Translate and scale methods for AABB

src/cgmath/aabb.rs

@@ -53,9 +53,19 @@ pub trait Aabb
     }
 
     // Returns a new AABB that has its points translated by the given vector.
-    fn translate(&self, v: &V) -> Self {
+    fn add_v(&self, v: &V) -> Self {
         Aabb::new(&self.min().add_v(v), &self.max().add_v(v))
     }
+
+    fn mul_s(&self, s: S) -> Self {
+        Aabb::new(&self.min().mul_s(s.clone()), &self.max().mul_s(s.clone()))
+    }
+
+    fn mul_v(&self, v: &V) -> Self {
+        let mn : P = Point::from_vec(&self.min().to_vec().mul_v(v));
+        let mx : P = Point::from_vec(&self.max().to_vec().mul_v(v));
+        Aabb::new(&mn, &mx)
+    }
 }
 
 #[deriving(Clone, Eq)]

src/test/aabb.rs

@@ -36,6 +36,12 @@ fn test_aabb() {
     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)),
+    assert_eq!(aabb.add_v(&Vec3::new(1, 2, 3)),
         Aabb3::new(&Point3::new(-19, 32, 8), &Point3::new(11, -8, -2)));
+
+    assert_eq!(aabb.mul_s(2),
+        Aabb3::new(&Point3::new(-40, -20, -10), &Point3::new(20, 60, 10)));
+
+    assert_eq!(aabb.mul_v(&Vec3::new(1, 2, 3)),
+        Aabb3::new(&Point3::new(-20, -20, -15), &Point3::new(10, 60, 15)));
 }