From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 .../PS3/SPU_Tasks/PerlinNoise/PerlinNoise_SPU.cpp  | 85 ++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Minecraft.Client/PS3/SPU_Tasks/PerlinNoise/PerlinNoise_SPU.cpp

(limited to 'Minecraft.Client/PS3/SPU_Tasks/PerlinNoise/PerlinNoise_SPU.cpp')

diff --git a/Minecraft.Client/PS3/SPU_Tasks/PerlinNoise/PerlinNoise_SPU.cpp b/Minecraft.Client/PS3/SPU_Tasks/PerlinNoise/PerlinNoise_SPU.cpp
new file mode 100644
index 00000000..fc5322b1
--- /dev/null
+++ b/Minecraft.Client/PS3/SPU_Tasks/PerlinNoise/PerlinNoise_SPU.cpp
@@ -0,0 +1,85 @@
+
+
+
+#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);
+}
\ No newline at end of file
-- 
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