Implement Matrix3x3::ToEulerAngle and Matrix3x3::ctor(EulerAngle)

include/J3ML/LinearAlgebra/Matrix3x3.h

@@ -5,6 +5,7 @@
 #include <J3ML/LinearAlgebra/Vector2.h>
 #include <J3ML/LinearAlgebra/Vector3.h>
 #include <J3ML/LinearAlgebra/Quaternion.h>
+#include <J3ML/LinearAlgebra/EulerAngle.h>
 #include <J3ML/Algorithm/RNG.h>
 
 using namespace J3ML::Algorithm;
@@ -61,6 +62,9 @@ namespace J3ML::LinearAlgebra {
         Matrix3x3(const Vector3& col0, const Vector3& col1, const Vector3& col2);
         /// Constructs this matrix3x3 from the given quaternion.
         explicit Matrix3x3(const Quaternion& orientation);
+        /// Constructs this matrix3x3 from the given euler angle.
+        explicit Matrix3x3(const EulerAngle& orientation);
+
         /// Constructs this Matrix3x3 from a pointer to an array of floats.
         explicit Matrix3x3(const float *data);
         /// Creates a new Matrix3x3 that rotates about one of the principal axes by the given angle.
@@ -243,6 +247,8 @@ namespace J3ML::LinearAlgebra {
         /// matrix, and there is scaling ,shearing, or mirroring in this matrix)
         bool TryConvertToQuat(Quaternion& q) const;
 
+        /// Converts this rotation matrix to an Euler Angle.
+        [[nodiscard]] EulerAngle ToEulerAngle() const;
 
         /// Returns the main diagonal.
         /// The main diagonal consists of the elements at m[0][0], m[1][1], m[2][2]