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#include "PerlinNoise_SPU.h"
#include "..\Common\DmaData.h"
#include <alloca.h>
int64_t lfloor(double v)
{
int64_t i = (int64_t) v;
return v < i ? i - 1 : i;
}
//
// class PPUStoreArray
// {
// static const int sc_cacheSize = 1024;
// double m_localCache[sc_cacheSize];
// double* m_pDataPPU;
// int m_cachePos;
// int m_ppuPos;
//
// public:
// PPUStoreArray(uintptr_t pDataPPU) { m_pDataPPU = (double*)pDataPPU; m_cachePos = 0; m_ppuPos = 0; flush();}
//
// void store(int val)
// {
// m_localCache[m_cachePos] = val;
// m_cachePos++;
// if(m_cachePos >= sc_cacheSize)
// flush();
// }
//
// void flush()
// {
// if(m_cachePos > 0)
// {
// // dma the local cache back to PPU and start again
// // spu_print("DMAing %d bytes from 0x%08x(SPU) to 0x%08x(PPU)\n",(int)( m_cachePos*sizeof(int)), (int)m_localCache, (int)&m_pDataPPU[m_ppuPos]);
// DmaData_SPU::put(m_localCache, (uintptr_t)&m_pDataPPU[m_ppuPos], DmaData_SPU::roundUpDMASize(m_cachePos*sizeof(double)));
// m_ppuPos += m_cachePos;
// m_cachePos = 0;
// }
// for(int i=0;i<sc_cacheSize;i++)
// m_localCache[i] = 0.0;
// }
// int getSize() { return m_ppuPos; }
// };
void PerlinNoise_SPU::getRegion(double* buffer, int x, int y, int z, int xSize, int ySize, int zSize, double xScale, double yScale, double zScale)
{
// if (buffer.data == NULL) buffer = doubleArray(xSize * ySize * zSize);
int bufLen = xSize * ySize * zSize;
int bufMemSize = DmaData_SPU::roundUpDMASize(bufLen*sizeof(double));
double* localBuffer = (double*)alloca(bufMemSize);
for (unsigned int i = 0; i < bufLen; i++)
localBuffer[i] = 0;
double pow = 1;
for (int i = 0; i < levels; i++)
{
// value += noiseLevels[i].getValue(x * pow, y * pow, z * pow) / pow;
double xx = x * pow * xScale;
double yy = y * pow * yScale;
double zz = z * pow * zScale;
int64_t xb = lfloor(xx);
int64_t zb = lfloor(zz);
xx -= xb;
zz -= zb;
xb %= 16777216;
zb %= 16777216;
xx += xb;
zz += zb;
noiseLevels[i].add(localBuffer, xx, yy, zz, xSize, ySize, zSize, xScale * pow, yScale * pow, zScale * pow, pow);
pow /= 2;
}
DmaData_SPU::putAndWait(localBuffer,(uintptr_t)buffer, bufMemSize);
}
void PerlinNoise_SPU::getRegion(double* sr, int x, int z, int xSize, int zSize, double xScale, double zScale, double pow)
{
getRegion(sr, x, 10, z, xSize, 1, zSize, xScale, 1, zScale);
}
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