Translate method for AABBs

src/cgmath/aabb.rs

@@ -51,6 +51,11 @@ pub trait Aabb
         let mx : P = build(|i| self.max().i(i).max(p.i(i)));
         Aabb::new(&mn, &mx)
     }
+
+    // Returns a new AABB that has its points translated by the given vector.
+    fn translate(&self, v: &V) -> Self {
+        Aabb::new(&self.min().add_v(v), &self.max().add_v(v))
+    }
 }
 
 #[deriving(Clone, Eq)]

src/test/aabb.rs

@@ -35,4 +35,7 @@ fn test_aabb() {
     assert!(!aabb.contains(&Point3::new(10, 30, 5)));
     assert!(aabb.contains(&Point3::new(-20, -10, -5)));
     assert!(!aabb.contains(&Point3::new(-21, -11, -6)));
+
+    assert_eq!(aabb.translate(&Vec3::new(1, 2, 3)),
+        Aabb3::new(&Point3::new(-19, 32, 8), &Point3::new(11, -8, -2)));
 }