Added magnitude and normalization

Refactored  `types.h` to `Vectors.h`

CMakeLists.txt

@@ -18,7 +18,7 @@ add_executable(tests_opengl
         src/DataHandling/Texture.h
         src/DataHandling/Model3D.cpp
         src/DataHandling/Model3D.h
-        src/types.h
+        src/Vectors.h
         src/KeyStateManager.cpp
         src/KeyStateManager.h)
 

src/DataHandling/Model3D.h

@@ -10,7 +10,7 @@
 #include <iostream>
 #include "GL/glut.h"
 
-#include "types.h"
+#include "Vectors.h"
 #include "Texture.h"
 
 class Model3D {

src/KeyStateManager.h

@@ -8,7 +8,7 @@
 #include <map>
 #include <GL/glut.h>
 
-#include "types.h"
+#include "Vectors.h"
 
 
 /// Handles the key and mouse events from glut and keep their status up to date.

src/Vectors.h

@@ -2,10 +2,11 @@
 // Created by trotfunky on 30/09/2019.
 //
 
-#ifndef TESTS_OPENGL_TYPES_H
-#define TESTS_OPENGL_TYPES_H
+#ifndef TESTS_OPENGL_VECTORS_H
+#define TESTS_OPENGL_VECTORS_H
 
 #include <fstream>
+#include <cmath>
 
 /// Group of coordinates with the input operator overloaded.
 /// \tparam T Content of the vector
@@ -15,6 +16,32 @@ struct CoordinatesVector
 {
     T coordinates[N];
 
+    /// Computes the euclidean norm of the vector.
+    /// \return The magnitude.
+    double magnitude()
+    {
+        // TODO : Save magnitude if the vector has not been modified.
+        double sum_of_squares = 0;
+        for (unsigned int i = 0;i<N;i++)
+        {
+            sum_of_squares += coordinates[i]*coordinates[i];
+        }
+        return sqrt(sum_of_squares);
+    }
+
+    // Use SFINAE to allow normalization of floating point
+    /// Normalizes the vector using its euclidean norm.
+    /// \return Nothing, the vector is normalized in-place.
+    typename std::enable_if<std::is_floating_point<T>::value,void>::type
+    normalize()
+    {
+        double norm = magnitude();
+        for (unsigned int i = 0;i<N;i++)
+        {
+            coordinates[i] /= norm;
+        }
+    }
+
     // Use SFINAE to declare the function if and only if the type is arithmetic
     template <typename Scalar>
     typename std::enable_if<std::is_arithmetic<Scalar>::value,CoordinatesVector<T,N>>::type
@@ -67,6 +94,7 @@ struct CoordinatesVector
     }
 };
 
+// Define some specializations to add x,y,z references to the coordinates.
 
 template <typename T>
 struct Vec2 : public CoordinatesVector<T,2>
@@ -133,4 +161,4 @@ typedef Vec3<int> Vec3i;
 typedef Vec3<float> Vec3f;
 
 
-#endif //TESTS_OPENGL_TYPES_H
+#endif //TESTS_OPENGL_VECTORS_H