Renamed Vector[i]::[Squared]Length[f] to Get[*]

Also added length pointer parameter to Vector[i]::GetNormal


Former-commit-id: 345ebd14bda9f5e0a3843e7603eb7a1a39667db1

include/Nazara/Math/Vector4.hpp

@@ -26,6 +26,8 @@ template<typename T> class NzVector4
 
 		T DotProduct(const NzVector4& vec) const;
 
+		NzVector4 GetNormal(T* length = nullptr) const;
+
 		NzVector4& MakeUnitX();
 		NzVector4& MakeUnitY();
 		NzVector4& MakeUnitZ();