Added Matrix4::Identity(), Added Lerp (scalar.h)

include/matrix4.h

@@ -107,6 +107,7 @@ public:
   static Matrix4 Translation(const Vector3 &v);
   static Matrix4 Rotation(const Vector3 &v);
   static Matrix4 Scaling(const Vector3 &v);
+  static Matrix4 Identity();
 };
 static_assert(std::is_pod<Matrix4>::value, "kraken::Matrix4 must be a POD type.");
 

include/scalar.h

@@ -35,6 +35,7 @@
 namespace kraken {
 
   float SmoothStep(float a, float b, float t);
+  float Lerp(float a, float b, float t);
 
 }; // namespace kraken