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https://github.com/bevyengine/bevy
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435d9bc02c
The examples won't work when copy-pasted to another project, without also copying their shader files. This change adds constants at the top of the files to bring attention to the dependencies. Follow up to [#13624](https://github.com/bevyengine/bevy/pull/13624#issuecomment-2143872791)
61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
//! A shader and a material that uses it.
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use bevy::{
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prelude::*,
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reflect::TypePath,
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render::render_resource::{AsBindGroup, ShaderRef},
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sprite::{Material2d, Material2dPlugin, MaterialMesh2dBundle},
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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/custom_material_2d.wgsl";
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fn main() {
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App::new()
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.add_plugins((
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DefaultPlugins,
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Material2dPlugin::<CustomMaterial>::default(),
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))
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.add_systems(Startup, setup)
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.run();
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}
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// Setup a simple 2d 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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asset_server: Res<AssetServer>,
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) {
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// camera
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commands.spawn(Camera2dBundle::default());
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// quad
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commands.spawn(MaterialMesh2dBundle {
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mesh: meshes.add(Rectangle::default()).into(),
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transform: Transform::default().with_scale(Vec3::splat(128.)),
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material: materials.add(CustomMaterial {
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color: LinearRgba::BLUE,
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color_texture: Some(asset_server.load("branding/icon.png")),
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}),
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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(Asset, TypePath, AsBindGroup, Debug, Clone)]
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struct CustomMaterial {
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#[uniform(0)]
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color: LinearRgba,
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#[texture(1)]
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#[sampler(2)]
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color_texture: Option<Handle<Image>>,
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}
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/// The Material2d trait is very configurable, but comes with sensible defaults for all methods.
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/// You only need to implement functions for features that need non-default behavior. See the Material2d api docs for details!
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impl Material2d for CustomMaterial {
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fn fragment_shader() -> ShaderRef {
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SHADER_ASSET_PATH.into()
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}
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}
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