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use crate::MeshPipeline;
use crate::{DrawMesh, MeshPipelineKey, MeshUniform, SetMeshBindGroup, SetMeshViewBindGroup};
use bevy_app::Plugin;
use bevy_asset::{load_internal_asset, Handle, HandleUntyped};
use bevy_core_pipeline::core_3d::Opaque3d;
use bevy_ecs::{prelude::*, reflect::ReflectComponent};
use bevy_reflect::std_traits::ReflectDefault;
use bevy_reflect::{Reflect, TypeUuid};
use bevy_render::extract_component::{ExtractComponent, ExtractComponentPlugin};
use bevy_render::{
extract_resource::{ExtractResource, ExtractResourcePlugin},
mesh::{Mesh, MeshVertexBufferLayout},
render_asset::RenderAssets,
render_phase::{AddRenderCommand, DrawFunctions, RenderPhase, SetItemPipeline},
render_resource::{
PipelineCache, PolygonMode, RenderPipelineDescriptor, Shader, SpecializedMeshPipeline,
SpecializedMeshPipelineError, SpecializedMeshPipelines,
},
view::{ExtractedView, Msaa, VisibleEntities},
RenderApp, RenderSet,
};
use bevy_utils::tracing::error;
pub const WIREFRAME_SHADER_HANDLE: HandleUntyped =
HandleUntyped::weak_from_u64(Shader::TYPE_UUID, 192598014480025766);
#[derive(Debug, Default)]
pub struct WireframePlugin;
impl Plugin for WireframePlugin {
fn build(&self, app: &mut bevy_app::App) {
load_internal_asset!(
app,
WIREFRAME_SHADER_HANDLE,
"render/wireframe.wgsl",
Shader::from_wgsl
);
app.register_type::<Wireframe>()
.register_type::<WireframeConfig>()
.init_resource::<WireframeConfig>()
.add_plugin(ExtractResourcePlugin::<WireframeConfig>::default())
.add_plugin(ExtractComponentPlugin::<Wireframe>::default());
if let Ok(render_app) = app.get_sub_app_mut(RenderApp) {
render_app
.add_render_command::<Opaque3d, DrawWireframes>()
.init_resource::<WireframePipeline>()
.init_resource::<SpecializedMeshPipelines<WireframePipeline>>()
.add_system(queue_wireframes.in_set(RenderSet::Queue));
}
}
}
#[derive(Component, Debug, Clone, Default, ExtractComponent, Reflect)]
#[reflect(Component, Default)]
pub struct Wireframe;
#[derive(Resource, Debug, Clone, Default, ExtractResource, Reflect)]
#[reflect(Resource)]
pub struct WireframeConfig {
pub global: bool,
}
#[derive(Resource, Clone)]
pub struct WireframePipeline {
mesh_pipeline: MeshPipeline,
shader: Handle<Shader>,
}
impl FromWorld for WireframePipeline {
fn from_world(render_world: &mut World) -> Self {
WireframePipeline {
mesh_pipeline: render_world.resource::<MeshPipeline>().clone(),
shader: WIREFRAME_SHADER_HANDLE.typed(),
}
}
}
impl SpecializedMeshPipeline for WireframePipeline {
type Key = MeshPipelineKey;
fn specialize(
&self,
key: Self::Key,
layout: &MeshVertexBufferLayout,
) -> Result<RenderPipelineDescriptor, SpecializedMeshPipelineError> {
let mut descriptor = self.mesh_pipeline.specialize(key, layout)?;
descriptor.vertex.shader = self.shader.clone_weak();
descriptor.fragment.as_mut().unwrap().shader = self.shader.clone_weak();
descriptor.primitive.polygon_mode = PolygonMode::Line;
descriptor.depth_stencil.as_mut().unwrap().bias.slope_scale = 1.0;
Ok(descriptor)
}
}
#[allow(clippy::too_many_arguments)]
fn queue_wireframes(
opaque_3d_draw_functions: Res<DrawFunctions<Opaque3d>>,
render_meshes: Res<RenderAssets<Mesh>>,
wireframe_config: Res<WireframeConfig>,
wireframe_pipeline: Res<WireframePipeline>,
mut pipelines: ResMut<SpecializedMeshPipelines<WireframePipeline>>,
pipeline_cache: Res<PipelineCache>,
msaa: Res<Msaa>,
mut material_meshes: ParamSet<(
Query<(Entity, &Handle<Mesh>, &MeshUniform)>,
Query<(Entity, &Handle<Mesh>, &MeshUniform), With<Wireframe>>,
)>,
mut views: Query<(&ExtractedView, &VisibleEntities, &mut RenderPhase<Opaque3d>)>,
) {
let draw_custom = opaque_3d_draw_functions.read().id::<DrawWireframes>();
let msaa_key = MeshPipelineKey::from_msaa_samples(msaa.samples());
for (view, visible_entities, mut opaque_phase) in &mut views {
let rangefinder = view.rangefinder3d();
let view_key = msaa_key | MeshPipelineKey::from_hdr(view.hdr);
let add_render_phase =
|(entity, mesh_handle, mesh_uniform): (Entity, &Handle<Mesh>, &MeshUniform)| {
if let Some(mesh) = render_meshes.get(mesh_handle) {
let key = view_key
| MeshPipelineKey::from_primitive_topology(mesh.primitive_topology);
let pipeline_id = pipelines.specialize(
&pipeline_cache,
&wireframe_pipeline,
key,
&mesh.layout,
);
let pipeline_id = match pipeline_id {
Ok(id) => id,
Err(err) => {
error!("{}", err);
return;
}
};
opaque_phase.add(Opaque3d {
entity,
pipeline: pipeline_id,
draw_function: draw_custom,
distance: rangefinder.distance(&mesh_uniform.transform),
});
}
};
if wireframe_config.global {
let query = material_meshes.p0();
visible_entities
.entities
.iter()
.filter_map(|visible_entity| query.get(*visible_entity).ok())
.for_each(add_render_phase);
} else {
let query = material_meshes.p1();
visible_entities
.entities
.iter()
.filter_map(|visible_entity| query.get(*visible_entity).ok())
.for_each(add_render_phase);
}
}
}
type DrawWireframes = (
SetItemPipeline,
SetMeshViewBindGroup<0>,
SetMeshBindGroup<1>,
DrawMesh,
);