f18f28874a
# Objective - Better consistency with `add_systems`. - Deprecating `add_plugin` in favor of a more powerful `add_plugins`. - Allow passing `Plugin` to `add_plugins`. - Allow passing tuples to `add_plugins`. ## Solution - `App::add_plugins` now takes an `impl Plugins` parameter. - `App::add_plugin` is deprecated. - `Plugins` is a new sealed trait that is only implemented for `Plugin`, `PluginGroup` and tuples over `Plugins`. - All examples, benchmarks and tests are changed to use `add_plugins`, using tuples where appropriate. --- ## Changelog ### Changed - `App::add_plugins` now accepts all types that implement `Plugins`, which is implemented for: - Types that implement `Plugin`. - Types that implement `PluginGroup`. - Tuples (up to 16 elements) over types that implement `Plugins`. - Deprecated `App::add_plugin` in favor of `App::add_plugins`. ## Migration Guide - Replace `app.add_plugin(plugin)` calls with `app.add_plugins(plugin)`. --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com>
88 lines
2.7 KiB
Rust
88 lines
2.7 KiB
Rust
//! A shader that reads a mesh's custom vertex attribute.
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use bevy::{
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pbr::{MaterialPipeline, MaterialPipelineKey},
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prelude::*,
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reflect::{TypePath, TypeUuid},
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render::{
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mesh::{MeshVertexAttribute, MeshVertexBufferLayout},
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render_resource::{
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AsBindGroup, RenderPipelineDescriptor, ShaderRef, SpecializedMeshPipelineError,
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VertexFormat,
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},
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},
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};
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fn main() {
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App::new()
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.add_plugins((DefaultPlugins, MaterialPlugin::<CustomMaterial>::default()))
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.add_systems(Startup, setup)
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.run();
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}
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// A "high" random id should be used for custom attributes to ensure consistent sorting and avoid collisions with other attributes.
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// See the MeshVertexAttribute docs for more info.
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const ATTRIBUTE_BLEND_COLOR: MeshVertexAttribute =
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MeshVertexAttribute::new("BlendColor", 988540917, VertexFormat::Float32x4);
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/// set up a simple 3D scene
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fn setup(
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mut commands: Commands,
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mut meshes: ResMut<Assets<Mesh>>,
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mut materials: ResMut<Assets<CustomMaterial>>,
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) {
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let mut mesh = Mesh::from(shape::Cube { size: 1.0 });
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mesh.insert_attribute(
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ATTRIBUTE_BLEND_COLOR,
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// The cube mesh has 24 vertices (6 faces, 4 vertices per face), so we insert one BlendColor for each
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vec![[1.0, 0.0, 0.0, 1.0]; 24],
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);
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// cube
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commands.spawn(MaterialMeshBundle {
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mesh: meshes.add(mesh),
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transform: Transform::from_xyz(0.0, 0.5, 0.0),
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material: materials.add(CustomMaterial {
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color: Color::WHITE,
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}),
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..default()
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});
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// camera
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commands.spawn(Camera3dBundle {
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transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
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..default()
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});
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}
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// This is the struct that will be passed to your shader
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#[derive(AsBindGroup, Debug, Clone, TypeUuid, TypePath)]
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#[uuid = "f690fdae-d598-45ab-8225-97e2a3f056e0"]
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pub struct CustomMaterial {
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#[uniform(0)]
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color: Color,
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}
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impl Material for CustomMaterial {
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fn vertex_shader() -> ShaderRef {
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"shaders/custom_vertex_attribute.wgsl".into()
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}
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fn fragment_shader() -> ShaderRef {
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"shaders/custom_vertex_attribute.wgsl".into()
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}
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fn specialize(
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_pipeline: &MaterialPipeline<Self>,
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descriptor: &mut RenderPipelineDescriptor,
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layout: &MeshVertexBufferLayout,
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_key: MaterialPipelineKey<Self>,
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) -> Result<(), SpecializedMeshPipelineError> {
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let vertex_layout = layout.get_layout(&[
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Mesh::ATTRIBUTE_POSITION.at_shader_location(0),
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ATTRIBUTE_BLEND_COLOR.at_shader_location(1),
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])?;
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descriptor.vertex.buffers = vec![vertex_layout];
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Ok(())
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}
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}
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