Move float_ord from bevy_core to bevy_utils (#4189)

# Objective

Reduce the catch-all grab-bag of functionality in bevy_core by moving FloatOrd to bevy_utils.

A step in addressing #2931 and splitting bevy_core into more specific locations.

## Solution

Move FloatOrd into bevy_utils. Fix the compile errors.

As a result, bevy_core_pipeline, bevy_pbr, bevy_sprite, bevy_text, and bevy_ui no longer depend on bevy_core (they were only using it for `FloatOrd` previously).

crates/bevy_core/src/lib.rs

@@ -1,13 +1,11 @@
 #![warn(missing_docs)]
 //! This crate provides core functionality for Bevy Engine.
 
-mod float_ord;
 mod name;
 mod task_pool_options;
 mod time;
 
 pub use bytemuck::{bytes_of, cast_slice, Pod, Zeroable};
-pub use float_ord::*;
 pub use name::*;
 pub use task_pool_options::*;
 pub use time::*;

crates/bevy_core_pipeline/Cargo.toml

@@ -19,7 +19,6 @@ trace = []
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.8.0-dev" }
 bevy_asset = { path = "../bevy_asset", version = "0.8.0-dev" }
-bevy_core = { path = "../bevy_core", version = "0.8.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.8.0-dev" }
 bevy_render = { path = "../bevy_render", version = "0.8.0-dev" }
 bevy_utils = { path = "../bevy_utils", version = "0.8.0-dev" }

crates/bevy_core_pipeline/src/lib.rs

@@ -20,7 +20,6 @@ pub use main_pass_driver::*;
 use std::ops::Range;
 
 use bevy_app::{App, Plugin};
-use bevy_core::FloatOrd;
 use bevy_ecs::prelude::*;
 use bevy_render::{
     camera::{ActiveCamera, Camera2d, Camera3d, ExtractedCamera, RenderTarget},
@@ -36,6 +35,7 @@ use bevy_render::{
     view::{ExtractedView, Msaa, ViewDepthTexture},
     RenderApp, RenderStage, RenderWorld,
 };
+use bevy_utils::FloatOrd;
 
 /// When used as a resource, sets the color that is used to clear the screen between frames.
 ///

crates/bevy_pbr/Cargo.toml

@@ -15,7 +15,6 @@ webgl = []
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.8.0-dev" }
 bevy_asset = { path = "../bevy_asset", version = "0.8.0-dev" }
-bevy_core = { path = "../bevy_core", version = "0.8.0-dev" }
 bevy_core_pipeline = { path = "../bevy_core_pipeline", version = "0.8.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.8.0-dev" }
 bevy_math = { path = "../bevy_math", version = "0.8.0-dev" }

crates/bevy_pbr/src/render/light.rs

@@ -4,7 +4,6 @@ use crate::{
     PointLight, PointLightShadowMap, SetMeshBindGroup, VisiblePointLights, SHADOW_SHADER_HANDLE,
 };
 use bevy_asset::Handle;
-use bevy_core::FloatOrd;
 use bevy_core_pipeline::Transparent3d;
 use bevy_ecs::{
     prelude::*,
@@ -30,6 +29,7 @@ use bevy_render::{
     },
 };
 use bevy_transform::components::GlobalTransform;
+use bevy_utils::FloatOrd;
 use bevy_utils::{
     tracing::{error, warn},
     HashMap,

crates/bevy_sprite/Cargo.toml

@@ -12,7 +12,6 @@ keywords = ["bevy"]
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.8.0-dev" }
 bevy_asset = { path = "../bevy_asset", version = "0.8.0-dev" }
-bevy_core = { path = "../bevy_core", version = "0.8.0-dev" }
 bevy_core_pipeline = { path = "../bevy_core_pipeline", version = "0.8.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.8.0-dev" }
 bevy_log = { path = "../bevy_log", version = "0.8.0-dev" }

crates/bevy_sprite/src/mesh2d/material.rs

@@ -1,6 +1,5 @@
 use bevy_app::{App, Plugin};
 use bevy_asset::{AddAsset, Asset, AssetServer, Handle};
-use bevy_core::FloatOrd;
 use bevy_core_pipeline::Transparent2d;
 use bevy_ecs::{
     entity::Entity,
@@ -29,6 +28,7 @@ use bevy_render::{
     RenderApp, RenderStage,
 };
 use bevy_transform::components::{GlobalTransform, Transform};
+use bevy_utils::FloatOrd;
 use std::hash::Hash;
 use std::marker::PhantomData;
 

crates/bevy_sprite/src/render/mod.rs

@@ -5,7 +5,6 @@ use crate::{
     Rect, Sprite, SPRITE_SHADER_HANDLE,
 };
 use bevy_asset::{AssetEvent, Assets, Handle, HandleId};
-use bevy_core::FloatOrd;
 use bevy_core_pipeline::Transparent2d;
 use bevy_ecs::{
     prelude::*,
@@ -27,6 +26,7 @@ use bevy_render::{
     RenderWorld,
 };
 use bevy_transform::components::GlobalTransform;
+use bevy_utils::FloatOrd;
 use bevy_utils::HashMap;
 use bytemuck::{Pod, Zeroable};
 use copyless::VecHelper;

crates/bevy_text/Cargo.toml

@@ -15,7 +15,6 @@ subpixel_glyph_atlas = []
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.8.0-dev" }
 bevy_asset = { path = "../bevy_asset", version = "0.8.0-dev" }
-bevy_core = { path = "../bevy_core", version = "0.8.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.8.0-dev" }
 bevy_math = { path = "../bevy_math", version = "0.8.0-dev" }
 bevy_reflect = { path = "../bevy_reflect", version = "0.8.0-dev", features = ["bevy"] }

crates/bevy_text/src/font_atlas_set.rs

@@ -1,11 +1,11 @@
 use crate::{error::TextError, Font, FontAtlas};
 use ab_glyph::{GlyphId, OutlinedGlyph, Point};
 use bevy_asset::{Assets, Handle};
-use bevy_core::FloatOrd;
 use bevy_math::Vec2;
 use bevy_reflect::TypeUuid;
 use bevy_render::texture::Image;
 use bevy_sprite::TextureAtlas;
+use bevy_utils::FloatOrd;
 use bevy_utils::HashMap;
 
 type FontSizeKey = FloatOrd;

crates/bevy_ui/Cargo.toml

@@ -12,7 +12,6 @@ keywords = ["bevy"]
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.8.0-dev" }
 bevy_asset = { path = "../bevy_asset", version = "0.8.0-dev" }
-bevy_core = { path = "../bevy_core", version = "0.8.0-dev" }
 bevy_core_pipeline = { path = "../bevy_core_pipeline", version = "0.8.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.8.0-dev" }
 bevy_hierarchy = { path = "../bevy_hierarchy", version = "0.8.0-dev" }

crates/bevy_ui/src/focus.rs

@@ -1,5 +1,4 @@
 use crate::{CalculatedClip, Node};
-use bevy_core::FloatOrd;
 use bevy_ecs::{
     entity::Entity,
     prelude::Component,
@@ -10,6 +9,7 @@ use bevy_input::{mouse::MouseButton, touch::Touches, Input};
 use bevy_math::Vec2;
 use bevy_reflect::{Reflect, ReflectDeserialize};
 use bevy_transform::components::GlobalTransform;
+use bevy_utils::FloatOrd;
 use bevy_window::Windows;
 use serde::{Deserialize, Serialize};
 use smallvec::SmallVec;

crates/bevy_ui/src/render/mod.rs

@@ -9,7 +9,6 @@ pub use render_pass::*;
 use crate::{CalculatedClip, Node, UiColor, UiImage};
 use bevy_app::prelude::*;
 use bevy_asset::{load_internal_asset, AssetEvent, Assets, Handle, HandleUntyped};
-use bevy_core::FloatOrd;
 use bevy_ecs::prelude::*;
 use bevy_math::{const_vec3, Mat4, Vec2, Vec3, Vec4Swizzles};
 use bevy_reflect::TypeUuid;
@@ -27,6 +26,7 @@ use bevy_render::{
 use bevy_sprite::{Rect, SpriteAssetEvents, TextureAtlas};
 use bevy_text::{DefaultTextPipeline, Text};
 use bevy_transform::components::GlobalTransform;
+use bevy_utils::FloatOrd;
 use bevy_utils::HashMap;
 use bevy_window::{WindowId, Windows};
 use bytemuck::{Pod, Zeroable};

crates/bevy_ui/src/render/render_pass.rs

@@ -1,4 +1,3 @@
-use bevy_core::FloatOrd;
 use bevy_ecs::{
     prelude::*,
     system::{lifetimeless::*, SystemParamItem},
@@ -13,6 +12,7 @@ use bevy_render::{
     renderer::*,
     view::*,
 };
+use bevy_utils::FloatOrd;
 
 use crate::prelude::CameraUi;
 

crates/bevy_utils/src/float_ord.rs

@@ -41,12 +41,12 @@ impl Hash for FloatOrd {
     fn hash<H: Hasher>(&self, state: &mut H) {
         if self.0.is_nan() {
             // Ensure all NaN representations hash to the same value
-            state.write(bytemuck::bytes_of(&f32::NAN));
+            state.write(&f32::to_ne_bytes(f32::NAN));
         } else if self.0 == 0.0 {
             // Ensure both zeroes hash to the same value
-            state.write(bytemuck::bytes_of(&0.0f32));
+            state.write(&f32::to_ne_bytes(0.0f32));
         } else {
-            state.write(bytemuck::bytes_of(&self.0));
+            state.write(&f32::to_ne_bytes(self.0));
         }
     }
 }

crates/bevy_utils/src/lib.rs

@@ -7,10 +7,12 @@ pub mod label;
 
 mod default;
 mod enum_variant_meta;
+mod float_ord;
 
 pub use ahash::AHasher;
 pub use default::default;
 pub use enum_variant_meta::*;
+pub use float_ord::*;
 pub use hashbrown;
 pub use instant::{Duration, Instant};
 pub use tracing;

examples/2d/mesh2d_manual.rs

@@ -1,5 +1,4 @@
 use bevy::{
-    core::FloatOrd,
     core_pipeline::Transparent2d,
     prelude::*,
     reflect::TypeUuid,
@@ -21,6 +20,7 @@ use bevy::{
         DrawMesh2d, Mesh2dHandle, Mesh2dPipeline, Mesh2dPipelineKey, Mesh2dUniform,
         SetMesh2dBindGroup, SetMesh2dViewBindGroup,
     },
+    utils::FloatOrd,
 };
 
 /// This example shows how to manually render 2d items using "mid level render apis" with a custom pipeline for 2d meshes