Everything compiles
Elijah Voigt
1 month ago
parent
c3cd7f87b6
commit
acbf89a077
@ -1,222 +0,0 @@
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use bevy::{
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color::palettes::css::{BLUE, GREEN},
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render::mesh::{SphereKind, SphereMeshBuilder},
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};
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use bevy_rapier3d::rapier::prelude::CollisionEventFlags;
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use games::*;
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/// Example showing using Rapier3d to do area intersection
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///
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/// Have you ever wanted to detect if a character is within some bounds?
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/// This shows how to do that.
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fn main() {
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App::new()
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.add_plugins(BaseGamePlugin::default())
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.init_resource::<InsideArea>()
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.add_systems(
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Startup,
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(
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setup_physics_scene,
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setup_ui,
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position_camera.after(create_camera_3d),
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),
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)
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.add_systems(
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Update,
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(
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control_ball,
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process_events,
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sync_resource_to_ui::<InsideArea>.run_if(resource_changed::<InsideArea>),
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)
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.run_if(in_state(LoadingState::Idle)),
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)
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.run();
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}
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/// Which area the sphere is in/touching
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#[derive(Component, Debug, Clone)]
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enum AreaMarker {
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Green,
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Blue,
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}
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/// Setup a basic scene with:
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/// * Floor
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/// * A light for dramatic shadows
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/// * A sphere that can move
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/// * Two cubes that designate area intersection
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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.spawn((
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Collider::cuboid(100.0, 0.1, 100.0),
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Transform::from_xyz(0.0, -1.0, 0.0),
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Pickable::IGNORE,
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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 {
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color: WHITE.into(),
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intensity: 10_000_000.0,
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shadows_enabled: true,
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..default()
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},
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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.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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ActiveEvents::all(),
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Name::new("Ball"),
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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: WHITE.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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commands.spawn((
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Sensor,
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Collider::cuboid(1.0, 1.0, 1.0),
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Transform::from_xyz(0.0, 0.0, 2.0),
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Mesh3d(meshes.add(Cuboid::new(2.0, 2.0, 2.0))),
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Name::new("Green Area"),
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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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AreaMarker::Green,
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));
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// Create a box that the ball can pass into/through
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commands.spawn((
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Sensor,
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Collider::cuboid(1.0, 1.0, 1.0),
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Transform::from_xyz(0.0, 0.0, -2.0),
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Mesh3d(meshes.add(Cuboid::new(2.0, 2.0, 2.0))),
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Name::new("Blue Area"),
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MeshMaterial3d(materials.add(StandardMaterial {
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base_color: BLUE.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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AreaMarker::Blue,
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));
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}
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/// Setup the UI for this example that indicates if the game "sees" the sphere
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/// is inside the cube
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fn setup_ui(mut commands: Commands) {
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commands.spawn((
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Node {
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align_self: AlignSelf::Start,
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justify_self: JustifySelf::Center,
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..default()
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},
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Text("Placeholder".into()),
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SyncResource::<InsideArea>::default(),
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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(mut query: Query<&mut Transform, (With<Camera>, With<Camera3d>)>) {
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query.iter_mut().for_each(|mut t| {
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*t = Transform::from_xyz(10.0, 10.0, 10.0).looking_at(Vec3::ZERO, Vec3::Y);
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})
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}
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/// Control the ball based on arrow keys
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fn control_ball(keys: Res<ButtonInput<KeyCode>>, mut ball: Single<&mut ExternalImpulse>) {
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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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/// Maps CollisionEvent to a game-specific construct (did X enter/exit an area)
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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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/// Resource tracking what box the sphere is in
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#[derive(Resource, Debug, Default, Clone)]
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struct InsideArea(Option<AreaMarker>);
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impl Display for InsideArea {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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match self.0 {
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Some(AreaMarker::Blue) => write!(f, "Ball IS touching the BLUE box"),
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Some(AreaMarker::Green) => write!(f, "Ball IS touching the GREEN box"),
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None => write!(f, "Ball is NOT touching ANY box"),
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}
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}
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}
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/// Read collision events and procss them into resource updates to be displayed to the user
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fn process_events(
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mut events: MessageReader<CollisionEvent>,
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areas: Query<&AreaMarker>,
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mut inside: ResMut<InsideArea>,
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) {
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events
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.read()
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.filter_map(|collision_event| 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| match within_bounds {
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WithinBounds::Enter(a, b) => {
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if let Ok(x) = areas.get(a) {
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inside.0 = Some(x.clone());
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} else if let Ok(x) = areas.get(b) {
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inside.0 = Some(x.clone());
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}
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}
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WithinBounds::Exit(a, b) => {
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if areas.contains(a) || areas.contains(b) {
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inside.0 = None;
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}
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}
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})
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}
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