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https://github.com/bevyengine/bevy
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# Objective Split - containing only the fixed typos - https://github.com/bevyengine/bevy/pull/12036#pullrequestreview-1894738751 # Migration Guide In `crates/bevy_mikktspace/src/generated.rs` ```rs // before pub struct SGroup { pub iVertexRepresentitive: i32, .. } // after pub struct SGroup { pub iVertexRepresentative: i32, .. } ``` In `crates/bevy_core_pipeline/src/core_2d/mod.rs` ```rs // before Node2D::ConstrastAdaptiveSharpening // after Node2D::ContrastAdaptiveSharpening ``` --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> Co-authored-by: James Liu <contact@jamessliu.com> Co-authored-by: François <mockersf@gmail.com>
662 lines
19 KiB
Rust
662 lines
19 KiB
Rust
//! This example demonstrates how each of Bevy's math primitives look like in 2D and 3D with meshes
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//! and with gizmos
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#![allow(clippy::match_same_arms)]
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use bevy::{
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input::common_conditions::input_just_pressed, prelude::*, sprite::MaterialMesh2dBundle,
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};
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const LEFT_RIGHT_OFFSET_2D: f32 = 200.0;
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const LEFT_RIGHT_OFFSET_3D: f32 = 2.0;
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fn main() {
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let mut app = App::new();
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app.add_plugins(DefaultPlugins)
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.init_state::<PrimitiveSelected>()
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.init_state::<CameraActive>();
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// cameras
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app.add_systems(Startup, (setup_cameras, setup_lights, setup_ambient_light))
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.add_systems(
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Update,
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(
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update_active_cameras.run_if(state_changed::<CameraActive>),
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switch_cameras.run_if(input_just_pressed(KeyCode::KeyC)),
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),
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);
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// text
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// PostStartup since we need the cameras to exist
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app.add_systems(PostStartup, setup_text);
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app.add_systems(
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Update,
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(update_text.run_if(state_changed::<PrimitiveSelected>),),
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);
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// primitives
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app.add_systems(Startup, (spawn_primitive_2d, spawn_primitive_3d))
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.add_systems(
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Update,
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(
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switch_to_next_primitive.run_if(input_just_pressed(KeyCode::ArrowUp)),
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switch_to_previous_primitive.run_if(input_just_pressed(KeyCode::ArrowDown)),
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draw_gizmos_2d.run_if(in_mode(CameraActive::Dim2)),
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draw_gizmos_3d.run_if(in_mode(CameraActive::Dim3)),
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update_primitive_meshes.run_if(
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state_changed::<PrimitiveSelected>.or_else(state_changed::<CameraActive>),
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),
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rotate_primitive_2d_meshes,
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rotate_primitive_3d_meshes,
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),
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);
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app.run();
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}
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/// State for tracking which of the two cameras (2D & 3D) is currently active
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, States, Default, Reflect)]
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enum CameraActive {
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#[default]
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/// 2D Camera is active
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Dim2,
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/// 3D Camera is active
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Dim3,
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}
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/// State for tracking which primitives are currently displayed
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, States, Default, Reflect)]
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enum PrimitiveSelected {
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#[default]
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RectangleAndCuboid,
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CircleAndSphere,
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Ellipse,
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Triangle,
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Plane,
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Line,
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Segment,
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Polyline,
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Polygon,
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RegularPolygon,
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Capsule,
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Cylinder,
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Cone,
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ConicalFrustum,
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Torus,
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}
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impl std::fmt::Display for PrimitiveSelected {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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let name = match self {
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PrimitiveSelected::RectangleAndCuboid => String::from("Rectangle/Cuboid"),
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PrimitiveSelected::CircleAndSphere => String::from("Circle/Sphere"),
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other => format!("{other:?}"),
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};
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write!(f, "{name}")
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}
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}
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impl PrimitiveSelected {
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const ALL: [Self; 15] = [
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Self::RectangleAndCuboid,
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Self::CircleAndSphere,
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Self::Ellipse,
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Self::Triangle,
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Self::Plane,
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Self::Line,
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Self::Segment,
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Self::Polyline,
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Self::Polygon,
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Self::RegularPolygon,
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Self::Capsule,
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Self::Cylinder,
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Self::Cone,
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Self::ConicalFrustum,
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Self::Torus,
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];
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fn next(self) -> Self {
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Self::ALL
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.into_iter()
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.cycle()
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.skip_while(|&x| x != self)
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.nth(1)
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.unwrap()
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}
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fn previous(self) -> Self {
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Self::ALL
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.into_iter()
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.rev()
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.cycle()
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.skip_while(|&x| x != self)
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.nth(1)
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.unwrap()
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}
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}
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const SMALL_2D: f32 = 50.0;
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const BIG_2D: f32 = 100.0;
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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 RECTANGLE: Rectangle = Rectangle {
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half_size: Vec2::new(SMALL_2D, BIG_2D),
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};
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const CUBOID: Cuboid = Cuboid {
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half_size: Vec3::new(BIG_3D, SMALL_3D, BIG_3D),
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};
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const CIRCLE: Circle = Circle { radius: BIG_2D };
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const SPHERE: Sphere = Sphere { radius: BIG_3D };
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const ELLIPSE: Ellipse = Ellipse {
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half_size: Vec2::new(BIG_2D, SMALL_2D),
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};
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const TRIANGLE: Triangle2d = Triangle2d {
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vertices: [
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Vec2::new(SMALL_2D, 0.0),
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Vec2::new(0.0, SMALL_2D),
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Vec2::new(-SMALL_2D, 0.0),
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],
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};
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const PLANE_2D: Plane2d = Plane2d {
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normal: Direction2d::Y,
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};
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const PLANE_3D: Plane3d = Plane3d {
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normal: Direction3d::Y,
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};
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const LINE2D: Line2d = Line2d {
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direction: Direction2d::X,
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};
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const LINE3D: Line3d = Line3d {
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direction: Direction3d::X,
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};
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const SEGMENT_2D: Segment2d = Segment2d {
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direction: Direction2d::X,
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half_length: BIG_2D,
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};
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const SEGMENT_3D: Segment3d = Segment3d {
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direction: Direction3d::X,
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half_length: BIG_3D,
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};
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const POLYLINE_2D: Polyline2d<4> = Polyline2d {
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vertices: [
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Vec2::new(-BIG_2D, -SMALL_2D),
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Vec2::new(-SMALL_2D, SMALL_2D),
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Vec2::new(SMALL_2D, -SMALL_2D),
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Vec2::new(BIG_2D, SMALL_2D),
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],
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};
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const POLYLINE_3D: Polyline3d<4> = Polyline3d {
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vertices: [
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Vec3::new(-BIG_3D, -SMALL_3D, -SMALL_3D),
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Vec3::new(SMALL_3D, SMALL_3D, 0.0),
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Vec3::new(-SMALL_3D, -SMALL_3D, 0.0),
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Vec3::new(BIG_3D, SMALL_3D, SMALL_3D),
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],
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};
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const POLYGON_2D: Polygon<5> = Polygon {
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vertices: [
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Vec2::new(-BIG_2D, -SMALL_2D),
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Vec2::new(BIG_2D, -SMALL_2D),
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Vec2::new(BIG_2D, SMALL_2D),
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Vec2::new(0.0, 0.0),
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Vec2::new(-BIG_2D, SMALL_2D),
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],
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};
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const REGULAR_POLYGON: RegularPolygon = RegularPolygon {
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circumcircle: Circle { radius: BIG_2D },
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sides: 5,
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};
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const CAPSULE_2D: Capsule2d = Capsule2d {
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radius: SMALL_2D,
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half_length: SMALL_2D,
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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 CONE: Cone = Cone {
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radius: BIG_3D,
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height: BIG_3D,
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};
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const CONICAL_FRUSTUM: ConicalFrustum = ConicalFrustum {
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radius_top: BIG_3D,
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radius_bottom: SMALL_3D,
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height: BIG_3D,
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};
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const TORUS: Torus = Torus {
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minor_radius: SMALL_3D / 2.0,
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major_radius: SMALL_3D * 1.5,
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};
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fn setup_cameras(mut commands: Commands) {
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let start_in_2d = true;
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let make_camera = |is_active| Camera {
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is_active,
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..Default::default()
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};
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commands.spawn(Camera2dBundle {
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camera: make_camera(start_in_2d),
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..Default::default()
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});
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commands.spawn(Camera3dBundle {
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camera: make_camera(!start_in_2d),
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transform: Transform::from_xyz(0.0, 10.0, 0.0).looking_at(Vec3::ZERO, Vec3::Z),
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..Default::default()
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});
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}
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fn setup_ambient_light(mut ambient_light: ResMut<AmbientLight>) {
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ambient_light.brightness = 50.0;
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}
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fn setup_lights(mut commands: Commands) {
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commands.spawn(PointLightBundle {
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point_light: PointLight {
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intensity: 5000.0,
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..default()
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},
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transform: Transform::from_translation(Vec3::new(-LEFT_RIGHT_OFFSET_3D, 2.0, 0.0))
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.looking_at(Vec3::new(-LEFT_RIGHT_OFFSET_3D, 0.0, 0.0), Vec3::Y),
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..default()
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});
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}
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/// Marker component for header text
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#[derive(Debug, Clone, Component, Default, Reflect)]
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pub struct HeaderText;
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/// Marker component for header node
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#[derive(Debug, Clone, Component, Default, Reflect)]
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pub struct HeaderNode;
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fn update_active_cameras(
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state: Res<State<CameraActive>>,
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mut camera_2d: Query<(Entity, &mut Camera), With<Camera2d>>,
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mut camera_3d: Query<(Entity, &mut Camera), (With<Camera3d>, Without<Camera2d>)>,
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mut text: Query<&mut TargetCamera, With<HeaderNode>>,
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) {
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let (entity_2d, mut cam_2d) = camera_2d.single_mut();
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let (entity_3d, mut cam_3d) = camera_3d.single_mut();
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let is_camera_2d_active = matches!(*state.get(), CameraActive::Dim2);
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cam_2d.is_active = is_camera_2d_active;
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cam_3d.is_active = !is_camera_2d_active;
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let active_camera = if is_camera_2d_active {
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entity_2d
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} else {
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entity_3d
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};
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text.iter_mut().for_each(|mut target_camera| {
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*target_camera = TargetCamera(active_camera);
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});
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}
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fn switch_cameras(current: Res<State<CameraActive>>, mut next: ResMut<NextState<CameraActive>>) {
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let next_state = match current.get() {
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CameraActive::Dim2 => CameraActive::Dim3,
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CameraActive::Dim3 => CameraActive::Dim2,
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};
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next.set(next_state);
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}
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fn setup_text(
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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cameras: Query<(Entity, &Camera)>,
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) {
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let active_camera = cameras
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.iter()
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.find_map(|(entity, camera)| camera.is_active.then_some(entity))
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.expect("run condition ensures existence");
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let text = format!("{text}", text = PrimitiveSelected::default());
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let font_size = 24.0;
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let font: Handle<Font> = asset_server.load("fonts/FiraMono-Medium.ttf");
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let style = TextStyle {
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font,
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font_size,
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color: Color::WHITE,
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};
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let instructions = "Press 'C' to switch between 2D and 3D mode\n\
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Press 'Up' or 'Down' to switch to the next/previous primitive";
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let text = [
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TextSection::new("Primitive: ", style.clone()),
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TextSection::new(text, style.clone()),
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TextSection::new("\n\n", style.clone()),
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TextSection::new(instructions, style.clone()),
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TextSection::new("\n\n", style.clone()),
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TextSection::new(
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"(If nothing is displayed, there's no rendering support yet)",
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style.clone(),
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),
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];
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commands
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.spawn((
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HeaderNode,
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NodeBundle {
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style: Style {
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justify_self: JustifySelf::Center,
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top: Val::Px(5.0),
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..Default::default()
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},
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..Default::default()
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},
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TargetCamera(active_camera),
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))
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.with_children(|parent| {
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parent.spawn((
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HeaderText,
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TextBundle::from_sections(text).with_text_justify(JustifyText::Center),
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));
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});
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}
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fn update_text(
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primitive_state: Res<State<PrimitiveSelected>>,
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mut header: Query<&mut Text, With<HeaderText>>,
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) {
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let new_text = format!("{text}", text = primitive_state.get());
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header.iter_mut().for_each(|mut header_text| {
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if let Some(kind) = header_text.sections.get_mut(1) {
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kind.value = new_text.clone();
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};
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});
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}
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fn switch_to_next_primitive(
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current: Res<State<PrimitiveSelected>>,
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mut next: ResMut<NextState<PrimitiveSelected>>,
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) {
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let next_state = current.get().next();
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next.set(next_state);
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}
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fn switch_to_previous_primitive(
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current: Res<State<PrimitiveSelected>>,
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mut next: ResMut<NextState<PrimitiveSelected>>,
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) {
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let next_state = current.get().previous();
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next.set(next_state);
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}
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fn in_mode(active: CameraActive) -> impl Fn(Res<State<CameraActive>>) -> bool {
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move |state| *state.get() == active
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}
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fn draw_gizmos_2d(mut gizmos: Gizmos, state: Res<State<PrimitiveSelected>>, time: Res<Time>) {
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const POSITION: Vec2 = Vec2::new(-LEFT_RIGHT_OFFSET_2D, 0.0);
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let angle = time.elapsed_seconds();
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let color = Color::WHITE;
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match state.get() {
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PrimitiveSelected::RectangleAndCuboid => {
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gizmos.primitive_2d(RECTANGLE, POSITION, angle, color);
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}
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PrimitiveSelected::CircleAndSphere => gizmos.primitive_2d(CIRCLE, POSITION, angle, color),
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PrimitiveSelected::Ellipse => gizmos.primitive_2d(ELLIPSE, POSITION, angle, color),
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PrimitiveSelected::Triangle => gizmos.primitive_2d(TRIANGLE, POSITION, angle, color),
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PrimitiveSelected::Plane => gizmos.primitive_2d(PLANE_2D, POSITION, angle, color),
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PrimitiveSelected::Line => drop(gizmos.primitive_2d(LINE2D, POSITION, angle, color)),
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PrimitiveSelected::Segment => drop(gizmos.primitive_2d(SEGMENT_2D, POSITION, angle, color)),
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PrimitiveSelected::Polyline => gizmos.primitive_2d(POLYLINE_2D, POSITION, angle, color),
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PrimitiveSelected::Polygon => gizmos.primitive_2d(POLYGON_2D, POSITION, angle, color),
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PrimitiveSelected::RegularPolygon => {
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gizmos.primitive_2d(REGULAR_POLYGON, POSITION, angle, color);
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}
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PrimitiveSelected::Capsule => gizmos.primitive_2d(CAPSULE_2D, POSITION, angle, color),
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PrimitiveSelected::Cylinder => {}
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PrimitiveSelected::Cone => {}
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PrimitiveSelected::ConicalFrustum => {}
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PrimitiveSelected::Torus => {}
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}
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}
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/// Marker for primitive meshes to record in which state they should be visible in
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#[derive(Debug, Clone, Component, Default, Reflect)]
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pub struct PrimitiveData {
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camera_mode: CameraActive,
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primitive_state: PrimitiveSelected,
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}
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/// Marker for meshes of 2D primitives
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#[derive(Debug, Clone, Component, Default)]
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pub struct MeshDim2;
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/// Marker for meshes of 3D primitives
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#[derive(Debug, Clone, Component, Default)]
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pub struct MeshDim3;
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fn spawn_primitive_2d(
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mut commands: Commands,
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mut materials: ResMut<Assets<ColorMaterial>>,
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mut meshes: ResMut<Assets<Mesh>>,
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) {
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const POSITION: Vec3 = Vec3::new(LEFT_RIGHT_OFFSET_2D, 0.0, 0.0);
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let material: Handle<ColorMaterial> = materials.add(Color::WHITE);
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let camera_mode = CameraActive::Dim2;
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[
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Some(RECTANGLE.mesh()),
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Some(CIRCLE.mesh().build()),
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Some(ELLIPSE.mesh().build()),
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Some(TRIANGLE.mesh()),
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None, // plane
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None, // line
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None, // segment
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None, // polyline
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None, // polygon
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Some(REGULAR_POLYGON.mesh()),
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Some(CAPSULE_2D.mesh().build()),
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None, // cylinder
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None, // cone
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None, // conical frustum
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None, // torus
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]
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.into_iter()
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.zip(PrimitiveSelected::ALL)
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.for_each(|(maybe_mesh, state)| {
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if let Some(mesh) = maybe_mesh {
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commands.spawn((
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MeshDim2,
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PrimitiveData {
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camera_mode,
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primitive_state: state,
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},
|
|
MaterialMesh2dBundle {
|
|
mesh: meshes.add(mesh).into(),
|
|
material: material.clone(),
|
|
transform: Transform::from_translation(POSITION),
|
|
..Default::default()
|
|
},
|
|
));
|
|
}
|
|
});
|
|
}
|
|
|
|
fn spawn_primitive_3d(
|
|
mut commands: Commands,
|
|
mut materials: ResMut<Assets<StandardMaterial>>,
|
|
mut meshes: ResMut<Assets<Mesh>>,
|
|
) {
|
|
const POSITION: Vec3 = Vec3::new(-LEFT_RIGHT_OFFSET_3D, 0.0, 0.0);
|
|
let material: Handle<StandardMaterial> = materials.add(Color::WHITE);
|
|
let camera_mode = CameraActive::Dim3;
|
|
[
|
|
Some(CUBOID.mesh()),
|
|
Some(SPHERE.mesh().build()),
|
|
None, // ellipse
|
|
None, // triangle
|
|
Some(PLANE_3D.mesh().build()),
|
|
None, // line
|
|
None, // segment
|
|
None, // polyline
|
|
None, // polygon
|
|
None, // regular polygon
|
|
Some(CAPSULE_3D.mesh().build()),
|
|
Some(CYLINDER.mesh().build()),
|
|
None, // cone
|
|
None, // conical frustum
|
|
Some(TORUS.mesh().build()),
|
|
]
|
|
.into_iter()
|
|
.zip(PrimitiveSelected::ALL)
|
|
.for_each(|(maybe_mesh, state)| {
|
|
if let Some(mesh) = maybe_mesh {
|
|
commands.spawn((
|
|
MeshDim3,
|
|
PrimitiveData {
|
|
camera_mode,
|
|
primitive_state: state,
|
|
},
|
|
PbrBundle {
|
|
mesh: meshes.add(mesh),
|
|
material: material.clone(),
|
|
transform: Transform::from_translation(POSITION),
|
|
..Default::default()
|
|
},
|
|
));
|
|
}
|
|
});
|
|
}
|
|
|
|
fn update_primitive_meshes(
|
|
camera_state: Res<State<CameraActive>>,
|
|
primitive_state: Res<State<PrimitiveSelected>>,
|
|
mut primitives: Query<(&mut Visibility, &PrimitiveData)>,
|
|
) {
|
|
primitives.iter_mut().for_each(|(mut vis, primitive)| {
|
|
let visible = primitive.camera_mode == *camera_state.get()
|
|
&& primitive.primitive_state == *primitive_state.get();
|
|
*vis = if visible {
|
|
Visibility::Inherited
|
|
} else {
|
|
Visibility::Hidden
|
|
};
|
|
});
|
|
}
|
|
|
|
fn rotate_primitive_2d_meshes(
|
|
mut primitives_2d: Query<
|
|
(&mut Transform, &ViewVisibility),
|
|
(With<PrimitiveData>, With<MeshDim2>),
|
|
>,
|
|
time: Res<Time>,
|
|
) {
|
|
let rotation_2d = Quat::from_mat3(&Mat3::from_angle(time.elapsed_seconds()));
|
|
primitives_2d
|
|
.iter_mut()
|
|
.filter(|(_, vis)| vis.get())
|
|
.for_each(|(mut transform, _)| {
|
|
transform.rotation = rotation_2d;
|
|
});
|
|
}
|
|
|
|
fn rotate_primitive_3d_meshes(
|
|
mut primitives_3d: Query<
|
|
(&mut Transform, &ViewVisibility),
|
|
(With<PrimitiveData>, With<MeshDim3>),
|
|
>,
|
|
time: Res<Time>,
|
|
) {
|
|
let rotation_3d = Quat::from_rotation_arc(
|
|
Vec3::Z,
|
|
Vec3::new(
|
|
time.elapsed_seconds().sin(),
|
|
time.elapsed_seconds().cos(),
|
|
time.elapsed_seconds().sin() * 0.5,
|
|
)
|
|
.try_normalize()
|
|
.unwrap_or(Vec3::Z),
|
|
);
|
|
primitives_3d
|
|
.iter_mut()
|
|
.filter(|(_, vis)| vis.get())
|
|
.for_each(|(mut transform, _)| {
|
|
transform.rotation = rotation_3d;
|
|
});
|
|
}
|
|
|
|
fn draw_gizmos_3d(mut gizmos: Gizmos, state: Res<State<PrimitiveSelected>>, time: Res<Time>) {
|
|
const POSITION: Vec3 = Vec3::new(LEFT_RIGHT_OFFSET_3D, 0.0, 0.0);
|
|
let rotation = Quat::from_rotation_arc(
|
|
Vec3::Z,
|
|
Vec3::new(
|
|
time.elapsed_seconds().sin(),
|
|
time.elapsed_seconds().cos(),
|
|
time.elapsed_seconds().sin() * 0.5,
|
|
)
|
|
.try_normalize()
|
|
.unwrap_or(Vec3::Z),
|
|
);
|
|
let color = Color::WHITE;
|
|
let segments = 10;
|
|
|
|
match state.get() {
|
|
PrimitiveSelected::RectangleAndCuboid => {
|
|
gizmos.primitive_3d(CUBOID, POSITION, rotation, color);
|
|
}
|
|
PrimitiveSelected::CircleAndSphere => drop(
|
|
gizmos
|
|
.primitive_3d(SPHERE, POSITION, rotation, color)
|
|
.segments(segments),
|
|
),
|
|
PrimitiveSelected::Ellipse => {}
|
|
PrimitiveSelected::Triangle => {}
|
|
PrimitiveSelected::Plane => drop(gizmos.primitive_3d(PLANE_3D, POSITION, rotation, color)),
|
|
PrimitiveSelected::Line => gizmos.primitive_3d(LINE3D, POSITION, rotation, color),
|
|
PrimitiveSelected::Segment => gizmos.primitive_3d(SEGMENT_3D, POSITION, rotation, color),
|
|
PrimitiveSelected::Polyline => gizmos.primitive_3d(POLYLINE_3D, POSITION, rotation, color),
|
|
PrimitiveSelected::Polygon => {}
|
|
PrimitiveSelected::RegularPolygon => {}
|
|
PrimitiveSelected::Capsule => drop(
|
|
gizmos
|
|
.primitive_3d(CAPSULE_3D, POSITION, rotation, color)
|
|
.segments(segments),
|
|
),
|
|
PrimitiveSelected::Cylinder => drop(
|
|
gizmos
|
|
.primitive_3d(CYLINDER, POSITION, rotation, color)
|
|
.segments(segments),
|
|
),
|
|
PrimitiveSelected::Cone => drop(
|
|
gizmos
|
|
.primitive_3d(CONE, POSITION, rotation, color)
|
|
.segments(segments),
|
|
),
|
|
PrimitiveSelected::ConicalFrustum => {
|
|
gizmos.primitive_3d(CONICAL_FRUSTUM, POSITION, rotation, color);
|
|
}
|
|
|
|
PrimitiveSelected::Torus => drop(
|
|
gizmos
|
|
.primitive_3d(TORUS, POSITION, rotation, color)
|
|
.minor_segments(segments)
|
|
.major_segments(segments),
|
|
),
|
|
}
|
|
}
|