use channels

Cargo.toml

@@ -85,6 +85,8 @@ bevy_gltf = ["bevy_internal/bevy_gltf", "bevy_asset", "bevy_scene", "bevy_pbr"]
 # Adds PBR rendering
 bevy_pbr = ["bevy_internal/bevy_pbr", "bevy_asset", "bevy_render", "bevy_core_pipeline"]
 
+gpu_picking = []
+
 # Provides rendering functionality
 bevy_render = ["bevy_internal/bevy_render"]
 

crates/bevy_core_pipeline/src/core_3d/main_opaque_pass_3d_node.rs

@@ -7,7 +7,7 @@ use crate::{
 use bevy_ecs::{prelude::*, query::QueryItem};
 use bevy_render::{
     camera::ExtractedCamera,
-    picking::{EntityTextures, GpuPickingCamera},
+    picking::{EntityTextures, ExtractedGpuPickingCamera},
     render_graph::{NodeRunError, RenderGraphContext, ViewNode},
     render_phase::RenderPhase,
     render_resource::{
@@ -35,7 +35,7 @@ impl ViewNode for MainOpaquePass3dNode {
         Option<&'static DepthPrepass>,
         Option<&'static NormalPrepass>,
         Option<&'static MotionVectorPrepass>,
-        Option<&'static GpuPickingCamera>,
+        Option<&'static ExtractedGpuPickingCamera>,
         Option<&'static SkyboxPipelineId>,
         Option<&'static SkyboxBindGroup>,
         Option<&'static EntityTextures>,
@@ -84,7 +84,7 @@ impl ViewNode for MainOpaquePass3dNode {
                     load: match camera_3d.clear_color {
                         ClearColorConfig::None => LoadOp::Load,
                         // TODO clear this earlier?
-                        _ => LoadOp::Clear(EntityTextures::clear_color()),
+                        _ => LoadOp::Clear(EntityTextures::no_entity_color()),
                     },
                     store: true,
                 })));

crates/bevy_core_pipeline/src/core_3d/main_transparent_pass_3d_node.rs

@@ -2,7 +2,7 @@ use crate::core_3d::Transparent3d;
 use bevy_ecs::{prelude::*, query::QueryItem};
 use bevy_render::{
     camera::ExtractedCamera,
-    picking::{EntityTextures, GpuPickingCamera},
+    picking::{EntityTextures, ExtractedGpuPickingCamera},
     render_graph::{NodeRunError, RenderGraphContext, ViewNode},
     render_phase::RenderPhase,
     render_resource::{LoadOp, Operations, RenderPassDepthStencilAttachment, RenderPassDescriptor},
@@ -22,7 +22,7 @@ impl ViewNode for MainTransparentPass3dNode {
         &'static RenderPhase<Transparent3d>,
         &'static ViewTarget,
         &'static ViewDepthTexture,
-        Option<&'static GpuPickingCamera>,
+        Option<&'static ExtractedGpuPickingCamera>,
         Option<&'static EntityTextures>,
     );
     fn run(

crates/bevy_core_pipeline/src/core_3d/mod.rs

@@ -36,7 +36,7 @@ use bevy_ecs::prelude::*;
 use bevy_render::{
     camera::{Camera, ExtractedCamera},
     extract_component::ExtractComponentPlugin,
-    picking::{EntityTextures, GpuPickingCamera, ENTITY_TEXTURE_FORMAT},
+    picking::{EntityTextures, ExtractedGpuPickingCamera, ENTITY_TEXTURE_FORMAT},
     prelude::Msaa,
     render_graph::{EmptyNode, RenderGraphApp, ViewNodeRunner},
     render_phase::{
@@ -86,6 +86,7 @@ impl Plugin for Core3dPlugin {
                     prepare_core_3d_depth_textures
                         .in_set(RenderSet::Prepare)
                         .after(bevy_render::view::prepare_windows),
+                    // #[cfg(feature = "gpu_picking")]
                     prepare_entity_textures
                         .in_set(RenderSet::Prepare)
                         .after(bevy_render::view::prepare_windows),
@@ -322,13 +323,14 @@ pub fn prepare_core_3d_depth_textures(
     }
 }
 
+/// Create the required buffers based on the camera size
 pub fn prepare_entity_textures(
     mut commands: Commands,
     mut texture_cache: ResMut<TextureCache>,
     msaa: Res<Msaa>,
     render_device: Res<RenderDevice>,
     views_3d: Query<
-        (Entity, &ExtractedCamera, Option<&GpuPickingCamera>),
+        (Entity, &ExtractedCamera, Option<&ExtractedGpuPickingCamera>),
         (With<RenderPhase<Opaque3d>>, With<RenderPhase<AlphaMask3d>>),
     >,
 ) {
@@ -377,7 +379,6 @@ pub fn prepare_entity_textures(
                 )
             }),
         };
-
         commands.entity(entity).insert(entity_textures);
     }
 }

crates/bevy_core_pipeline/src/entity_index_buffer_copy/mod.rs

@@ -1,7 +1,7 @@
 use bevy_app::Plugin;
 use bevy_ecs::{query::QueryItem, world::World};
 use bevy_render::{
-    picking::{EntityTextures, GpuPickingCamera},
+    picking::{EntityTextures, ExtractedGpuPickingCamera},
     render_graph::{RenderGraphApp, RenderGraphContext, ViewNode, ViewNodeRunner},
     renderer::RenderContext,
     RenderApp,
@@ -12,7 +12,7 @@ use crate::core_3d::CORE_3D;
 #[derive(Default)]
 pub struct EntityIndexBufferCopyNode;
 impl ViewNode for EntityIndexBufferCopyNode {
-    type ViewQuery = (&'static EntityTextures, &'static GpuPickingCamera);
+    type ViewQuery = (&'static EntityTextures, &'static ExtractedGpuPickingCamera);
 
     fn run(
         &self,
@@ -21,29 +21,23 @@ impl ViewNode for EntityIndexBufferCopyNode {
         (entity_index_textures, gpu_picking_camera): QueryItem<Self::ViewQuery>,
         _world: &World,
     ) -> Result<(), bevy_render::render_graph::NodeRunError> {
-        let Ok(mut guard) = gpu_picking_camera.0.try_lock() else { return Ok(()); };
-        let Some(buffers) = guard.as_mut() else { return Ok(()); };
+        let Some(buffers) = gpu_picking_camera.buffers.as_ref() else {
+            return Ok(());
+        };
 
-        // copy entity index texture
         buffers.copy_texture_to_buffer(
             render_context.command_encoder(),
             &entity_index_textures.main.texture,
-            &buffers.entity_buffer,
         );
 
-        // TODO copy depth
-
         Ok(())
     }
 }
 
 pub struct EntityIndexBufferCopyPlugin;
 impl Plugin for EntityIndexBufferCopyPlugin {
     fn build(&self, app: &mut bevy_app::App) {
-        let render_app = match app.get_sub_app_mut(RenderApp) {
-            Ok(render_app) => render_app,
-            Err(_) => return,
-        };
+        let Ok(render_app) = app.get_sub_app_mut(RenderApp) else { return; };
 
         // 3D
         use crate::core_3d::graph::node::*;

crates/bevy_gizmos/src/lib.rs

@@ -37,14 +37,16 @@ use bevy_reflect::{
 use bevy_render::{
     color::Color,
     mesh::Mesh,
-    picking,
     primitives::Aabb,
     render_phase::AddRenderCommand,
     render_resource::{PrimitiveTopology, Shader, SpecializedMeshPipelines},
     Extract, ExtractSchedule, Render, RenderApp, RenderSet,
 };
 use bevy_transform::components::{GlobalTransform, Transform};
 
+// #[cfg(feature = "gpu_picking")]
+use bevy_render::picking;
+
 #[cfg(feature = "bevy_pbr")]
 use bevy_pbr::MeshUniform;
 #[cfg(feature = "bevy_sprite")]
@@ -326,6 +328,7 @@ fn extract_gizmo_data(
                             transform,
                             previous_transform: transform,
                             inverse_transpose_model,
+                            // #[cfg(feature = "gpu_picking")]
                             entity: picking::entity_as_uvec2(Entity::PLACEHOLDER),
                         },
                     ),

crates/bevy_pbr/Cargo.toml

@@ -10,6 +10,7 @@ keywords = ["bevy"]
 
 [features]
 webgl = []
+gpu_picking = []
 
 [dependencies]
 # bevy

crates/bevy_pbr/src/material.rs

@@ -23,7 +23,7 @@ use bevy_reflect::{TypePath, TypeUuid};
 use bevy_render::{
     extract_component::ExtractComponentPlugin,
     mesh::{Mesh, MeshVertexBufferLayout},
-    picking::{GpuPickingCamera, GpuPickingMesh},
+    picking::{ExtractedGpuPickingCamera, GpuPickingMesh},
     prelude::Image,
     render_asset::{PrepareAssetSet, RenderAssets},
     render_phase::{
@@ -394,7 +394,7 @@ pub fn queue_material_meshes<M: Material>(
         Option<&DebandDither>,
         Option<&EnvironmentMapLight>,
         Option<&NormalPrepass>,
-        Option<&GpuPickingCamera>,
+        Option<&ExtractedGpuPickingCamera>,
         Option<&TemporalAntiAliasSettings>,
         &mut RenderPhase<Opaque3d>,
         &mut RenderPhase<AlphaMask3d>,

crates/bevy_pbr/src/render/mesh.rs

@@ -132,7 +132,7 @@ pub struct MeshUniform {
     pub transform: Mat4,
     pub previous_transform: Mat4,
     pub inverse_transpose_model: Mat4,
-    // TODO should probably be a separate uniform in case gpu picking is disabled
+    // #[cfg(feature = "gpu_picking")]
     pub entity: UVec2,
     pub flags: u32,
 }
@@ -187,6 +187,7 @@ pub fn extract_meshes(
             flags: flags.bits(),
             transform,
             previous_transform,
+            // #[cfg(feature = "gpu_picking")]
             entity: picking::entity_as_uvec2(entity),
             inverse_transpose_model: transform.inverse().transpose(),
         };

crates/bevy_render/src/lib.rs

@@ -45,7 +45,6 @@ pub mod prelude {
 use bevy_window::{PrimaryWindow, RawHandleWrapper};
 use globals::GlobalsPlugin;
 pub use once_cell;
-use picking::GpuPickingPlugin;
 use renderer::{RenderAdapter, RenderAdapterInfo, RenderDevice, RenderQueue};
 use wgpu::Instance;
 
@@ -336,8 +335,7 @@ impl Plugin for RenderPlugin {
             .add_plugin(CameraPlugin)
             .add_plugin(ViewPlugin)
             .add_plugin(MeshPlugin)
-            .add_plugin(GlobalsPlugin)
-            .add_plugin(GpuPickingPlugin);
+            .add_plugin(GlobalsPlugin);
 
         app.register_type::<color::Color>()
             .register_type::<primitives::Aabb>()