Struct Aabb 

#[repr(C)]
pub struct Aabb {
    pub min: Vec3,
    pub max: Vec3,
}

Represents an Axis-Aligned Bounding Box (AABB).

An AABB is a rectangular prism aligned with the coordinate axes, defined by its minimum and maximum corner points. It is a simple but highly efficient volume for broad-phase collision detection and visibility culling.

Fields

min: Vec3

The corner of the box with the smallest coordinates on all axes.

max: Vec3

The corner of the box with the largest coordinates on all axes.

Implementations

impl Aabb

pub const INVALID: Aabb

An invalid Aabb where min components are positive infinity and max are negative infinity.

This is useful as a neutral starting point for merging operations. Merging any valid Aabb with INVALID will result in that valid Aabb.

pub fn from_min_max(min_pt: Vec3, max_pt: Vec3) -> Aabb

Creates a new Aabb from two corner points.

This constructor automatically ensures that the min field holds the component-wise minimum and max holds the component-wise maximum, regardless of the order the points are passed in.

pub fn from_center_half_extents(center: Vec3, half_extents: Vec3) -> Aabb

Creates a new Aabb from a center point and its half-extents.

The half-extents represent the distance from the center to the faces of the box. The provided half_extents will be made non-negative.

pub fn from_half_extents(half_extents: Vec3) -> Aabb

Creates a new Aabb centered at the origin with the given half-extents.

pub fn from_point(point: Vec3) -> Aabb

Creates a degenerate Aabb containing a single point (min and max are the same).

pub fn from_points(points: &[Vec3]) -> Option<Aabb>

Creates an Aabb that tightly encloses a given set of points.

Returns

Returns Some(Aabb) if the input slice is not empty, otherwise None.

pub fn center(&self) -> Vec3

Calculates the center point of the Aabb.

pub fn half_extents(&self) -> Vec3

Calculates the half-extents (half the size on each axis) of the Aabb.

pub fn size(&self) -> Vec3

Calculates the full size (width, height, depth) of the Aabb.

pub fn is_valid(&self) -> bool

Checks if the Aabb is valid (i.e., min <= max on all axes). Degenerate boxes where min == max are considered valid.

pub fn contains_point(&self, point: Vec3) -> bool

Checks if a point is contained within or on the boundary of the Aabb.

pub fn intersects_aabb(&self, other: &Aabb) -> bool

Checks if this Aabb intersects with another Aabb.

Two Aabbs intersect if they overlap on all three axes. Boxes that only touch at the boundary are considered to be intersecting.

pub fn merge(&self, other: &Aabb) -> Aabb

Creates a new Aabb that encompasses both this Aabb and another one.

pub fn merged_with_point(&self, point: Vec3) -> Aabb

Creates a new Aabb that encompasses both this Aabb and an additional point.

pub fn transform(&self, matrix: &Mat4) -> Aabb

Computes the bounding box that encloses this Aabb after a transformation.

This method is more efficient than transforming all 8 corners of the box for affine transformations. It works by transforming the center of the box and then calculating the new extents by projecting the original extents onto the axes of the transformed space.

Note

This method is designed for affine transformations (like rotation, translation, scale). It may not produce the tightest-fitting box for transformations involving perspective.

pub fn surface_area(&self) -> f32

Calculates the surface area of the Aabb.

Useful for SAH (Surface Area Heuristic) in BVH construction.

pub fn contains_aabb(&self, other: &Aabb) -> bool

Checks if this Aabb fully contains another Aabb.

pub fn intersect_ray(&self, origin: Vec3, inv_dir: Vec3) -> Option<f32>

Intersection test against a ray using the Slab Method.

inv_dir should be 1.0 / ray.direction. If a component of direction is zero, inv_dir should be infinity. Returns the distance to the intersection point if it occurs.

Trait Implementations

impl Clone for Aabb

fn clone(&self) -> Aabb

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Aabb

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

Formats the value using the given formatter.

impl Default for Aabb

fn default() -> Aabb

Returns the default Aabb, which is Aabb::INVALID.

impl PartialEq for Aabb

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for Aabb

impl StructuralPartialEq for Aabb