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https://github.com/bevyengine/bevy
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938d810766
# Objective Fixes #14782 ## Solution Enable the lint and fix all upcoming hints (`--fix`). Also tried to figure out the false-positive (see review comment). Maybe split this PR up into multiple parts where only the last one enables the lint, so some can already be merged resulting in less many files touched / less potential for merge conflicts? Currently, there are some cases where it might be easier to read the code with the qualifier, so perhaps remove the import of it and adapt its cases? In the current stage it's just a plain adoption of the suggestions in order to have a base to discuss. ## Testing `cargo clippy` and `cargo run -p ci` are happy.
705 lines
21 KiB
Rust
705 lines
21 KiB
Rust
//! This example shows how to sample random points from primitive shapes.
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use std::f32::consts::PI;
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use bevy::{
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core_pipeline::{bloom::BloomSettings, tonemapping::Tonemapping},
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input::mouse::{AccumulatedMouseMotion, AccumulatedMouseScroll, MouseButtonInput},
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math::prelude::*,
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prelude::*,
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};
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use rand::seq::SliceRandom;
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use rand::{Rng, SeedableRng};
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use rand_chacha::ChaCha8Rng;
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.insert_resource(SampledShapes::new())
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.add_systems(Startup, setup)
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.add_systems(
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Update,
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(
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handle_mouse,
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handle_keypress,
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spawn_points,
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despawn_points,
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animate_spawning,
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animate_despawning,
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update_camera,
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update_lights,
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),
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)
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.run();
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}
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// Constants
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/// Maximum distance of the camera from its target. (meters)
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/// Should be set such that it is possible to look at all objects
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const MAX_CAMERA_DISTANCE: f32 = 12.0;
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/// Minimum distance of the camera from its target. (meters)
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/// Should be set such that it is not possible to clip into objects
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const MIN_CAMERA_DISTANCE: f32 = 1.0;
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/// Offset to be placed between the shapes
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const DISTANCE_BETWEEN_SHAPES: Vec3 = Vec3::new(2.0, 0.0, 0.0);
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/// Maximum amount of points allowed to be present.
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/// Should be set such that it does not cause large amounts of lag when reached.
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const MAX_POINTS: usize = 3000; // TODO: Test wasm and add a wasm-specific-bound
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/// How many points should be spawned each frame
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const POINTS_PER_FRAME: usize = 3;
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/// Color used for the inside points
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const INSIDE_POINT_COLOR: LinearRgba = LinearRgba::rgb(0.855, 1.1, 0.01);
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/// Color used for the points on the boundary
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const BOUNDARY_POINT_COLOR: LinearRgba = LinearRgba::rgb(0.08, 0.2, 0.90);
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/// Time (in seconds) for the spawning/despawning animation
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const ANIMATION_TIME: f32 = 1.0;
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/// Color for the sky and the sky-light
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const SKY_COLOR: Color = Color::srgb(0.02, 0.06, 0.15);
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const SMALL_3D: f32 = 0.5;
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const BIG_3D: f32 = 1.0;
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// primitives
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const CUBOID: Cuboid = Cuboid {
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half_size: Vec3::new(SMALL_3D, BIG_3D, SMALL_3D),
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};
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const SPHERE: Sphere = Sphere {
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radius: 1.5 * SMALL_3D,
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};
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const TRIANGLE_3D: Triangle3d = Triangle3d {
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vertices: [
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Vec3::new(BIG_3D, -BIG_3D * 0.5, 0.0),
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Vec3::new(0.0, BIG_3D, 0.0),
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Vec3::new(-BIG_3D, -BIG_3D * 0.5, 0.0),
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],
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};
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const CAPSULE_3D: Capsule3d = Capsule3d {
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radius: SMALL_3D,
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half_length: SMALL_3D,
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};
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const CYLINDER: Cylinder = Cylinder {
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radius: SMALL_3D,
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half_height: SMALL_3D,
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};
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const TETRAHEDRON: Tetrahedron = Tetrahedron {
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vertices: [
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Vec3::new(-BIG_3D, -BIG_3D * 0.67, BIG_3D * 0.5),
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Vec3::new(BIG_3D, -BIG_3D * 0.67, BIG_3D * 0.5),
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Vec3::new(0.0, -BIG_3D * 0.67, -BIG_3D * 1.17),
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Vec3::new(0.0, BIG_3D, 0.0),
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],
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};
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// Components, Resources
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/// Resource for the random sampling mode, telling whether to sample the interior or the boundary.
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#[derive(Resource)]
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enum SamplingMode {
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Interior,
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Boundary,
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}
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/// Resource for storing whether points should spawn by themselves
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#[derive(Resource)]
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enum SpawningMode {
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Manual,
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Automatic,
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}
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/// Resource for tracking how many points should be spawned
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#[derive(Resource)]
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struct SpawnQueue(usize);
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#[derive(Resource)]
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struct PointCounter(usize);
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/// Resource storing the shapes being sampled and their translations.
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#[derive(Resource)]
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struct SampledShapes(Vec<(Shape, Vec3)>);
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impl SampledShapes {
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fn new() -> Self {
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let shapes = Shape::list_all_shapes();
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let n_shapes = shapes.len();
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let translations =
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(0..n_shapes).map(|i| (i as f32 - n_shapes as f32 / 2.0) * DISTANCE_BETWEEN_SHAPES);
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SampledShapes(shapes.into_iter().zip(translations).collect())
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}
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}
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/// Enum listing the shapes that can be sampled
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#[derive(Clone, Copy)]
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enum Shape {
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Cuboid,
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Sphere,
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Capsule,
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Cylinder,
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Tetrahedron,
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Triangle,
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}
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struct ShapeMeshBuilder {
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shape: Shape,
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}
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impl Shape {
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/// Return a vector containing all implemented shapes
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fn list_all_shapes() -> Vec<Shape> {
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vec![
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Shape::Cuboid,
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Shape::Sphere,
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Shape::Capsule,
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Shape::Cylinder,
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Shape::Tetrahedron,
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Shape::Triangle,
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]
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}
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}
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impl ShapeSample for Shape {
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type Output = Vec3;
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fn sample_interior<R: Rng + ?Sized>(&self, rng: &mut R) -> Vec3 {
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match self {
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Shape::Cuboid => CUBOID.sample_interior(rng),
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Shape::Sphere => SPHERE.sample_interior(rng),
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Shape::Capsule => CAPSULE_3D.sample_interior(rng),
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Shape::Cylinder => CYLINDER.sample_interior(rng),
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Shape::Tetrahedron => TETRAHEDRON.sample_interior(rng),
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Shape::Triangle => TRIANGLE_3D.sample_interior(rng),
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}
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}
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fn sample_boundary<R: Rng + ?Sized>(&self, rng: &mut R) -> Self::Output {
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match self {
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Shape::Cuboid => CUBOID.sample_boundary(rng),
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Shape::Sphere => SPHERE.sample_boundary(rng),
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Shape::Capsule => CAPSULE_3D.sample_boundary(rng),
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Shape::Cylinder => CYLINDER.sample_boundary(rng),
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Shape::Tetrahedron => TETRAHEDRON.sample_boundary(rng),
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Shape::Triangle => TRIANGLE_3D.sample_boundary(rng),
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}
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}
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}
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impl Meshable for Shape {
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type Output = ShapeMeshBuilder;
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fn mesh(&self) -> Self::Output {
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ShapeMeshBuilder { shape: *self }
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}
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}
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impl MeshBuilder for ShapeMeshBuilder {
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fn build(&self) -> Mesh {
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match self.shape {
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Shape::Cuboid => CUBOID.mesh().into(),
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Shape::Sphere => SPHERE.mesh().into(),
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Shape::Capsule => CAPSULE_3D.mesh().into(),
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Shape::Cylinder => CYLINDER.mesh().into(),
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Shape::Tetrahedron => TETRAHEDRON.mesh().into(),
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Shape::Triangle => TRIANGLE_3D.mesh().into(),
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}
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}
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}
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/// The source of randomness used by this example.
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#[derive(Resource)]
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struct RandomSource(ChaCha8Rng);
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/// A container for the handle storing the mesh used to display sampled points as spheres.
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#[derive(Resource)]
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struct PointMesh(Handle<Mesh>);
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/// A container for the handle storing the material used to display sampled points.
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#[derive(Resource)]
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struct PointMaterial {
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interior: Handle<StandardMaterial>,
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boundary: Handle<StandardMaterial>,
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}
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/// Marker component for sampled points.
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#[derive(Component)]
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struct SamplePoint;
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/// Component for animating the spawn animation of lights.
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#[derive(Component)]
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struct SpawningPoint {
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progress: f32,
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}
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/// Marker component for lights which should change intensity.
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#[derive(Component)]
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struct DespawningPoint {
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progress: f32,
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}
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/// Marker component for lights which should change intensity.
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#[derive(Component)]
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struct FireflyLights;
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/// The pressed state of the mouse, used for camera motion.
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#[derive(Resource)]
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struct MousePressed(bool);
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/// Camera movement component.
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#[derive(Component)]
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struct CameraRig {
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/// Rotation around the vertical axis of the camera (radians).
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/// Positive changes makes the camera look more from the right.
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pub yaw: f32,
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/// Rotation around the horizontal axis of the camera (radians) (-pi/2; pi/2).
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/// Positive looks down from above.
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pub pitch: f32,
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/// Distance from the center, smaller distance causes more zoom.
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pub distance: f32,
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/// Location in 3D space at which the camera is looking and around which it is orbiting.
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pub target: Vec3,
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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<StandardMaterial>>,
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shapes: Res<SampledShapes>,
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) {
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// Use seeded rng and store it in a resource; this makes the random output reproducible.
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let seeded_rng = ChaCha8Rng::seed_from_u64(4); // Chosen by a fair die roll, guaranteed to be random.
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commands.insert_resource(RandomSource(seeded_rng));
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// Make a plane for establishing space.
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commands.spawn(PbrBundle {
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mesh: meshes.add(Plane3d::default().mesh().size(20.0, 20.0)),
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material: materials.add(StandardMaterial {
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base_color: Color::srgb(0.3, 0.5, 0.3),
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perceptual_roughness: 0.95,
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metallic: 0.0,
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..default()
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}),
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transform: Transform::from_xyz(0.0, -2.5, 0.0),
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..default()
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});
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let shape_material = materials.add(StandardMaterial {
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base_color: Color::srgba(0.2, 0.1, 0.6, 0.3),
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reflectance: 0.0,
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alpha_mode: AlphaMode::Blend,
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cull_mode: None,
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..default()
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});
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// Spawn shapes to be sampled
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for (shape, translation) in shapes.0.iter() {
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// The sampled shape shown transparently:
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commands.spawn(PbrBundle {
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mesh: meshes.add(shape.mesh()),
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material: shape_material.clone(),
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transform: Transform::from_translation(*translation),
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..default()
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});
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// Lights which work as the bulk lighting of the fireflies:
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commands.spawn((
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PointLightBundle {
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point_light: PointLight {
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range: 4.0,
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radius: 0.6,
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intensity: 1.0,
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shadows_enabled: false,
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color: Color::LinearRgba(INSIDE_POINT_COLOR),
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..default()
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},
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transform: Transform::from_translation(*translation),
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..default()
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},
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FireflyLights,
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));
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}
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// Global light:
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commands.spawn(PointLightBundle {
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point_light: PointLight {
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color: SKY_COLOR,
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intensity: 2_000.0,
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shadows_enabled: false,
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..default()
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},
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transform: Transform::from_xyz(4.0, 8.0, 4.0),
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..default()
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});
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// A camera:
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commands.spawn((
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Camera3dBundle {
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camera: Camera {
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hdr: true, // HDR is required for bloom
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clear_color: ClearColorConfig::Custom(SKY_COLOR),
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..default()
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},
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tonemapping: Tonemapping::TonyMcMapface,
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transform: Transform::from_xyz(-2.0, 3.0, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
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..default()
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},
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BloomSettings::NATURAL,
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CameraRig {
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yaw: 0.56,
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pitch: 0.45,
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distance: 8.0,
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target: Vec3::ZERO,
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},
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));
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// Store the mesh and material for sample points in resources:
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commands.insert_resource(PointMesh(
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meshes.add(Sphere::new(0.03).mesh().ico(1).unwrap()),
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));
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commands.insert_resource(PointMaterial {
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interior: materials.add(StandardMaterial {
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base_color: Color::BLACK,
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reflectance: 0.05,
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emissive: 2.5 * INSIDE_POINT_COLOR,
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..default()
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}),
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boundary: materials.add(StandardMaterial {
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base_color: Color::BLACK,
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reflectance: 0.05,
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emissive: 1.5 * BOUNDARY_POINT_COLOR,
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..default()
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}),
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});
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// Instructions for the example:
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commands.spawn(
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TextBundle::from_section(
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"Controls:\n\
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M: Toggle between sampling boundary and interior.\n\
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A: Toggle automatic spawning & despawning of points.\n\
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R: Restart (erase all samples).\n\
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S: Add one random sample.\n\
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D: Add 100 random samples.\n\
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Rotate camera by holding left mouse and panning.\n\
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Zoom camera by scrolling via mouse or +/-.\n\
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Move camera by L/R arrow keys.\n\
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Tab: Toggle this text",
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TextStyle::default(),
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)
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.with_style(Style {
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position_type: PositionType::Absolute,
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top: Val::Px(12.0),
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left: Val::Px(12.0),
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..default()
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}),
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);
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// No points are scheduled to spawn initially.
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commands.insert_resource(SpawnQueue(0));
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// No points have been spawned initially.
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commands.insert_resource(PointCounter(0));
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// The mode starts with interior points.
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commands.insert_resource(SamplingMode::Interior);
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// Points spawn automatically by default.
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commands.insert_resource(SpawningMode::Automatic);
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// Starting mouse-pressed state is false.
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commands.insert_resource(MousePressed(false));
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}
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// Handle user inputs from the keyboard:
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#[allow(clippy::too_many_arguments)]
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fn handle_keypress(
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mut commands: Commands,
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keyboard: Res<ButtonInput<KeyCode>>,
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mut mode: ResMut<SamplingMode>,
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mut spawn_mode: ResMut<SpawningMode>,
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samples: Query<Entity, With<SamplePoint>>,
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shapes: Res<SampledShapes>,
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mut spawn_queue: ResMut<SpawnQueue>,
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mut counter: ResMut<PointCounter>,
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mut text_menus: Query<&mut Visibility, With<Text>>,
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mut camera: Query<&mut CameraRig>,
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) {
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// R => restart, deleting all samples
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if keyboard.just_pressed(KeyCode::KeyR) {
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// Don't forget to zero out the counter!
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counter.0 = 0;
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for entity in &samples {
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commands.entity(entity).despawn();
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}
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}
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// S => sample once
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if keyboard.just_pressed(KeyCode::KeyS) {
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spawn_queue.0 += 1;
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}
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// D => sample a hundred
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if keyboard.just_pressed(KeyCode::KeyD) {
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spawn_queue.0 += 100;
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}
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// M => toggle mode between interior and boundary.
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if keyboard.just_pressed(KeyCode::KeyM) {
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match *mode {
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SamplingMode::Interior => *mode = SamplingMode::Boundary,
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SamplingMode::Boundary => *mode = SamplingMode::Interior,
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}
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}
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// A => toggle spawning mode between automatic and manual.
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if keyboard.just_pressed(KeyCode::KeyA) {
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match *spawn_mode {
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SpawningMode::Manual => *spawn_mode = SpawningMode::Automatic,
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SpawningMode::Automatic => *spawn_mode = SpawningMode::Manual,
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}
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}
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// Tab => toggle help menu.
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if keyboard.just_pressed(KeyCode::Tab) {
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for mut visibility in text_menus.iter_mut() {
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*visibility = match *visibility {
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Visibility::Hidden => Visibility::Visible,
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_ => Visibility::Hidden,
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};
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}
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}
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let mut camera_rig = camera.single_mut();
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// +/- => zoom camera.
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if keyboard.just_pressed(KeyCode::NumpadSubtract) || keyboard.just_pressed(KeyCode::Minus) {
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camera_rig.distance += MAX_CAMERA_DISTANCE / 15.0;
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camera_rig.distance = camera_rig
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.distance
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.clamp(MIN_CAMERA_DISTANCE, MAX_CAMERA_DISTANCE);
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}
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if keyboard.just_pressed(KeyCode::NumpadAdd) {
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camera_rig.distance -= MAX_CAMERA_DISTANCE / 15.0;
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camera_rig.distance = camera_rig
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.distance
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.clamp(MIN_CAMERA_DISTANCE, MAX_CAMERA_DISTANCE);
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}
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// Arrows => Move camera focus
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let left = keyboard.just_pressed(KeyCode::ArrowLeft);
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let right = keyboard.just_pressed(KeyCode::ArrowRight);
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if left || right {
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let mut closest = 0;
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let mut closest_distance = f32::MAX;
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for (i, (_, position)) in shapes.0.iter().enumerate() {
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let distance = camera_rig.target.distance(*position);
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if distance < closest_distance {
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closest = i;
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closest_distance = distance;
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}
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}
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if closest > 0 && left {
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camera_rig.target = shapes.0[closest - 1].1;
|
|
}
|
|
if closest < shapes.0.len() - 1 && right {
|
|
camera_rig.target = shapes.0[closest + 1].1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Handle user mouse input for panning the camera around:
|
|
fn handle_mouse(
|
|
accumulated_mouse_motion: Res<AccumulatedMouseMotion>,
|
|
accumulated_mouse_scroll: Res<AccumulatedMouseScroll>,
|
|
mut button_events: EventReader<MouseButtonInput>,
|
|
mut camera: Query<&mut CameraRig>,
|
|
mut mouse_pressed: ResMut<MousePressed>,
|
|
) {
|
|
// Store left-pressed state in the MousePressed resource
|
|
for button_event in button_events.read() {
|
|
if button_event.button != MouseButton::Left {
|
|
continue;
|
|
}
|
|
*mouse_pressed = MousePressed(button_event.state.is_pressed());
|
|
}
|
|
|
|
let mut camera_rig = camera.single_mut();
|
|
|
|
if accumulated_mouse_scroll.delta != Vec2::ZERO {
|
|
let mouse_scroll = accumulated_mouse_scroll.delta.y;
|
|
camera_rig.distance -= mouse_scroll / 15.0 * MAX_CAMERA_DISTANCE;
|
|
camera_rig.distance = camera_rig
|
|
.distance
|
|
.clamp(MIN_CAMERA_DISTANCE, MAX_CAMERA_DISTANCE);
|
|
}
|
|
|
|
// If the mouse is not pressed, just ignore motion events
|
|
if !mouse_pressed.0 {
|
|
return;
|
|
}
|
|
if accumulated_mouse_motion.delta != Vec2::ZERO {
|
|
let displacement = accumulated_mouse_motion.delta;
|
|
camera_rig.yaw += displacement.x / 90.;
|
|
camera_rig.pitch += displacement.y / 90.;
|
|
// The extra 0.01 is to disallow weird behaviour at the poles of the rotation
|
|
camera_rig.pitch = camera_rig.pitch.clamp(-PI / 2.01, PI / 2.01);
|
|
}
|
|
}
|
|
|
|
#[allow(clippy::too_many_arguments)]
|
|
fn spawn_points(
|
|
mut commands: Commands,
|
|
mode: ResMut<SamplingMode>,
|
|
shapes: Res<SampledShapes>,
|
|
mut random_source: ResMut<RandomSource>,
|
|
sample_mesh: Res<PointMesh>,
|
|
sample_material: Res<PointMaterial>,
|
|
mut spawn_queue: ResMut<SpawnQueue>,
|
|
mut counter: ResMut<PointCounter>,
|
|
spawn_mode: ResMut<SpawningMode>,
|
|
) {
|
|
if let SpawningMode::Automatic = *spawn_mode {
|
|
spawn_queue.0 += POINTS_PER_FRAME;
|
|
}
|
|
|
|
if spawn_queue.0 == 0 {
|
|
return;
|
|
}
|
|
|
|
let rng = &mut random_source.0;
|
|
|
|
// Don't go crazy
|
|
for _ in 0..1000 {
|
|
if spawn_queue.0 == 0 {
|
|
break;
|
|
}
|
|
spawn_queue.0 -= 1;
|
|
counter.0 += 1;
|
|
|
|
let (shape, offset) = shapes.0.choose(rng).expect("There is at least one shape");
|
|
|
|
// Get a single random Vec3:
|
|
let sample: Vec3 = *offset
|
|
+ match *mode {
|
|
SamplingMode::Interior => shape.sample_interior(rng),
|
|
SamplingMode::Boundary => shape.sample_boundary(rng),
|
|
};
|
|
|
|
// Spawn a sphere at the random location:
|
|
commands.spawn((
|
|
PbrBundle {
|
|
mesh: sample_mesh.0.clone(),
|
|
material: match *mode {
|
|
SamplingMode::Interior => sample_material.interior.clone(),
|
|
SamplingMode::Boundary => sample_material.boundary.clone(),
|
|
},
|
|
transform: Transform::from_translation(sample).with_scale(Vec3::ZERO),
|
|
..default()
|
|
},
|
|
SamplePoint,
|
|
SpawningPoint { progress: 0.0 },
|
|
));
|
|
}
|
|
}
|
|
|
|
fn despawn_points(
|
|
mut commands: Commands,
|
|
samples: Query<Entity, With<SamplePoint>>,
|
|
spawn_mode: Res<SpawningMode>,
|
|
mut counter: ResMut<PointCounter>,
|
|
mut random_source: ResMut<RandomSource>,
|
|
) {
|
|
// Do not despawn automatically in manual mode
|
|
if let SpawningMode::Manual = *spawn_mode {
|
|
return;
|
|
}
|
|
|
|
if counter.0 < MAX_POINTS {
|
|
return;
|
|
}
|
|
|
|
let rng = &mut random_source.0;
|
|
// Skip a random amount of points to ensure random despawning
|
|
let skip = rng.gen_range(0..counter.0);
|
|
let despawn_amount = (counter.0 - MAX_POINTS).min(100);
|
|
counter.0 -= samples
|
|
.iter()
|
|
.skip(skip)
|
|
.take(despawn_amount)
|
|
.map(|entity| {
|
|
commands
|
|
.entity(entity)
|
|
.insert(DespawningPoint { progress: 0.0 })
|
|
.remove::<SpawningPoint>()
|
|
.remove::<SamplePoint>();
|
|
})
|
|
.count();
|
|
}
|
|
|
|
fn animate_spawning(
|
|
mut commands: Commands,
|
|
time: Res<Time>,
|
|
mut samples: Query<(Entity, &mut Transform, &mut SpawningPoint)>,
|
|
) {
|
|
let dt = time.delta_seconds();
|
|
|
|
for (entity, mut transform, mut point) in samples.iter_mut() {
|
|
point.progress += dt / ANIMATION_TIME;
|
|
transform.scale = Vec3::splat(point.progress.min(1.0));
|
|
if point.progress >= 1.0 {
|
|
commands.entity(entity).remove::<SpawningPoint>();
|
|
}
|
|
}
|
|
}
|
|
|
|
fn animate_despawning(
|
|
mut commands: Commands,
|
|
time: Res<Time>,
|
|
mut samples: Query<(Entity, &mut Transform, &mut DespawningPoint)>,
|
|
) {
|
|
let dt = time.delta_seconds();
|
|
|
|
for (entity, mut transform, mut point) in samples.iter_mut() {
|
|
point.progress += dt / ANIMATION_TIME;
|
|
// If the point is already smaller than expected, jump ahead with the despawning progress to avoid sudden jumps in size
|
|
point.progress = f32::max(point.progress, 1.0 - transform.scale.x);
|
|
transform.scale = Vec3::splat((1.0 - point.progress).max(0.0));
|
|
if point.progress >= 1.0 {
|
|
commands.entity(entity).despawn();
|
|
}
|
|
}
|
|
}
|
|
|
|
fn update_camera(mut camera: Query<(&mut Transform, &CameraRig), Changed<CameraRig>>) {
|
|
for (mut transform, rig) in camera.iter_mut() {
|
|
let looking_direction =
|
|
Quat::from_rotation_y(-rig.yaw) * Quat::from_rotation_x(rig.pitch) * Vec3::Z;
|
|
transform.translation = rig.target - rig.distance * looking_direction;
|
|
transform.look_at(rig.target, Dir3::Y);
|
|
}
|
|
}
|
|
|
|
fn update_lights(
|
|
mut lights: Query<&mut PointLight, With<FireflyLights>>,
|
|
counter: Res<PointCounter>,
|
|
) {
|
|
let saturation = (counter.0 as f32 / MAX_POINTS as f32).min(2.0);
|
|
let intensity = 40_000.0 * saturation;
|
|
for mut light in lights.iter_mut() {
|
|
light.intensity = light.intensity.lerp(intensity, 0.04);
|
|
}
|
|
}
|