Struct nannou::noise::Billow

pub struct Billow {
    pub octaves: usize,
    pub frequency: f64,
    pub lacunarity: f64,
    pub persistence: f64,
    /* private fields */
}

Noise function that outputs “billowy” noise.

This noise function produces “billowy” noise suitable for clouds and rocks.

This noise function is nearly identical to fBm noise, except this noise function modifies each octave with an absolute-value function. See the documentation for fBm for more information.

Fields

octaves: usize

Total number of frequency octaves to generate the noise with.

The number of octaves control the amount of detail in the noise function. Adding more octaves increases the detail, with the drawback of increasing the calculation time.

frequency: f64

The number of cycles per unit length that the noise function outputs.

lacunarity: f64

A multiplier that determines how quickly the frequency increases for each successive octave in the noise function.

The frequency of each successive octave is equal to the product of the previous octave’s frequency and the lacunarity value.

A lacunarity of 2.0 results in the frequency doubling every octave. For almost all cases, 2.0 is a good value to use.

persistence: f64

A multiplier that determines how quickly the amplitudes diminish for each successive octave in the noise function.

The amplitude of each successive octave is equal to the product of the previous octave’s amplitude and the persistence value. Increasing the persistence produces “rougher” noise.

Implementations

impl Billow

pub const DEFAULT_SEED: u32 = 0u32

pub const DEFAULT_OCTAVE_COUNT: usize = 6usize

pub const DEFAULT_FREQUENCY: f64 = 1f64

pub const DEFAULT_LACUNARITY: f64 = 2.0943951023931953f64

pub const DEFAULT_PERSISTENCE: f64 = 0.5f64

pub const MAX_OCTAVES: usize = 32usize

pub fn new() -> Billow

Trait Implementations

impl Clone for Billow

fn clone(&self) -> Billow

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Billow

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Billow

fn default() -> Billow

Returns the “default value” for a type.

impl MultiFractal for Billow

fn set_octaves(self, octaves: usize) -> Billow

fn set_frequency(self, frequency: f64) -> Billow

fn set_lacunarity(self, lacunarity: f64) -> Billow

fn set_persistence(self, persistence: f64) -> Billow

impl NoiseFn<[f64; 2]> for Billow

2-dimensional Billow noise

fn get(&self, point: [f64; 2]) -> f64

impl NoiseFn<[f64; 3]> for Billow

3-dimensional Billow noise

fn get(&self, point: [f64; 3]) -> f64

impl NoiseFn<[f64; 4]> for Billow

4-dimensional Billow noise

fn get(&self, point: [f64; 4]) -> f64

impl Seedable for Billow

fn set_seed(self, seed: u32) -> Billow

Set the seed for the function implementing the Seedable trait

fn seed(&self) -> u32

Getter to retrieve the seed from the function