1 files changed, 1028 insertions, 0 deletions

diff --git a/src/Noise/Noise.cpp b/src/Noise/Noise.cpp
new file mode 100644
index 000000000..0249ab6c1
--- /dev/null
+++ b/src/Noise/Noise.cpp
@@ -0,0 +1,1028 @@
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "Noise.h"
+
+#define FAST_FLOOR(x) (((x) < 0) ? (((int)x) - 1) : ((int)x))
+
+
+
+
+
+#if 0
+/** cImprovedPerlin noise test suite:
+- Generate a rather large 2D and 3D noise array and output it to a file
+- Compare performance of cCubicNoise and cImprovedNoise, both in single-value and 3D-array usages */
+static class cImprovedPerlinNoiseTest
+{
+public:
+	cImprovedPerlinNoiseTest(void)
+	{
+		printf("Performing Improved Perlin Noise tests...\n");
+		TestImage();
+		TestSpeed();
+		TestSpeedArr();
+		printf("Improved Perlin Noise tests complete.\n");
+	}
+
+
+	/** Tests the noise by generating 2D and 3D images and dumping them to files. */
+	void TestImage(void)
+	{
+		static const int SIZE_X = 256;
+		static const int SIZE_Y = 256;
+		static const int SIZE_Z = 16;
+
+		cImprovedNoise noise(1);
+		std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y * SIZE_Z]);
+		noise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, 0, 14, 0, 14, 0, 14);
+		Debug3DNoise(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, "ImprovedPerlinNoiseTest3D", 128);
+		noise.Generate2D(arr.get(), SIZE_X, SIZE_Y, 0, 14, 15, 28);
+		Debug2DNoise(arr.get(), SIZE_X, SIZE_Y, "ImprovedPerlinNoiseTest2D", 128);
+	}
+
+
+	/** Tests the speeds of cImprovedPerlin and cCubicNoise when generating individual values. */
+	void TestSpeed(void)
+	{
+		cImprovedNoise improvedNoise(1);
+		cNoise         noise(1);
+		cTimer timer;
+
+		// Measure the improvedNoise:
+		NOISE_DATATYPE sum = 0;
+		long long start = timer.GetNowTime();
+		for (int i = 0; i < 100000000; i++)
+		{
+			sum += improvedNoise.GetValueAt(i, 0, -i);
+		}
+		long long finish = timer.GetNowTime();
+		printf("cImprovedNoise took %.2f seconds; total is %f.\n", static_cast<float>(finish - start) / 1000.0f, sum);
+
+		// Measure the cubicNoise:
+		sum = 0;
+		start = timer.GetNowTime();
+		for (int i = 0; i < 100000000; i++)
+		{
+			sum += noise.IntNoise3D(i, 0, -i);
+		}
+		finish = timer.GetNowTime();
+		printf("cCubicNoise took %.2f seconds; total is %f.\n", static_cast<float>(finish - start) / 1000.0f, sum);
+	}
+
+
+	/** Tests the speeds of cImprovedPerlin and cCubicNoise when generating arrays. */
+	void TestSpeedArr(void)
+	{
+		static const int SIZE_X = 256;
+		static const int SIZE_Y = 256;
+		static const int SIZE_Z = 16;
+
+		std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y * SIZE_Z]);
+		cTimer timer;
+		cImprovedNoise improvedNoise(1);
+		cCubicNoise    cubicNoise(1);
+
+		// Measure the improvedNoise:
+		long long start = timer.GetNowTime();
+		for (int i = 0; i < 40; i++)
+		{
+			improvedNoise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, 0, 14, 0, 14, 0, 14);
+		}
+		long long finish = timer.GetNowTime();
+		printf("cImprovedNoise(arr) took %.2f seconds.\n", static_cast<float>(finish - start) / 1000.0f);
+
+		// Measure the cubicNoise:
+		start = timer.GetNowTime();
+		for (int i = 0; i < 40; i++)
+		{
+			cubicNoise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, 0, 14, 0, 14, 0, 14);
+		}
+		finish = timer.GetNowTime();
+		printf("cCubicNoise(arr) took %.2f seconds.\n", static_cast<float>(finish - start) / 1000.0f);
+	}
+} g_Test;
+
+#endif
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Globals:
+
+void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff)
+{
+	const int BUF_SIZE = 512;
+	ASSERT(a_SizeX <= BUF_SIZE);  // Just stretch it, if needed
+	
+	// Save in XY cuts:
+	cFile f1;
+	if (f1.Open(Printf("%s_XY (%d).grab", a_FileNameBase.c_str(), a_SizeX), cFile::fmWrite))
+	{
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int y = 0; y < a_SizeY; y++)
+			{
+				int idx = y * a_SizeX + z * a_SizeX * a_SizeY;
+				unsigned char buf[BUF_SIZE];
+				for (int x = 0; x < a_SizeX; x++)
+				{
+					buf[x] = static_cast<unsigned char>(Clamp((int)(128 + a_Coeff * a_Noise[idx++]), 0, 255));
+				}
+				f1.Write(buf, a_SizeX);
+			}  // for y
+			unsigned char buf[BUF_SIZE];
+			memset(buf, 0, a_SizeX);
+			f1.Write(buf, a_SizeX);
+		}  // for z
+	}  // if (XY file open)
+
+	cFile f2;
+	if (f2.Open(Printf("%s_XZ (%d).grab", a_FileNameBase.c_str(), a_SizeX), cFile::fmWrite))
+	{
+		for (int y = 0; y < a_SizeY; y++)
+		{
+			for (int z = 0; z < a_SizeZ; z++)
+			{
+				int idx = y * a_SizeX + z * a_SizeX * a_SizeY;
+				unsigned char buf[BUF_SIZE];
+				for (int x = 0; x < a_SizeX; x++)
+				{
+					buf[x] = static_cast<unsigned char>(Clamp((int)(128 + a_Coeff * a_Noise[idx++]), 0, 255));
+				}
+				f2.Write(buf, a_SizeX);
+			}  // for z
+			unsigned char buf[BUF_SIZE];
+			memset(buf, 0, a_SizeX);
+			f2.Write(buf, a_SizeX);
+		}  // for y
+	}  // if (XZ file open)
+}
+
+
+
+
+
+void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff)
+{
+	const int BUF_SIZE = 512;
+	ASSERT(a_SizeX <= BUF_SIZE);  // Just stretch it, if needed
+	
+	cFile f1;
+	if (f1.Open(Printf("%s (%d).grab", a_FileNameBase.c_str(), a_SizeX), cFile::fmWrite))
+	{
+		for (int y = 0; y < a_SizeY; y++)
+		{
+			int idx = y * a_SizeX;
+			unsigned char buf[BUF_SIZE];
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				buf[x] = static_cast<unsigned char>(Clamp((int)(128 + a_Coeff * a_Noise[idx++]), 0, 255));
+			}
+			f1.Write(buf, a_SizeX);
+		}  // for y
+	}  // if (file open)
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cCubicCell2D:
+
+class cCubicCell2D
+{
+public:
+	cCubicCell2D(
+		const cNoise & a_Noise,    ///< Noise to use for generating the random values
+		NOISE_DATATYPE * a_Array,  ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY,  ///< Count of the array, in each direction
+		const NOISE_DATATYPE * a_FracX,  ///< Pointer to the array that stores the X fractional values
+		const NOISE_DATATYPE * a_FracY   ///< Pointer to the attay that stores the Y fractional values
+	);
+	
+	/// Uses current m_WorkRnds[] to generate part of the array
+	void Generate(
+		int a_FromX, int a_ToX,
+		int a_FromY, int a_ToY
+	);
+	
+	/// Initializes m_WorkRnds[] with the specified Floor values
+	void InitWorkRnds(int a_FloorX, int a_FloorY);
+	
+	/// Updates m_WorkRnds[] for the new Floor values.
+	void Move(int a_NewFloorX, int a_NewFloorY);
+
+protected:
+	typedef NOISE_DATATYPE Workspace[4][4];
+	
+	const cNoise & m_Noise;
+	
+	Workspace * m_WorkRnds;  ///< The current random values; points to either m_Workspace1 or m_Workspace2 (doublebuffering)
+	Workspace m_Workspace1;  ///< Buffer 1 for workspace doublebuffering, used in Move()
+	Workspace m_Workspace2;  ///< Buffer 2 for workspace doublebuffering, used in Move()
+	int m_CurFloorX;
+	int m_CurFloorY;
+	
+	NOISE_DATATYPE * m_Array;
+	int m_SizeX, m_SizeY;
+	const NOISE_DATATYPE * m_FracX;
+	const NOISE_DATATYPE * m_FracY;
+} ;
+
+
+
+
+
+cCubicCell2D::cCubicCell2D(
+	const cNoise & a_Noise,    ///< Noise to use for generating the random values
+	NOISE_DATATYPE * a_Array,  ///< Array to generate into [x + a_SizeX * y]
+	int a_SizeX, int a_SizeY,  ///< Count of the array, in each direction
+	const NOISE_DATATYPE * a_FracX,  ///< Pointer to the array that stores the X fractional values
+	const NOISE_DATATYPE * a_FracY   ///< Pointer to the attay that stores the Y fractional values
+) :
+	m_Noise(a_Noise),
+	m_WorkRnds(&m_Workspace1),
+	m_CurFloorX(0),
+	m_CurFloorY(0),
+	m_Array(a_Array),
+	m_SizeX(a_SizeX),
+	m_SizeY(a_SizeY),
+	m_FracX(a_FracX),
+	m_FracY(a_FracY)
+{
+}
+
+
+
+
+
+void cCubicCell2D::Generate(
+	int a_FromX, int a_ToX,
+	int a_FromY, int a_ToY
+)
+{
+	for (int y = a_FromY; y < a_ToY; y++)
+	{
+		NOISE_DATATYPE Interp[4];
+		NOISE_DATATYPE FracY = m_FracY[y];
+		Interp[0] = cNoise::CubicInterpolate((*m_WorkRnds)[0][0], (*m_WorkRnds)[0][1], (*m_WorkRnds)[0][2], (*m_WorkRnds)[0][3], FracY);
+		Interp[1] = cNoise::CubicInterpolate((*m_WorkRnds)[1][0], (*m_WorkRnds)[1][1], (*m_WorkRnds)[1][2], (*m_WorkRnds)[1][3], FracY);
+		Interp[2] = cNoise::CubicInterpolate((*m_WorkRnds)[2][0], (*m_WorkRnds)[2][1], (*m_WorkRnds)[2][2], (*m_WorkRnds)[2][3], FracY);
+		Interp[3] = cNoise::CubicInterpolate((*m_WorkRnds)[3][0], (*m_WorkRnds)[3][1], (*m_WorkRnds)[3][2], (*m_WorkRnds)[3][3], FracY);
+		int idx = y * m_SizeX + a_FromX;
+		for (int x = a_FromX; x < a_ToX; x++)
+		{
+			m_Array[idx++] = cNoise::CubicInterpolate(Interp[0], Interp[1], Interp[2], Interp[3], m_FracX[x]);
+		}  // for x
+	}  // for y
+}
+
+
+
+
+
+void cCubicCell2D::InitWorkRnds(int a_FloorX, int a_FloorY)
+{
+	m_CurFloorX = a_FloorX;
+	m_CurFloorY = a_FloorY;
+	for (int x = 0; x < 4; x++)
+	{
+		int cx = a_FloorX + x - 1;
+		for (int y = 0; y < 4; y++)
+		{
+			int cy = a_FloorY + y - 1;
+			(*m_WorkRnds)[x][y] = (NOISE_DATATYPE)m_Noise.IntNoise2D(cx, cy);
+		}
+	}
+}
+
+
+
+
+
+void cCubicCell2D::Move(int a_NewFloorX, int a_NewFloorY)
+{
+	// Swap the doublebuffer:
+	int OldFloorX = m_CurFloorX;
+	int OldFloorY = m_CurFloorY;
+	Workspace * OldWorkRnds = m_WorkRnds;
+	m_WorkRnds = (m_WorkRnds == &m_Workspace1) ? &m_Workspace2 : &m_Workspace1;
+	
+	// Reuse as much of the old workspace as possible:
+	int DiffX = OldFloorX - a_NewFloorX;
+	int DiffY = OldFloorY - a_NewFloorY;
+	for (int x = 0; x < 4; x++)
+	{
+		int cx = a_NewFloorX + x - 1;
+		int OldX = x - DiffX;  // Where would this X be in the old grid?
+		for (int y = 0; y < 4; y++)
+		{
+			int cy = a_NewFloorY + y - 1;
+			int OldY = y - DiffY;  // Where would this Y be in the old grid?
+			if ((OldX >= 0) && (OldX < 4) && (OldY >= 0) && (OldY < 4))
+			{
+				(*m_WorkRnds)[x][y] = (*OldWorkRnds)[OldX][OldY];
+			}
+			else
+			{
+				(*m_WorkRnds)[x][y] = (NOISE_DATATYPE)m_Noise.IntNoise2D(cx, cy);
+			}
+		}
+	}
+	m_CurFloorX = a_NewFloorX;
+	m_CurFloorY = a_NewFloorY;
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cCubicCell3D:
+
+class cCubicCell3D
+{
+public:
+	cCubicCell3D(
+		const cNoise & a_Noise,                 ///< Noise to use for generating the random values
+		NOISE_DATATYPE * a_Array,               ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY, int a_SizeZ,  ///< Count of the array, in each direction
+		const NOISE_DATATYPE * a_FracX,         ///< Pointer to the array that stores the X fractional values
+		const NOISE_DATATYPE * a_FracY,         ///< Pointer to the attay that stores the Y fractional values
+		const NOISE_DATATYPE * a_FracZ          ///< Pointer to the array that stores the Z fractional values
+	);
+	
+	/// Uses current m_WorkRnds[] to generate part of the array
+	void Generate(
+		int a_FromX, int a_ToX,
+		int a_FromY, int a_ToY,
+		int a_FromZ, int a_ToZ
+	);
+	
+	/// Initializes m_WorkRnds[] with the specified Floor values
+	void InitWorkRnds(int a_FloorX, int a_FloorY, int a_FloorZ);
+	
+	/// Updates m_WorkRnds[] for the new Floor values.
+	void Move(int a_NewFloorX, int a_NewFloorY, int a_NewFloorZ);
+
+protected:
+	typedef NOISE_DATATYPE Workspace[4][4][4];
+	
+	const cNoise & m_Noise;
+	
+	Workspace * m_WorkRnds;  ///< The current random values; points to either m_Workspace1 or m_Workspace2 (doublebuffering)
+	Workspace m_Workspace1;  ///< Buffer 1 for workspace doublebuffering, used in Move()
+	Workspace m_Workspace2;  ///< Buffer 2 for workspace doublebuffering, used in Move()
+	int m_CurFloorX;
+	int m_CurFloorY;
+	int m_CurFloorZ;
+	
+	NOISE_DATATYPE * m_Array;
+	int m_SizeX, m_SizeY, m_SizeZ;
+	const NOISE_DATATYPE * m_FracX;
+	const NOISE_DATATYPE * m_FracY;
+	const NOISE_DATATYPE * m_FracZ;
+} ;
+
+
+
+
+
+cCubicCell3D::cCubicCell3D(
+	const cNoise & a_Noise,                 ///< Noise to use for generating the random values
+	NOISE_DATATYPE * a_Array,               ///< Array to generate into [x + a_SizeX * y]
+	int a_SizeX, int a_SizeY, int a_SizeZ,  ///< Count of the array, in each direction
+	const NOISE_DATATYPE * a_FracX,         ///< Pointer to the array that stores the X fractional values
+	const NOISE_DATATYPE * a_FracY,         ///< Pointer to the attay that stores the Y fractional values
+	const NOISE_DATATYPE * a_FracZ          ///< Pointer to the array that stores the Z fractional values
+) :
+	m_Noise(a_Noise),
+	m_WorkRnds(&m_Workspace1),
+	m_CurFloorX(0),
+	m_CurFloorY(0),
+	m_CurFloorZ(0),
+	m_Array(a_Array),
+	m_SizeX(a_SizeX),
+	m_SizeY(a_SizeY),
+	m_SizeZ(a_SizeZ),
+	m_FracX(a_FracX),
+	m_FracY(a_FracY),
+	m_FracZ(a_FracZ)
+{
+}
+
+
+
+
+
+void cCubicCell3D::Generate(
+	int a_FromX, int a_ToX,
+	int a_FromY, int a_ToY,
+	int a_FromZ, int a_ToZ
+)
+{
+	for (int z = a_FromZ; z < a_ToZ; z++)
+	{
+		int idxZ = z * m_SizeX * m_SizeY;
+		NOISE_DATATYPE Interp2[4][4];
+		NOISE_DATATYPE FracZ = m_FracZ[z];
+		for (int x = 0; x < 4; x++)
+		{
+			for (int y = 0; y < 4; y++)
+			{
+				Interp2[x][y] = cNoise::CubicInterpolate((*m_WorkRnds)[x][y][0], (*m_WorkRnds)[x][y][1], (*m_WorkRnds)[x][y][2], (*m_WorkRnds)[x][y][3], FracZ);
+			}
+		}
+		for (int y = a_FromY; y < a_ToY; y++)
+		{
+			NOISE_DATATYPE Interp[4];
+			NOISE_DATATYPE FracY = m_FracY[y];
+			Interp[0] = cNoise::CubicInterpolate(Interp2[0][0], Interp2[0][1], Interp2[0][2], Interp2[0][3], FracY);
+			Interp[1] = cNoise::CubicInterpolate(Interp2[1][0], Interp2[1][1], Interp2[1][2], Interp2[1][3], FracY);
+			Interp[2] = cNoise::CubicInterpolate(Interp2[2][0], Interp2[2][1], Interp2[2][2], Interp2[2][3], FracY);
+			Interp[3] = cNoise::CubicInterpolate(Interp2[3][0], Interp2[3][1], Interp2[3][2], Interp2[3][3], FracY);
+			int idx = idxZ + y * m_SizeX + a_FromX;
+			for (int x = a_FromX; x < a_ToX; x++)
+			{
+				m_Array[idx++] = cNoise::CubicInterpolate(Interp[0], Interp[1], Interp[2], Interp[3], m_FracX[x]);
+			}  // for x
+		}  // for y
+	}  // for z
+}
+
+
+
+
+
+void cCubicCell3D::InitWorkRnds(int a_FloorX, int a_FloorY, int a_FloorZ)
+{
+	m_CurFloorX = a_FloorX;
+	m_CurFloorY = a_FloorY;
+	m_CurFloorZ = a_FloorZ;
+	for (int x = 0; x < 4; x++)
+	{
+		int cx = a_FloorX + x - 1;
+		for (int y = 0; y < 4; y++)
+		{
+			int cy = a_FloorY + y - 1;
+			for (int z = 0; z < 4; z++)
+			{
+				int cz = a_FloorZ + z - 1;
+				(*m_WorkRnds)[x][y][z] = (NOISE_DATATYPE)m_Noise.IntNoise3D(cx, cy, cz);
+			}
+		}
+	}
+}
+
+
+
+
+
+void cCubicCell3D::Move(int a_NewFloorX, int a_NewFloorY, int a_NewFloorZ)
+{
+	// Swap the doublebuffer:
+	int OldFloorX = m_CurFloorX;
+	int OldFloorY = m_CurFloorY;
+	int OldFloorZ = m_CurFloorZ;
+	Workspace * OldWorkRnds = m_WorkRnds;
+	m_WorkRnds = (m_WorkRnds == &m_Workspace1) ? &m_Workspace2 : &m_Workspace1;
+	
+	// Reuse as much of the old workspace as possible:
+	int DiffX = OldFloorX - a_NewFloorX;
+	int DiffY = OldFloorY - a_NewFloorY;
+	int DiffZ = OldFloorZ - a_NewFloorZ;
+	for (int x = 0; x < 4; x++)
+	{
+		int cx = a_NewFloorX + x - 1;
+		int OldX = x - DiffX;  // Where would this X be in the old grid?
+		for (int y = 0; y < 4; y++)
+		{
+			int cy = a_NewFloorY + y - 1;
+			int OldY = y - DiffY;  // Where would this Y be in the old grid?
+			for (int z = 0; z < 4; z++)
+			{
+				int cz = a_NewFloorZ + z - 1;
+				int OldZ = z - DiffZ;
+				if ((OldX >= 0) && (OldX < 4) && (OldY >= 0) && (OldY < 4) && (OldZ >= 0) && (OldZ < 4))
+				{
+					(*m_WorkRnds)[x][y][z] = (*OldWorkRnds)[OldX][OldY][OldZ];
+				}
+				else
+				{
+					(*m_WorkRnds)[x][y][z] = (NOISE_DATATYPE)m_Noise.IntNoise3D(cx, cy, cz);
+				}
+			}  // for z
+		}  // for y
+	}  // for x
+	m_CurFloorX = a_NewFloorX;
+	m_CurFloorY = a_NewFloorY;
+	m_CurFloorZ = a_NewFloorZ;
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cNoise:
+
+cNoise::cNoise(int a_Seed) :
+	m_Seed(a_Seed)
+{
+}
+
+
+
+
+
+cNoise::cNoise(const cNoise & a_Noise) :
+	m_Seed(a_Noise.m_Seed)
+{
+}
+
+
+
+
+
+NOISE_DATATYPE cNoise::LinearNoise1D(NOISE_DATATYPE a_X) const
+{
+	int BaseX = FAST_FLOOR(a_X);
+	NOISE_DATATYPE FracX = a_X - BaseX;
+	return LinearInterpolate(IntNoise1D(BaseX), IntNoise1D(BaseX + 1), FracX);
+}
+
+
+
+
+
+NOISE_DATATYPE cNoise::CosineNoise1D(NOISE_DATATYPE a_X) const
+{
+	int BaseX = FAST_FLOOR(a_X);
+	NOISE_DATATYPE FracX = a_X - BaseX;
+	return CosineInterpolate(IntNoise1D(BaseX), IntNoise1D(BaseX + 1), FracX);
+}
+
+
+
+
+
+NOISE_DATATYPE cNoise::CubicNoise1D(NOISE_DATATYPE a_X) const
+{
+	int BaseX = FAST_FLOOR(a_X);
+	NOISE_DATATYPE FracX = a_X - BaseX;
+	return CubicInterpolate(IntNoise1D(BaseX - 1), IntNoise1D(BaseX), IntNoise1D(BaseX + 1), IntNoise1D(BaseX + 2), FracX);
+}
+
+
+
+
+
+NOISE_DATATYPE cNoise::SmoothNoise1D(int a_X) const
+{
+	return IntNoise1D(a_X) / 2 + IntNoise1D(a_X - 1) / 4 + IntNoise1D(a_X + 1) / 4;
+}
+
+
+
+
+
+NOISE_DATATYPE cNoise::CubicNoise2D(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y) const
+{
+	const int BaseX = FAST_FLOOR(a_X);
+	const int BaseY = FAST_FLOOR(a_Y);
+	
+	const NOISE_DATATYPE points[4][4] =
+	{
+		{ IntNoise2D(BaseX - 1, BaseY - 1), IntNoise2D(BaseX, BaseY - 1), IntNoise2D(BaseX + 1, BaseY - 1), IntNoise2D(BaseX + 2, BaseY - 1), },
+		{ IntNoise2D(BaseX - 1, BaseY),     IntNoise2D(BaseX, BaseY),     IntNoise2D(BaseX + 1, BaseY),     IntNoise2D(BaseX + 2, BaseY),     },
+		{ IntNoise2D(BaseX - 1, BaseY + 1), IntNoise2D(BaseX, BaseY + 1), IntNoise2D(BaseX + 1, BaseY + 1), IntNoise2D(BaseX + 2, BaseY + 1), },
+		{ IntNoise2D(BaseX - 1, BaseY + 2), IntNoise2D(BaseX, BaseY + 2), IntNoise2D(BaseX + 1, BaseY + 2), IntNoise2D(BaseX + 2, BaseY + 2), },
+	};
+
+	const NOISE_DATATYPE FracX = a_X - BaseX;
+	const NOISE_DATATYPE interp1 = CubicInterpolate(points[0][0], points[0][1], points[0][2], points[0][3], FracX);
+	const NOISE_DATATYPE interp2 = CubicInterpolate(points[1][0], points[1][1], points[1][2], points[1][3], FracX);
+	const NOISE_DATATYPE interp3 = CubicInterpolate(points[2][0], points[2][1], points[2][2], points[2][3], FracX);
+	const NOISE_DATATYPE interp4 = CubicInterpolate(points[3][0], points[3][1], points[3][2], points[3][3], FracX);
+
+
+	const NOISE_DATATYPE FracY = a_Y - BaseY;
+	return CubicInterpolate(interp1, interp2, interp3, interp4, FracY);
+}
+
+
+
+
+
+NOISE_DATATYPE cNoise::CubicNoise3D(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOISE_DATATYPE a_Z) const
+{
+	const int BaseX = FAST_FLOOR(a_X);
+	const int BaseY = FAST_FLOOR(a_Y);
+	const int BaseZ = FAST_FLOOR(a_Z);
+	
+	const NOISE_DATATYPE points1[4][4] =
+	{
+		{ IntNoise3D(BaseX - 1, BaseY - 1, BaseZ - 1), IntNoise3D(BaseX, BaseY - 1, BaseZ - 1), IntNoise3D(BaseX + 1, BaseY - 1, BaseZ - 1), IntNoise3D(BaseX + 2, BaseY - 1, BaseZ - 1), },
+		{ IntNoise3D(BaseX - 1, BaseY,     BaseZ - 1), IntNoise3D(BaseX, BaseY,     BaseZ - 1), IntNoise3D(BaseX + 1, BaseY,     BaseZ - 1), IntNoise3D(BaseX + 2, BaseY,     BaseZ - 1), },
+		{ IntNoise3D(BaseX - 1, BaseY + 1, BaseZ - 1), IntNoise3D(BaseX, BaseY + 1, BaseZ - 1), IntNoise3D(BaseX + 1, BaseY + 1, BaseZ - 1), IntNoise3D(BaseX + 2, BaseY + 1, BaseZ - 1), },
+		{ IntNoise3D(BaseX - 1, BaseY + 2, BaseZ - 1), IntNoise3D(BaseX, BaseY + 2, BaseZ - 1), IntNoise3D(BaseX + 1, BaseY + 2, BaseZ - 1), IntNoise3D(BaseX + 2, BaseY + 2, BaseZ - 1), },
+	};
+
+	const NOISE_DATATYPE FracX = (a_X) - BaseX;
+	const NOISE_DATATYPE x1interp1 = CubicInterpolate( points1[0][0], points1[0][1], points1[0][2], points1[0][3], FracX);
+	const NOISE_DATATYPE x1interp2 = CubicInterpolate( points1[1][0], points1[1][1], points1[1][2], points1[1][3], FracX);
+	const NOISE_DATATYPE x1interp3 = CubicInterpolate( points1[2][0], points1[2][1], points1[2][2], points1[2][3], FracX);
+	const NOISE_DATATYPE x1interp4 = CubicInterpolate( points1[3][0], points1[3][1], points1[3][2], points1[3][3], FracX);
+
+	const NOISE_DATATYPE points2[4][4] =
+	{
+		{ IntNoise3D(BaseX - 1, BaseY - 1, BaseZ), IntNoise3D(BaseX, BaseY - 1, BaseZ), IntNoise3D(BaseX + 1, BaseY - 1, BaseZ), IntNoise3D(BaseX + 2, BaseY - 1, BaseZ), },
+		{ IntNoise3D(BaseX - 1, BaseY,     BaseZ), IntNoise3D(BaseX, BaseY,     BaseZ), IntNoise3D(BaseX + 1, BaseY,     BaseZ), IntNoise3D(BaseX + 2, BaseY,     BaseZ), },
+		{ IntNoise3D(BaseX - 1, BaseY + 1, BaseZ), IntNoise3D(BaseX, BaseY + 1, BaseZ), IntNoise3D(BaseX + 1, BaseY + 1, BaseZ), IntNoise3D(BaseX + 2, BaseY + 1, BaseZ), },
+		{ IntNoise3D(BaseX - 1, BaseY + 2, BaseZ), IntNoise3D(BaseX, BaseY + 2, BaseZ), IntNoise3D(BaseX + 1, BaseY + 2, BaseZ), IntNoise3D(BaseX + 2, BaseY + 2, BaseZ), },
+	};
+
+	const NOISE_DATATYPE x2interp1 = CubicInterpolate( points2[0][0], points2[0][1], points2[0][2], points2[0][3], FracX);
+	const NOISE_DATATYPE x2interp2 = CubicInterpolate( points2[1][0], points2[1][1], points2[1][2], points2[1][3], FracX);
+	const NOISE_DATATYPE x2interp3 = CubicInterpolate( points2[2][0], points2[2][1], points2[2][2], points2[2][3], FracX);
+	const NOISE_DATATYPE x2interp4 = CubicInterpolate( points2[3][0], points2[3][1], points2[3][2], points2[3][3], FracX);
+
+	const NOISE_DATATYPE points3[4][4] =
+	{
+		{ IntNoise3D( BaseX-1, BaseY-1, BaseZ+1), IntNoise3D( BaseX, BaseY-1, BaseZ+1), IntNoise3D( BaseX+1, BaseY-1, BaseZ+1), IntNoise3D( BaseX+2, BaseY-1, BaseZ + 1), },
+		{ IntNoise3D( BaseX-1, BaseY,	  BaseZ+1), IntNoise3D( BaseX, BaseY,   BaseZ+1), IntNoise3D( BaseX+1, BaseY,   BaseZ+1), IntNoise3D( BaseX+2, BaseY,   BaseZ + 1), },
+		{ IntNoise3D( BaseX-1, BaseY+1, BaseZ+1), IntNoise3D( BaseX, BaseY+1, BaseZ+1), IntNoise3D( BaseX+1, BaseY+1, BaseZ+1), IntNoise3D( BaseX+2, BaseY+1, BaseZ + 1), },
+		{ IntNoise3D( BaseX-1, BaseY+2, BaseZ+1), IntNoise3D( BaseX, BaseY+2, BaseZ+1), IntNoise3D( BaseX+1, BaseY+2, BaseZ+1), IntNoise3D( BaseX+2, BaseY+2, BaseZ + 1), },
+	};
+
+	const NOISE_DATATYPE x3interp1 = CubicInterpolate( points3[0][0], points3[0][1], points3[0][2], points3[0][3], FracX);
+	const NOISE_DATATYPE x3interp2 = CubicInterpolate( points3[1][0], points3[1][1], points3[1][2], points3[1][3], FracX);
+	const NOISE_DATATYPE x3interp3 = CubicInterpolate( points3[2][0], points3[2][1], points3[2][2], points3[2][3], FracX);
+	const NOISE_DATATYPE x3interp4 = CubicInterpolate( points3[3][0], points3[3][1], points3[3][2], points3[3][3], FracX);
+
+	const NOISE_DATATYPE points4[4][4] =
+	{
+		{ IntNoise3D( BaseX-1, BaseY-1, BaseZ+2), IntNoise3D( BaseX, BaseY-1, BaseZ+2), IntNoise3D( BaseX+1, BaseY-1, BaseZ+2), IntNoise3D( BaseX+2, BaseY-1, BaseZ+2), },
+		{ IntNoise3D( BaseX-1, BaseY,	  BaseZ+2), IntNoise3D( BaseX, BaseY,   BaseZ+2), IntNoise3D( BaseX+1, BaseY,   BaseZ+2), IntNoise3D( BaseX+2, BaseY,   BaseZ+2), },
+		{ IntNoise3D( BaseX-1, BaseY+1, BaseZ+2), IntNoise3D( BaseX, BaseY+1, BaseZ+2), IntNoise3D( BaseX+1, BaseY+1, BaseZ+2), IntNoise3D( BaseX+2, BaseY+1, BaseZ+2), },
+		{ IntNoise3D( BaseX-1, BaseY+2, BaseZ+2), IntNoise3D( BaseX, BaseY+2, BaseZ+2), IntNoise3D( BaseX+1, BaseY+2, BaseZ+2), IntNoise3D( BaseX+2, BaseY+2, BaseZ+2), },
+	};
+
+	const NOISE_DATATYPE x4interp1 = CubicInterpolate( points4[0][0], points4[0][1], points4[0][2], points4[0][3], FracX);
+	const NOISE_DATATYPE x4interp2 = CubicInterpolate( points4[1][0], points4[1][1], points4[1][2], points4[1][3], FracX);
+	const NOISE_DATATYPE x4interp3 = CubicInterpolate( points4[2][0], points4[2][1], points4[2][2], points4[2][3], FracX);
+	const NOISE_DATATYPE x4interp4 = CubicInterpolate( points4[3][0], points4[3][1], points4[3][2], points4[3][3], FracX);
+
+	const NOISE_DATATYPE FracY = (a_Y) - BaseY;
+	const NOISE_DATATYPE yinterp1 = CubicInterpolate( x1interp1, x1interp2, x1interp3, x1interp4, FracY);
+	const NOISE_DATATYPE yinterp2 = CubicInterpolate( x2interp1, x2interp2, x2interp3, x2interp4, FracY);
+	const NOISE_DATATYPE yinterp3 = CubicInterpolate( x3interp1, x3interp2, x3interp3, x3interp4, FracY);
+	const NOISE_DATATYPE yinterp4 = CubicInterpolate( x4interp1, x4interp2, x4interp3, x4interp4, FracY);
+
+	const NOISE_DATATYPE FracZ = (a_Z) - BaseZ;
+	return CubicInterpolate( yinterp1, yinterp2, yinterp3, yinterp4, FracZ);
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cCubicNoise:
+
+cCubicNoise::cCubicNoise(int a_Seed) :
+	m_Noise(a_Seed)
+{
+}
+
+
+
+
+
+void cCubicNoise::Generate2D(
+	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+	int a_SizeX, int a_SizeY,                        ///< Size of the array (num doubles), in each direction
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY   ///< Noise-space coords of the array in the Y direction
+) const
+{
+	ASSERT(a_SizeX > 0);
+	ASSERT(a_SizeY > 0);
+	ASSERT(a_SizeX < MAX_SIZE);
+	ASSERT(a_SizeY < MAX_SIZE);
+	ASSERT(a_StartX < a_EndX);
+	ASSERT(a_StartY < a_EndY);
+	
+	// Calculate the integral and fractional parts of each coord:
+	int FloorX[MAX_SIZE];
+	int FloorY[MAX_SIZE];
+	NOISE_DATATYPE FracX[MAX_SIZE];
+	NOISE_DATATYPE FracY[MAX_SIZE];
+	int SameX[MAX_SIZE];
+	int SameY[MAX_SIZE];
+	int NumSameX, NumSameY;
+	CalcFloorFrac(a_SizeX, a_StartX, a_EndX, FloorX, FracX, SameX, NumSameX);
+	CalcFloorFrac(a_SizeY, a_StartY, a_EndY, FloorY, FracY, SameY, NumSameY);
+	
+	cCubicCell2D Cell(m_Noise, a_Array, a_SizeX, a_SizeY, FracX, FracY);
+	
+	Cell.InitWorkRnds(FloorX[0], FloorY[0]);
+	
+	// Calculate query values using Cell:
+	int FromY = 0;
+	for (int y = 0; y < NumSameY; y++)
+	{
+		int ToY = FromY + SameY[y];
+		int FromX = 0;
+		int CurFloorY = FloorY[FromY];
+		for (int x = 0; x < NumSameX; x++)
+		{
+			int ToX = FromX + SameX[x];
+			Cell.Generate(FromX, ToX, FromY, ToY);
+			Cell.Move(FloorX[ToX], CurFloorY);
+			FromX = ToX;
+		}
+		Cell.Move(FloorX[0], FloorY[ToY]);
+		FromY = ToY;
+	}
+}
+
+
+
+
+
+void cCubicNoise::Generate3D(
+	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+	int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Size of the array (num doubles), in each direction
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+	NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ   ///< Noise-space coords of the array in the Y direction
+) const
+{
+	ASSERT(a_SizeX < MAX_SIZE);
+	ASSERT(a_SizeY < MAX_SIZE);
+	ASSERT(a_SizeZ < MAX_SIZE);
+	ASSERT(a_StartX < a_EndX);
+	ASSERT(a_StartY < a_EndY);
+	ASSERT(a_StartZ < a_EndZ);
+	
+	// Calculate the integral and fractional parts of each coord:
+	int FloorX[MAX_SIZE];
+	int FloorY[MAX_SIZE];
+	int FloorZ[MAX_SIZE];
+	NOISE_DATATYPE FracX[MAX_SIZE];
+	NOISE_DATATYPE FracY[MAX_SIZE];
+	NOISE_DATATYPE FracZ[MAX_SIZE];
+	int SameX[MAX_SIZE];
+	int SameY[MAX_SIZE];
+	int SameZ[MAX_SIZE];
+	int NumSameX, NumSameY, NumSameZ;
+	CalcFloorFrac(a_SizeX, a_StartX, a_EndX, FloorX, FracX, SameX, NumSameX);
+	CalcFloorFrac(a_SizeY, a_StartY, a_EndY, FloorY, FracY, SameY, NumSameY);
+	CalcFloorFrac(a_SizeZ, a_StartZ, a_EndZ, FloorZ, FracZ, SameZ, NumSameZ);
+	
+	cCubicCell3D Cell(
+		m_Noise, a_Array,
+		a_SizeX, a_SizeY, a_SizeZ,
+		FracX, FracY, FracZ
+	);
+	
+	Cell.InitWorkRnds(FloorX[0], FloorY[0], FloorZ[0]);
+	
+	// Calculate query values using Cell:
+	int FromZ = 0;
+	for (int z = 0; z < NumSameZ; z++)
+	{
+		int ToZ = FromZ + SameZ[z];
+		int CurFloorZ = FloorZ[FromZ];
+		int FromY = 0;
+		for (int y = 0; y < NumSameY; y++)
+		{
+			int ToY = FromY + SameY[y];
+			int CurFloorY = FloorY[FromY];
+			int FromX = 0;
+			for (int x = 0; x < NumSameX; x++)
+			{
+				int ToX = FromX + SameX[x];
+				Cell.Generate(FromX, ToX, FromY, ToY, FromZ, ToZ);
+				Cell.Move(FloorX[ToX], CurFloorY, CurFloorZ);
+				FromX = ToX;
+			}
+			Cell.Move(FloorX[0], FloorY[ToY], CurFloorZ);
+			FromY = ToY;
+		}  // for y
+		Cell.Move(FloorX[0], FloorY[0], FloorZ[ToZ]);
+		FromZ = ToZ;
+	}  // for z
+}
+
+
+
+
+
+void cCubicNoise::CalcFloorFrac(
+	int a_Size,
+	NOISE_DATATYPE a_Start, NOISE_DATATYPE a_End,
+	int * a_Floor, NOISE_DATATYPE * a_Frac,
+	int * a_Same, int & a_NumSame
+) const
+{
+	ASSERT(a_Size > 0);
+
+	NOISE_DATATYPE val = a_Start;
+	NOISE_DATATYPE dif = (a_End - a_Start) / (a_Size - 1);
+	for (int i = 0; i < a_Size; i++)
+	{
+		a_Floor[i] = FAST_FLOOR(val);
+		a_Frac[i] = val - a_Floor[i];
+		val += dif;
+	}
+	
+	// Mark up the same floor values into a_Same / a_NumSame:
+	int CurFloor = a_Floor[0];
+	int LastSame = 0;
+	a_NumSame = 0;
+	for (int i = 1; i < a_Size; i++)
+	{
+		if (a_Floor[i] != CurFloor)
+		{
+			a_Same[a_NumSame] = i - LastSame;
+			LastSame = i;
+			a_NumSame += 1;
+			CurFloor = a_Floor[i];
+		}
+	}  // for i - a_Floor[]
+	if (LastSame < a_Size)
+	{
+		a_Same[a_NumSame] = a_Size - LastSame;
+		a_NumSame += 1;
+	}
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cImprovedNoise:
+
+cImprovedNoise::cImprovedNoise(int a_Seed)
+{
+	// Initialize the permutations with identity:
+	for (int i = 0; i < 256; i++)
+	{
+		m_Perm[i] = i;
+	}
+
+	// Randomize the permutation table - swap each element with a random other element:
+	cNoise noise(a_Seed);
+	for (int i = 0; i < 256; i++)
+	{
+		int rnd = (noise.IntNoise1DInt(i) / 7) % 256;
+		std::swap(m_Perm[i], m_Perm[rnd]);
+	}
+
+	// Copy the lower 256 entries into upper 256 entries:
+	for (int i = 0; i < 256; i++)
+	{
+		m_Perm[i + 256] = m_Perm[i];
+	}
+}
+
+
+
+
+
+void cImprovedNoise::Generate2D(
+	NOISE_DATATYPE * a_Array,
+	int a_SizeX, int a_SizeY,
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY
+) const
+{
+	size_t idx = 0;
+	for (int y = 0; y < a_SizeY; y++)
+	{
+		NOISE_DATATYPE ratioY = static_cast<NOISE_DATATYPE>(y) / (a_SizeY - 1);
+		NOISE_DATATYPE noiseY = Lerp(a_StartY, a_EndY, ratioY);
+		int noiseYInt = FAST_FLOOR(noiseY);
+		int yCoord = noiseYInt & 255;
+		NOISE_DATATYPE noiseYFrac = noiseY - noiseYInt;
+		NOISE_DATATYPE fadeY = Fade(noiseYFrac);
+		for (int x = 0; x < a_SizeX; x++)
+		{
+			NOISE_DATATYPE ratioX = static_cast<NOISE_DATATYPE>(x) / (a_SizeX - 1);
+			NOISE_DATATYPE noiseX = Lerp(a_StartX, a_EndX, ratioX);
+			int noiseXInt = FAST_FLOOR(noiseX);
+			int xCoord = noiseXInt & 255;
+			NOISE_DATATYPE noiseXFrac = noiseX - noiseXInt;
+			NOISE_DATATYPE fadeX = Fade(noiseXFrac);
+
+			// Hash the coordinates:
+			int A  = m_Perm[xCoord] + yCoord;
+			int AA = m_Perm[A];
+			int AB = m_Perm[A + 1];
+			int B  = m_Perm[xCoord + 1] + yCoord;
+			int BA = m_Perm[B];
+			int BB = m_Perm[B + 1];
+
+			// Lerp the gradients:
+			a_Array[idx++] = Lerp(
+				Lerp(Grad(m_Perm[AA], noiseXFrac, noiseYFrac,     0), Grad(m_Perm[BA], noiseXFrac - 1, noiseYFrac,     0), fadeX),
+				Lerp(Grad(m_Perm[AB], noiseXFrac, noiseYFrac - 1, 0), Grad(m_Perm[BB], noiseXFrac - 1, noiseYFrac - 1, 0), fadeX),
+				fadeY
+			);
+		}  // for x
+	}  // for y
+}
+
+
+
+
+
+void cImprovedNoise::Generate3D(
+	NOISE_DATATYPE * a_Array,
+	int a_SizeX, int a_SizeY, int a_SizeZ,
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,
+	NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ
+) const
+{
+	size_t idx = 0;
+	for (int z = 0; z < a_SizeZ; z++)
+	{
+		NOISE_DATATYPE ratioZ = static_cast<NOISE_DATATYPE>(z) / (a_SizeZ - 1);
+		NOISE_DATATYPE noiseZ = Lerp(a_StartZ, a_EndZ, ratioZ);
+		int noiseZInt = FAST_FLOOR(noiseZ);
+		int zCoord = noiseZInt & 255;
+		NOISE_DATATYPE noiseZFrac = noiseZ - noiseZInt;
+		NOISE_DATATYPE fadeZ = Fade(noiseZFrac);
+		for (int y = 0; y < a_SizeY; y++)
+		{
+			NOISE_DATATYPE ratioY = static_cast<NOISE_DATATYPE>(y) / (a_SizeY - 1);
+			NOISE_DATATYPE noiseY = Lerp(a_StartY, a_EndY, ratioY);
+			int noiseYInt = FAST_FLOOR(noiseY);
+			int yCoord = noiseYInt & 255;
+			NOISE_DATATYPE noiseYFrac = noiseY - noiseYInt;
+			NOISE_DATATYPE fadeY = Fade(noiseYFrac);
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				NOISE_DATATYPE ratioX = static_cast<NOISE_DATATYPE>(x) / (a_SizeX - 1);
+				NOISE_DATATYPE noiseX = Lerp(a_StartX, a_EndX, ratioX);
+				int noiseXInt = FAST_FLOOR(noiseX);
+				int xCoord = noiseXInt & 255;
+				NOISE_DATATYPE noiseXFrac = noiseX - noiseXInt;
+				NOISE_DATATYPE fadeX = Fade(noiseXFrac);
+
+				// Hash the coordinates:
+				int A  = m_Perm[xCoord] + yCoord;
+				int AA = m_Perm[A] + zCoord;
+				int AB = m_Perm[A + 1] + zCoord;
+				int B  = m_Perm[xCoord + 1] + yCoord;
+				int BA = m_Perm[B] + zCoord;
+				int BB = m_Perm[B + 1] + zCoord;
+
+				// Lerp the gradients:
+				// TODO: This may be optimized by swapping the coords and recalculating most lerps only "once every x"
+				a_Array[idx++] = Lerp(
+					Lerp(
+						Lerp(Grad(m_Perm[AA], noiseXFrac, noiseYFrac,     noiseZFrac), Grad(m_Perm[BA], noiseXFrac - 1, noiseYFrac,     noiseZFrac), fadeX),
+						Lerp(Grad(m_Perm[AB], noiseXFrac, noiseYFrac - 1, noiseZFrac), Grad(m_Perm[BB], noiseXFrac - 1, noiseYFrac - 1, noiseZFrac), fadeX),
+						fadeY
+					),
+					Lerp(
+						Lerp(Grad(m_Perm[AA + 1], noiseXFrac, noiseYFrac,     noiseZFrac - 1), Grad(m_Perm[BA + 1], noiseXFrac - 1, noiseYFrac,     noiseZFrac - 1), fadeX),
+						Lerp(Grad(m_Perm[AB + 1], noiseXFrac, noiseYFrac - 1, noiseZFrac - 1), Grad(m_Perm[BB + 1], noiseXFrac - 1, noiseYFrac - 1, noiseZFrac - 1), fadeX),
+						fadeY
+					),
+					fadeZ
+				);
+			}  // for x
+		}  // for y
+	}  // for z
+}
+
+
+
+
+
+NOISE_DATATYPE cImprovedNoise::GetValueAt(int a_X, int a_Y, int a_Z)
+{
+	// Hash the coordinates:
+	a_X = a_X & 255;
+	a_Y = a_Y & 255;
+	a_Z = a_Z & 255;
+	int A  = m_Perm[a_X] + a_Y;
+	int AA = m_Perm[A] + a_Z;
+
+	return Grad(m_Perm[AA], 1, 1, 1);
+}
+
+
+
+
+