81245a9c43
https://github.com/Overdrivr/ZNoise Former-commit-id: 3f7be1c8fd14e074826ca667676412ea4989621c [formerly 882d0bdad12c264766dc00869ac07bbecbee7306] Former-commit-id: b12a4654bb5b9ff3fdd474704d66aa10fd2d756d
57 lines
1.0 KiB
C++
57 lines
1.0 KiB
C++
// Copyright (C) 2016 Rémi Bèges
|
|
// This file is part of the "Nazara Engine - Noise module"
|
|
// For conditions of distribution and use, see copyright notice in Config.hpp
|
|
|
|
#include <Nazara/Noise/MixerBase.hpp>
|
|
#include <cmath>
|
|
#include <Nazara/Noise/Debug.hpp>
|
|
|
|
namespace Nz
|
|
{
|
|
MixerBase::MixerBase() :
|
|
m_hurst(1.2f),
|
|
m_lacunarity(5.f),
|
|
m_octaves(3.f)
|
|
{
|
|
Recompute();
|
|
}
|
|
|
|
float MixerBase::GetHurstParameter() const
|
|
{
|
|
return m_hurst;
|
|
}
|
|
|
|
float MixerBase::GetLacunarity() const
|
|
{
|
|
return m_lacunarity;
|
|
}
|
|
|
|
float MixerBase::GetOctaveNumber() const
|
|
{
|
|
return m_octaves;
|
|
}
|
|
|
|
void MixerBase::SetParameters(float hurst, float lacunarity, float octaves)
|
|
{
|
|
m_hurst = hurst;
|
|
m_lacunarity = lacunarity;
|
|
m_octaves = octaves;
|
|
|
|
Recompute();
|
|
}
|
|
|
|
void MixerBase::Recompute()
|
|
{
|
|
float frequency = 1.0;
|
|
m_sum = 0.f;
|
|
m_exponent_array.clear();
|
|
|
|
for (int i(0) ; i < static_cast<int>(m_octaves) ; ++i)
|
|
{
|
|
m_exponent_array.push_back(std::pow( frequency, -m_hurst ));
|
|
frequency *= m_lacunarity;
|
|
m_sum += m_exponent_array.at(i);
|
|
}
|
|
}
|
|
}
|