25bfa80e60
# Objective Yet another PR for migrating stuff to required components. This time, cameras! ## Solution As per the [selected proposal](https://hackmd.io/tsYID4CGRiWxzsgawzxG_g#Combined-Proposal-1-Selected), deprecate `Camera2dBundle` and `Camera3dBundle` in favor of `Camera2d` and `Camera3d`. Adding a `Camera` without `Camera2d` or `Camera3d` now logs a warning, as suggested by Cart [on Discord](https://discord.com/channels/691052431525675048/1264881140007702558/1291506402832945273). I would personally like cameras to work a bit differently and be split into a few more components, to avoid some footguns and confusing semantics, but that is more controversial, and shouldn't block this core migration. ## Testing I ran a few 2D and 3D examples, and tried cameras with and without render graphs. --- ## Migration Guide `Camera2dBundle` and `Camera3dBundle` have been deprecated in favor of `Camera2d` and `Camera3d`. Inserting them will now also insert the other components required by them automatically.
89 lines
2.9 KiB
Rust
89 lines
2.9 KiB
Rust
//! Demonstrates using a custom extension to the `StandardMaterial` to modify the results of the builtin pbr shader.
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use bevy::{
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color::palettes::basic::RED,
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pbr::{ExtendedMaterial, MaterialExtension, OpaqueRendererMethod},
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prelude::*,
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render::render_resource::*,
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};
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/// This example uses a shader source file from the assets subdirectory
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const SHADER_ASSET_PATH: &str = "shaders/extended_material.wgsl";
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_plugins(MaterialPlugin::<
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ExtendedMaterial<StandardMaterial, MyExtension>,
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>::default())
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.add_systems(Startup, setup)
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.add_systems(Update, rotate_things)
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.run();
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}
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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<ExtendedMaterial<StandardMaterial, MyExtension>>>,
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) {
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// sphere
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commands.spawn((
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Mesh3d(meshes.add(Sphere::new(1.0))),
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MeshMaterial3d(materials.add(ExtendedMaterial {
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base: StandardMaterial {
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base_color: RED.into(),
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// can be used in forward or deferred mode.
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opaque_render_method: OpaqueRendererMethod::Auto,
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// in deferred mode, only the PbrInput can be modified (uvs, color and other material properties),
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// in forward mode, the output can also be modified after lighting is applied.
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// see the fragment shader `extended_material.wgsl` for more info.
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// Note: to run in deferred mode, you must also add a `DeferredPrepass` component to the camera and either
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// change the above to `OpaqueRendererMethod::Deferred` or add the `DefaultOpaqueRendererMethod` resource.
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..Default::default()
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},
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extension: MyExtension { quantize_steps: 3 },
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})),
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Transform::from_xyz(0.0, 0.5, 0.0),
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));
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// light
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commands.spawn((
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DirectionalLight::default(),
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Transform::from_xyz(1.0, 1.0, 1.0).looking_at(Vec3::ZERO, Vec3::Y),
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Rotate,
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));
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// camera
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commands.spawn((
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Camera3d::default(),
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Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
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));
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}
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#[derive(Component)]
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struct Rotate;
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fn rotate_things(mut q: Query<&mut Transform, With<Rotate>>, time: Res<Time>) {
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for mut t in &mut q {
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t.rotate_y(time.delta_seconds());
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}
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}
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#[derive(Asset, AsBindGroup, Reflect, Debug, Clone)]
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struct MyExtension {
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// We need to ensure that the bindings of the base material and the extension do not conflict,
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// so we start from binding slot 100, leaving slots 0-99 for the base material.
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#[uniform(100)]
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quantize_steps: u32,
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}
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impl MaterialExtension for MyExtension {
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fn fragment_shader() -> ShaderRef {
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SHADER_ASSET_PATH.into()
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}
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fn deferred_fragment_shader() -> ShaderRef {
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SHADER_ASSET_PATH.into()
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}
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}
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