diff options
Diffstat (limited to '')
| -rw-r--r-- | source/cNoise.cpp | 74 |
1 files changed, 73 insertions, 1 deletions
diff --git a/source/cNoise.cpp b/source/cNoise.cpp index 2dd26e5aa..b4e7a5752 100644 --- a/source/cNoise.cpp +++ b/source/cNoise.cpp @@ -183,6 +183,10 @@ float cNoise::SSE_CubicNoise2D( float a_X, float a_Y ) const } #endif + + + + /****************** * Interpolated (and 1 smoothed) noise in 3-dimensions **/ @@ -216,6 +220,10 @@ float cNoise::CosineNoise3D( float a_X, float a_Y, float a_Z ) const return CosineInterpolate( interp1, interp2, FracZ ); } + + + + float cNoise::CubicNoise3D( float a_X, float a_Y, float a_Z ) const { const int BaseX = FAST_FLOOR( a_X ); @@ -281,6 +289,10 @@ float cNoise::CubicNoise3D( float a_X, float a_Y, float a_Z ) const return CubicInterpolate( yinterp1, yinterp2, yinterp3, yinterp4, FracZ ); } + + + + /****************** * Private **/ @@ -300,6 +312,66 @@ __m128 cNoise::CubicInterpolate4( const __m128 & a_A, const __m128 & a_B, const } #endif + + + + +void IntArrayLinearInterpolate2D( + int * a_Array, + int a_SizeX, int a_SizeY, // Dimensions of the array + int a_AnchorStepX, int a_AnchorStepY // Distances between the anchor points in each direction +) +{ + // First interpolate columns where the anchor points are: + int LastYCell = a_SizeY - a_AnchorStepY; + for (int y = 0; y < LastYCell; y += a_AnchorStepY) + { + int Idx = a_SizeX * y; + for (int x = 0; x < a_SizeX; x += a_AnchorStepX) + { + int StartValue = a_Array[Idx]; + int EndValue = a_Array[Idx + a_SizeX * a_AnchorStepY]; + int Diff = EndValue - StartValue; + for (int CellY = 1; CellY < a_AnchorStepY; CellY++) + { + a_Array[Idx + a_SizeX * CellY] = StartValue + CellY * Diff / a_AnchorStepY; + } // for CellY + Idx += a_AnchorStepX; + } // for x + } // for y + + // Now interpolate in rows, each row has values in the anchor columns + int LastXCell = a_SizeX - a_AnchorStepX; + for (int y = 0; y < a_SizeY; y++) + { + int Idx = a_SizeX * y; + for (int x = 0; x < LastXCell; x += a_AnchorStepX) + { + int StartValue = a_Array[Idx]; + int EndValue = a_Array[Idx + a_AnchorStepX]; + int Diff = EndValue - StartValue; + for (int CellX = 1; CellX < a_AnchorStepX; CellX++) + { + a_Array[Idx + CellX] = StartValue + CellX * Diff / a_AnchorStepX; + } // for CellY + Idx += a_AnchorStepX; + } + } +} + + + + + + + + + + #if NOISE_USE_INLINE # include "cNoise.inc" -#endif
\ No newline at end of file +#endif + + + + |