noise

Documentation

Index

• func CubicHermite(t float64) float64
• func Grad(hash int, x, y, z float64) float64
• func Noise1D(p float64, f, g sample.FloatToFloat) float64
• func Noise2D(p vector2.Float64, f sample.FloatToFloat, g sample.Vec2ToVec2) float64
• func Noise3D(p vector3.Float64, fade sample.FloatToFloat, grad sample.Vec3ToVec3) float64
• func Perlin1D(x float64) float64
• func Perlin2D(v vector2.Float64) float64
• func Perlin3D(pos vector3.Float64) float64
• func QuinticInterpolation(t float64) float64
• type DistanceField
  • func NewDistanceField(xCells, yCells int, size vector2.Float64) *DistanceField
  • func (df DistanceField) Sample(in vector2.Float64) float64
• type Stack2D
  • func PerlinStack(entries ...Stack2DEntry) Stack2D
  • func (s2d Stack2D) Value(v vector2.Float64) float64
• type Stack2DEntry
• type TilingNoise
  • func NewDefaultTilingNoise() *TilingNoise
  • func NewTilingNoise(size int, frequncy float64, octaves int) *TilingNoise
  • func (tn *TilingNoise) Noise(x, y int) float64
  • func (tn *TilingNoise) NoiseAtPermutation(v vector2.Float64, per int) float64

Functions

func CubicHermite

func CubicHermite(t float64) float64

Cubic Hermite Curve

func Grad

func Grad(hash int, x, y, z float64) float64

func Noise1D

func Noise1D(p float64, f, g sample.FloatToFloat) float64

https://gpfault.net/posts/perlin-noise.txt.html

(1 - F(p-p0))g(p0)(p-p0) + F(p-p0)g(p1)(p-p1)

func Noise2D

func Noise2D(p vector2.Float64, f sample.FloatToFloat, g sample.Vec2ToVec2) float64

func Noise3D

func Noise3D(p vector3.Float64, fade sample.FloatToFloat, grad sample.Vec3ToVec3) float64

func Perlin1D

func Perlin1D(x float64) float64

func Perlin2D

func Perlin2D(v vector2.Float64) float64

func Perlin3D

func Perlin3D(pos vector3.Float64) float64

func QuinticInterpolation

func QuinticInterpolation(t float64) float64

Quintic interpolation curve

Types

type DistanceField

type DistanceField struct {
	// contains filtered or unexported fields
}

func NewDistanceField

func NewDistanceField(xCells, yCells int, size vector2.Float64) *DistanceField

func (DistanceField) Sample

func (df DistanceField) Sample(in vector2.Float64) float64

type Stack2D

type Stack2D struct {
	// contains filtered or unexported fields
}

func PerlinStack

func PerlinStack(entries ...Stack2DEntry) Stack2D

func (Stack2D) Value

func (s2d Stack2D) Value(v vector2.Float64) float64

type Stack2DEntry

type Stack2DEntry struct {
	Scalar    float64
	Amplitude float64
}

type TilingNoise

type TilingNoise struct {
	// contains filtered or unexported fields
}

Tiling noise implementation comes from this answer: https://gamedev.stackexchange.com/questions/23625/how-do-you-generate-tileable-perlin-noise

And simply takes advantage of perlin noise repeatability

func NewDefaultTilingNoise

func NewDefaultTilingNoise() *TilingNoise

func NewTilingNoise

func NewTilingNoise(size int, frequncy float64, octaves int) *TilingNoise

func (*TilingNoise) Noise

func (tn *TilingNoise) Noise(x, y int) float64

func (*TilingNoise) NoiseAtPermutation

func (tn *TilingNoise) NoiseAtPermutation(v vector2.Float64, per int) float64