Adding rapier for collision detection
Elijah Voigt
4 months ago
parent
1e15c5cfb2
commit
2d5ab5ea31
@ -0,0 +1,138 @@
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use bevy::{color::palettes::css::{BLUE, GREEN}, render::mesh::{SphereKind, SphereMeshBuilder}};
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use bevy_rapier3d::rapier::prelude::CollisionEventFlags;
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use games::*;
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fn main() {
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App::new()
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.add_plugins(BaseGamePlugin)
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.add_systems(Startup, (
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setup_physics_scene,
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position_camera.after(setup_camera)
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).chain())
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.add_systems(Update, (control_ball, read_events))
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.run();
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}
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fn setup_physics_scene(
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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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) {
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// Create the ground.
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// Make this a physical looking object
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commands
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.spawn((
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Collider::cuboid(100.0, 0.1, 100.0),
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Transform::from_xyz(0.0, -2.0, 0.0),
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Mesh3d(meshes.add(Plane3d::new(Vec3::Y, Vec2::splat(50.0)))),
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MeshMaterial3d(materials.add(StandardMaterial {
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base_color: RED.into(),
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..Default::default()
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})),
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));
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commands.spawn((
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SpotLight { color: WHITE.into(), intensity: 10_000_000.0, shadows_enabled: true, ..default() },
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Transform::from_xyz(0.0, 10.0, 10.0).looking_at(Vec3::ZERO, Vec3::Y),
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));
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// Create the bouncing ball.
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commands
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.spawn((
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RigidBody::Dynamic,
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GravityScale(1.0),
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Collider::ball(0.5),
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ColliderMassProperties::Mass(2.0),
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Restitution::coefficient(0.7),
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ExternalImpulse::default(),
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Transform::from_xyz(0.0, 4.0, 0.0),
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Marker,
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ActiveEvents::all(),
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Mesh3d(meshes.add(SphereMeshBuilder::new(
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0.5,
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SphereKind::Uv {
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sectors: 10,
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stacks: 10,
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},
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))),
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MeshMaterial3d(materials.add(StandardMaterial {
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base_color: BLUE.into(),
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..Default::default()
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})),
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));
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// Create a box that the ball can pass into/through
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// TODO: Transparent box to visualize area
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commands
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.spawn((
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Sensor,
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Marker,
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Collider::cuboid(1.0, 1.0, 1.0),
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Transform::from_xyz(0.0, 0.0, 0.0),
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Mesh3d(meshes.add(Cuboid::new(2.0, 2.0, 2.0))),
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MeshMaterial3d(materials.add(StandardMaterial {
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base_color: GREEN.with_alpha(0.5).into(),
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alpha_mode: AlphaMode::Blend,
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..Default::default()
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})),
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));
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}
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/// Position the world camera to get a better view
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fn position_camera(
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mut query: Query<(Entity, &mut Transform), (With<Camera>, With<Camera3d>)>,
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mut commands: Commands,
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) {
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query.iter_mut().for_each(|(e, mut t)| {
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*t = Transform::from_xyz(10.0, 10.0, 10.0)
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.looking_at(Vec3::ZERO, Vec3::Y);
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})
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}
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fn control_ball(
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keys: Res<ButtonInput<KeyCode>>,
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mut ball: Single<&mut ExternalImpulse>,
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) {
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if keys.pressed(KeyCode::ArrowUp) {
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ball.torque_impulse = Vec3::new(0.0, 0.0, 0.1);
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}
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if keys.pressed(KeyCode::ArrowDown) {
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ball.torque_impulse = Vec3::new(0.0, 0.0, -0.1);
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}
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if keys.pressed(KeyCode::ArrowLeft) {
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ball.torque_impulse = Vec3::new(0.1, 0.0, 0.0);
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}
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if keys.pressed(KeyCode::ArrowRight) {
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ball.torque_impulse = Vec3::new(-0.1, 0.0, 0.0);
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}
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}
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#[derive(Debug)]
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enum WithinBounds {
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Enter(Entity, Entity),
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Exit(Entity, Entity),
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}
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#[derive(Component, Debug)]
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struct Marker;
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fn read_events(
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mut events: EventReader<CollisionEvent>,
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mut commands: Commands,
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) {
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events.read().filter_map(|collision_event| {
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match collision_event {
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CollisionEvent::Started(a, b, flags) => {
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(*flags == CollisionEventFlags::SENSOR).then_some(WithinBounds::Enter(*a, *b))
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},
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CollisionEvent::Stopped(a, b, flags) => {
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(*flags == CollisionEventFlags::SENSOR).then_some(WithinBounds::Exit(*a, *b))
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}
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}
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}).for_each(|within_bounds| {
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info!("Event: {:?}", within_bounds);
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})
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}
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