diff --git a/raytracing/src/matrix.cpp b/raytracing/src/matrix.cpp
index 1cf946a..9690e13 100644
--- a/raytracing/src/matrix.cpp
+++ b/raytracing/src/matrix.cpp
@@ -397,7 +397,7 @@ Matrix Matrix::shearing(double a_xy, double a_xz, double a_yx, double a_yz, doub
 
 /* ------------------------------------------------------------------------- */
 
-Matrix Matrix::view_transform(Tuple a_from, Tuple a_to, Tuple an_up)
+Matrix Matrix::view_transform(const Tuple &a_from, const Tuple &a_to, const Tuple &an_up)
 {
     Tuple the_forward       = (a_to - a_from).normalize();
     Tuple the_up_normalized = an_up.normalize();
diff --git a/raytracing/src/matrix.h b/raytracing/src/matrix.h
index 71bb8ce..5f7c924 100644
--- a/raytracing/src/matrix.h
+++ b/raytracing/src/matrix.h
@@ -77,7 +77,7 @@ namespace Raytracer
         static Matrix rotation_y(double a_radians);
         static Matrix rotation_z(double a_radians);
         static Matrix shearing(double a_xy, double a_xz, double a_yx, double a_yz, double a_zx, double a_zy);
-        static Matrix view_transform(Tuple a_from, Tuple a_to, Tuple an_up);
+        static Matrix view_transform(const Tuple &a_from, const Tuple &a_to, const Tuple &an_up);
 
     private:
         bool validate_dimensions(const std::initializer_list<std::initializer_list<double>> &a_values) const;