Struct bevy::math::primitives::Triangle2d

pub struct Triangle2d {
    pub vertices: [Vec2; 3],
}

A triangle in 2D space

Fields

vertices: [Vec2; 3]

The vertices of the triangle

Implementations

impl Triangle2d

pub const fn new(a: Vec2, b: Vec2, c: Vec2) -> Triangle2d

Create a new Triangle2d from points a, b, and c

Examples found in repository

examples/2d/2d_shapes.rs (lines 31-35)

fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<ColorMaterial>>,
) {
    commands.spawn(Camera2dBundle::default());

    let shapes = [
        Mesh2dHandle(meshes.add(Circle { radius: 50.0 })),
        Mesh2dHandle(meshes.add(Ellipse::new(25.0, 50.0))),
        Mesh2dHandle(meshes.add(Annulus::new(25.0, 50.0))),
        Mesh2dHandle(meshes.add(Capsule2d::new(25.0, 50.0))),
        Mesh2dHandle(meshes.add(Rectangle::new(50.0, 100.0))),
        Mesh2dHandle(meshes.add(RegularPolygon::new(50.0, 6))),
        Mesh2dHandle(meshes.add(Triangle2d::new(
            Vec2::Y * 50.0,
            Vec2::new(-50.0, -50.0),
            Vec2::new(50.0, -50.0),
        ))),
    ];
    let num_shapes = shapes.len();

    for (i, shape) in shapes.into_iter().enumerate() {
        // Distribute colors evenly across the rainbow.
        let color = Color::hsl(360. * i as f32 / num_shapes as f32, 0.95, 0.7);

        commands.spawn(MaterialMesh2dBundle {
            mesh: shape,
            material: materials.add(color),
            transform: Transform::from_xyz(
                // Distribute shapes from -X_EXTENT/2 to +X_EXTENT/2.
                -X_EXTENT / 2. + i as f32 / (num_shapes - 1) as f32 * X_EXTENT,
                0.0,
                0.0,
            ),
            ..default()
        });
    }
}

examples/2d/wireframe_2d.rs (lines 64-68)

fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<ColorMaterial>>,
) {
    // Triangle: Never renders a wireframe
    commands.spawn((
        MaterialMesh2dBundle {
            mesh: meshes
                .add(Triangle2d::new(
                    Vec2::new(0.0, 50.0),
                    Vec2::new(-50.0, -50.0),
                    Vec2::new(50.0, -50.0),
                ))
                .into(),
            material: materials.add(Color::BLACK),
            transform: Transform::from_xyz(-150.0, 0.0, 0.0),
            ..default()
        },
        NoWireframe2d,
    ));
    // Rectangle: Follows global wireframe setting
    commands.spawn(MaterialMesh2dBundle {
        mesh: meshes.add(Rectangle::new(100.0, 100.0)).into(),
        material: materials.add(Color::BLACK),
        transform: Transform::from_xyz(0.0, 0.0, 0.0),
        ..default()
    });
    // Circle: Always renders a wireframe
    commands.spawn((
        MaterialMesh2dBundle {
            mesh: meshes.add(Circle::new(50.0)).into(),
            material: materials.add(Color::BLACK),
            transform: Transform::from_xyz(150.0, 0.0, 0.0),
            ..default()
        },
        Wireframe2d,
        // This lets you configure the wireframe color of this entity.
        // If not set, this will use the color in `WireframeConfig`
        Wireframe2dColor { color: GREEN },
    ));

    // Camera
    commands.spawn(Camera2dBundle::default());

    // Text used to show controls
    commands.spawn(
        TextBundle::from_section("", TextStyle::default()).with_style(Style {
            position_type: PositionType::Absolute,
            top: Val::Px(10.0),
            left: Val::Px(10.0),
            ..default()
        }),
    );
}

examples/2d/bounding_2d.rs (lines 226-230)

fn setup(mut commands: Commands, loader: Res<AssetServer>) {
    commands.spawn(Camera2dBundle::default());
    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(-OFFSET_X, OFFSET_Y, 0.),
            ..default()
        },
        Shape::Circle(Circle::new(45.)),
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(0., OFFSET_Y, 0.),
            ..default()
        },
        Shape::Rectangle(Rectangle::new(80., 80.)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(OFFSET_X, OFFSET_Y, 0.),
            ..default()
        },
        Shape::Triangle(Triangle2d::new(
            Vec2::new(-40., -40.),
            Vec2::new(-20., 40.),
            Vec2::new(40., 50.),
        )),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(-OFFSET_X, -OFFSET_Y, 0.),
            ..default()
        },
        Shape::Line(Segment2d::new(Dir2::from_xy(1., 0.3).unwrap(), 90.)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(0., -OFFSET_Y, 0.),
            ..default()
        },
        Shape::Capsule(Capsule2d::new(25., 50.)),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(OFFSET_X, -OFFSET_Y, 0.),
            ..default()
        },
        Shape::Polygon(RegularPolygon::new(50., 6)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn(
        TextBundle::from_section(
            "",
            TextStyle {
                font: loader.load("fonts/FiraMono-Medium.ttf"),
                font_size: 26.0,
                ..default()
            },
        )
        .with_style(Style {
            position_type: PositionType::Absolute,
            bottom: Val::Px(10.0),
            left: Val::Px(10.0),
            ..default()
        }),
    );
}

pub fn area(&self) -> f32

Get the area of the triangle

pub fn perimeter(&self) -> f32

Get the perimeter of the triangle

pub fn winding_order(&self) -> WindingOrder

Get the WindingOrder of the triangle

pub fn circumcircle(&self) -> (Circle, Vec2)

Compute the circle passing through all three vertices of the triangle. The vector in the returned tuple is the circumcenter.

pub fn reverse(&mut self)

Reverse the WindingOrder of the triangle by swapping the first and last vertices

Trait Implementations

impl Bounded2d for Triangle2d

fn aabb_2d(&self, translation: Vec2, rotation: impl Into<Rotation2d>) -> Aabb2d

Get an axis-aligned bounding box for the shape with the given translation and rotation. The rotation is in radians, counterclockwise, with 0 meaning no rotation.

fn bounding_circle( &self, translation: Vec2, rotation: impl Into<Rotation2d> ) -> BoundingCircle

Get a bounding circle for the shape The rotation is in radians, counterclockwise, with 0 meaning no rotation.

impl Clone for Triangle2d

fn clone(&self) -> Triangle2d

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Triangle2d

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Triangle2d

fn default() -> Triangle2d

Returns the default Triangle2d with the vertices [0.0, 0.5], [-0.5, -0.5], and [0.5, -0.5].

impl<'de> Deserialize<'de> for Triangle2d

fn deserialize<__D>( __deserializer: __D ) -> Result<Triangle2d, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Triangle2d> for Mesh

fn from(triangle: Triangle2d) -> Mesh

Converts to this type from the input type.

impl FromReflect for Triangle2d

where Triangle2d: Any + Send + Sync, [Vec2; 3]: FromReflect + TypePath + RegisterForReflection,

fn from_reflect(reflect: &(dyn Reflect + 'static)) -> Option<Triangle2d>

Constructs a concrete instance of Self from a reflected value.

fn take_from_reflect( reflect: Box<dyn Reflect> ) -> Result<Self, Box<dyn Reflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails.

impl GetTypeRegistration for Triangle2d

where Triangle2d: Any + Send + Sync, [Vec2; 3]: FromReflect + TypePath + RegisterForReflection,

fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.

fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type.

impl<'w, 's, Config, Clear> GizmoPrimitive2d<Triangle2d> for Gizmos<'w, 's, Config, Clear>

where Config: GizmoConfigGroup, Clear: 'static + Send + Sync,

type Output<'a> = () where Gizmos<'w, 's, Config, Clear>: 'a

The output of primitive_2d. This is a builder to set non-default values.

fn primitive_2d( &mut self, primitive: Triangle2d, position: Vec2, angle: f32, color: impl Into<Color> ) -> <Gizmos<'w, 's, Config, Clear> as GizmoPrimitive2d<Triangle2d>>::Output<'_>

Renders a 2D primitive with its associated details.

impl Meshable for Triangle2d

type Output = Mesh

The output of Self::mesh. This can either be a Mesh or a builder used for creating a Mesh.

fn mesh(&self) -> <Triangle2d as Meshable>::Output

Creates a Mesh for a shape.

impl PartialEq for Triangle2d

fn eq(&self, other: &Triangle2d) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Reflect for Triangle2d

where Triangle2d: Any + Send + Sync, [Vec2; 3]: FromReflect + TypePath + RegisterForReflection,

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value.

fn into_any(self: Box<Triangle2d>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<Triangle2d>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable reflected value.

fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object.

fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value.

fn apply(&mut self, value: &(dyn Reflect + 'static))

Applies a reflected value to this value.

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<Triangle2d>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn reflect_partial_eq(&self, value: &(dyn Reflect + 'static)) -> Option<bool>

Returns a “partial equality” comparison result.

fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Debug formatter for the value.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value.

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl Serialize for Triangle2d

fn serialize<__S>( &self, __serializer: __S ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ShapeSample for Triangle2d

type Output = Vec2

The type of vector returned by the sample methods, Vec2 for 2D shapes and Vec3 for 3D shapes.

fn sample_interior<R>(&self, rng: &mut R) -> <Triangle2d as ShapeSample>::Output

where R: Rng + ?Sized,

Uniformly sample a point from inside the area/volume of this shape, centered on 0.

fn sample_boundary<R>(&self, rng: &mut R) -> <Triangle2d as ShapeSample>::Output

where R: Rng + ?Sized,

Uniformly sample a point from the surface of this shape, centered on 0.

impl Struct for Triangle2d

where Triangle2d: Any + Send + Sync, [Vec2; 3]: FromReflect + TypePath + RegisterForReflection,

fn field(&self, name: &str) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field named name as a &dyn Reflect.

fn field_mut(&mut self, name: &str) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field named name as a &mut dyn Reflect.

fn field_at(&self, index: usize) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field with index index as a &dyn Reflect.

fn field_at_mut(&mut self, index: usize) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.

fn name_at(&self, index: usize) -> Option<&str>

Returns the name of the field with index index.

fn field_len(&self) -> usize

Returns the number of fields in the struct.

fn iter_fields(&self) -> FieldIter<'_>

Returns an iterator over the values of the reflectable fields for this struct.

fn clone_dynamic(&self) -> DynamicStruct

Clones the struct into a DynamicStruct.

impl TypePath for Triangle2d

where Triangle2d: Any + Send + Sync,

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type.

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type.

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous.

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous.

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous.

impl Typed for Triangle2d

where Triangle2d: Any + Send + Sync, [Vec2; 3]: FromReflect + TypePath + RegisterForReflection,

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

impl Copy for Triangle2d

impl Primitive2d for Triangle2d

impl StructuralPartialEq for Triangle2d