Move rotation module into transform module

This decouples these types from the more general math types. It also makes more sense, because rotations are indeed a type of transformation.

src/math/math.rs

@@ -31,10 +31,6 @@ pub use self::point::Point;
 pub use self::point::{Point2, AsPoint2};
 pub use self::point::{Point3, AsPoint3};
 pub use self::ray::{Ray2, Ray3};
-pub use self::rotation::Rotation;
-pub use self::rotation::{Euler, ToEuler};
-pub use self::rotation::{AxisAngle, ToAxisAngle};
-pub use self::rotation::{AngleX, AngleY, AngleZ};
 
 pub mod mat;
 pub mod quat;
@@ -43,7 +39,6 @@ pub mod vec;
 pub mod plane;
 pub mod point;
 pub mod ray;
-pub mod rotation;
 
 pub trait Dimensioned<T,Slice> {
     pub fn index<'a>(&'a self, i: uint) -> &'a T;

src/transform/rotation.rs

@@ -28,12 +28,7 @@
 
 use std::cast;
 
-use math::{Dimensioned, SwapComponents};
-use math::{Mat, NumMat, FloatMat};
-use math::{Mat3, ToMat3};
-use math::{Mat4, ToMat4};
-use math::{Quat, ToQuat};
-use math::{Vec3, ToVec3, AsVec3};
+use math::*;
 
 use math::{Point3, Ray3};
 
@@ -327,10 +322,8 @@ impl<T:Float> ToMat4<T> for AxisAngle<T> {
 
 #[cfg(test)]
 mod axis_angle_tests {
-    use math::mat::*;
-    use math::quat::*;
-    use math::rotation::*;
-    use math::vec::*;
+    use math::*;
+    use transform::*;
 
     #[test]
     fn test_to_quat() {

src/transform/transform.rs

@@ -14,10 +14,15 @@
 // limitations under the License.
 
 pub use self::projection::{Projection, Perspective, PerspectiveFOV, Ortho};
+pub use self::rotation::Rotation;
+pub use self::rotation::{Euler, ToEuler};
+pub use self::rotation::{AxisAngle, ToAxisAngle};
+pub use self::rotation::{AngleX, AngleY, AngleZ};
 
 use math::{Vec3, Quat};
 
 pub mod projection;
+pub mod rotation;
 
 pub trait Transform<T> {}