Noise: First pass of refactoring

Former-commit-id: c71e76f337fd3fc1793f105d189f3ceecb80e537 [formerly 5ac3cfc15257e407cb388bcedb1a96be5381ef67]
Former-commit-id: c97fb23feb0e4bd4d6965e83d91a38cec1382e48

include/Nazara/Math/Algorithm.hpp

@@ -1,3 +1,4 @@
+
 // Copyright (C) 2015 Jérôme Leclercq
 // This file is part of the "Nazara Engine - Mathematics module"
 // For conditions of distribution and use, see copyright notice in Config.hpp
@@ -28,6 +29,10 @@
 #define M_SQRT3 1.7320508075688772935274463
 #endif
 
+#ifndef M_SQRT5
+#define M_SQRT5 2.23606797749979
+#endif
+
 namespace Nz
 {
 	template<typename T> /*constexpr*/ T Approach(T value, T objective, T increment);