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Diffstat (limited to 'source/Noise.cpp')
| -rw-r--r-- | source/Noise.cpp | 951 |
1 files changed, 0 insertions, 951 deletions
diff --git a/source/Noise.cpp b/source/Noise.cpp deleted file mode 100644 index 729641961..000000000 --- a/source/Noise.cpp +++ /dev/null @@ -1,951 +0,0 @@ - -#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; - } -} - - - - |