Reflect default in some types on bevy_render (#12580)

# Objective

- Many types in bevy_render doesn't reflect Default even if it could.

## Solution

- Reflect it.

---

---------

Co-authored-by: Pablo Reinhardt <pabloreinhardt@gmail.com>

crates/bevy_render/src/camera/camera.rs

@@ -88,7 +88,7 @@ pub struct ComputedCameraValues {
 ///
 /// <https://en.wikipedia.org/wiki/Exposure_(photography)>
 #[derive(Component, Clone, Copy, Reflect)]
-#[reflect_value(Component)]
+#[reflect_value(Component, Default)]
 pub struct Exposure {
     /// <https://en.wikipedia.org/wiki/Exposure_value#Tabulated_exposure_values>
     pub ev100: f32,
@@ -184,7 +184,7 @@ impl Default for PhysicalCameraParameters {
 /// Adding a camera is typically done by adding a bundle, either the `Camera2dBundle` or the
 /// `Camera3dBundle`.
 #[derive(Component, Debug, Reflect, Clone)]
-#[reflect(Component)]
+#[reflect(Component, Default)]
 pub struct Camera {
     /// If set, this camera will render to the given [`Viewport`] rectangle within the configured [`RenderTarget`].
     pub viewport: Option<Viewport>,
@@ -771,7 +771,7 @@ pub fn camera_system<T: CameraProjection + Component>(
 
 /// This component lets you control the [`TextureUsages`] field of the main texture generated for the camera
 #[derive(Component, ExtractComponent, Clone, Copy, Reflect)]
-#[reflect_value(Component)]
+#[reflect_value(Component, Default)]
 pub struct CameraMainTextureUsages(pub TextureUsages);
 impl Default for CameraMainTextureUsages {
     fn default() -> Self {

crates/bevy_render/src/camera/clear_color.rs

@@ -2,12 +2,12 @@ use crate::extract_resource::ExtractResource;
 use bevy_color::Color;
 use bevy_derive::{Deref, DerefMut};
 use bevy_ecs::prelude::*;
-use bevy_reflect::{Reflect, ReflectDeserialize, ReflectSerialize};
+use bevy_reflect::prelude::*;
 use serde::{Deserialize, Serialize};
 
 /// For a camera, specifies the color used to clear the viewport before rendering.
 #[derive(Reflect, Serialize, Deserialize, Clone, Debug, Default)]
-#[reflect(Serialize, Deserialize)]
+#[reflect(Serialize, Deserialize, Default)]
 pub enum ClearColorConfig {
     /// The clear color is taken from the world's [`ClearColor`] resource.
     #[default]
@@ -31,7 +31,7 @@ impl From<Color> for ClearColorConfig {
 /// This color appears as the "background" color for simple apps,
 /// when there are portions of the screen with nothing rendered.
 #[derive(Resource, Clone, Debug, Deref, DerefMut, ExtractResource, Reflect)]
-#[reflect(Resource)]
+#[reflect(Resource, Default)]
 pub struct ClearColor(pub Color);
 
 /// Match the dark gray bevy website code block color by default.

crates/bevy_render/src/globals.rs

@@ -9,7 +9,7 @@ use bevy_app::{App, Plugin};
 use bevy_asset::{load_internal_asset, Handle};
 use bevy_core::FrameCount;
 use bevy_ecs::prelude::*;
-use bevy_reflect::Reflect;
+use bevy_reflect::prelude::*;
 use bevy_time::Time;
 
 pub const GLOBALS_TYPE_HANDLE: Handle<Shader> = Handle::weak_from_u128(17924628719070609599);
@@ -45,7 +45,7 @@ fn extract_time(mut commands: Commands, time: Extract<Res<Time>>) {
 /// Contains global values useful when writing shaders.
 /// Currently only contains values related to time.
 #[derive(Default, Clone, Resource, ExtractResource, Reflect, ShaderType)]
-#[reflect(Resource)]
+#[reflect(Resource, Default)]
 pub struct GlobalsUniform {
     /// The time since startup in seconds.
     /// Wraps to 0 after 1 hour.

crates/bevy_render/src/mesh/mesh/skinning.rs

@@ -6,11 +6,11 @@ use bevy_ecs::{
     reflect::ReflectMapEntities,
 };
 use bevy_math::Mat4;
-use bevy_reflect::{Reflect, TypePath};
+use bevy_reflect::prelude::*;
 use std::ops::Deref;
 
 #[derive(Component, Debug, Default, Clone, Reflect)]
-#[reflect(Component, MapEntities)]
+#[reflect(Component, MapEntities, Default)]
 pub struct SkinnedMesh {
     pub inverse_bindposes: Handle<SkinnedMeshInverseBindposes>,
     pub joints: Vec<Entity>,

crates/bevy_render/src/mesh/morph.rs

@@ -9,7 +9,7 @@ use bevy_asset::Handle;
 use bevy_ecs::prelude::*;
 use bevy_hierarchy::Children;
 use bevy_math::Vec3;
-use bevy_reflect::Reflect;
+use bevy_reflect::prelude::*;
 use bytemuck::{Pod, Zeroable};
 use std::{iter, mem};
 use thiserror::Error;
@@ -128,7 +128,7 @@ impl MorphTargetImage {
 ///
 /// [morph targets]: https://en.wikipedia.org/wiki/Morph_target_animation
 #[derive(Reflect, Default, Debug, Clone, Component)]
-#[reflect(Debug, Component)]
+#[reflect(Debug, Component, Default)]
 pub struct MorphWeights {
     weights: Vec<f32>,
     /// The first mesh primitive assigned to these weights
@@ -173,7 +173,7 @@ impl MorphWeights {
 ///
 /// [morph targets]: https://en.wikipedia.org/wiki/Morph_target_animation
 #[derive(Reflect, Default, Debug, Clone, Component)]
-#[reflect(Debug, Component)]
+#[reflect(Debug, Component, Default)]
 pub struct MeshMorphWeights {
     weights: Vec<f32>,
 }

crates/bevy_render/src/primitives/mod.rs

@@ -2,7 +2,7 @@ use std::borrow::Borrow;
 
 use bevy_ecs::{component::Component, entity::EntityHashMap, reflect::ReflectComponent};
 use bevy_math::{Affine3A, Mat3A, Mat4, Vec3, Vec3A, Vec4, Vec4Swizzles};
-use bevy_reflect::Reflect;
+use bevy_reflect::prelude::*;
 
 /// An axis-aligned bounding box, defined by:
 /// - a center,
@@ -31,7 +31,7 @@ use bevy_reflect::Reflect;
 /// [`Mesh`]: crate::mesh::Mesh
 /// [`Handle<Mesh>`]: crate::mesh::Mesh
 #[derive(Component, Clone, Copy, Debug, Default, Reflect, PartialEq)]
-#[reflect(Component)]
+#[reflect(Component, Default)]
 pub struct Aabb {
     pub center: Vec3A,
     pub half_extents: Vec3A,
@@ -212,7 +212,7 @@ impl HalfSpace {
 /// [`CameraProjection`]: crate::camera::CameraProjection
 /// [`GlobalTransform`]: bevy_transform::components::GlobalTransform
 #[derive(Component, Clone, Copy, Debug, Default, Reflect)]
-#[reflect(Component)]
+#[reflect(Component, Default)]
 pub struct Frustum {
     #[reflect(ignore)]
     pub half_spaces: [HalfSpace; 6],
@@ -303,7 +303,7 @@ impl Frustum {
 }
 
 #[derive(Component, Clone, Debug, Default, Reflect)]
-#[reflect(Component)]
+#[reflect(Component, Default)]
 pub struct CubemapFrusta {
     #[reflect(ignore)]
     pub frusta: [Frustum; 6],
@@ -319,7 +319,7 @@ impl CubemapFrusta {
 }
 
 #[derive(Component, Debug, Default, Reflect)]
-#[reflect(Component)]
+#[reflect(Component, Default)]
 pub struct CascadesFrusta {
     #[reflect(ignore)]
     pub frusta: EntityHashMap<Vec<Frustum>>,

crates/bevy_render/src/texture/image.rs

@@ -15,7 +15,7 @@ use bevy_asset::Asset;
 use bevy_derive::{Deref, DerefMut};
 use bevy_ecs::system::{lifetimeless::SRes, Resource, SystemParamItem};
 use bevy_math::{AspectRatio, UVec2, Vec2};
-use bevy_reflect::Reflect;
+use bevy_reflect::prelude::*;
 use serde::{Deserialize, Serialize};
 use std::hash::Hash;
 use thiserror::Error;
@@ -112,7 +112,7 @@ impl ImageFormat {
 }
 
 #[derive(Asset, Reflect, Debug, Clone)]
-#[reflect_value]
+#[reflect_value(Default)]
 pub struct Image {
     pub data: Vec<u8>,
     // TODO: this nesting makes accessing Image metadata verbose. Either flatten out descriptor or add accessors

crates/bevy_render/src/view/mod.rs

@@ -90,7 +90,7 @@ impl Plugin for ViewPlugin {
 #[derive(
     Resource, Default, Clone, Copy, ExtractResource, Reflect, PartialEq, PartialOrd, Debug,
 )]
-#[reflect(Resource)]
+#[reflect(Resource, Default)]
 pub enum Msaa {
     Off = 1,
     Sample2 = 2,

crates/bevy_render/src/view/visibility/mod.rs

@@ -168,7 +168,7 @@ pub struct NoFrustumCulling;
 /// This component is intended to be attached to the same entity as the [`Camera`] and
 /// the [`Frustum`] defining the view.
 #[derive(Clone, Component, Default, Debug, Reflect)]
-#[reflect(Component)]
+#[reflect(Component, Default)]
 pub struct VisibleEntities {
     #[reflect(ignore)]
     pub entities: Vec<Entity>,