pub trait Hue: Sized {
// Required methods
fn with_hue(&self, hue: f32) -> Self;
fn hue(&self) -> f32;
fn set_hue(&mut self, hue: f32);
// Provided method
fn rotate_hue(&self, degrees: f32) -> Self { ... }
}Expand description
Trait for manipulating the hue of a color.
Required Methods§
Provided Methods§
Sourcefn rotate_hue(&self, degrees: f32) -> Self
fn rotate_hue(&self, degrees: f32) -> Self
Return a new version of this color with the hue channel rotated by the given degrees.
Examples found in repository?
examples/3d/animated_material.rs (line 42)
13fn setup(
14 mut commands: Commands,
15 asset_server: Res<AssetServer>,
16 mut meshes: ResMut<Assets<Mesh>>,
17 mut materials: ResMut<Assets<StandardMaterial>>,
18) {
19 commands.spawn((
20 Camera3d::default(),
21 Transform::from_xyz(3.0, 1.0, 3.0).looking_at(Vec3::new(0.0, -0.5, 0.0), Vec3::Y),
22 EnvironmentMapLight {
23 diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
24 specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
25 intensity: 2_000.0,
26 ..default()
27 },
28 ));
29
30 let cube = meshes.add(Cuboid::new(0.5, 0.5, 0.5));
31
32 const GOLDEN_ANGLE: f32 = 137.507_77;
33
34 let mut hsla = Hsla::hsl(0.0, 1.0, 0.5);
35 for x in -1..2 {
36 for z in -1..2 {
37 commands.spawn((
38 Mesh3d(cube.clone()),
39 MeshMaterial3d(materials.add(Color::from(hsla))),
40 Transform::from_translation(Vec3::new(x as f32, 0.0, z as f32)),
41 ));
42 hsla = hsla.rotate_hue(GOLDEN_ANGLE);
43 }
44 }
45}
46
47fn animate_materials(
48 material_handles: Query<&MeshMaterial3d<StandardMaterial>>,
49 time: Res<Time>,
50 mut materials: ResMut<Assets<StandardMaterial>>,
51) {
52 for material_handle in material_handles.iter() {
53 if let Some(material) = materials.get_mut(material_handle) {
54 if let Color::Hsla(ref mut hsla) = material.base_color {
55 *hsla = hsla.rotate_hue(time.delta_secs() * 100.0);
56 }
57 }
58 }
59}More examples
examples/3d/query_gltf_primitives.rs (line 31)
16fn find_top_material_and_mesh(
17 mut materials: ResMut<Assets<StandardMaterial>>,
18 mut meshes: ResMut<Assets<Mesh>>,
19 time: Res<Time>,
20 mat_query: Query<(
21 &MeshMaterial3d<StandardMaterial>,
22 &Mesh3d,
23 &GltfMaterialName,
24 )>,
25) {
26 for (mat_handle, mesh_handle, name) in mat_query.iter() {
27 // locate a material by material name
28 if name.0 == "Top" {
29 if let Some(material) = materials.get_mut(mat_handle) {
30 if let Color::Hsla(ref mut hsla) = material.base_color {
31 *hsla = hsla.rotate_hue(time.delta_secs() * 100.0);
32 } else {
33 material.base_color = Color::from(Hsla::hsl(0.0, 0.9, 0.7));
34 }
35 }
36
37 if let Some(mesh) = meshes.get_mut(mesh_handle) {
38 if let Some(VertexAttributeValues::Float32x3(positions)) =
39 mesh.attribute_mut(Mesh::ATTRIBUTE_POSITION)
40 {
41 for position in positions {
42 *position = (
43 position[0],
44 1.5 + 0.5 * ops::sin(time.elapsed_secs() / 2.0),
45 position[2],
46 )
47 .into();
48 }
49 }
50 }
51 }
52 }
53}Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.