Implemented the new cCubicNoise in 2D
git-svn-id: http://mc-server.googlecode.com/svn/trunk@1387 0a769ca7-a7f5-676a-18bf-c427514a06d6master
madmaxoft@gmail.com
parent
f5842062d3
commit
0a7c2d3146
309
source/Noise.cpp
309
source/Noise.cpp
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@ -2,28 +2,193 @@
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#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
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#include "Noise.h"
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#include <math.h>
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#if NOISE_USE_SSE
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#include <smmintrin.h> //_mm_mul_epi32
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#include <smmintrin.h> //_mm_mul_epi32
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#endif
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#define FAST_FLOOR( x ) ( (x) < 0 ? ((int)x)-1 : ((int)x) )
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#define FAST_FLOOR(x) (((x) < 0) ? (((int)x) - 1) : ((int)x))
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cNoise::cNoise( unsigned int a_Seed )
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: m_Seed( a_Seed )
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NOISE_DATATYPE CubicInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_C, NOISE_DATATYPE a_D, NOISE_DATATYPE a_Pct)
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{
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NOISE_DATATYPE P = (a_D - a_C) - (a_A - a_B);
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NOISE_DATATYPE Q = (a_A - a_B) - P;
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NOISE_DATATYPE R = a_C - a_A;
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NOISE_DATATYPE S = a_B;
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return ((P * a_Pct + Q) * a_Pct + R) * a_Pct + S;
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}
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class cCubicCell2D
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{
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public:
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cCubicCell2D(
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cNoise & a_Noise, ///< Noise to use for generating the random values
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NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
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int a_SizeX, int a_SizeY, ///< Count of the array, in each direction
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const NOISE_DATATYPE * a_FracX, ///< Pointer to the array that stores the X fractional values
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const NOISE_DATATYPE * a_FracY ///< Pointer to the attay that stores the Y fractional values
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);
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/// Uses current m_WorkRnds[] to generate part of the array
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void Generate(
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int a_FromX, int a_ToX,
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int a_FromY, int a_ToY
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);
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/// Initializes m_WorkRnds[] with the specified Floor values
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void InitWorkRnds(int a_FloorX, int a_FloorY);
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/// Updates m_WorkRnds[] for the new Floor values.
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void Move(int a_NewFloorX, int a_NewFloorY);
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protected:
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typedef NOISE_DATATYPE Workspace[4][4];
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cNoise & m_Noise;
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Workspace * m_WorkRnds; ///< The current random values; points to either m_Workspace1 or m_Workspace2 (doublebuffering)
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Workspace m_Workspace1; ///< Buffer 1 for workspace doublebuffering, used in Move()
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Workspace m_Workspace2; ///< Buffer 2 for workspace doublebuffering, used in Move()
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int m_CurFloorX;
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int m_CurFloorY;
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NOISE_DATATYPE * m_Array;
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int m_SizeX, m_SizeY;
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const NOISE_DATATYPE * m_FracX;
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const NOISE_DATATYPE * m_FracY;
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} ;
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cCubicCell2D::cCubicCell2D(
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cNoise & a_Noise, ///< Noise to use for generating the random values
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NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
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int a_SizeX, int a_SizeY, ///< Count of the array, in each direction
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const NOISE_DATATYPE * a_FracX, ///< Pointer to the array that stores the X fractional values
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const NOISE_DATATYPE * a_FracY ///< Pointer to the attay that stores the Y fractional values
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) :
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m_Noise(a_Noise),
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m_WorkRnds(&m_Workspace1),
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m_Array(a_Array),
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m_SizeX(a_SizeX),
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m_SizeY(a_SizeY),
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m_FracX(a_FracX),
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m_FracY(a_FracY)
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{
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}
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cNoise::~cNoise()
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void cCubicCell2D::Generate(
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int a_FromX, int a_ToX,
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int a_FromY, int a_ToY
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)
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{
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for (int y = a_FromY; y < a_ToY; y++)
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{
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NOISE_DATATYPE Interp[4];
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NOISE_DATATYPE FracY = m_FracY[y];
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Interp[0] = CubicInterpolate((*m_WorkRnds)[0][0], (*m_WorkRnds)[0][1], (*m_WorkRnds)[0][2], (*m_WorkRnds)[0][3], FracY);
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Interp[1] = CubicInterpolate((*m_WorkRnds)[1][0], (*m_WorkRnds)[1][1], (*m_WorkRnds)[1][2], (*m_WorkRnds)[1][3], FracY);
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Interp[2] = CubicInterpolate((*m_WorkRnds)[2][0], (*m_WorkRnds)[2][1], (*m_WorkRnds)[2][2], (*m_WorkRnds)[2][3], FracY);
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Interp[3] = CubicInterpolate((*m_WorkRnds)[3][0], (*m_WorkRnds)[3][1], (*m_WorkRnds)[3][2], (*m_WorkRnds)[3][3], FracY);
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int idx = y * m_SizeX + a_FromX;
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for (int x = a_FromX; x < a_ToX; x++)
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{
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m_Array[idx++] = CubicInterpolate(Interp[0], Interp[1], Interp[2], Interp[3], m_FracX[x]);
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} // for x
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} // for y
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}
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void cCubicCell2D::InitWorkRnds(int a_FloorX, int a_FloorY)
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{
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m_CurFloorX = a_FloorX;
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m_CurFloorY = a_FloorY;
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for (int x = 0; x < 4; x++)
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{
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int cx = a_FloorX + x - 1;
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for (int y = 0; y < 4; y++)
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{
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int cy = a_FloorY + y - 1;
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(*m_WorkRnds)[x][y] = (NOISE_DATATYPE)m_Noise.IntNoise2D(cx, cy);
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}
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}
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}
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void cCubicCell2D::Move(int a_NewFloorX, int a_NewFloorY)
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{
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// Swap the doublebuffer:
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int OldFloorX = m_CurFloorX;
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int OldFloorY = m_CurFloorY;
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Workspace * OldWorkRnds = m_WorkRnds;
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m_WorkRnds = (m_WorkRnds == &m_Workspace1) ? &m_Workspace2 : &m_Workspace1;
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// Reuse as much of the old workspace as possible:
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int DiffX = OldFloorX - a_NewFloorX;
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int DiffY = OldFloorY - a_NewFloorY;
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for (int x = 0; x < 4; x++)
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{
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int cx = a_NewFloorX + x - 1;
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int OldX = x - DiffX; // Where would this X be in the old grid?
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for (int y = 0; y < 4; y++)
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{
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int cy = a_NewFloorY + y - 1;
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int OldY = y - DiffY; // Where would this Y be in the old grid?
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if ((OldX >= 0) && (OldX < 4) && (OldY >= 0) && (OldY < 4))
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{
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(*m_WorkRnds)[x][y] = (*OldWorkRnds)[OldX][OldY];
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}
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else
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{
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(*m_WorkRnds)[x][y] = (NOISE_DATATYPE)m_Noise.IntNoise2D(cx, cy);
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}
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}
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}
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m_CurFloorX = a_NewFloorX;
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m_CurFloorY = a_NewFloorY;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cNoise:
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cNoise::cNoise(unsigned int a_Seed) :
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m_Seed(a_Seed)
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{
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}
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#if NOISE_USE_SSE
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/****************
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* SSE Random value generator
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@ -61,6 +226,9 @@ __m128 cNoise::SSE_IntNoise2D( int a_X1, int a_Y1, int a_X2, int a_Y2, int a_X3,
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#endif
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/***************
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* Interpolated (and 1 smoothed) noise in 1-dimension
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**/
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@ -71,6 +239,10 @@ float cNoise::LinearNoise1D( float a_X ) const
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return LinearInterpolate( IntNoise( BaseX ), IntNoise( BaseX+1 ), FracX);
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}
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float cNoise::CosineNoise1D( float a_X ) const
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{
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int BaseX = FAST_FLOOR( a_X );
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@ -78,6 +250,10 @@ float cNoise::CosineNoise1D( float a_X ) const
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return CosineInterpolate( IntNoise( BaseX ), IntNoise( BaseX+1 ), FracX);
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}
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float cNoise::CubicNoise1D( float a_X ) const
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{
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int BaseX = FAST_FLOOR( a_X );
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@ -85,11 +261,19 @@ float cNoise::CubicNoise1D( float a_X ) const
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return CubicInterpolate( IntNoise( BaseX-1 ), IntNoise( BaseX ), IntNoise( BaseX+1 ), IntNoise( BaseX+2 ), FracX);
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}
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float cNoise::SmoothNoise1D( int a_X ) const
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{
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return IntNoise(a_X)/2 + IntNoise(a_X-1)/4 + IntNoise(a_X+1)/4;
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}
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/******************
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* Interpolated (and 1 smoothed) noise in 2-dimensions
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**/
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@ -111,6 +295,10 @@ float cNoise::LinearNoise2D( float a_X, float a_Y ) const
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return LinearInterpolate( interp1, interp2, FracY );
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}
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float cNoise::CosineNoise2D( float a_X, float a_Y ) const
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{
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const int BaseX = FAST_FLOOR( a_X );
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@ -363,11 +551,6 @@ void IntArrayLinearInterpolate2D(
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#if NOISE_USE_INLINE
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#include "Noise.inc"
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#endif
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@ -375,3 +558,107 @@ void IntArrayLinearInterpolate2D(
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cCubicNoise:
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cCubicNoise::cCubicNoise(int a_Seed) :
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m_Noise(a_Seed)
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{
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}
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void cCubicNoise::Generate2D(
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NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
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int a_SizeX, int a_SizeY, ///< Size of the array (num doubles), in each direction
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NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array in the X direction
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NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY, ///< Noise-space coords of the array in the Y direction
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NOISE_DATATYPE * a_Workspace ///< Workspace that this function can use and trash
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)
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{
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ASSERT(a_SizeX < MAX_SIZE);
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ASSERT(a_SizeY < MAX_SIZE);
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ASSERT(a_StartX < a_EndX);
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ASSERT(a_StartY < a_EndY);
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// Calculate the integral and fractional parts of each coord:
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int FloorX[MAX_SIZE];
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int FloorY[MAX_SIZE];
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NOISE_DATATYPE FracX[MAX_SIZE];
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NOISE_DATATYPE FracY[MAX_SIZE];
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int SameX[MAX_SIZE];
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int SameY[MAX_SIZE];
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int NumSameX, NumSameY;
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CalcFloorFrac(a_SizeX, a_StartX, a_EndX, FloorX, FracX, SameX, NumSameX);
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CalcFloorFrac(a_SizeY, a_StartY, a_EndY, FloorY, FracY, SameY, NumSameY);
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cCubicCell2D Cell(m_Noise, a_Array, a_SizeX, a_SizeY, FracX, FracY);
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Cell.InitWorkRnds(FloorX[0], FloorY[0]);
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// Calculate query values using Cell:
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int FromY = 0;
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for (int y = 0; y < NumSameY; y++)
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{
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int ToY = FromY + SameY[y];
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int FromX = 0;
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int CurFloorY = FloorY[FromY];
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for (int x = 0; x < NumSameX; x++)
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{
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int ToX = FromX + SameX[x];
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Cell.Generate(FromX, ToX, FromY, ToY);
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Cell.Move(FloorX[ToX], CurFloorY);
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FromX = ToX;
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}
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Cell.Move(FloorX[0], FloorY[ToY]);
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FromY = ToY;
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}
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}
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void cCubicNoise::CalcFloorFrac(
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int a_Size,
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NOISE_DATATYPE a_Start, NOISE_DATATYPE a_End,
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int * a_Floor, NOISE_DATATYPE * a_Frac,
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int * a_Same, int & a_NumSame
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)
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{
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NOISE_DATATYPE val = a_Start;
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NOISE_DATATYPE dif = (a_End - a_Start) / a_Size;
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for (int i = 0; i < a_Size; i++)
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{
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a_Floor[i] = FAST_FLOOR(val);
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a_Frac[i] = val - a_Floor[i];
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val += dif;
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}
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// Mark up the same floor values into a_Same / a_NumSame:
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int CurFloor = a_Floor[0];
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int LastSame = 0;
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a_NumSame = 0;
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for (int i = 1; i < a_Size; i++)
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{
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if (a_Floor[i] != CurFloor)
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{
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a_Same[a_NumSame] = i - LastSame;
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LastSame = i;
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a_NumSame += 1;
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CurFloor = a_Floor[i];
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}
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} // for i - a_Floor[]
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if (LastSame < a_Size)
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{
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a_Same[a_NumSame] = a_Size - LastSame;
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a_NumSame += 1;
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}
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}
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111
source/Noise.h
111
source/Noise.h
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@ -4,6 +4,12 @@
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#define NOISE_USE_INLINE 1
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#define NOISE_USE_SSE 0
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#define NOISE_DATATYPE double
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// Do not touch
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#if NOISE_USE_INLINE
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#ifdef _MSC_VER
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@ -16,7 +22,7 @@
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#endif
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#if NOISE_USE_SSE
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# include <emmintrin.h>
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#include <emmintrin.h>
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#endif
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@ -27,7 +33,6 @@ class cNoise
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{
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public:
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cNoise( unsigned int a_Seed );
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~cNoise();
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#if NOISE_USE_SSE
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__m128 SSE_IntNoise2D( int a_X1, int a_Y1, int a_X2, int a_Y2, int a_X3, int a_Y3, int a_X4, int a_Y4 ) const;
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@ -57,9 +62,9 @@ public:
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void SetSeed( unsigned int a_Seed ) { m_Seed = a_Seed; }
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__NOISE_INLINE__ static float CubicInterpolate( float a_A, float a_B, float a_C, float a_D, float a_Pct );
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__NOISE_INLINE__ static float CosineInterpolate( float a_A, float a_B, float a_Pct );
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__NOISE_INLINE__ static float LinearInterpolate( float a_A, float a_B, float a_Pct );
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__NOISE_INLINE__ static float CubicInterpolate (float a_A, float a_B, float a_C, float a_D, float a_Pct);
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__NOISE_INLINE__ static float CosineInterpolate(float a_A, float a_B, float a_Pct);
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__NOISE_INLINE__ static float LinearInterpolate(float a_A, float a_B, float a_Pct);
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private:
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@ -140,3 +145,99 @@ template<typename TYPE> void ArrayLinearInterpolate2D(
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class cCubicNoise
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{
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public:
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static const int MAX_SIZE = 512; ///< Maximum size of each dimension of the query arrays.
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cCubicNoise(int a_Seed);
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void Generate1D(
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NOISE_DATATYPE * a_Array, ///< Array to generate into
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int a_SizeX, ///< Count of the array
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NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array
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NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
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);
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void Generate2D(
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NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
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int a_SizeX, int a_SizeY, ///< Count of the array, in each direction
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NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array in the X direction
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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
|
||||
);
|
||||
|
||||
|
||||
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
|
||||
);
|
||||
|
||||
protected:
|
||||
typedef NOISE_DATATYPE Workspace1D[4];
|
||||
typedef NOISE_DATATYPE Workspace2D[4][4];
|
||||
|
||||
cNoise m_Noise; // Used for integral rnd values
|
||||
|
||||
/// 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
|
||||
);
|
||||
|
||||
void UpdateWorkRnds2DX(
|
||||
Workspace2D & a_WorkRnds,
|
||||
Workspace1D & a_Interps,
|
||||
int a_LastFloorX, int a_NewFloorX,
|
||||
int a_FloorY,
|
||||
NOISE_DATATYPE a_FractionY
|
||||
);
|
||||
} ;
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class cPerlinNoise
|
||||
{
|
||||
public:
|
||||
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
|
||||
);
|
||||
|
||||
|
||||
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
|
||||
);
|
||||
|
||||
|
||||
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
|
||||
);
|
||||
} ;
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue