Trait bevy_math::bounding::BoundingVolume

source ·
pub trait BoundingVolume: Sized {
    type Translation: Clone + Copy + PartialEq;
    type Rotation: Clone + Copy + PartialEq;
    type HalfSize;

Show 14 methods // Required methods fn center(&self) -> Self::Translation; fn half_size(&self) -> Self::HalfSize; fn visible_area(&self) -> f32; fn contains(&self, other: &Self) -> bool; fn merge(&self, other: &Self) -> Self; fn grow(&self, amount: impl Into<Self::HalfSize>) -> Self; fn shrink(&self, amount: impl Into<Self::HalfSize>) -> Self; fn scale_around_center(&self, scale: impl Into<Self::HalfSize>) -> Self; fn translate_by(&mut self, translation: impl Into<Self::Translation>); fn rotate_by(&mut self, rotation: impl Into<Self::Rotation>); // Provided methods fn transformed_by( self, translation: impl Into<Self::Translation>, rotation: impl Into<Self::Rotation> ) -> Self { ... } fn transform_by( &mut self, translation: impl Into<Self::Translation>, rotation: impl Into<Self::Rotation> ) { ... } fn translated_by(self, translation: impl Into<Self::Translation>) -> Self { ... } fn rotated_by(self, rotation: impl Into<Self::Rotation>) -> Self { ... }
}
Expand description

A trait that generalizes different bounding volumes. Bounding volumes are simplified shapes that are used to get simpler ways to check for overlapping elements or finding intersections.

This trait supports both 2D and 3D bounding shapes.

Required Associated Types§

source

type Translation: Clone + Copy + PartialEq

The position type used for the volume. This should be Vec2 for 2D and Vec3 for 3D.

source

type Rotation: Clone + Copy + PartialEq

The rotation type used for the volume. This should be f32 for 2D and Quat for 3D.

source

type HalfSize

The type used for the size of the bounding volume. Usually a half size. For example an f32 radius for a circle, or a Vec3 with half sizes for x, y and z for a 3D axis-aligned bounding box

Required Methods§

source

fn center(&self) -> Self::Translation

Returns the center of the bounding volume.

source

fn half_size(&self) -> Self::HalfSize

Returns the half size of the bounding volume.

source

fn visible_area(&self) -> f32

Computes the visible surface area of the bounding volume. This method can be useful to make decisions about merging bounding volumes, using a Surface Area Heuristic.

For 2D shapes this would simply be the area of the shape. For 3D shapes this would usually be half the area of the shape.

source

fn contains(&self, other: &Self) -> bool

Checks if this bounding volume contains another one.

source

fn merge(&self, other: &Self) -> Self

Computes the smallest bounding volume that contains both self and other.

source

fn grow(&self, amount: impl Into<Self::HalfSize>) -> Self

Increases the size of the bounding volume in each direction by the given amount.

source

fn shrink(&self, amount: impl Into<Self::HalfSize>) -> Self

Decreases the size of the bounding volume in each direction by the given amount.

source

fn scale_around_center(&self, scale: impl Into<Self::HalfSize>) -> Self

Scale the size of the bounding volume around its center by the given amount

source

fn translate_by(&mut self, translation: impl Into<Self::Translation>)

Translates the bounding volume by the given translation.

source

fn rotate_by(&mut self, rotation: impl Into<Self::Rotation>)

Rotates the bounding volume around the origin by the given rotation.

The result is a combination of the original volume and the rotated volume, so it is guaranteed to be either the same size or larger than the original.

Provided Methods§

source

fn transformed_by( self, translation: impl Into<Self::Translation>, rotation: impl Into<Self::Rotation> ) -> Self

Transforms the bounding volume by first rotating it around the origin and then applying a translation.

source

fn transform_by( &mut self, translation: impl Into<Self::Translation>, rotation: impl Into<Self::Rotation> )

Transforms the bounding volume by first rotating it around the origin and then applying a translation.

source

fn translated_by(self, translation: impl Into<Self::Translation>) -> Self

Translates the bounding volume by the given translation.

source

fn rotated_by(self, rotation: impl Into<Self::Rotation>) -> Self

Rotates the bounding volume around the origin by the given rotation.

The result is a combination of the original volume and the rotated volume, so it is guaranteed to be either the same size or larger than the original.

Object Safety§

This trait is not object safe.

Implementors§