FactoryCraft-Server/FactoryCraft/RandNoise.cpp

#include "RandNoise.h"

#include <Random.h>
#include <stdlib.h>

#include "Constants.h"
#include "FastNoiseLite.h"
#include "FastNoiseWrapper.h"

RandNoise::RandNoise(int seed)
    : Noise(),
      seed(seed)
{
    srand(seed);
    table = new short[RandNoiseTableSize];
    for (int i = 0; i < RandNoiseTableSize; i++)
        table[i] = (short)rand();
}

RandNoise::~RandNoise()
{
    delete[] table;
}

int RandNoise::getSeed() const
{
    return seed;
}

double RandNoise::getNoise(double x, double y, double z)
{
    int index = seed % RandNoiseTableSize;
    index = abs(table[index] + (int)x) % RandNoiseTableSize;
    index = abs(table[index] + (int)y) % RandNoiseTableSize;
    index = abs(table[index] + (int)z) % RandNoiseTableSize;
    return (double)table[index]
         / RAND_MAX;
}