Added FBM 3D & 4D and HybridMultiFractal 2D + cleaned code

this commit will change the scale of values produced by fbm2d. This will
probably not happen again. As a consequence, fbm values will always be
constrained between -1 and 1, but do not perfectly stick to that scale.
There is no easy solution, if the user wants the best dynamic between -1
and 1, he should adjust manually the value by multiplying by a gain slightly superior to 1.


Former-commit-id: ebdba9e9f4bbb972abe355c07ec9f8bce42329b9

include/Nazara/Noise/HybridMultifractal2D.hpp

@@ -0,0 +1,29 @@
+// Copyright (C) 2012 Rémi Bèges
+// This file is part of the "Nazara Engine".
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef HYBRIDMULTIFRACTAL2D_HPP
+#define HYBRIDMULTIFRACTAL2D_HPP
+
+#include <Nazara/Prerequesites.hpp>
+#include <Nazara/Noise/ComplexNoiseBase.hpp>
+#include <Nazara/Noise/Abstract2DNoise.hpp>
+
+class NAZARA_API NzHybridMultiFractal2D : public NzAbstract2DNoise, public NzComplexNoiseBase
+{
+    public:
+        NzHybridMultiFractal2D(nzNoises source, int seed);
+        float GetValue(float x, float y, float resolution);
+        ~NzHybridMultiFractal2D();
+    protected:
+    private:
+        NzAbstract2DNoise* m_source;
+        float m_value;
+        float m_remainder;
+        nzNoises m_noiseType;
+};
+
+#endif // HYBRIDMULTIFRACTAL2D_HPP
+