flewkey/cuberite-2a
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Using SSE instructions for noise (terrain generation)

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Unfortunately the noise functions is only like 7% faster, so you won't even notice

git-svn-id: http://mc-server.googlecode.com/svn/trunk@9 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
faketruth
2011-10-25 18:57:38 +00:00
parent cf94994f8e
commit 625c30d8bd
4 changed files with 85 additions and 10 deletions
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18
source/cChunk.cpp
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@@ -678,13 +678,13 @@ void cChunk::SpreadLight(char* a_LightBuffer)
float GetNoise( float x, float y, cNoise & a_Noise )
{
float oct1 = a_Noise.CubicNoise2D( x*cGenSettings::HeightFreq1, y*cGenSettings::HeightFreq1 )*cGenSettings::HeightAmp1;
float oct2 = a_Noise.CubicNoise2D( x*cGenSettings::HeightFreq2, y*cGenSettings::HeightFreq2 )*cGenSettings::HeightAmp2;
float oct3 = a_Noise.CubicNoise2D( x*cGenSettings::HeightFreq3, y*cGenSettings::HeightFreq3 )*cGenSettings::HeightAmp3;
float oct1 = a_Noise.SSE_CubicNoise2D( x*cGenSettings::HeightFreq1, y*cGenSettings::HeightFreq1 )*cGenSettings::HeightAmp1;
float oct2 = a_Noise.SSE_CubicNoise2D( x*cGenSettings::HeightFreq2, y*cGenSettings::HeightFreq2 )*cGenSettings::HeightAmp2;
float oct3 = a_Noise.SSE_CubicNoise2D( x*cGenSettings::HeightFreq3, y*cGenSettings::HeightFreq3 )*cGenSettings::HeightAmp3;
float height = a_Noise.CubicNoise2D( x*0.1f, y*0.1f )*2;
float height = a_Noise.SSE_CubicNoise2D( x*0.1f, y*0.1f )*2;
float flatness = ((a_Noise.CubicNoise2D( x*0.5f, y*0.5f ) + 1.f ) * 0.5f) * 1.1f; // 0 ... 1.5
float flatness = ((a_Noise.SSE_CubicNoise2D( x*0.5f, y*0.5f ) + 1.f ) * 0.5f) * 1.1f; // 0 ... 1.5
flatness *= flatness * flatness;
return (oct1 + oct2 + oct3) * flatness + height;
@@ -836,8 +836,8 @@ void cChunk::GenerateTerrain()
// int yy = TopY;
int zz = z + m_PosZ*16;
float val1 = m_Noise.CubicNoise2D( xx*0.1f, zz*0.1f );
float val2 = m_Noise.CubicNoise2D( xx*0.01f, zz*0.01f );
float val1 = m_Noise.SSE_CubicNoise2D( xx*0.1f, zz*0.1f );
float val2 = m_Noise.SSE_CubicNoise2D( xx*0.01f, zz*0.01f );
if( m_BlockType[index] == SandID )
{
if( (val1 + val2 > 0.f) && (rand()%128) > 124 && m_BlockType[index] == E_BLOCK_SAND )
@@ -852,8 +852,8 @@ void cChunk::GenerateTerrain()
}
else if( m_BlockType[index] == GrassID )
{
float val3 = m_Noise.CubicNoise2D( xx*0.01f+10, zz*0.01f+10 );
float val4 = m_Noise.CubicNoise2D( xx*0.05f+20, zz*0.05f+20 );
float val3 = m_Noise.SSE_CubicNoise2D( xx*0.01f+10, zz*0.01f+10 );
float val4 = m_Noise.SSE_CubicNoise2D( xx*0.05f+20, zz*0.05f+20 );
if( val1 + val2 > 0.2f && (rand()%128) > 124 )
cRoot::Get()->GetWorld()->GrowTree( xx, TopY, zz );
else if( val3 > 0.2f && (rand()%128) > 124 )