From 1cb756cbf2611693ec21eec9fd98e4367bb7d918 Mon Sep 17 00:00:00 2001 From: "madmaxoft@gmail.com" Date: Wed, 22 Feb 2012 17:04:04 +0000 Subject: Noise function optimization (chunk generation now about 1.5x faster :) git-svn-id: http://mc-server.googlecode.com/svn/trunk@317 0a769ca7-a7f5-676a-18bf-c427514a06d6 --- source/cNoise.cpp | 21 ++++++++++++++------- source/cNoise.h | 20 ++++++++++++++++++-- source/cNoise.inc | 2 +- 3 files changed, 33 insertions(+), 10 deletions(-) (limited to 'source') diff --git a/source/cNoise.cpp b/source/cNoise.cpp index 4221d9218..653b9e95c 100644 --- a/source/cNoise.cpp +++ b/source/cNoise.cpp @@ -129,18 +129,21 @@ float cNoise::CosineNoise2D( float a_X, float a_Y ) const return CosineInterpolate( interp1, interp2, FracY ); } + + + + float cNoise::CubicNoise2D( float a_X, float a_Y ) const { const int BaseX = FAST_FLOOR( a_X ); const int BaseY = FAST_FLOOR( a_Y ); - const float 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 float 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 float FracX = (a_X) - BaseX; @@ -154,6 +157,10 @@ float cNoise::CubicNoise2D( float a_X, float a_Y ) const return CubicInterpolate( interp1, interp2, interp3, interp4, FracY ); } + + + + #if NOISE_USE_SSE float cNoise::SSE_CubicNoise2D( float a_X, float a_Y ) const { diff --git a/source/cNoise.h b/source/cNoise.h index d4da677f3..a0283fc8d 100644 --- a/source/cNoise.h +++ b/source/cNoise.h @@ -6,15 +6,23 @@ // Do not touch #if NOISE_USE_INLINE -# define __NOISE_INLINE__ inline + #ifdef _MSC_VER + #define __NOISE_INLINE__ __forceinline + #else + #define __NOISE_INLINE__ inline + #endif // _MSC_VER #else -# define __NOISE_INLINE__ + #define __NOISE_INLINE__ #endif #if NOISE_USE_SSE # include #endif + + + + class cNoise { public: @@ -55,6 +63,14 @@ private: unsigned int m_Seed; }; + + + + #if NOISE_USE_INLINE # include "cNoise.inc" #endif + + + + diff --git a/source/cNoise.inc b/source/cNoise.inc index a63bb0c2f..fd52fef37 100644 --- a/source/cNoise.inc +++ b/source/cNoise.inc @@ -36,7 +36,7 @@ float cNoise::CubicInterpolate( float a_A, float a_B, float a_C, float a_D, floa float R = a_C - a_A; float S = a_B; - return P*(a_Pct*a_Pct*a_Pct) + Q*(a_Pct*a_Pct) + R*a_Pct + S; + return ((P * a_Pct + Q) * a_Pct + R) * a_Pct + S; } float cNoise::CosineInterpolate( float a_A, float a_B, float a_Pct ) const -- cgit v1.2.3