From 053586c8e229b675451f0c9218b0425587fa4d7d Mon Sep 17 00:00:00 2001
From: Brendan Zabarauskas <bjzaba@yahoo.com.au>
Date: Wed, 10 Jul 2013 14:18:44 +1000
Subject: [PATCH] Add point conversion methods for vec2 and vec3 types

---
 src/core/vec.rs | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/src/core/vec.rs b/src/core/vec.rs
index 575bd34..9f15a71 100644
--- a/src/core/vec.rs
+++ b/src/core/vec.rs
@@ -13,7 +13,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#[cfg(geom)]
+use std::cast;
+
 use core::Dimensional;
+#[cfg(geom)]
+use geom::{Point2, Point3};
 
 #[path = "../num_macros.rs"]
 mod num_macros;
@@ -56,6 +61,24 @@ impl<T> Vec2<T> {
     }
 }
 
+#[cfg(geom)]
+impl<T> Vec2<T> {
+    #[inline]
+    pub fn from_point(point: Point2<T>) -> Vec2<T> {
+        unsafe { cast::transmute(point) }
+    }
+
+    #[inline]
+    pub fn as_point<'a>(&'a self) -> &'a Point2<T> {
+        unsafe { cast::transmute(self) }
+    }
+
+    #[inline]
+    pub fn as_mut_point<'a>(&'a mut self) -> &'a mut Point2<T> {
+        unsafe { cast::transmute(self) }
+    }
+}
+
 impl<T:Clone> Vec2<T> {
     #[inline]
     pub fn from_value(value: T) -> Vec2<T> {
@@ -561,6 +584,24 @@ impl<T> Vec3<T> {
     }
 }
 
+#[cfg(geom)]
+impl<T> Vec3<T> {
+    #[inline]
+    pub fn from_point(point: Point3<T>) -> Vec3<T> {
+        unsafe { cast::transmute(point) }
+    }
+
+    #[inline]
+    pub fn as_point<'a>(&'a self) -> &'a Point3<T> {
+        unsafe { cast::transmute(self) }
+    }
+
+    #[inline]
+    pub fn as_mut_point<'a>(&'a mut self) -> &'a mut Point3<T> {
+        unsafe { cast::transmute(self) }
+    }
+}
+
 impl<T:Clone> Vec3<T> {
     #[inline]
     pub fn from_value(value: T) -> Vec3<T> {