From b04a1b658fe96c03046fcd6ff2e63e55d006f711 Mon Sep 17 00:00:00 2001
From: devil-ira <justthecooldude@gmail.com>
Date: Tue, 30 Aug 2022 11:24:07 +0200
Subject: [PATCH] gudbye, fren

---
 examples/2d/mesh2d_manual.rs              |  4 ++--
 examples/3d/lighting.rs                   | 10 +++++-----
 examples/3d/load_gltf.rs                  |  6 +++---
 examples/3d/render_to_texture.rs          |  4 ++--
 examples/3d/shadow_biases.rs              |  8 ++++----
 examples/3d/shadow_caster_receiver.rs     |  6 +++---
 examples/3d/shapes.rs                     |  4 ++--
 examples/3d/skybox.rs                     |  6 +++---
 examples/3d/split_screen.rs               |  4 ++--
 examples/3d/spotlight.rs                  | 10 +++++-----
 examples/3d/texture.rs                    | 22 ++++++----------------
 examples/animation/animated_fox.rs        |  4 ++--
 examples/animation/animated_transform.rs  | 14 +++++++-------
 examples/animation/custom_skinned_mesh.rs |  4 ++--
 examples/animation/gltf_skinned_mesh.rs   |  4 ++--
 examples/ecs/hierarchy.rs                 |  6 +++---
 examples/games/alien_cake_addict.rs       | 10 +++++-----
 examples/stress_tests/many_cubes.rs       |  4 ++--
 examples/stress_tests/many_foxes.rs       |  8 ++++----
 examples/stress_tests/many_lights.rs      |  4 ++--
 examples/tools/scene_viewer.rs            |  8 ++++----
 examples/transforms/scale.rs              |  4 ++--
 examples/transforms/transform.rs          |  4 ++--
 23 files changed, 74 insertions(+), 84 deletions(-)

diff --git a/examples/2d/mesh2d_manual.rs b/examples/2d/mesh2d_manual.rs
index 5988245435979..25dd9667531f7 100644
--- a/examples/2d/mesh2d_manual.rs
+++ b/examples/2d/mesh2d_manual.rs
@@ -3,7 +3,7 @@
 //! It doesn't use the [`Material2d`] abstraction, but changes the vertex buffer to include vertex color.
 //! Check out the "mesh2d" example for simpler / higher level 2d meshes.
 
-use std::f32::consts::TAU;
+use std::f32::consts::{ PI};
 
 use bevy::{
     core_pipeline::core_2d::Transparent2d,
@@ -65,7 +65,7 @@ fn star(
     let mut v_pos = vec![[0.0, 0.0, 0.0]];
     for i in 0..10 {
         // The angle between each vertex is 1/10 of a full rotation.
-        let a = i as f32 * TAU / 10.0;
+        let a = i as f32 * PI / 5.0;
         // The radius of inner vertices (even indices) is 100. For outer vertices (odd indices) it's 200.
         let r = (1 - i % 2) as f32 * 100.0 + 100.0;
         // Add the vertex position.
diff --git a/examples/3d/lighting.rs b/examples/3d/lighting.rs
index 7479c2af46e12..2a6ef6839b578 100644
--- a/examples/3d/lighting.rs
+++ b/examples/3d/lighting.rs
@@ -1,7 +1,7 @@
 //! Illustrates different lights of various types and colors, some static, some moving over
 //! a simple scene.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -36,7 +36,7 @@ fn setup(
 
     // left wall
     let mut transform = Transform::from_xyz(2.5, 2.5, 0.0);
-    transform.rotate_z(TAU / 4.);
+    transform.rotate_z(PI / 2.);
     commands.spawn_bundle(PbrBundle {
         mesh: meshes.add(Mesh::from(shape::Box::new(5.0, 0.15, 5.0))),
         transform,
@@ -49,7 +49,7 @@ fn setup(
     });
     // back (right) wall
     let mut transform = Transform::from_xyz(0.0, 2.5, -2.5);
-    transform.rotate_x(TAU / 4.);
+    transform.rotate_x(PI / 2.);
     commands.spawn_bundle(PbrBundle {
         mesh: meshes.add(Mesh::from(shape::Box::new(5.0, 0.15, 5.0))),
         transform,
@@ -140,7 +140,7 @@ fn setup(
         })
         .with_children(|builder| {
             builder.spawn_bundle(PbrBundle {
-                transform: Transform::from_rotation(Quat::from_rotation_x(TAU / 4.0)),
+                transform: Transform::from_rotation(Quat::from_rotation_x(PI / 2.0)),
                 mesh: meshes.add(Mesh::from(shape::Capsule {
                     depth: 0.125,
                     radius: 0.1,
@@ -202,7 +202,7 @@ fn setup(
         },
         transform: Transform {
             translation: Vec3::new(0.0, 2.0, 0.0),
-            rotation: Quat::from_rotation_x(-TAU / 8.),
+            rotation: Quat::from_rotation_x(-PI / 4.),
             ..default()
         },
         ..default()
diff --git a/examples/3d/load_gltf.rs b/examples/3d/load_gltf.rs
index a40f3ba2d9f5f..bc7ee046b327e 100644
--- a/examples/3d/load_gltf.rs
+++ b/examples/3d/load_gltf.rs
@@ -1,6 +1,6 @@
 //! Loads and renders a glTF file as a scene.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -52,8 +52,8 @@ fn animate_light_direction(
         transform.rotation = Quat::from_euler(
             EulerRot::ZYX,
             0.0,
-            time.seconds_since_startup() as f32 * std::f32::consts::TAU / 10.0,
-            -TAU / 8.,
+            time.seconds_since_startup() as f32 * PI / 5.0,
+            -PI / 4.,
         );
     }
 }
diff --git a/examples/3d/render_to_texture.rs b/examples/3d/render_to_texture.rs
index e78c859361db8..801f44f3caead 100644
--- a/examples/3d/render_to_texture.rs
+++ b/examples/3d/render_to_texture.rs
@@ -1,6 +1,6 @@
 //! Shows how to render to a texture. Useful for mirrors, UI, or exporting images.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     core_pipeline::clear_color::ClearColorConfig,
@@ -128,7 +128,7 @@ fn setup(
             mesh: cube_handle,
             material: material_handle,
             transform: Transform::from_xyz(0.0, 0.0, 1.5)
-                .with_rotation(Quat::from_rotation_x(-TAU / 10.0)),
+                .with_rotation(Quat::from_rotation_x(-PI / 5.0)),
             ..default()
         })
         .insert(MainPassCube);
diff --git a/examples/3d/shadow_biases.rs b/examples/3d/shadow_biases.rs
index a97f7d5087eb2..51f4d483d355b 100644
--- a/examples/3d/shadow_biases.rs
+++ b/examples/3d/shadow_biases.rs
@@ -1,6 +1,6 @@
 //! Demonstrates how shadow biases affect shadows in a 3d scene.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{input::mouse::MouseMotion, prelude::*};
 
@@ -83,8 +83,8 @@ fn setup(
         transform: Transform::from_rotation(Quat::from_euler(
             EulerRot::ZYX,
             0.0,
-            TAU / 4.,
-            -TAU / 8.,
+            PI / 2.,
+            -PI / 4.,
         )),
         ..default()
     });
@@ -314,7 +314,7 @@ fn camera_controller(
         if mouse_delta != Vec2::ZERO {
             // Apply look update
             options.pitch = (options.pitch - mouse_delta.y * 0.5 * options.sensitivity * dt)
-                .clamp(-TAU / 4., TAU / 4.);
+                .clamp(-PI / 2., PI / 2.);
             options.yaw -= mouse_delta.x * options.sensitivity * dt;
             transform.rotation = Quat::from_euler(EulerRot::ZYX, 0.0, options.yaw, options.pitch);
         }
diff --git a/examples/3d/shadow_caster_receiver.rs b/examples/3d/shadow_caster_receiver.rs
index d7b67417bb7b6..eeed6f0939bc6 100644
--- a/examples/3d/shadow_caster_receiver.rs
+++ b/examples/3d/shadow_caster_receiver.rs
@@ -1,6 +1,6 @@
 //! Demonstrates how to prevent meshes from casting/receiving shadows in a 3d scene.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     pbr::{NotShadowCaster, NotShadowReceiver},
@@ -109,8 +109,8 @@ fn setup(
         transform: Transform::from_rotation(Quat::from_euler(
             EulerRot::ZYX,
             0.0,
-            TAU / 4.,
-            -TAU / 8.,
+            PI / 2.,
+            -PI / 4.,
         )),
         ..default()
     });
diff --git a/examples/3d/shapes.rs b/examples/3d/shapes.rs
index 9b099ce231083..3e75decfdd47b 100644
--- a/examples/3d/shapes.rs
+++ b/examples/3d/shapes.rs
@@ -1,7 +1,7 @@
 //! This example demonstrates the built-in 3d shapes in Bevy.
 //! The scene includes a patterned texture and a rotation for visualizing the normals and UVs.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     prelude::*,
@@ -55,7 +55,7 @@ fn setup(
                     2.0,
                     0.0,
                 )
-                .with_rotation(Quat::from_rotation_x(-TAU / 8.)),
+                .with_rotation(Quat::from_rotation_x(-PI / 4.)),
                 ..default()
             })
             .insert(Shape);
diff --git a/examples/3d/skybox.rs b/examples/3d/skybox.rs
index c0ba220e958ea..c1602ba5d57e8 100644
--- a/examples/3d/skybox.rs
+++ b/examples/3d/skybox.rs
@@ -1,6 +1,6 @@
 //! Load a cubemap texture onto a cube like a skybox and cycle through different compressed texture formats
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     asset::LoadState,
@@ -69,7 +69,7 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
             ..default()
         },
         transform: Transform::from_xyz(0.0, 2.0, 0.0)
-            .with_rotation(Quat::from_rotation_x(-TAU / 8.)),
+            .with_rotation(Quat::from_rotation_x(-PI / 4.)),
         ..default()
     });
 
@@ -410,7 +410,7 @@ pub fn camera_controller(
         if mouse_delta != Vec2::ZERO {
             // Apply look update
             options.pitch = (options.pitch - mouse_delta.y * 0.5 * options.sensitivity * dt)
-                .clamp(-TAU / 4., TAU / 4.);
+                .clamp(-PI / 2., PI / 2.);
             options.yaw -= mouse_delta.x * options.sensitivity * dt;
             transform.rotation = Quat::from_euler(EulerRot::ZYX, 0.0, options.yaw, options.pitch);
         }
diff --git a/examples/3d/split_screen.rs b/examples/3d/split_screen.rs
index 7ee5f1bad2972..7724280840e49 100644
--- a/examples/3d/split_screen.rs
+++ b/examples/3d/split_screen.rs
@@ -1,6 +1,6 @@
 //! Renders two cameras to the same window to accomplish "split screen".
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     core_pipeline::clear_color::ClearColorConfig,
@@ -38,7 +38,7 @@ fn setup(
 
     // Light
     commands.spawn_bundle(DirectionalLightBundle {
-        transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -TAU / 8.)),
+        transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -PI / 4.)),
         directional_light: DirectionalLight {
             shadows_enabled: true,
             ..default()
diff --git a/examples/3d/spotlight.rs b/examples/3d/spotlight.rs
index 011948ff2075c..c7ea21b568f9b 100644
--- a/examples/3d/spotlight.rs
+++ b/examples/3d/spotlight.rs
@@ -1,4 +1,4 @@
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
@@ -76,8 +76,8 @@ fn setup(
                         intensity: 200.0, // lumens
                         color: Color::WHITE,
                         shadows_enabled: true,
-                        inner_angle: TAU / 8.0 * 0.85,
-                        outer_angle: TAU / 8.0,
+                        inner_angle: PI / 4.0 * 0.85,
+                        outer_angle: PI / 4.0,
                         ..default()
                     },
                     ..default()
@@ -125,11 +125,11 @@ fn light_sway(time: Res<Time>, mut query: Query<(&mut Transform, &mut SpotLight)
     for (mut transform, mut angles) in query.iter_mut() {
         transform.rotation = Quat::from_euler(
             EulerRot::XYZ,
-            -TAU / 4. + (time.seconds_since_startup() * 0.67 * 3.0).sin() as f32 * 0.5,
+            -PI / 2. + (time.seconds_since_startup() * 0.67 * 3.0).sin() as f32 * 0.5,
             (time.seconds_since_startup() * 3.0).sin() as f32 * 0.5,
             0.0,
         );
-        let angle = ((time.seconds_since_startup() * 1.2).sin() as f32 + 1.0) * (TAU / 8. - 0.1);
+        let angle = ((time.seconds_since_startup() * 1.2).sin() as f32 + 1.0) * (PI / 4. - 0.1);
         angles.inner_angle = angle * 0.8;
         angles.outer_angle = angle;
     }
diff --git a/examples/3d/texture.rs b/examples/3d/texture.rs
index 06ddce95a07c9..21f90d860b15a 100644
--- a/examples/3d/texture.rs
+++ b/examples/3d/texture.rs
@@ -1,6 +1,6 @@
 //! This example shows various ways to configure texture materials in 3D.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -59,33 +59,23 @@ fn setup(
     commands.spawn_bundle(PbrBundle {
         mesh: quad_handle.clone(),
         material: material_handle,
-        transform: Transform {
-            translation: Vec3::new(0.0, 0.0, 1.5),
-            rotation: Quat::from_rotation_x(-TAU / 10.0),
-            ..default()
-        },
+        transform: Transform::from_xyz(0.0, 0.0, 1.5)
+            .with_rotation(Quat::from_rotation_x(-PI / 5.0)),
         ..default()
     });
     // textured quad - modulated
     commands.spawn_bundle(PbrBundle {
         mesh: quad_handle.clone(),
         material: red_material_handle,
-        transform: Transform {
-            translation: Vec3::new(0.0, 0.0, 0.0),
-            rotation: Quat::from_rotation_x(-TAU / 10.0),
-            ..default()
-        },
+        transform: Transform::from_rotation(Quat::from_rotation_x(-PI / 5.0)),
         ..default()
     });
     // textured quad - modulated
     commands.spawn_bundle(PbrBundle {
         mesh: quad_handle,
         material: blue_material_handle,
-        transform: Transform {
-            translation: Vec3::new(0.0, 0.0, -1.5),
-            rotation: Quat::from_rotation_x(-TAU / 10.0),
-            ..default()
-        },
+        transform: Transform::from_xyz(0.0, 0.0, -1.5)
+            .with_rotation(Quat::from_rotation_x(-PI / 5.0)),
         ..default()
     });
     // camera
diff --git a/examples/animation/animated_fox.rs b/examples/animation/animated_fox.rs
index 4912fbfeacf08..34458d5c106f3 100644
--- a/examples/animation/animated_fox.rs
+++ b/examples/animation/animated_fox.rs
@@ -1,6 +1,6 @@
 //! Plays animations from a skinned glTF.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -49,7 +49,7 @@ fn setup(
 
     // Light
     commands.spawn_bundle(DirectionalLightBundle {
-        transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -TAU / 8.)),
+        transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -PI / 4.)),
         directional_light: DirectionalLight {
             shadows_enabled: true,
             ..default()
diff --git a/examples/animation/animated_transform.rs b/examples/animation/animated_transform.rs
index 4a203dbb6b9b3..cd8115abf26e9 100644
--- a/examples/animation/animated_transform.rs
+++ b/examples/animation/animated_transform.rs
@@ -1,6 +1,6 @@
 //! Create and play an animation defined by code that operates on the `Transform` component.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -63,9 +63,9 @@ fn setup(
             keyframe_timestamps: vec![0.0, 1.0, 2.0, 3.0, 4.0],
             keyframes: Keyframes::Rotation(vec![
                 Quat::IDENTITY,
-                Quat::from_axis_angle(Vec3::Y, TAU / 4.),
-                Quat::from_axis_angle(Vec3::Y, TAU / 4. * 2.),
-                Quat::from_axis_angle(Vec3::Y, TAU / 4. * 3.),
+                Quat::from_axis_angle(Vec3::Y, PI / 2.),
+                Quat::from_axis_angle(Vec3::Y, PI / 2. * 2.),
+                Quat::from_axis_angle(Vec3::Y, PI / 2. * 3.),
                 Quat::IDENTITY,
             ]),
         },
@@ -101,9 +101,9 @@ fn setup(
             keyframe_timestamps: vec![0.0, 1.0, 2.0, 3.0, 4.0],
             keyframes: Keyframes::Rotation(vec![
                 Quat::IDENTITY,
-                Quat::from_axis_angle(Vec3::Y, TAU / 4.),
-                Quat::from_axis_angle(Vec3::Y, TAU / 4. * 2.),
-                Quat::from_axis_angle(Vec3::Y, TAU / 4. * 3.),
+                Quat::from_axis_angle(Vec3::Y, PI / 2.),
+                Quat::from_axis_angle(Vec3::Y, PI / 2. * 2.),
+                Quat::from_axis_angle(Vec3::Y, PI / 2. * 3.),
                 Quat::IDENTITY,
             ]),
         },
diff --git a/examples/animation/custom_skinned_mesh.rs b/examples/animation/custom_skinned_mesh.rs
index 6896473d47d60..e6e876f5d1195 100644
--- a/examples/animation/custom_skinned_mesh.rs
+++ b/examples/animation/custom_skinned_mesh.rs
@@ -1,7 +1,7 @@
 //! Skinned mesh example with mesh and joints data defined in code.
 //! Example taken from <https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/gltfTutorial_019_SimpleSkin.md>
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     pbr::AmbientLight,
@@ -165,6 +165,6 @@ fn setup(
 fn joint_animation(time: Res<Time>, mut query: Query<&mut Transform, With<AnimatedJoint>>) {
     for mut transform in &mut query {
         transform.rotation =
-            Quat::from_rotation_z(TAU / 4. * time.time_since_startup().as_secs_f32().sin());
+            Quat::from_rotation_z(PI / 2. * time.time_since_startup().as_secs_f32().sin());
     }
 }
diff --git a/examples/animation/gltf_skinned_mesh.rs b/examples/animation/gltf_skinned_mesh.rs
index 49e7357d362c4..c67a8899fb54d 100644
--- a/examples/animation/gltf_skinned_mesh.rs
+++ b/examples/animation/gltf_skinned_mesh.rs
@@ -1,7 +1,7 @@
 //! Skinned mesh example with mesh and joints data loaded from a glTF file.
 //! Example taken from <https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/gltfTutorial_019_SimpleSkin.md>
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{pbr::AmbientLight, prelude::*, render::mesh::skinning::SkinnedMesh};
 
@@ -67,6 +67,6 @@ fn joint_animation(
         let mut second_joint_transform = transform_query.get_mut(second_joint_entity).unwrap();
 
         second_joint_transform.rotation =
-            Quat::from_rotation_z(TAU / 4. * time.time_since_startup().as_secs_f32().sin());
+            Quat::from_rotation_z(PI / 2. * time.time_since_startup().as_secs_f32().sin());
     }
 }
diff --git a/examples/ecs/hierarchy.rs b/examples/ecs/hierarchy.rs
index 6d8d461d3c70d..5b34329f890cf 100644
--- a/examples/ecs/hierarchy.rs
+++ b/examples/ecs/hierarchy.rs
@@ -1,6 +1,6 @@
 //! Creates a hierarchy of parents and children entities.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -66,14 +66,14 @@ fn rotate(
 ) {
     for (parent, children) in &mut parents_query {
         if let Ok(mut transform) = transform_query.get_mut(parent) {
-            transform.rotate_z(-TAU / 4. * time.delta_seconds());
+            transform.rotate_z(-PI / 2. * time.delta_seconds());
         }
 
         // To iterate through the entities children, just treat the Children component as a Vec
         // Alternatively, you could query entities that have a Parent component
         for child in children {
             if let Ok(mut transform) = transform_query.get_mut(*child) {
-                transform.rotate_z(TAU / 2. * time.delta_seconds());
+                transform.rotate_z(PI * time.delta_seconds());
             }
         }
 
diff --git a/examples/games/alien_cake_addict.rs b/examples/games/alien_cake_addict.rs
index ffe3939de4446..c543c7c91d9a7 100644
--- a/examples/games/alien_cake_addict.rs
+++ b/examples/games/alien_cake_addict.rs
@@ -1,6 +1,6 @@
 //! Eat the cakes. Eat them all. An example 3D game.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{ecs::schedule::SystemSet, prelude::*, time::FixedTimestep};
 use rand::Rng;
@@ -139,7 +139,7 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>, mut game: ResMu
                         game.board[game.player.j][game.player.i].height,
                         game.player.j as f32,
                     ),
-                    rotation: Quat::from_rotation_y(-std::f32::consts::FRAC_PI_2),
+                    rotation: Quat::from_rotation_y(-PI / 2.),
                     ..default()
                 },
                 scene: asset_server.load("models/AlienCake/alien.glb#Scene0"),
@@ -196,21 +196,21 @@ fn move_player(
             if game.player.i < BOARD_SIZE_I - 1 {
                 game.player.i += 1;
             }
-            rotation = -TAU / 4.;
+            rotation = -PI / 2.;
             moved = true;
         }
         if keyboard_input.pressed(KeyCode::Down) {
             if game.player.i > 0 {
                 game.player.i -= 1;
             }
-            rotation = TAU / 4.;
+            rotation = PI / 2.;
             moved = true;
         }
         if keyboard_input.pressed(KeyCode::Right) {
             if game.player.j < BOARD_SIZE_J - 1 {
                 game.player.j += 1;
             }
-            rotation = TAU / 2.;
+            rotation = PI;
             moved = true;
         }
         if keyboard_input.pressed(KeyCode::Left) {
diff --git a/examples/stress_tests/many_cubes.rs b/examples/stress_tests/many_cubes.rs
index e3b7992654fad..b6d063bcf3c7e 100644
--- a/examples/stress_tests/many_cubes.rs
+++ b/examples/stress_tests/many_cubes.rs
@@ -10,7 +10,7 @@
 //! To start the demo using the spherical layout run
 //! `cargo run --example many_cubes --release sphere`
 
-use std::f64::consts::TAU;
+use std::f64::consts::PI;
 
 use bevy::{
     diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
@@ -144,7 +144,7 @@ const EPSILON: f64 = 0.36;
 
 fn fibonacci_spiral_on_sphere(golden_ratio: f64, i: usize, n: usize) -> DVec2 {
     DVec2::new(
-        TAU * (i as f64 / golden_ratio),
+        PI * 2. * (i as f64 / golden_ratio),
         (1.0 - 2.0 * (i as f64 + EPSILON) / (n as f64 - 1.0 + 2.0 * EPSILON)).acos(),
     )
 }
diff --git a/examples/stress_tests/many_foxes.rs b/examples/stress_tests/many_foxes.rs
index d3ff5b0823ab6..1ef8049fdc29e 100644
--- a/examples/stress_tests/many_foxes.rs
+++ b/examples/stress_tests/many_foxes.rs
@@ -1,7 +1,7 @@
 //! Loads animations from a skinned glTF, spawns many of them, and plays the
 //! animation to stress test skinned meshes.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::{
     diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
@@ -95,7 +95,7 @@ fn setup(
 
     let ring_directions = [
         (
-            Quat::from_rotation_y(TAU / 2.),
+            Quat::from_rotation_y(PI),
             RotationDirection::CounterClockwise,
         ),
         (Quat::IDENTITY, RotationDirection::Clockwise),
@@ -120,7 +120,7 @@ fn setup(
             ))
             .id();
 
-        let circumference = std::f32::consts::TAU * radius;
+        let circumference = PI * 2. * radius;
         let foxes_in_ring = ((circumference / FOX_SPACING) as usize).min(foxes_remaining);
         let fox_spacing_angle = circumference / (foxes_in_ring as f32 * radius);
 
@@ -167,7 +167,7 @@ fn setup(
 
     // Light
     commands.spawn_bundle(DirectionalLightBundle {
-        transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -TAU / 8.)),
+        transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -PI / 4.)),
         directional_light: DirectionalLight {
             shadows_enabled: true,
             ..default()
diff --git a/examples/stress_tests/many_lights.rs b/examples/stress_tests/many_lights.rs
index 3c5289044ec98..b048275e0f9fa 100644
--- a/examples/stress_tests/many_lights.rs
+++ b/examples/stress_tests/many_lights.rs
@@ -1,7 +1,7 @@
 //! Simple benchmark to test rendering many point lights.
 //! Run with `WGPU_SETTINGS_PRIO=webgl2` to restrict to uniform buffers and max 256 lights.
 
-use std::f64::consts::TAU;
+use std::f64::consts::PI;
 
 use bevy::{
     diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
@@ -115,7 +115,7 @@ fn setup(
 const EPSILON: f64 = 0.36;
 fn fibonacci_spiral_on_sphere(golden_ratio: f64, i: usize, n: usize) -> DVec2 {
     DVec2::new(
-        TAU * (i as f64 / golden_ratio),
+        PI * 2. * (i as f64 / golden_ratio),
         (1.0 - 2.0 * (i as f64 + EPSILON) / (n as f64 - 1.0 + 2.0 * EPSILON)).acos(),
     )
 }
diff --git a/examples/tools/scene_viewer.rs b/examples/tools/scene_viewer.rs
index 734f43c6fec82..e27f38223261c 100644
--- a/examples/tools/scene_viewer.rs
+++ b/examples/tools/scene_viewer.rs
@@ -14,7 +14,7 @@ use bevy::{
     scene::InstanceId,
 };
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 #[derive(Debug, Hash, PartialEq, Eq, Clone, SystemLabel)]
 struct CameraControllerCheckSystem;
@@ -330,8 +330,8 @@ fn update_lights(
             transform.rotation = Quat::from_euler(
                 EulerRot::ZYX,
                 0.0,
-                time.seconds_since_startup() as f32 * TAU / 30.0,
-                -TAU / 8.,
+                time.seconds_since_startup() as f32 * PI / 15.0,
+                -PI / 4.,
             );
         }
     }
@@ -527,7 +527,7 @@ fn camera_controller(
         if mouse_delta != Vec2::ZERO {
             // Apply look update
             options.pitch = (options.pitch - mouse_delta.y * 0.5 * options.sensitivity * dt)
-                .clamp(-TAU / 4., TAU / 4.);
+                .clamp(-PI / 2., PI / 2.);
             options.yaw -= mouse_delta.x * options.sensitivity * dt;
             transform.rotation = Quat::from_euler(EulerRot::ZYX, 0.0, options.yaw, options.pitch);
         }
diff --git a/examples/transforms/scale.rs b/examples/transforms/scale.rs
index d1adba01c0e0b..c10fac5163914 100644
--- a/examples/transforms/scale.rs
+++ b/examples/transforms/scale.rs
@@ -1,6 +1,6 @@
 //! Illustrates how to scale an object in each direction.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::math::Vec3Swizzles;
 use bevy::prelude::*;
@@ -46,7 +46,7 @@ fn setup(
         .spawn_bundle(PbrBundle {
             mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
             material: materials.add(Color::WHITE.into()),
-            transform: Transform::from_rotation(Quat::from_rotation_y(TAU / 8.0)),
+            transform: Transform::from_rotation(Quat::from_rotation_y(PI / 4.0)),
             ..default()
         })
         .insert(Scaling::new());
diff --git a/examples/transforms/transform.rs b/examples/transforms/transform.rs
index c0245d1a61612..26c5a640c6240 100644
--- a/examples/transforms/transform.rs
+++ b/examples/transforms/transform.rs
@@ -1,6 +1,6 @@
 //! Shows multiple transformations of objects.
 
-use std::f32::consts::TAU;
+use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
@@ -60,7 +60,7 @@ fn setup(
     // Define a start transform for an orbiting cube, that's away from our central object (sphere)
     // and rotate it so it will be able to move around the sphere and not towards it.
     let cube_spawn =
-        Transform::from_translation(Vec3::Z * -10.0).with_rotation(Quat::from_rotation_y(TAU / 4.));
+        Transform::from_translation(Vec3::Z * -10.0).with_rotation(Quat::from_rotation_y(PI / 2.));
     commands
         .spawn_bundle(PbrBundle {
             mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),