Fix a few warnings

Cargo.toml

@@ -3,7 +3,8 @@ name = "refraction"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lints.rust]
+mixed_script_confusables = "allow"
 
 [profile.dev]
 panic = 'abort'

src/bin/flat/main.rs

@@ -215,8 +215,8 @@ fn draw_track(gc: &mut Vec<Draw>, space: &Space, start: Vec2, dir: Vec2) {
 	};
 	draw(&loc);
 	for _ in 0..1000 {
-		let N = (STEP / DT).floor() as i32;
-		for _ in 0..N {
+		let n = (STEP / DT).floor() as i32;
+		for _ in 0..n {
 			loc = space.move_step(loc, v * DT);
 		}
 		draw(&loc);

src/fns.rs

@@ -120,7 +120,7 @@ impl QuadraticAccelerator {
 
 #[cfg(test)]
 mod test {
-	use approx::{abs_diff_eq, assert_abs_diff_eq, AbsDiffEq};
+	use approx::{abs_diff_eq, assert_abs_diff_eq};
 
 	use super::*;
 

src/mesh_loader.rs

@@ -5,7 +5,7 @@ use std::io;
 struct ObjVertex {
 	vertex: usize,
 	normal: usize,
-	tex_coord: usize,
+	// tex_coord: usize,
 }
 
 #[derive(Copy, Clone, Debug)]
@@ -42,7 +42,7 @@ impl ObjMesh {
 		assert_eq!(tokens.len(), 3);
 		ObjVertex {
 			vertex: tokens[0],
-			tex_coord: tokens[1],
+			// tex_coord: tokens[1],
 			normal: tokens[2],
 		}
 	}

src/riemann.rs

@@ -145,7 +145,7 @@ mod tests {
 	use super::*;
 	use approx::assert_abs_diff_eq;
 
-	use glam::{mat3, vec3, Mat3};
+	use glam::{vec3, Mat3};
 	use rand::{Rng, SeedableRng};
 
 	#[test]

src/tube/metric.rs

@@ -142,8 +142,8 @@ mod test {
 			for bx in [0.0, ε, 1.0, 7.0, 30.0 - ε] {
 				let a = vec3(ax, -(space.tube.external_halflength + off), 0.);
 				let b = vec3(bx, space.tube.external_halflength + off, 0.);
-				let Δ = vec3(bx - ax, 2.0 * (space.tube.internal_halflength + off), 0.);
-				let dir = Δ / (steps as f32);
+				let δ = vec3(bx - ax, 2.0 * (space.tube.internal_halflength + off), 0.);
+				let dir = δ / (steps as f32);
 				let traced = space.trace_iter(Ray { pos: a, dir }).nth(steps).unwrap();
 				assert_abs_diff_eq!(traced.pos.x, b.x, epsilon = 1.0e-2);
 				assert_abs_diff_eq!(traced.pos.y, b.y, epsilon = 1.0e1);
@@ -180,8 +180,8 @@ mod test {
 			) {
 				let a = vec3(ax, -(space.tube.external_halflength + off), 0.);
 				let b = vec3(bx, space.tube.external_halflength + off, 0.);
-				let Δ = vec3(bx - ax, 2.0 * (space.tube.internal_halflength + off), 0.);
-				let dir = Δ / (steps as f32);
+				let δ = vec3(bx - ax, 2.0 * (space.tube.internal_halflength + off), 0.);
+				let dir = δ / (steps as f32);
 				let traced = space.trace_iter(Ray { pos: a, dir }).nth(steps).unwrap();
 				assert_abs_diff_eq!(traced.pos.x, b.x, epsilon = 1.0e-2);
 				assert_abs_diff_eq!(traced.pos.y, b.y, epsilon = 1.0e0);
@@ -208,8 +208,8 @@ mod test {
 		for x in [space.tube.inner_radius - ε, space.tube.inner_radius + ε] {
 			let a = vec3(x, -(space.tube.external_halflength + off), 0.);
 			let b = vec3(x, space.tube.external_halflength + off, 0.);
-			let Δ = vec3(0.0, 2.0 * (space.tube.internal_halflength + off), 0.);
-			let dir = Δ / (steps as f32);
+			let δ = vec3(0.0, 2.0 * (space.tube.internal_halflength + off), 0.);
+			let dir = δ / (steps as f32);
 			let traced = space.trace_iter(Ray { pos: a, dir }).nth(steps).unwrap();
 			assert_abs_diff_eq!(traced.pos.x, b.x, epsilon = 1.0e-1);
 			assert_abs_diff_eq!(traced.pos.y, b.y, epsilon = 1.0e0);
@@ -235,8 +235,8 @@ mod test {
 		for x in [space.tube.outer_radius + ε, space.tube.outer_radius - ε] {
 			let a = vec3(x, -(space.tube.external_halflength + off), 0.);
 			let b = vec3(x, space.tube.external_halflength + off, 0.);
-			let Δ = vec3(0.0, 2.0 * (space.tube.external_halflength + off), 0.);
-			let dir = Δ / (steps as f32);
+			let δ = vec3(0.0, 2.0 * (space.tube.external_halflength + off), 0.);
+			let dir = δ / (steps as f32);
 			let traced = space.trace_iter(Ray { pos: a, dir }).nth(steps).unwrap();
 			assert_abs_diff_eq!(traced.pos.x, b.x, epsilon = 2.0e0);
 			assert_abs_diff_eq!(traced.pos.y, b.y, epsilon = 1.0e0);

src/tube/mod.rs

@@ -1,4 +1,4 @@
-use glam::{bool, f32, vec3, Mat3, Vec3};
+use glam::{bool, f32, Mat3, Vec3};
 
 use crate::ifaces::{DebugTraceable, RayPath, Traceable};
 use coords::{FlatCoordinateSystem, InnerCS, OuterCS};
@@ -91,13 +91,6 @@ impl Space {
 		}
 	}
 
-	fn trace_boundary(&self, ray: Ray) -> Ray {
-		assert_eq!(self.which_subspace(ray.pos), Boundary);
-		self.trace_iter(ray)
-			.find(|&ray| self.which_subspace(ray.pos) != Boundary)
-			.expect("Can't get outta the wall!")
-	}
-
 	fn list_objects(&self, tfm: impl Fn(Location) -> Location) -> Vec<Object> {
 		self.objs
 			.iter()
@@ -284,6 +277,9 @@ impl Rect {
 	}
 }
 
+#[cfg(test)]
+use glam::vec3;
+
 #[test]
 fn test_rect() {
 	assert_eq!(