// RidgedNoise.h
// Implements the cRidgedNoise template class that generates ridged noise based on another noise provider.
#pragma once
template <typename N>
class cRidgedNoise
{
public:
/** Creates a new instance with the seed set to 0. */
cRidgedNoise(void):
m_Noise(0)
{
}
/** Creates a new instance with the specified seed. */
cRidgedNoise(int a_Seed):
m_Noise(a_Seed)
{
}
/** Sets the seed for the underlying noise. */
void SetSeed(int a_Seed)
{
m_Noise.SetSeed(a_Seed);
}
/** Fills a 2D array with the values of the noise. */
void Generate2D(
NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
int a_SizeX, int a_SizeY, ///< Count of the array, in each direction
NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array in the X direction
NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY ///< Noise-space coords of the array in the Y direction
) const
{
int ArrayCount = a_SizeX * a_SizeY;
m_Noise.Generate2D(
a_Array, a_SizeX, a_SizeY,
a_StartX, a_EndX,
a_StartY, a_EndY
);
for (int i = 0; i < ArrayCount; i++)
{
a_Array[i] = std::abs(a_Array[i]);
}
}
/** Fills a 3D array with the values of the noise. */
void Generate3D(
NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
int a_SizeX, int a_SizeY, int a_SizeZ, ///< Count of the array, in each direction
NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array in the X direction
NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY, ///< Noise-space coords of the array in the Y direction
NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ ///< Noise-space coords of the array in the Z direction
) const
{
int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
m_Noise.Generate2D(
a_Array, a_SizeX, a_SizeY, a_SizeZ,
a_StartX, a_EndX,
a_StartY, a_EndY,
a_StartZ, a_EndZ
);
for (int i = 0; i < ArrayCount; i++)
{
a_Array[i] = std::abs(a_Array[i]);
}
}
protected:
N m_Noise;
} ;
