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bevy/crates/bevy_pbr/src/render/mesh.rs
Carter Anderson e9f52b9dd2 Move import_path definitions into shader source (#3976) 
This enables shaders to (optionally) define their import path inside their source. This has a number of benefits:

1. enables users to define their own custom paths directly in their assets
2. moves the import path "close" to the asset instead of centralized in the plugin definition, which seems "better" to me. 
3. makes "internal hot shader reloading" way more reasonable (see #3966)
4. logically opens the door to importing "parts" of a shader by defining "import_path blocks".

```rust
#define_import_path bevy_pbr::mesh_struct

struct Mesh {
    model: mat4x4<f32>;
    inverse_transpose_model: mat4x4<f32>;
    // 'flags' is a bit field indicating various options. u32 is 32 bits so we have up to 32 options.
    flags: u32;
};

let MESH_FLAGS_SHADOW_RECEIVER_BIT: u32 = 1u;
```
2022-02-18 21:54:03 +00:00

752 lines
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use crate::{
GlobalLightMeta, GpuLights, LightMeta, NotShadowCaster, NotShadowReceiver, ShadowPipeline,
ViewClusterBindings, ViewLightsUniformOffset, ViewShadowBindings,
};
use bevy_app::Plugin;
use bevy_asset::{Assets, Handle, HandleUntyped};
use bevy_ecs::{
prelude::*,
system::{lifetimeless::*, SystemParamItem},
};
use bevy_math::{Mat4, Size};
use bevy_reflect::TypeUuid;
use bevy_render::{
mesh::{GpuBufferInfo, Mesh},
render_asset::RenderAssets,
render_component::{ComponentUniforms, DynamicUniformIndex, UniformComponentPlugin},
render_phase::{EntityRenderCommand, RenderCommandResult, TrackedRenderPass},
render_resource::{std140::AsStd140, *},
renderer::{RenderDevice, RenderQueue},
texture::{BevyDefault, GpuImage, Image, TextureFormatPixelInfo},
view::{ComputedVisibility, ViewUniform, ViewUniformOffset, ViewUniforms},
RenderApp, RenderStage,
};
use bevy_transform::components::GlobalTransform;
#[derive(Default)]
pub struct MeshRenderPlugin;
pub const MESH_VIEW_BIND_GROUP_HANDLE: HandleUntyped =
HandleUntyped::weak_from_u64(Shader::TYPE_UUID, 9076678235888822571);
pub const MESH_STRUCT_HANDLE: HandleUntyped =
HandleUntyped::weak_from_u64(Shader::TYPE_UUID, 2506024101911992377);
pub const MESH_SHADER_HANDLE: HandleUntyped =
HandleUntyped::weak_from_u64(Shader::TYPE_UUID, 3252377289100772450);
impl Plugin for MeshRenderPlugin {
fn build(&self, app: &mut bevy_app::App) {
let mut shaders = app.world.get_resource_mut::<Assets<Shader>>().unwrap();
shaders.set_untracked(
MESH_SHADER_HANDLE,
Shader::from_wgsl(include_str!("mesh.wgsl")),
);
shaders.set_untracked(
MESH_STRUCT_HANDLE,
Shader::from_wgsl(include_str!("mesh_struct.wgsl")),
);
shaders.set_untracked(
MESH_VIEW_BIND_GROUP_HANDLE,
Shader::from_wgsl(include_str!("mesh_view_bind_group.wgsl")),
);
app.add_plugin(UniformComponentPlugin::<MeshUniform>::default());
if let Ok(render_app) = app.get_sub_app_mut(RenderApp) {
render_app
.init_resource::<MeshPipeline>()
.add_system_to_stage(RenderStage::Extract, extract_meshes)
.add_system_to_stage(RenderStage::Queue, queue_mesh_bind_group)
.add_system_to_stage(RenderStage::Queue, queue_mesh_view_bind_groups);
}
}
}
#[derive(Component, AsStd140, Clone)]
pub struct MeshUniform {
pub transform: Mat4,
pub inverse_transpose_model: Mat4,
pub flags: u32,
}
// NOTE: These must match the bit flags in bevy_pbr2/src/render/mesh.wgsl!
bitflags::bitflags! {
#[repr(transparent)]
struct MeshFlags: u32 {
const SHADOW_RECEIVER = (1 << 0);
const NONE = 0;
const UNINITIALIZED = 0xFFFF;
}
}
pub fn extract_meshes(
mut commands: Commands,
mut previous_caster_len: Local<usize>,
mut previous_not_caster_len: Local<usize>,
caster_query: Query<
(
Entity,
&ComputedVisibility,
&GlobalTransform,
&Handle<Mesh>,
Option<&NotShadowReceiver>,
),
Without<NotShadowCaster>,
>,
not_caster_query: Query<
(
Entity,
&ComputedVisibility,
&GlobalTransform,
&Handle<Mesh>,
Option<&NotShadowReceiver>,
),
With<NotShadowCaster>,
>,
) {
let mut caster_values = Vec::with_capacity(*previous_caster_len);
for (entity, computed_visibility, transform, handle, not_receiver) in caster_query.iter() {
if !computed_visibility.is_visible {
continue;
}
let transform = transform.compute_matrix();
caster_values.push((
entity,
(
handle.clone_weak(),
MeshUniform {
flags: if not_receiver.is_some() {
MeshFlags::empty().bits
} else {
MeshFlags::SHADOW_RECEIVER.bits
},
transform,
inverse_transpose_model: transform.inverse().transpose(),
},
),
));
}
*previous_caster_len = caster_values.len();
commands.insert_or_spawn_batch(caster_values);
let mut not_caster_values = Vec::with_capacity(*previous_not_caster_len);
for (entity, computed_visibility, transform, handle, not_receiver) in not_caster_query.iter() {
if !computed_visibility.is_visible {
continue;
}
let transform = transform.compute_matrix();
not_caster_values.push((
entity,
(
handle.clone_weak(),
MeshUniform {
flags: if not_receiver.is_some() {
MeshFlags::empty().bits
} else {
MeshFlags::SHADOW_RECEIVER.bits
},
transform,
inverse_transpose_model: transform.inverse().transpose(),
},
NotShadowCaster,
),
));
}
*previous_not_caster_len = not_caster_values.len();
commands.insert_or_spawn_batch(not_caster_values);
}
#[derive(Clone)]
pub struct MeshPipeline {
pub view_layout: BindGroupLayout,
pub mesh_layout: BindGroupLayout,
// This dummy white texture is to be used in place of optional StandardMaterial textures
pub dummy_white_gpu_image: GpuImage,
}
impl FromWorld for MeshPipeline {
fn from_world(world: &mut World) -> Self {
let render_device = world.get_resource::<RenderDevice>().unwrap();
let view_layout = render_device.create_bind_group_layout(&BindGroupLayoutDescriptor {
entries: &[
// View
BindGroupLayoutEntry {
binding: 0,
visibility: ShaderStages::VERTEX | ShaderStages::FRAGMENT,
ty: BindingType::Buffer {
ty: BufferBindingType::Uniform,
has_dynamic_offset: true,
min_binding_size: BufferSize::new(ViewUniform::std140_size_static() as u64),
},
count: None,
},
// Lights
BindGroupLayoutEntry {
binding: 1,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Buffer {
ty: BufferBindingType::Uniform,
has_dynamic_offset: true,
min_binding_size: BufferSize::new(GpuLights::std140_size_static() as u64),
},
count: None,
},
// Point Shadow Texture Cube Array
BindGroupLayoutEntry {
binding: 2,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Texture {
multisampled: false,
sample_type: TextureSampleType::Depth,
#[cfg(not(feature = "webgl"))]
view_dimension: TextureViewDimension::CubeArray,
#[cfg(feature = "webgl")]
view_dimension: TextureViewDimension::Cube,
},
count: None,
},
// Point Shadow Texture Array Sampler
BindGroupLayoutEntry {
binding: 3,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Sampler(SamplerBindingType::Comparison),
count: None,
},
// Directional Shadow Texture Array
BindGroupLayoutEntry {
binding: 4,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Texture {
multisampled: false,
sample_type: TextureSampleType::Depth,
#[cfg(not(feature = "webgl"))]
view_dimension: TextureViewDimension::D2Array,
#[cfg(feature = "webgl")]
view_dimension: TextureViewDimension::D2,
},
count: None,
},
// Directional Shadow Texture Array Sampler
BindGroupLayoutEntry {
binding: 5,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Sampler(SamplerBindingType::Comparison),
count: None,
},
// PointLights
BindGroupLayoutEntry {
binding: 6,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Buffer {
ty: BufferBindingType::Uniform,
has_dynamic_offset: false,
// NOTE: Static size for uniform buffers. GpuPointLight has a padded
// size of 64 bytes, so 16384 / 64 = 256 point lights max
min_binding_size: BufferSize::new(16384),
},
count: None,
},
// ClusteredLightIndexLists
BindGroupLayoutEntry {
binding: 7,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Buffer {
ty: BufferBindingType::Uniform,
has_dynamic_offset: false,
// NOTE: With 256 point lights max, indices need 8 bits so use u8
min_binding_size: BufferSize::new(16384),
},
count: None,
},
// ClusterOffsetsAndCounts
BindGroupLayoutEntry {
binding: 8,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Buffer {
ty: BufferBindingType::Uniform,
has_dynamic_offset: false,
// NOTE: The offset needs to address 16384 indices, which needs 14 bits.
// The count can be at most all 256 lights so 8 bits.
// Pack the offset into the upper 24 bits and the count into the
// lower 8 bits.
min_binding_size: BufferSize::new(16384),
},
count: None,
},
],
label: Some("mesh_view_layout"),
});
let mesh_layout = render_device.create_bind_group_layout(&BindGroupLayoutDescriptor {
entries: &[BindGroupLayoutEntry {
binding: 0,
visibility: ShaderStages::VERTEX | ShaderStages::FRAGMENT,
ty: BindingType::Buffer {
ty: BufferBindingType::Uniform,
has_dynamic_offset: true,
min_binding_size: BufferSize::new(MeshUniform::std140_size_static() as u64),
},
count: None,
}],
label: Some("mesh_layout"),
});
// A 1x1x1 'all 1.0' texture to use as a dummy texture to use in place of optional StandardMaterial textures
let dummy_white_gpu_image = {
let image = Image::new_fill(
Extent3d::default(),
TextureDimension::D2,
&[255u8; 4],
TextureFormat::bevy_default(),
);
let texture = render_device.create_texture(&image.texture_descriptor);
let sampler = render_device.create_sampler(&image.sampler_descriptor);
let format_size = image.texture_descriptor.format.pixel_size();
let render_queue = world.get_resource_mut::<RenderQueue>().unwrap();
render_queue.write_texture(
ImageCopyTexture {
texture: &texture,
mip_level: 0,
origin: Origin3d::ZERO,
aspect: TextureAspect::All,
},
&image.data,
ImageDataLayout {
offset: 0,
bytes_per_row: Some(
std::num::NonZeroU32::new(
image.texture_descriptor.size.width * format_size as u32,
)
.unwrap(),
),
rows_per_image: None,
},
image.texture_descriptor.size,
);
let texture_view = texture.create_view(&TextureViewDescriptor::default());
GpuImage {
texture,
texture_view,
sampler,
size: Size::new(
image.texture_descriptor.size.width as f32,
image.texture_descriptor.size.height as f32,
),
}
};
MeshPipeline {
view_layout,
mesh_layout,
dummy_white_gpu_image,
}
}
}
impl MeshPipeline {
pub fn get_image_texture<'a>(
&'a self,
gpu_images: &'a RenderAssets<Image>,
handle_option: &Option<Handle<Image>>,
) -> Option<(&'a TextureView, &'a Sampler)> {
if let Some(handle) = handle_option {
let gpu_image = gpu_images.get(handle)?;
Some((&gpu_image.texture_view, &gpu_image.sampler))
} else {
Some((
&self.dummy_white_gpu_image.texture_view,
&self.dummy_white_gpu_image.sampler,
))
}
}
}
bitflags::bitflags! {
#[repr(transparent)]
// NOTE: Apparently quadro drivers support up to 64x MSAA.
/// MSAA uses the highest 6 bits for the MSAA sample count - 1 to support up to 64x MSAA.
pub struct MeshPipelineKey: u32 {
const NONE = 0;
const VERTEX_TANGENTS = (1 << 0);
const TRANSPARENT_MAIN_PASS = (1 << 1);
const MSAA_RESERVED_BITS = MeshPipelineKey::MSAA_MASK_BITS << MeshPipelineKey::MSAA_SHIFT_BITS;
const PRIMITIVE_TOPOLOGY_RESERVED_BITS = MeshPipelineKey::PRIMITIVE_TOPOLOGY_MASK_BITS << MeshPipelineKey::PRIMITIVE_TOPOLOGY_SHIFT_BITS;
}
}
impl MeshPipelineKey {
const MSAA_MASK_BITS: u32 = 0b111111;
const MSAA_SHIFT_BITS: u32 = 32 - 6;
const PRIMITIVE_TOPOLOGY_MASK_BITS: u32 = 0b111;
const PRIMITIVE_TOPOLOGY_SHIFT_BITS: u32 = Self::MSAA_SHIFT_BITS - 3;
pub fn from_msaa_samples(msaa_samples: u32) -> Self {
let msaa_bits = ((msaa_samples - 1) & Self::MSAA_MASK_BITS) << Self::MSAA_SHIFT_BITS;
MeshPipelineKey::from_bits(msaa_bits).unwrap()
}
pub fn msaa_samples(&self) -> u32 {
((self.bits >> Self::MSAA_SHIFT_BITS) & Self::MSAA_MASK_BITS) + 1
}
pub fn from_primitive_topology(primitive_topology: PrimitiveTopology) -> Self {
let primitive_topology_bits = ((primitive_topology as u32)
& Self::PRIMITIVE_TOPOLOGY_MASK_BITS)
<< Self::PRIMITIVE_TOPOLOGY_SHIFT_BITS;
MeshPipelineKey::from_bits(primitive_topology_bits).unwrap()
}
pub fn primitive_topology(&self) -> PrimitiveTopology {
let primitive_topology_bits =
(self.bits >> Self::PRIMITIVE_TOPOLOGY_SHIFT_BITS) & Self::PRIMITIVE_TOPOLOGY_MASK_BITS;
match primitive_topology_bits {
x if x == PrimitiveTopology::PointList as u32 => PrimitiveTopology::PointList,
x if x == PrimitiveTopology::LineList as u32 => PrimitiveTopology::LineList,
x if x == PrimitiveTopology::LineStrip as u32 => PrimitiveTopology::LineStrip,
x if x == PrimitiveTopology::TriangleList as u32 => PrimitiveTopology::TriangleList,
x if x == PrimitiveTopology::TriangleStrip as u32 => PrimitiveTopology::TriangleStrip,
_ => PrimitiveTopology::default(),
}
}
}
impl SpecializedPipeline for MeshPipeline {
type Key = MeshPipelineKey;
fn specialize(&self, key: Self::Key) -> RenderPipelineDescriptor {
let (vertex_array_stride, vertex_attributes) =
if key.contains(MeshPipelineKey::VERTEX_TANGENTS) {
(
48,
vec![
// Position (GOTCHA! Vertex_Position isn't first in the buffer due to how Mesh sorts attributes (alphabetically))
VertexAttribute {
format: VertexFormat::Float32x3,
offset: 12,
shader_location: 0,
},
// Normal
VertexAttribute {
format: VertexFormat::Float32x3,
offset: 0,
shader_location: 1,
},
// Uv (GOTCHA! uv is no longer third in the buffer due to how Mesh sorts attributes (alphabetically))
VertexAttribute {
format: VertexFormat::Float32x2,
offset: 40,
shader_location: 2,
},
// Tangent
VertexAttribute {
format: VertexFormat::Float32x4,
offset: 24,
shader_location: 3,
},
],
)
} else {
(
32,
vec![
// Position (GOTCHA! Vertex_Position isn't first in the buffer due to how Mesh sorts attributes (alphabetically))
VertexAttribute {
format: VertexFormat::Float32x3,
offset: 12,
shader_location: 0,
},
// Normal
VertexAttribute {
format: VertexFormat::Float32x3,
offset: 0,
shader_location: 1,
},
// Uv
VertexAttribute {
format: VertexFormat::Float32x2,
offset: 24,
shader_location: 2,
},
],
)
};
let mut shader_defs = Vec::new();
if key.contains(MeshPipelineKey::VERTEX_TANGENTS) {
shader_defs.push(String::from("VERTEX_TANGENTS"));
}
let (label, blend, depth_write_enabled);
if key.contains(MeshPipelineKey::TRANSPARENT_MAIN_PASS) {
label = "transparent_mesh_pipeline".into();
blend = Some(BlendState::ALPHA_BLENDING);
// For the transparent pass, fragments that are closer will be alpha blended
// but their depth is not written to the depth buffer
depth_write_enabled = false;
} else {
label = "opaque_mesh_pipeline".into();
blend = Some(BlendState::REPLACE);
// For the opaque and alpha mask passes, fragments that are closer will replace
// the current fragment value in the output and the depth is written to the
// depth buffer
depth_write_enabled = true;
}
#[cfg(feature = "webgl")]
shader_defs.push(String::from("NO_ARRAY_TEXTURES_SUPPORT"));
RenderPipelineDescriptor {
vertex: VertexState {
shader: MESH_SHADER_HANDLE.typed::<Shader>(),
entry_point: "vertex".into(),
shader_defs: shader_defs.clone(),
buffers: vec![VertexBufferLayout {
array_stride: vertex_array_stride,
step_mode: VertexStepMode::Vertex,
attributes: vertex_attributes,
}],
},
fragment: Some(FragmentState {
shader: MESH_SHADER_HANDLE.typed::<Shader>(),
shader_defs,
entry_point: "fragment".into(),
targets: vec![ColorTargetState {
format: TextureFormat::bevy_default(),
blend,
write_mask: ColorWrites::ALL,
}],
}),
layout: Some(vec![self.view_layout.clone(), self.mesh_layout.clone()]),
primitive: PrimitiveState {
front_face: FrontFace::Ccw,
cull_mode: Some(Face::Back),
unclipped_depth: false,
polygon_mode: PolygonMode::Fill,
conservative: false,
topology: key.primitive_topology(),
strip_index_format: None,
},
depth_stencil: Some(DepthStencilState {
format: TextureFormat::Depth32Float,
depth_write_enabled,
depth_compare: CompareFunction::Greater,
stencil: StencilState {
front: StencilFaceState::IGNORE,
back: StencilFaceState::IGNORE,
read_mask: 0,
write_mask: 0,
},
bias: DepthBiasState {
constant: 0,
slope_scale: 0.0,
clamp: 0.0,
},
}),
multisample: MultisampleState {
count: key.msaa_samples(),
mask: !0,
alpha_to_coverage_enabled: false,
},
label: Some(label),
}
}
}
pub struct MeshBindGroup {
pub value: BindGroup,
}
pub fn queue_mesh_bind_group(
mut commands: Commands,
mesh_pipeline: Res<MeshPipeline>,
render_device: Res<RenderDevice>,
mesh_uniforms: Res<ComponentUniforms<MeshUniform>>,
) {
if let Some(binding) = mesh_uniforms.uniforms().binding() {
commands.insert_resource(MeshBindGroup {
value: render_device.create_bind_group(&BindGroupDescriptor {
entries: &[BindGroupEntry {
binding: 0,
resource: binding,
}],
label: Some("mesh_bind_group"),
layout: &mesh_pipeline.mesh_layout,
}),
});
}
}
#[derive(Component)]
pub struct MeshViewBindGroup {
pub value: BindGroup,
}
#[allow(clippy::too_many_arguments)]
pub fn queue_mesh_view_bind_groups(
mut commands: Commands,
render_device: Res<RenderDevice>,
mesh_pipeline: Res<MeshPipeline>,
shadow_pipeline: Res<ShadowPipeline>,
light_meta: Res<LightMeta>,
global_light_meta: Res<GlobalLightMeta>,
view_uniforms: Res<ViewUniforms>,
views: Query<(Entity, &ViewShadowBindings, &ViewClusterBindings)>,
) {
if let (Some(view_binding), Some(light_binding), Some(point_light_binding)) = (
view_uniforms.uniforms.binding(),
light_meta.view_gpu_lights.binding(),
global_light_meta.gpu_point_lights.binding(),
) {
for (entity, view_shadow_bindings, view_cluster_bindings) in views.iter() {
let view_bind_group = render_device.create_bind_group(&BindGroupDescriptor {
entries: &[
BindGroupEntry {
binding: 0,
resource: view_binding.clone(),
},
BindGroupEntry {
binding: 1,
resource: light_binding.clone(),
},
BindGroupEntry {
binding: 2,
resource: BindingResource::TextureView(
&view_shadow_bindings.point_light_depth_texture_view,
),
},
BindGroupEntry {
binding: 3,
resource: BindingResource::Sampler(&shadow_pipeline.point_light_sampler),
},
BindGroupEntry {
binding: 4,
resource: BindingResource::TextureView(
&view_shadow_bindings.directional_light_depth_texture_view,
),
},
BindGroupEntry {
binding: 5,
resource: BindingResource::Sampler(
&shadow_pipeline.directional_light_sampler,
),
},
BindGroupEntry {
binding: 6,
resource: point_light_binding.clone(),
},
BindGroupEntry {
binding: 7,
resource: view_cluster_bindings
.cluster_light_index_lists
.binding()
.unwrap(),
},
BindGroupEntry {
binding: 8,
resource: view_cluster_bindings
.cluster_offsets_and_counts
.binding()
.unwrap(),
},
],
label: Some("mesh_view_bind_group"),
layout: &mesh_pipeline.view_layout,
});
commands.entity(entity).insert(MeshViewBindGroup {
value: view_bind_group,
});
}
}
}
pub struct SetMeshViewBindGroup<const I: usize>;
impl<const I: usize> EntityRenderCommand for SetMeshViewBindGroup<I> {
type Param = SQuery<(
Read<ViewUniformOffset>,
Read<ViewLightsUniformOffset>,
Read<MeshViewBindGroup>,
)>;
#[inline]
fn render<'w>(
view: Entity,
_item: Entity,
view_query: SystemParamItem<'w, '_, Self::Param>,
pass: &mut TrackedRenderPass<'w>,
) -> RenderCommandResult {
let (view_uniform, view_lights, mesh_view_bind_group) = view_query.get(view).unwrap();
pass.set_bind_group(
I,
&mesh_view_bind_group.value,
&[view_uniform.offset, view_lights.offset],
);
RenderCommandResult::Success
}
}
pub struct SetMeshBindGroup<const I: usize>;
impl<const I: usize> EntityRenderCommand for SetMeshBindGroup<I> {
type Param = (
SRes<MeshBindGroup>,
SQuery<Read<DynamicUniformIndex<MeshUniform>>>,
);
#[inline]
fn render<'w>(
_view: Entity,
item: Entity,
(mesh_bind_group, mesh_query): SystemParamItem<'w, '_, Self::Param>,
pass: &mut TrackedRenderPass<'w>,
) -> RenderCommandResult {
let mesh_index = mesh_query.get(item).unwrap();
pass.set_bind_group(
I,
&mesh_bind_group.into_inner().value,
&[mesh_index.index()],
);
RenderCommandResult::Success
}
}
pub struct DrawMesh;
impl EntityRenderCommand for DrawMesh {
type Param = (SRes<RenderAssets<Mesh>>, SQuery<Read<Handle<Mesh>>>);
#[inline]
fn render<'w>(
_view: Entity,
item: Entity,
(meshes, mesh_query): SystemParamItem<'w, '_, Self::Param>,
pass: &mut TrackedRenderPass<'w>,
) -> RenderCommandResult {
let mesh_handle = mesh_query.get(item).unwrap();
if let Some(gpu_mesh) = meshes.into_inner().get(mesh_handle) {
pass.set_vertex_buffer(0, gpu_mesh.vertex_buffer.slice(..));
match &gpu_mesh.buffer_info {
GpuBufferInfo::Indexed {
buffer,
index_format,
count,
} => {
pass.set_index_buffer(buffer.slice(..), 0, *index_format);
pass.draw_indexed(0..*count, 0, 0..1);
}
GpuBufferInfo::NonIndexed { vertex_count } => {
pass.draw(0..*vertex_count, 0..1);
}
}
RenderCommandResult::Success
} else {
RenderCommandResult::Failure
}
}
}
#[cfg(test)]
mod tests {
use super::MeshPipelineKey;
#[test]
fn mesh_key_msaa_samples() {
for i in 1..=64 {
assert_eq!(MeshPipelineKey::from_msaa_samples(i).msaa_samples(), i);
}
}
}
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