Separate implementation

include/J3ML/LinearAlgebra/Quaternion.h

@@ -61,21 +61,7 @@ namespace J3ML::LinearAlgebra
 
         float GetAngle() const;
 
-        EulerAngle ToEulerAngle() const
-        {
-            // roll (x-axis rotation)
-            double sinr_cosp = 2 * (w * x + y * z);
-            double cosr_cosp = 1 - 2 * (x * x + y * y);
-
-            // pitch (y-axis rotation)
-            double sinp = std::sqrt(1 + 2 * (w * y - x * z));
-            double
-
-            return {
-                .roll = std::atan2(sinr_cosp, cosr_cosp),
-                .pitch =
-            };
-        }
+        EulerAngle ToEulerAngle() const;
 
 
         Matrix3x3 ToMatrix3x3() const;

src/J3ML/LinearAlgebra/Quaternion.cpp

@@ -232,4 +232,8 @@ namespace J3ML::LinearAlgebra {
         z = angle.axis.z * s;
         w = std::cos(angle.angle / 2);
     }
+
+    EulerAngle Quaternion::ToEulerAngle() const {
+        return EulerAngle(*this);
+    }
 }