087b7e7abf
This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.
This reverts commit a9be52c41a.
98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
#include "stdafx.h"
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#include "PerlinNoise.h"
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#include "Mth.h"
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PerlinNoise::PerlinNoise(int levels)
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{
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Random random;
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init(&random, levels);
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}
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PerlinNoise::PerlinNoise(Random *random, int levels)
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{
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init(random, levels);
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}
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void PerlinNoise::init(Random *random, int levels)
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{
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MemSect(2);
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this->levels = levels;
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noiseLevels = new ImprovedNoise *[levels];
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for (int i = 0; i < levels; i++)
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{
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noiseLevels[i] = new ImprovedNoise(random);
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}
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MemSect(0);
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}
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PerlinNoise::~PerlinNoise()
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{
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for( int i = 0; i < levels; i++ )
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{
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delete noiseLevels[i];
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}
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delete [] noiseLevels;
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}
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double PerlinNoise::getValue(double x, double y)
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{
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double value = 0;
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double pow = 1;
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for (int i = 0; i < levels; i++)
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{
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value += noiseLevels[i]->getValue(x * pow, y * pow) / pow;
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pow /= 2;
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}
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return value;
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}
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double PerlinNoise::getValue(double x, double y, double z)
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{
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double value = 0;
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double pow = 1;
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for (int i = 0; i < levels; i++)
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{
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value += noiseLevels[i]->getValue(x * pow, y * pow, z * pow) / pow;
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pow /= 2;
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}
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return value;
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}
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doubleArray PerlinNoise::getRegion(doubleArray buffer, int x, int y, int z, int xSize, int ySize, int zSize, double xScale, double yScale, double zScale)
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{
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if (buffer.data == NULL) buffer = doubleArray(xSize * ySize * zSize);
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else for (unsigned int i = 0; i < buffer.length; i++)
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buffer[i] = 0;
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double pow = 1;
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for (int i = 0; i < levels; i++)
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{
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// value += noiseLevels[i].getValue(x * pow, y * pow, z * pow) / pow;
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double xx = x * pow * xScale;
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double yy = y * pow * yScale;
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double zz = z * pow * zScale;
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int64_t xb = Mth::lfloor(xx);
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int64_t zb = Mth::lfloor(zz);
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xx -= xb;
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zz -= zb;
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xb %= 16777216;
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zb %= 16777216;
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xx += xb;
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zz += zb;
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noiseLevels[i]->add(buffer, xx, yy, zz, xSize, ySize, zSize, xScale * pow, yScale * pow, zScale * pow, pow);
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pow /= 2;
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}
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return buffer;
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}
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doubleArray PerlinNoise::getRegion(doubleArray sr, int x, int z, int xSize, int zSize, double xScale, double zScale, double pow)
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{
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return getRegion(sr, x, 10, z, xSize, 1, zSize, xScale, 1, zScale);
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} |