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"

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

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, bool eased)
float	triLinearInterpolation (float v000, float v100, float v010, float v110, float v001, float v101, float v011, float v111, float x, float y, float z, bool eased)
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	contour (float v)
float	NoisePerlin2D (const NoiseParams *np, float x, float y, s32 seed)
float	NoisePerlin3D (const 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))

Referenced by absidx(), call_string_dump(), ModApiEnvBase::collectNodeIds(), find_packer(), ModApiEnvBase::findNodesInArea(), GUIEditBoxWithScrollBar::getCursorPos(), Noise::gradientMap2D(), Noise::gradientMap3D(), LBMManager::loadIntroductionTimes(), ReflowScan::lookupBlock(), pack_inner(), LuaItemStack::packIn(), LuaPerlinNoise::packIn(), LuaPerlinNoiseMap::packIn(), LuaVoxelManip::packIn(), ScriptApiEnv::read_nodenames(), read_pv(), read_tree_def(), record_object(), script_pack(), GUIScene::setTexture(), suitable_key(), and ServerMap::updateVManip().

idx [2/2]

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

NOISE_MAGIC_SEED

#define NOISE_MAGIC_SEED   1013U

Referenced by noise2d(), and noise3d().

NOISE_MAGIC_X

#define NOISE_MAGIC_X   1619

Referenced by noise2d(), and noise3d().

NOISE_MAGIC_Y

#define NOISE_MAGIC_Y   31337

Referenced by noise2d(), and noise3d().

NOISE_MAGIC_Z

#define NOISE_MAGIC_Z   52591

Referenced by noise3d().

Function Documentation

biLinearInterpolation()

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

inline

References easeCurve(), and linearInterpolation().

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

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contour()

float contour

(

float

v

)

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

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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(), and triLinearInterpolation().

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noise2d()

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

References NOISE_MAGIC_SEED, NOISE_MAGIC_X, and NOISE_MAGIC_Y.

Referenced by MapgenV6::getBiome(), Noise::gradientMap2D(), noise2d_gradient(), TestNoise::testNoise2dAtOriginWithZeroSeed(), TestNoise::testNoise2dWithFunPrimes(), TestNoise::testNoise2dWithMaxSeed(), TestNoise::testNoise3dAtOriginWithZeroSeed(), and TestNoise::testNoise3dWithFunPrimes().

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noise2d_gradient()

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

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

Referenced by noise2d_perlin(), and NoisePerlin2D().

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noise2d_perlin()

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

References noise2d_gradient().

Referenced by Clouds::gridFilled().

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noise3d()

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

References NOISE_MAGIC_SEED, NOISE_MAGIC_X, NOISE_MAGIC_Y, and NOISE_MAGIC_Z.

Referenced by MapBlockMesh::MapBlockMesh(), Noise::gradientMap3D(), noise3d_gradient(), and TestNoise::testNoise3dWithMaxSeed().

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noise3d_gradient()

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

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

Referenced by NoisePerlin3D().

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NoisePerlin2D()

float NoisePerlin2D	(	const 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, and NoiseParams::spread.

Referenced by MapgenV7::baseTerrainLevelAtPoint(), BiomeGenOriginal::calcHeatAtPoint(), BiomeGenOriginal::calcHumidityAtPoint(), MapgenV6::generateCaves(), MapgenV6::getHaveAppleTree(), 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().

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NoisePerlin3D()

float NoisePerlin3D	(	const 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, and NoiseParams::spread.

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

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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, bool eased )

inline

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

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

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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().