Make more things pub in the renderer (#12053)

# Objective

- Some properties of public types are private but sometimes it's useful
to be able to set those

## Solution

- Make more stuff pub

---

## Changelog

- `MaterialBindGroupId` internal id is now pub and added a new()
constructor
- `ExtractedPointLight` and `ExtractedDirectionalLight` properties are
now all pub

---------

Co-authored-by: James Liu <contact@jamessliu.com>

crates/bevy_pbr/src/material.rs

@@ -794,7 +794,19 @@ pub struct PreparedMaterial<T: Material> {
 }
 
 #[derive(Component, Clone, Copy, Default, PartialEq, Eq, Deref, DerefMut)]
-pub struct MaterialBindGroupId(Option<BindGroupId>);
+pub struct MaterialBindGroupId(pub Option<BindGroupId>);
+
+impl MaterialBindGroupId {
+    pub fn new(id: BindGroupId) -> Self {
+        Self(Some(id))
+    }
+}
+
+impl From<BindGroup> for MaterialBindGroupId {
+    fn from(value: BindGroup) -> Self {
+        Self::new(value.id())
+    }
+}
 
 /// An atomic version of [`MaterialBindGroupId`] that can be read from and written to
 /// safely from multiple threads.

crates/bevy_pbr/src/render/light.rs

@@ -29,30 +29,30 @@ use crate::*;
 
 #[derive(Component)]
 pub struct ExtractedPointLight {
-    color: Color,
+    pub color: Color,
     /// luminous intensity in lumens per steradian
-    intensity: f32,
-    range: f32,
-    radius: f32,
-    transform: GlobalTransform,
-    shadows_enabled: bool,
-    shadow_depth_bias: f32,
-    shadow_normal_bias: f32,
-    spot_light_angles: Option<(f32, f32)>,
+    pub intensity: f32,
+    pub range: f32,
+    pub radius: f32,
+    pub transform: GlobalTransform,
+    pub shadows_enabled: bool,
+    pub shadow_depth_bias: f32,
+    pub shadow_normal_bias: f32,
+    pub spot_light_angles: Option<(f32, f32)>,
 }
 
 #[derive(Component, Debug)]
 pub struct ExtractedDirectionalLight {
-    color: Color,
-    illuminance: f32,
-    transform: GlobalTransform,
-    shadows_enabled: bool,
-    shadow_depth_bias: f32,
-    shadow_normal_bias: f32,
-    cascade_shadow_config: CascadeShadowConfig,
-    cascades: EntityHashMap<Vec<Cascade>>,
-    frusta: EntityHashMap<Vec<Frustum>>,
-    render_layers: RenderLayers,
+    pub color: Color,
+    pub illuminance: f32,
+    pub transform: GlobalTransform,
+    pub shadows_enabled: bool,
+    pub shadow_depth_bias: f32,
+    pub shadow_normal_bias: f32,
+    pub cascade_shadow_config: CascadeShadowConfig,
+    pub cascades: EntityHashMap<Vec<Cascade>>,
+    pub frusta: EntityHashMap<Vec<Frustum>>,
+    pub render_layers: RenderLayers,
 }
 
 #[derive(Copy, Clone, ShaderType, Default, Debug)]