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Made some functions in cChunk and cNoise inline, this should significantly increase chunk generation speed

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git-svn-id: http://mc-server.googlecode.com/svn/trunk@115 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
faketruth
2011-12-26 02:13:40 +00:00
parent 4c76ca986c
commit c35db25269
9 changed files with 108 additions and 73 deletions
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54
source/cNoise.cpp
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@@ -1,7 +1,9 @@
#include "cNoise.h"
#include <math.h>
#if NOISE_USE_SSE
#include <smmintrin.h> //_mm_mul_epi32
#endif
#define FAST_FLOOR( x ) ( (x) < 0 ? ((int)x)-1 : ((int)x) )
@@ -15,29 +17,7 @@ cNoise::~cNoise()
{
}
/****************
* Random value generator
**/
float cNoise::IntNoise( int a_X ) const
{
int x = ((a_X*m_Seed)<<13) ^ a_X;
return ( 1.0f - ( (x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0f);
}
float 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 ( 1.0f - ( (n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0f);
}
float 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 ( 1.0f - ( (n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0f);
}
#if NOISE_USE_SSE
/****************
* SSE Random value generator
**/
@@ -71,6 +51,7 @@ __m128 cNoise::SSE_IntNoise2D( int a_X1, int a_Y1, int a_X2, int a_Y2, int a_X3,
return Result4;
}
#endif
/***************
@@ -166,6 +147,7 @@ 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
{
const int BaseX = FAST_FLOOR( a_X );
@@ -185,6 +167,7 @@ float cNoise::SSE_CubicNoise2D( float a_X, float a_Y ) const
const float FracY = (a_Y) - BaseY;
return CubicInterpolate( AllInterp.p[0], AllInterp.p[1], AllInterp.p[2], AllInterp.p[3], FracY );
}
#endif
/******************
* Interpolated (and 1 smoothed) noise in 3-dimensions
@@ -287,16 +270,8 @@ float cNoise::CubicNoise3D( float a_X, float a_Y, float a_Z ) const
/******************
* Private
**/
float cNoise::CubicInterpolate( float a_A, float a_B, float a_C, float a_D, float a_Pct ) const
{
float P = (a_D - a_C) - (a_A - a_B);
float Q = (a_A - a_B) - P;
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;
}
#if NOISE_USE_SSE
__m128 cNoise::CubicInterpolate4( const __m128 & a_A, const __m128 & a_B, const __m128 & a_C, const __m128 & a_D, float a_Pct ) const
{
const __m128 P = _mm_sub_ps( _mm_sub_ps( a_D, a_C ), _mm_sub_ps( a_A, a_B ) );
@@ -309,15 +284,8 @@ __m128 cNoise::CubicInterpolate4( const __m128 & a_A, const __m128 & a_B, const
return _mm_add_ps( _mm_add_ps( _mm_add_ps( _mm_mul_ps(P, Pct3), _mm_mul_ps( Q, Pct2 ) ), _mm_mul_ps( R, Pct ) ), a_B );
}
#endif
float cNoise::CosineInterpolate( float a_A, float a_B, float a_Pct ) const
{
const float ft = a_Pct * 3.1415927f;
const float f = (1.f - cosf(ft)) * 0.5f;
return a_A*(1-f) + a_B*f;
}
float cNoise::LinearInterpolate( float a_A, float a_B, float a_Pct ) const
{
return a_A*(1.f-a_Pct) + a_B*a_Pct;
}
#if NOISE_USE_INLINE
# include "cNoise.inc"
#endif