1 files changed, 951 insertions, 0 deletions

diff --git a/src/Noise.cpp b/src/Noise.cpp
new file mode 100644
index 000000000..729641961
--- /dev/null
+++ b/src/Noise.cpp
@@ -0,0 +1,951 @@
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "Noise.h"
+
+
+
+
+
+#if NOISE_USE_SSE
+	#include <smmintrin.h> //_mm_mul_epi32
+#endif
+
+#define FAST_FLOOR(x) (((x) < 0) ? (((int)x) - 1) : ((int)x))
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Globals:
+
+void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase)
+{
+	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] = (unsigned char)(std::min(255, std::max(0, (int)(128 + 32 * a_Noise[idx++]))));
+				}
+				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] = (unsigned char)(std::min(255, std::max(0, (int)(128 + 32 * a_Noise[idx++]))));
+				}
+				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)
+{
+	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] = (unsigned char)(std::min(255, std::max(0, (int)(128 + 32 * a_Noise[idx++]))));
+			}
+			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_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_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(unsigned 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:
+
+#ifdef _DEBUG
+	int cCubicNoise::m_NumSingleX = 0;
+	int cCubicNoise::m_NumSingleXY = 0;
+	int cCubicNoise::m_NumSingleY = 0;
+	int cCubicNoise::m_NumCalls = 0;
+#endif  // _DEBUG
+
+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 < 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]);
+	
+	#ifdef _DEBUG
+		// Statistics on the noise-space coords:	
+		if (NumSameX == 1)
+		{
+			m_NumSingleX++;
+			if (NumSameY == 1)
+			{
+				m_NumSingleXY++;
+			}
+		}
+		if (NumSameY == 1)
+		{
+			m_NumSingleY++;
+		}
+		m_NumCalls++;
+	#endif  // _DEBUG
+	
+	// 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
+{
+	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;
+	}
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cPerlinNoise:
+
+cPerlinNoise::cPerlinNoise(void) :
+	m_Seed(0)
+{
+}
+
+
+
+
+
+cPerlinNoise::cPerlinNoise(int a_Seed) :
+	m_Seed(a_Seed)
+{
+}
+
+
+
+
+
+void cPerlinNoise::SetSeed(int a_Seed)
+{
+	m_Seed = a_Seed;
+}
+
+
+
+
+
+void cPerlinNoise::AddOctave(float a_Frequency, float a_Amplitude)
+{
+	m_Octaves.push_back(cOctave(m_Seed * (m_Octaves.size() + 4) * 4 + 1024, a_Frequency, a_Amplitude));
+}
+
+
+
+
+
+void cPerlinNoise::Generate2D(
+	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
+	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_Workspace                     ///< Workspace that this function can use and trash
+) const
+{
+	if (m_Octaves.empty())
+	{
+		// No work to be done
+		ASSERT(!"Perlin: No octaves to generate!");
+		return;
+	}
+	
+	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	int ArrayCount = a_SizeX * a_SizeY;
+	if (ShouldFreeWorkspace)
+	{
+		a_Workspace = new NOISE_DATATYPE[ArrayCount];
+	}
+	
+	// Generate the first octave directly into array:
+	m_Octaves.front().m_Noise.Generate2D(
+		a_Workspace, a_SizeX, a_SizeY,
+		a_StartX * m_Octaves.front().m_Frequency, a_EndX * m_Octaves.front().m_Frequency,
+		a_StartY * m_Octaves.front().m_Frequency, a_EndY * m_Octaves.front().m_Frequency
+	);
+	NOISE_DATATYPE Amplitude = m_Octaves.front().m_Amplitude;
+	for (int i = 0; i < ArrayCount; i++)
+	{
+		a_Array[i] *= Amplitude;
+	}
+	
+	// Add each octave:
+	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
+	{
+		// Generate cubic noise for the octave:
+		itr->m_Noise.Generate2D(
+			a_Workspace, a_SizeX, a_SizeY,
+			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency
+		);
+		// Add the cubic noise into the output:
+		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+		for (int i = 0; i < ArrayCount; i++)
+		{
+			a_Array[i] += a_Workspace[i] * Amplitude;
+		}
+	}
+	
+	if (ShouldFreeWorkspace)
+	{
+		delete[] a_Workspace;
+	}
+}
+
+
+
+
+
+void cPerlinNoise::Generate3D(
+	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+	int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, 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 Z direction
+	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
+) const
+{
+	if (m_Octaves.empty())
+	{
+		// No work to be done
+		ASSERT(!"Perlin: No octaves to generate!");
+		return;
+	}
+	
+	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
+	if (ShouldFreeWorkspace)
+	{
+		a_Workspace = new NOISE_DATATYPE[ArrayCount];
+	}
+	
+	// Generate the first octave directly into array:
+	m_Octaves.front().m_Noise.Generate3D(
+		a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+		a_StartX * m_Octaves.front().m_Frequency, a_EndX * m_Octaves.front().m_Frequency,
+		a_StartY * m_Octaves.front().m_Frequency, a_EndY * m_Octaves.front().m_Frequency,
+		a_StartZ * m_Octaves.front().m_Frequency, a_EndZ * m_Octaves.front().m_Frequency
+	);
+	NOISE_DATATYPE Amplitude = m_Octaves.front().m_Amplitude;
+	for (int i = 0; i < ArrayCount; i++)
+	{
+		a_Array[i] = a_Workspace[i] * Amplitude;
+	}
+	
+	// Add each octave:
+	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
+	{
+		// Generate cubic noise for the octave:
+		itr->m_Noise.Generate3D(
+			a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency,
+			a_StartZ * itr->m_Frequency, a_EndZ * itr->m_Frequency
+		);
+		// Add the cubic noise into the output:
+		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+		for (int i = 0; i < ArrayCount; i++)
+		{
+			a_Array[i] += a_Workspace[i] * Amplitude;
+		}
+	}
+	
+	if (ShouldFreeWorkspace)
+	{
+		delete[] a_Workspace;
+	}
+}
+
+
+
+