignment-1b/.gitignore

@@ -5,3 +5,5 @@
 *.ppm
 *.zip
 *.pdf
+perf.data*
+flamegraph.svg

assignment-1b/Cargo.toml

@@ -4,6 +4,10 @@ authors = ["Michael Zhang <zhan4854@umn.edu>"]
 version = "0.1.0"
 edition = "2021"
 
+# For profiling with flamegraphs
+[profile.release]
+debug = true
+
 [[bin]]
 name = "raytracer1b"
 path = "src/main.rs"

assignment-1b/src/main.rs

@@ -6,6 +6,7 @@ use assignment_1b::image::Image;
 use assignment_1b::ray::Ray;
 use assignment_1b::scene::Scene;
 use clap::Parser;
+use rayon::prelude::{IntoParallelIterator, ParallelIterator};
 
 /// Simple raycaster.
 #[derive(Parser)]
@@ -69,12 +70,8 @@ fn main() -> Result<()> {
   // Generate a parallel iterator for pixels
   // The iterator preserves order and uses row-major order
   let pixels_iter = (0..scene.image_height)
-    // .into_par_iter()
-    .flat_map(|y| {
-      (0..scene.image_width)
-        // .into_par_iter()
-        .map(move |x| (x, y))
-    });
+    .into_par_iter()
+    .flat_map(|y| (0..scene.image_width).into_par_iter().map(move |x| (x, y)));
 
   // Loop through every single pixel of the output file
   let pixels = pixels_iter

assignment-1b/src/scene/input_file.rs

@@ -80,7 +80,7 @@ impl Scene {
               1 => LightKind::Point {
                 location: read_vec3(0)?,
               },
-              _ => bail!("Invalid w"),
+              _ => bail!("Invalid w; must be either 0 or 1"),
             };
             let light = Light {
               kind,

assignment-1b/src/utils.rs

@@ -33,9 +33,10 @@ pub fn compute_rotation_matrix(
   a: Vector3<f64>,
   b: Vector3<f64>,
 ) -> Result<Matrix3<f64>> {
-  // Special case: if a and b are in the same direction, just return the identity matrix
+  // Special case: if a and b are in the same direction, just return the
+  // identity matrix.
   if a.normalize() == b.normalize() {
-    return Ok(Matrix3::identity())
+    return Ok(Matrix3::identity());
   }
 
   let cos_t = a.dot(&b);

flake.nix

@@ -18,6 +18,7 @@
             cargo-flamegraph
             cargo-watch
             imagemagick
+            linuxPackages_latest.perf
             pandoc
             texlive.combined.scheme-full
             unzip