From 2467d29a4ec63936d0af20ae4d5cfb8e897e75be Mon Sep 17 00:00:00 2001 From: Mattes D Date: Tue, 18 Nov 2014 12:07:08 +0100 Subject: Moved all Noise-related files into a separate folder. --- src/Noise.h | 347 ------------------------------------------------------------ 1 file changed, 347 deletions(-) delete mode 100644 src/Noise.h (limited to 'src/Noise.h') diff --git a/src/Noise.h b/src/Noise.h deleted file mode 100644 index e616155d5..000000000 --- a/src/Noise.h +++ /dev/null @@ -1,347 +0,0 @@ - -// Noise.h - -// Declares the cNoise, cCubicNoise and cPerlinNoise classes for generating noise - -#pragma once - -#include - -/** The datatype used by all the noise generators. */ -typedef float NOISE_DATATYPE; - -#include "OctavedNoise.h" -#include "RidgedNoise.h" - - - - - -class cNoise -{ -public: - cNoise(int a_Seed); - cNoise(const cNoise & a_Noise); - - // The following functions, if not marked INLINE, are about 20 % slower - inline NOISE_DATATYPE IntNoise1D(int a_X) const; - inline NOISE_DATATYPE IntNoise2D(int a_X, int a_Y) const; - inline NOISE_DATATYPE IntNoise3D(int a_X, int a_Y, int a_Z) const; - - // Return a float number in the specified range: - inline NOISE_DATATYPE IntNoise2DInRange(int a_X, int a_Y, float a_Min, float a_Max) const - { - return a_Min + std::abs(IntNoise2D(a_X, a_Y)) * (a_Max - a_Min); - } - - // Note: These functions have a mod8-irregular chance - each of the mod8 remainders has different chance of occurrence. Divide by 8 to rectify. - inline int IntNoise1DInt(int a_X) const; - inline int IntNoise2DInt(int a_X, int a_Y) const; - inline int IntNoise3DInt(int a_X, int a_Y, int a_Z) const; - - NOISE_DATATYPE LinearNoise1D(NOISE_DATATYPE a_X) const; - NOISE_DATATYPE CosineNoise1D(NOISE_DATATYPE a_X) const; - NOISE_DATATYPE CubicNoise1D (NOISE_DATATYPE a_X) const; - NOISE_DATATYPE SmoothNoise1D(int a_X) const; - - NOISE_DATATYPE CubicNoise2D (NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y) const; - - NOISE_DATATYPE CubicNoise3D (NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOISE_DATATYPE a_Z) const; - - void SetSeed(int a_Seed) { m_Seed = a_Seed; } - - inline static NOISE_DATATYPE CubicInterpolate (NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_C, NOISE_DATATYPE a_D, NOISE_DATATYPE a_Pct); - inline static NOISE_DATATYPE CosineInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct); - inline static NOISE_DATATYPE LinearInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct); - -private: - int m_Seed; -} ; - - - - - -class cCubicNoise -{ -public: - static const int MAX_SIZE = 512; ///< Maximum size of each dimension of the query arrays. - - - cCubicNoise(int a_Seed); - - - void Generate1D( - NOISE_DATATYPE * a_Array, ///< Array to generate into - int a_SizeX, ///< Count of the array - NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX ///< Noise-space coords of the array - ) const; - - - void 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 - ) const; - - - void 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 - ) const; - -protected: - typedef NOISE_DATATYPE Workspace1D[4]; - typedef NOISE_DATATYPE Workspace2D[4][4]; - - cNoise m_Noise; // Used for integral rnd values - - #ifdef _DEBUG - // Statistics on the noise-space coords: - static int m_NumSingleX; - static int m_NumSingleXY; - static int m_NumSingleY; - static int m_NumCalls; - #endif // _DEBUG - - /// Calculates the integral and fractional parts along one axis. - void 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; - - void UpdateWorkRnds2DX( - Workspace2D & a_WorkRnds, - Workspace1D & a_Interps, - int a_LastFloorX, int a_NewFloorX, - int a_FloorY, - NOISE_DATATYPE a_FractionY - ) const; -} ; - - - - - -/** Improved noise, as described by Ken Perlin: http://mrl.nyu.edu/~perlin/paper445.pdf -Implementation adapted from Perlin's Java implementation: http://mrl.nyu.edu/~perlin/noise/ */ -class cImprovedNoise -{ -public: - /** Constructs a new instance of the noise obbject. - Note that this operation is quite expensive (the permutation array being constructed). */ - cImprovedNoise(int a_Seed); - - - /** Fills a 2D array with the values of the noise. */ - void 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 - ) const; - - - /** Fills a 3D array with the values of the noise. */ - void 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 - ) const; - - /** Returns the value at the specified integral coords. Used for raw speed measurement. */ - NOISE_DATATYPE GetValueAt(int a_X, int a_Y, int a_Z); - -protected: - - /** The permutation table used by the noise function. Initialized using seed. */ - int m_Perm[512]; - - - /** Calculates the fade curve, 6 * t^5 - 15 * t^4 + 10 * t^3. */ - inline static NOISE_DATATYPE Fade(NOISE_DATATYPE a_T) - { - return a_T * a_T * a_T * (a_T * (a_T * 6 - 15) + 10); - } - - /** Returns the gradient value based on the hash. */ - inline static NOISE_DATATYPE Grad(int a_Hash, NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOISE_DATATYPE a_Z) - { - int hash = a_Hash % 16; - NOISE_DATATYPE u = (hash < 8) ? a_X : a_Y; - NOISE_DATATYPE v = (hash < 4) ? a_Y : (((hash == 12) || (hash == 14)) ? a_X : a_Z); - return (((hash & 1) == 0) ? u : -u) + (((hash & 2) == 0) ? v : -v); - } -}; - - - - - -typedef cOctavedNoise cPerlinNoise; -typedef cOctavedNoise> cRidgedMultiNoise; - - - - - -//////////////////////////////////////////////////////////////////////////////// -// Inline function definitions: -// These need to be in the header, otherwise linker error occur in MSVC - -NOISE_DATATYPE cNoise::IntNoise1D(int a_X) const -{ - int x = ((a_X * m_Seed) << 13) ^ a_X; - return (1 - (NOISE_DATATYPE)((x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824); - // returns a float number in the range of [-1, 1] -} - - - - - -NOISE_DATATYPE cNoise::IntNoise2D(int a_X, int a_Y) const -{ - int n = a_X + a_Y * 57 + m_Seed * 57 * 57; - n = (n << 13) ^ n; - return (1 - (NOISE_DATATYPE)((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824); - // returns a float number in the range of [-1, 1] -} - - - - - -NOISE_DATATYPE cNoise::IntNoise3D(int a_X, int a_Y, int a_Z) const -{ - int n = a_X + a_Y * 57 + a_Z * 57 * 57 + m_Seed * 57 * 57 * 57; - n = (n << 13) ^ n; - return ((NOISE_DATATYPE)1 - (NOISE_DATATYPE)((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0f); - // returns a float number in the range of [-1, 1] -} - - - - - -int cNoise::IntNoise1DInt(int a_X) const -{ - int x = ((a_X * m_Seed) << 13) ^ a_X; - return ((x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff); -} - - - - - -int cNoise::IntNoise2DInt(int a_X, int a_Y) const -{ - int n = a_X + a_Y * 57 + m_Seed * 57 * 57; - n = (n << 13) ^ n; - return ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff); -} - - - - - -int cNoise::IntNoise3DInt(int a_X, int a_Y, int a_Z) const -{ - int n = a_X + a_Y * 57 + a_Z * 57 * 57 + m_Seed * 57 * 57 * 57; - n = (n << 13) ^ n; - return ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff); -} - - - - - -NOISE_DATATYPE cNoise::CubicInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_C, NOISE_DATATYPE a_D, NOISE_DATATYPE a_Pct) -{ - NOISE_DATATYPE P = (a_D - a_C) - (a_A - a_B); - NOISE_DATATYPE Q = (a_A - a_B) - P; - NOISE_DATATYPE R = a_C - a_A; - NOISE_DATATYPE S = a_B; - - return ((P * a_Pct + Q) * a_Pct + R) * a_Pct + S; -} - - - - - -NOISE_DATATYPE cNoise::CosineInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct) -{ - const NOISE_DATATYPE ft = a_Pct * (NOISE_DATATYPE)3.1415927; - const NOISE_DATATYPE f = (NOISE_DATATYPE)((NOISE_DATATYPE)(1 - cos(ft)) * (NOISE_DATATYPE)0.5); - return a_A * (1 - f) + a_B * f; -} - - - - - -NOISE_DATATYPE cNoise::LinearInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct) -{ - return a_A * (1 - a_Pct) + a_B * a_Pct; -} - - - - - -//////////////////////////////////////////////////////////////////////////////// -// Global functions: - -/** Exports the noise array into a file. -a_Coeff specifies the value that each array value is multiplied by before being converted into a byte. */ -extern void Debug2DNoise(const NOISE_DATATYPE * a_Array, int a_SizeX, int a_SizeY, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff = 32); - -/** Exports the noise array into a set of files, ordered by XY and XZ. -a_Coeff specifies the value that each array value is multiplied by before being converted into a byte. */ -extern void Debug3DNoise(const NOISE_DATATYPE * a_Array, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff = 32); - - - - -/** Linearly interpolates between two values. -Assumes that a_Ratio is in range [0, 1]. */ -inline NOISE_DATATYPE Lerp(NOISE_DATATYPE a_Val1, NOISE_DATATYPE a_Val2, NOISE_DATATYPE a_Ratio) -{ - return a_Val1 + (a_Val2 - a_Val1) * a_Ratio; -} - - - - - -/** Linearly interpolates between two values, clamping the ratio to [0, 1] first. */ -inline NOISE_DATATYPE ClampedLerp(NOISE_DATATYPE a_Val1, NOISE_DATATYPE a_Val2, NOISE_DATATYPE a_Ratio) -{ - if (a_Ratio < 0) - { - return a_Val1; - } - if (a_Ratio > 1) - { - return a_Val2; - } - return Lerp(a_Val1, a_Val2, a_Ratio); -} - - - - - - - - - -- cgit v1.2.3