beevee: aabb: add Bounded trait implementation

beevee/src/aabb/bounded.rs

@@ -0,0 +1,53 @@
+use super::AABB;
+use crate::Point;
+
+/// A trait for objects that can be bounded using an [`AABB`]
+///
+/// [`AABB`]: struct.AABB.html
+pub trait Bounded {
+    /// Return the [`AABB`] surrounding self.
+    ///
+    /// [`AABB`]: struct.AABB.html
+    fn aabb(&self) -> AABB;
+}
+
+/// Implementation of [`Bounded`] for [`AABB`]
+///
+/// [`Bounded`]: trait.Bounded.html
+/// [`AABB`]: struct.Point.html
+///
+/// # Examples
+/// ```
+/// use beevee::Point;
+/// use beevee::aabb::{AABB, Bounded};
+///
+/// let low = Point::new(0., 0., 0.);
+/// let high = Point::new(1., 2., 3.);
+/// let aabb = AABB::with_bounds(low, high);
+/// assert_eq!(aabb, aabb.aabb());
+/// ```
+impl Bounded for AABB {
+    fn aabb(&self) -> AABB {
+        *self
+    }
+}
+
+/// Implementation of [`Bounded`] for [`Point`]
+///
+/// [`Bounded`]: trait.Bounded.html
+/// [`Point`]: ../type.Point.html
+///
+/// # Examples
+/// ```
+/// use beevee::Point;
+/// use beevee::aabb::Bounded;
+///
+/// let point = Point::new(1., 2., 3.);
+/// let aabb = point.aabb();
+/// assert!(aabb.contains(&point));
+/// ```
+impl Bounded for Point {
+    fn aabb(&self) -> AABB {
+        AABB::with_bounds(*self, *self)
+    }
+}

beevee/src/aabb/mod.rs

@@ -1,4 +1,7 @@
 //! The module relating to Axis-Aligned Bounding Boxes.
 
+mod bounded;
+pub use bounded::*;
+
 mod bounding_box;
 pub use bounding_box::*;