noise.cpp File Reference

#include <cmath>
#include "noise.h"
#include <iostream>
#include <cstring>
#include "debug.h"
#include "util/numeric.h"
#include "util/string.h"
#include "exceptions.h"

Include dependency graph for noise.cpp:

Macros
#define	NOISE_MAGIC_X   1619
#define	NOISE_MAGIC_Y   31337
#define	NOISE_MAGIC_Z   52591
#define	NOISE_MAGIC_SEED   1013
#define	idx(x, y)   ((y) * nlx + (x))
#define	idx(x, y, z)   ((z) * nly * nlx + (y) * nlx + (x))

Typedefs
typedef float(*	Interp2dFxn) (float v00, float v10, float v01, float v11, float x, float y)
typedef float(*	Interp3dFxn) (float v000, float v100, float v010, float v110, float v001, float v101, float v011, float v111, float x, float y, float z)

Functions
float	noise2d (int x, int y, s32 seed)
float	noise3d (int x, int y, int z, s32 seed)
float	dotProduct (float vx, float vy, float wx, float wy)
float	linearInterpolation (float v0, float v1, float t)
float	biLinearInterpolation (float v00, float v10, float v01, float v11, float x, float y)
float	biLinearInterpolationNoEase (float v00, float v10, float v01, float v11, float x, float y)
float	triLinearInterpolation (float v000, float v100, float v010, float v110, float v001, float v101, float v011, float v111, float x, float y, float z)
float	triLinearInterpolationNoEase (float v000, float v100, float v010, float v110, float v001, float v101, float v011, float v111, float x, float y, float z)
float	noise2d_gradient (float x, float y, s32 seed, bool eased)
float	noise3d_gradient (float x, float y, float z, s32 seed, bool eased)
float	noise2d_perlin (float x, float y, s32 seed, int octaves, float persistence, bool eased)
float	noise2d_perlin_abs (float x, float y, s32 seed, int octaves, float persistence, bool eased)
float	noise3d_perlin (float x, float y, float z, s32 seed, int octaves, float persistence, bool eased)
float	noise3d_perlin_abs (float x, float y, float z, s32 seed, int octaves, float persistence, bool eased)
float	contour (float v)
float	NoisePerlin2D (NoiseParams *np, float x, float y, s32 seed)
float	NoisePerlin3D (NoiseParams *np, float x, float y, float z, s32 seed)

Variables
FlagDesc	flagdesc_noiseparams []

Macro Definition Documentation

idx [1/2]

#define idx	(		x,
			y
	)		((y) * nlx + (x))

idx [2/2]

#define idx	(		x,
			y,
			z
	)		((z) * nly * nlx + (y) * nlx + (x))

NOISE_MAGIC_SEED

#define NOISE_MAGIC_SEED   1013

NOISE_MAGIC_X

#define NOISE_MAGIC_X   1619

NOISE_MAGIC_Y

#define NOISE_MAGIC_Y   31337

NOISE_MAGIC_Z

#define NOISE_MAGIC_Z   52591

Typedef Documentation

Interp2dFxn

typedef float(* Interp2dFxn) (float v00, float v10, float v01, float v11, float x, float y)

Interp3dFxn

typedef float(* Interp3dFxn) (float v000, float v100, float v010, float v110, float v001, float v101, float v011, float v111, float x, float y, float z)

Function Documentation

biLinearInterpolation()

float biLinearInterpolation ( float  v00, float  v10, float  v01, float  v11, float  x, float  y  )

inline

References easeCurve(), and linearInterpolation().

Referenced by Noise::gradientMap2D(), and noise2d_gradient().

Here is the call graph for this function:

Here is the caller graph for this function:

biLinearInterpolationNoEase()

float biLinearInterpolationNoEase ( float  v00, float  v10, float  v01, float  v11, float  x, float  y  )

inline

References linearInterpolation().

Referenced by Noise::gradientMap2D(), noise2d_gradient(), triLinearInterpolation(), and triLinearInterpolationNoEase().

Here is the call graph for this function:

Here is the caller graph for this function:

contour()

float contour

(

float

v

)

Referenced by OreVein::generate(), and CavesNoiseIntersection::generateCaves().

Here is the caller graph for this function:

dotProduct()

float dotProduct ( float  vx, float  vy, float  wx, float  wy  )

inline

linearInterpolation()

float linearInterpolation ( float  v0, float  v1, float  t  )

inline

Referenced by biLinearInterpolation(), biLinearInterpolationNoEase(), triLinearInterpolation(), and triLinearInterpolationNoEase().

Here is the caller graph for this function:

noise2d()

float noise2d	(	int	x,
		int	y,
		s32	seed
	)

References NOISE_MAGIC_SEED, NOISE_MAGIC_X, NOISE_MAGIC_Y, and seed.

Referenced by MapgenV6::getBiome(), Noise::gradientMap2D(), and noise2d_gradient().

Here is the caller graph for this function:

noise2d_gradient()

float noise2d_gradient	(	float	x,
		float	y,
		s32	seed,
		bool	eased
	)

References biLinearInterpolation(), biLinearInterpolationNoEase(), myfloor, noise2d(), and seed.

Referenced by noise2d_perlin(), noise2d_perlin_abs(), and NoisePerlin2D().

Here is the call graph for this function:

Here is the caller graph for this function:

noise2d_perlin()

float noise2d_perlin	(	float	x,
		float	y,
		s32	seed,
		int	octaves,
		float	persistence,
		bool	eased
	)

References noise2d_gradient(), and seed.

Referenced by Clouds::gridFilled().

Here is the call graph for this function:

Here is the caller graph for this function:

noise2d_perlin_abs()

float noise2d_perlin_abs	(	float	x,
		float	y,
		s32	seed,
		int	octaves,
		float	persistence,
		bool	eased
	)

References noise2d_gradient(), and seed.

Here is the call graph for this function:

noise3d()

float noise3d	(	int	x,
		int	y,
		int	z,
		s32	seed
	)

References NOISE_MAGIC_SEED, NOISE_MAGIC_X, NOISE_MAGIC_Y, NOISE_MAGIC_Z, and seed.

Referenced by MapBlockMesh::MapBlockMesh(), Noise::gradientMap3D(), and noise3d_gradient().

Here is the caller graph for this function:

noise3d_gradient()

float noise3d_gradient	(	float	x,
		float	y,
		float	z,
		s32	seed,
		bool	eased
	)

References myfloor, noise3d(), seed, triLinearInterpolation(), and triLinearInterpolationNoEase().

Referenced by noise3d_perlin(), noise3d_perlin_abs(), and NoisePerlin3D().

Here is the call graph for this function:

Here is the caller graph for this function:

noise3d_perlin()

float noise3d_perlin	(	float	x,
		float	y,
		float	z,
		s32	seed,
		int	octaves,
		float	persistence,
		bool	eased
	)

References noise3d_gradient(), and seed.

Here is the call graph for this function:

noise3d_perlin_abs()

float noise3d_perlin_abs	(	float	x,
		float	y,
		float	z,
		s32	seed,
		int	octaves,
		float	persistence,
		bool	eased
	)

References noise3d_gradient(), and seed.

Here is the call graph for this function:

NoisePerlin2D()

float NoisePerlin2D	(	NoiseParams *	np,
		float	x,
		float	y,
		s32	seed
	)

References NoiseParams::flags, NoiseParams::lacunarity, noise2d_gradient(), NOISE_FLAG_ABSVALUE, NOISE_FLAG_DEFAULTS, NOISE_FLAG_EASED, NoiseParams::octaves, NoiseParams::offset, NoiseParams::persist, NoiseParams::scale, NoiseParams::seed, seed, and NoiseParams::spread.

Referenced by MapgenV7::baseTerrainLevelAtPoint(), BiomeGenOriginal::calcBiomeAtPoint(), MapgenV6::generateCaves(), MapgenV6::getHaveAppleTree(), BiomeManager::getHeatAtPosOriginal(), BiomeManager::getHumidityAtPosOriginal(), MapgenV7::getMountainTerrainAtPoint(), MapgenCarpathian::getSpawnLevelAtPoint(), MapgenFlat::getSpawnLevelAtPoint(), MapgenFractal::getSpawnLevelAtPoint(), MapgenV5::getSpawnLevelAtPoint(), MapgenV7::getSpawnLevelAtPoint(), MapgenValleys::getSpawnLevelAtPoint(), MapgenV6::getTreeAmount(), LuaPerlinNoise::l_get_2d(), NoisePerlin2D_PO(), Decoration::placeDeco(), and TestNoise::testNoise2dPoint().

Here is the call graph for this function:

Here is the caller graph for this function:

NoisePerlin3D()

float NoisePerlin3D	(	NoiseParams *	np,
		float	x,
		float	y,
		float	z,
		s32	seed
	)

References NoiseParams::flags, NoiseParams::lacunarity, noise3d_gradient(), NOISE_FLAG_ABSVALUE, NOISE_FLAG_EASED, NoiseParams::octaves, NoiseParams::offset, NoiseParams::persist, NoiseParams::scale, NoiseParams::seed, seed, and NoiseParams::spread.

Referenced by CavesRandomWalk::carveRoute(), OreScatter::generate(), DungeonGen::generate(), MapgenBasic::generateDungeons(), MapgenV7::getMountainTerrainAtPoint(), MapgenCarpathian::getSpawnLevelAtPoint(), MapgenV5::getSpawnLevelAtPoint(), MapgenValleys::getSpawnLevelAtPoint(), LuaPerlinNoise::l_get_3d(), MapgenV6::makeChunk(), NoisePerlin3D_PO(), and TestNoise::testNoise3dPoint().

Here is the call graph for this function:

Here is the caller graph for this function:

triLinearInterpolation()

float triLinearInterpolation	(	float	v000,
		float	v100,
		float	v010,
		float	v110,
		float	v001,
		float	v101,
		float	v011,
		float	v111,
		float	x,
		float	y,
		float	z
	)

References biLinearInterpolationNoEase(), easeCurve(), and linearInterpolation().

Referenced by Noise::gradientMap3D(), and noise3d_gradient().

Here is the call graph for this function:

Here is the caller graph for this function:

triLinearInterpolationNoEase()

float triLinearInterpolationNoEase	(	float	v000,
		float	v100,
		float	v010,
		float	v110,
		float	v001,
		float	v101,
		float	v011,
		float	v111,
		float	x,
		float	y,
		float	z
	)

References biLinearInterpolationNoEase(), and linearInterpolation().

Referenced by Noise::gradientMap3D(), and noise3d_gradient().

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

flagdesc_noiseparams

FlagDesc flagdesc_noiseparams[]

Initial value:

= {
    {"defaults",    NOISE_FLAG_DEFAULTS},
    {"eased",       NOISE_FLAG_EASED},
    {"absvalue",    NOISE_FLAG_ABSVALUE},
    {"pointbuffer", NOISE_FLAG_POINTBUFFER},
    {"simplex",     NOISE_FLAG_SIMPLEX},
    {NULL,          0}
}

Referenced by Settings::getNoiseParamsFromGroup(), push_noiseparams(), read_noiseparams(), and Settings::setNoiseParams().