From 40ddb057973dae4663d5c77db665f90baee334b0 Mon Sep 17 00:00:00 2001
From: nsmryan <nsmryan@gmail.com>
Date: Sat, 29 Sep 2018 13:03:37 -0400
Subject: [PATCH] added impl-nalgebra feature

---
 Cargo.toml |  5 +++++
 src/lib.rs | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index 42cb008..956a0cf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,6 +22,11 @@ default = ["std", "impl-cgmath"]
 serialization = ["serde", "serde_derive"]
 std = []
 impl-cgmath = ["cgmath"]
+impl-nalgebra = ["nalgebra"]
+
+[dependencies.nalgebra]
+version = "0.16"
+optional = true
 
 [dependencies.cgmath]
 version = "0.16"
diff --git a/src/lib.rs b/src/lib.rs
index b2d3485..0f7b09c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -98,11 +98,15 @@
 
 #[cfg(feature = "impl-cgmath")] extern crate cgmath;
 
+#[cfg(feature = "impl-nalgebra")] extern crate nalgebra;
+
 #[cfg(feature = "serialization")] extern crate serde;
 #[cfg(feature = "serialization")] #[macro_use] extern crate serde_derive;
 
 #[cfg(feature = "impl-cgmath")] use cgmath::{InnerSpace, Quaternion, Vector2, Vector3, Vector4};
 
+#[cfg(feature = "impl-nalgera")] use nalgera::{Point, Vector};
+
 #[cfg(feature = "std")] use std::cmp::Ordering;
 #[cfg(feature = "std")] use std::f32::consts;
 #[cfg(feature = "std")] use std::ops::{Add, Div, Mul, Sub};
@@ -385,6 +389,20 @@ impl Interpolate for Quaternion<f32> {
   }
 }
 
+#[cfg(feature = "impl-nalgebra")]
+impl<T : Interpolate > Interpolate for Point<T> {
+    fn lerp(a: Self, b: Self, t: f32) -> Self {
+        a.lerp(b, t)
+    }
+}
+
+#[cfg(feature = "impl-nalgebra")]
+impl<T : Interpolate > Interpolate for Vector<T> {
+    fn lerp(a: Self, b: Self, t: f32) -> Self {
+        a.lerp(b, t)
+    }
+}
+
 // Default implementation of Interpolate::cubic_hermit.
 pub(crate) fn cubic_hermite<T>(x: (T, f32), a: (T, f32), b: (T, f32), y: (T, f32), t: f32) -> T
     where T: Copy + Add<Output = T> + Sub<Output = T> + Mul<f32, Output = T> + Div<f32, Output = T> {