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diff --git a/source/Noise.h b/source/Noise.h
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-
-// Noise.h
-
-// Declares the cNoise, cCubicNoise and cPerlinNoise classes for generating noise
-
-#pragma once
-
-// Some settings
-#define NOISE_DATATYPE float
-
-
-
-
-
-#ifdef _MSC_VER
- #define INLINE __forceinline
-#else
- #define INLINE inline
-#endif
-
-
-
-
-
-class cNoise
-{
-public:
- cNoise(unsigned 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;
-
- // 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(unsigned 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:
- unsigned 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;
-} ;
-
-
-
-
-
-class cPerlinNoise
-{
-public:
- cPerlinNoise(void);
- cPerlinNoise(int a_Seed);
-
-
- void SetSeed(int a_Seed);
-
- void AddOctave(NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude);
-
- 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
- NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
- ) 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
- NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
- ) 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
- NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
- ) const;
-
-protected:
- class cOctave
- {
- public:
- cCubicNoise m_Noise;
-
- NOISE_DATATYPE m_Frequency; // Coord multiplier
- NOISE_DATATYPE m_Amplitude; // Value multiplier
-
- cOctave(int a_Seed, NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude) :
- m_Noise(a_Seed),
- m_Frequency(a_Frequency),
- m_Amplitude(a_Amplitude)
- {
- }
- } ;
-
- typedef std::vector<cOctave> cOctaves;
-
- int m_Seed;
- cOctaves m_Octaves;
-} ;
-
-
-
-
-
-///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// 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 = (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:
-
-extern void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, const AString & a_FileNameBase);
-extern void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase);
-
-
-
-
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