From 7884f20ea79b40e0d3a04587d69ff8fee7332a98 Mon Sep 17 00:00:00 2001
From: sebcrozet <developer@crozet.re>
Date: Sat, 22 Sep 2018 15:39:21 +0200
Subject: [PATCH] Add quaternion dot product.

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

diff --git a/src/geometry/quaternion.rs b/src/geometry/quaternion.rs
index 375c6b57..eafb0de6 100644
--- a/src/geometry/quaternion.rs
+++ b/src/geometry/quaternion.rs
@@ -202,6 +202,12 @@ impl<N: Real> Quaternion<N> {
         self.coords.norm_squared()
     }
 
+    /// The dot product of two quaternions.
+    #[inline]
+    pub fn dot(&self, rhs: &Self) -> N {
+        self.coords.dot(&rhs.coords)
+    }
+
     /// The polar decomposition of this quaternion.
     ///
     /// Returns, from left to right: the quaternion norm, the half rotation angle, the rotation