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Add Animated Material example (#11524)
# Objective - Fixes #11516 ## Solution - Add Animated Material example (colors are hue-cycling smoothly per-mesh) ![image](https://github.com/bevyengine/bevy/assets/11307157/c75b9e66-0019-41b8-85ec-647559c6ba01) Note: this example reproduces the perf issue found in #10610 pretty consistently, with and without the changes from that PR included. Frame time is sometimes around 4.3ms, other times around 12-14ms. Its pretty random per run. I think this clears #10610 for merge.
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11
Cargo.toml
11
Cargo.toml
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@ -552,6 +552,17 @@ description = "Demonstrates how to use the `Camera::viewport_to_world` method"
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category = "3D Rendering"
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category = "3D Rendering"
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wasm = true
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wasm = true
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[[example]]
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name = "animated_material"
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path = "examples/3d/animated_material.rs"
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doc-scrape-examples = true
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[package.metadata.example.animated_material]
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name = "Animated Material"
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description = "Shows how to animate material properties"
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category = "3D Rendering"
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wasm = true
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[[example]]
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[[example]]
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name = "generate_custom_mesh"
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name = "generate_custom_mesh"
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path = "examples/3d/generate_custom_mesh.rs"
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path = "examples/3d/generate_custom_mesh.rs"
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78
examples/3d/animated_material.rs
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78
examples/3d/animated_material.rs
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@ -0,0 +1,78 @@
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//! Shows how to animate material properties
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use bevy::prelude::*;
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use bevy::utils::HashSet;
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_systems(Startup, setup)
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.add_systems(Update, (animate_materials, make_materials_unique))
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.run();
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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commands.spawn((
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Camera3dBundle {
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transform: Transform::from_xyz(3.0, 1.0, 3.0)
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.looking_at(Vec3::new(0.0, -0.5, 0.0), Vec3::Y),
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..default()
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},
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EnvironmentMapLight {
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diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
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specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
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intensity: 1500.0,
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},
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));
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let helmet = asset_server.load("models/FlightHelmet/FlightHelmet.gltf#Scene0");
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for x in -2..3 {
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for z in -2..3 {
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commands.spawn(SceneBundle {
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scene: helmet.clone(),
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transform: Transform::from_translation(Vec3::new(x as f32, 0.0, z as f32)),
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..default()
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});
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}
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}
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}
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fn animate_materials(
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material_handles: Query<&Handle<StandardMaterial>>,
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time: Res<Time>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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) {
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for (i, material_handle) in material_handles.iter().enumerate() {
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if let Some(material) = materials.get_mut(material_handle) {
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let color = Color::hsl(
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((i as f32 * 2.345 + time.elapsed_seconds_wrapped()) * 100.0) % 360.0,
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1.0,
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0.5,
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);
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material.base_color = color;
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material.emissive = color;
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}
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}
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}
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/// This is needed because by default assets are loaded with shared materials
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/// But we want to animate every helmet independently of the others, so we must duplicate the materials
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fn make_materials_unique(
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mut material_handles: Query<&mut Handle<StandardMaterial>>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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mut ran: Local<bool>,
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) {
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if *ran {
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return;
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}
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let mut set = HashSet::new();
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for mut material_handle in material_handles.iter_mut() {
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if set.contains(&material_handle.id()) {
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let material = materials.get(&*material_handle).unwrap().clone();
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*material_handle = materials.add(material);
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} else {
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set.insert(material_handle.id());
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}
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*ran = true;
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}
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}
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@ -121,6 +121,7 @@ Example | Description
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[3D Scene](../examples/3d/3d_scene.rs) | Simple 3D scene with basic shapes and lighting
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[3D Scene](../examples/3d/3d_scene.rs) | Simple 3D scene with basic shapes and lighting
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[3D Shapes](../examples/3d/3d_shapes.rs) | A scene showcasing the built-in 3D shapes
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[3D Shapes](../examples/3d/3d_shapes.rs) | A scene showcasing the built-in 3D shapes
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[3D Viewport To World](../examples/3d/3d_viewport_to_world.rs) | Demonstrates how to use the `Camera::viewport_to_world` method
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[3D Viewport To World](../examples/3d/3d_viewport_to_world.rs) | Demonstrates how to use the `Camera::viewport_to_world` method
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[Animated Material](../examples/3d/animated_material.rs) | Shows how to animate material properties
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[Anti-aliasing](../examples/3d/anti_aliasing.rs) | Compares different anti-aliasing methods
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[Anti-aliasing](../examples/3d/anti_aliasing.rs) | Compares different anti-aliasing methods
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[Atmospheric Fog](../examples/3d/atmospheric_fog.rs) | A scene showcasing the atmospheric fog effect
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[Atmospheric Fog](../examples/3d/atmospheric_fog.rs) | A scene showcasing the atmospheric fog effect
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[Blend Modes](../examples/3d/blend_modes.rs) | Showcases different blend modes
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[Blend Modes](../examples/3d/blend_modes.rs) | Showcases different blend modes
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