From 4580cb3aca1e88dfb45bc7e8c8d3623746861025 Mon Sep 17 00:00:00 2001
From: Osspial <osspial@gmail.com>
Date: Wed, 9 Aug 2017 14:12:51 -0400
Subject: [PATCH 1/3] Add Sub and SubAssign <Vector> for all Points

---
 src/point.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/point.rs b/src/point.rs
index c659293..44470f7 100644
--- a/src/point.rs
+++ b/src/point.rs
@@ -198,9 +198,15 @@ macro_rules! impl_point {
         impl_operator!(<S: BaseNum> Add<$VectorN<S> > for $PointN<S> {
             fn add(lhs, rhs) -> $PointN<S> { $PointN::new($(lhs.$field + rhs.$field),+) }
         });
+        impl_operator!(<S: BaseNum> Sub<$VectorN<S>> for $PointN<S> {
+            fn sub(lhs, rhs) -> $PointN<S> { $PointN::new($(lhs.$field - rhs.$field),+) }
+        });
         impl_assignment_operator!(<S: BaseNum> AddAssign<$VectorN<S> > for $PointN<S> {
             fn add_assign(&mut self, vector) { $(self.$field += vector.$field);+ }
         });
+        impl_assignment_operator!(<S: BaseNum> SubAssign<$VectorN<S>> for $PointN<S> {
+            fn sub_assign(&mut self, vector) { $(self.$field += vector.$field);+ }
+        });
 
         impl_operator!(<S: BaseNum> Sub<$PointN<S> > for $PointN<S> {
             fn sub(lhs, rhs) -> $VectorN<S> { $VectorN::new($(lhs.$field - rhs.$field),+) }

From b2b715c020de1046034c8882b3846b12a5ed03c7 Mon Sep 17 00:00:00 2001
From: Osspial <osspial@gmail.com>
Date: Thu, 10 Aug 2017 18:50:11 -0400
Subject: [PATCH 2/3] Add vector subtraction bound to EuclideanSpace

---
 src/structure.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/structure.rs b/src/structure.rs
index 6c36cc0..1c77c3a 100644
--- a/src/structure.rs
+++ b/src/structure.rs
@@ -310,6 +310,7 @@ pub trait EuclideanSpace: Copy + Clone where
     Self: Array<Element = <Self as EuclideanSpace>::Scalar>,
 
     Self: Add<<Self as EuclideanSpace>::Diff, Output = Self>,
+    Self: Sub<<Self as EuclideanSpace>::Diff, Output = Self>,
     Self: Sub<Self, Output = <Self as EuclideanSpace>::Diff>,
 
     Self: Mul<<Self as EuclideanSpace>::Scalar, Output = Self>,

From 0a9c51da820710753ffd31216d61a59729113e74 Mon Sep 17 00:00:00 2001
From: Osspial <osspial@gmail.com>
Date: Fri, 6 Oct 2017 00:20:38 -0400
Subject: [PATCH 3/3] Fix incorrect operator in sub_assign impl

---
 src/point.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/point.rs b/src/point.rs
index 44470f7..7ace4cb 100644
--- a/src/point.rs
+++ b/src/point.rs
@@ -205,7 +205,7 @@ macro_rules! impl_point {
             fn add_assign(&mut self, vector) { $(self.$field += vector.$field);+ }
         });
         impl_assignment_operator!(<S: BaseNum> SubAssign<$VectorN<S>> for $PointN<S> {
-            fn sub_assign(&mut self, vector) { $(self.$field += vector.$field);+ }
+            fn sub_assign(&mut self, vector) { $(self.$field -= vector.$field);+ }
         });
 
         impl_operator!(<S: BaseNum> Sub<$PointN<S> > for $PointN<S> {