first commit

Minecraft.World/PerlinNoise.cpp

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+#include "stdafx.h"
+#include "PerlinNoise.h"
+#include "Mth.h"
+
+PerlinNoise::PerlinNoise(int levels)
+{
+	Random random;
+	init(&random, levels);
+}
+
+PerlinNoise::PerlinNoise(Random *random, int levels)
+{
+	init(random, levels);
+}
+
+void PerlinNoise::init(Random *random, int levels)
+{
+	MemSect(2);
+    this->levels = levels;
+    noiseLevels = new ImprovedNoise *[levels];
+    for (int i = 0; i < levels; i++)
+	{
+        noiseLevels[i] = new ImprovedNoise(random);
+    }
+	MemSect(0);
+}
+
+PerlinNoise::~PerlinNoise()
+{
+	for( int i = 0; i < levels; i++ )
+	{
+		delete noiseLevels[i];
+	}
+	delete [] noiseLevels;
+}
+
+double PerlinNoise::getValue(double x, double y)
+{
+    double value = 0;
+    double pow = 1;
+
+    for (int i = 0; i < levels; i++)
+	{
+        value += noiseLevels[i]->getValue(x * pow, y * pow) / pow;
+        pow /= 2;
+    }
+
+    return value;
+}
+
+double PerlinNoise::getValue(double x, double y, double z)
+{
+    double value = 0;
+    double pow = 1;
+
+    for (int i = 0; i < levels; i++)
+	{
+        value += noiseLevels[i]->getValue(x * pow, y * pow, z * pow) / pow;
+        pow /= 2;
+    }
+
+    return value;
+}
+
+doubleArray PerlinNoise::getRegion(doubleArray 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);
+    else for (unsigned int i = 0; i < buffer.length; i++)
+        buffer[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 xb = Mth::lfloor(xx);
+        __int64 zb = Mth::lfloor(zz);
+        xx -= xb;
+        zz -= zb;
+        xb %= 16777216;
+        zb %= 16777216;
+        xx += xb;
+        zz += zb;
+        noiseLevels[i]->add(buffer, xx, yy, zz, xSize, ySize, zSize, xScale * pow, yScale * pow, zScale * pow, pow);
+        pow /= 2;
+    }
+
+    return buffer;
+}
+
+doubleArray PerlinNoise::getRegion(doubleArray sr, int x, int z, int xSize, int zSize, double xScale, double zScale, double pow)
+{
+	return getRegion(sr, x, 10, z, xSize, 1, zSize, xScale, 1, zScale);
+}