Struct noise::BasicMulti

pub struct BasicMulti {
    pub octaves: usize,
    pub frequency: f64,
    pub lacunarity: f64,
    pub persistence: f64,
    // some fields omitted
}

Noise function that outputs heterogenous Multifractal noise.

This is a multifractal method, meaning that it has a fractal dimension that varies with location.

The result of this multifractal method is that in areas near zero, higher frequencies will be heavily damped, resulting in the terrain remaining smooth. As the value moves further away from zero, higher frequencies will not be as damped and thus will grow more jagged as iteration progresses.

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.

Methods

impl BasicMulti

pub const DEFAULT_SEED: u32

DEFAULT_SEED: u32 = 0

pub const DEFAULT_OCTAVES: usize

DEFAULT_OCTAVES: usize = 6

pub const DEFAULT_FREQUENCY: f64

DEFAULT_FREQUENCY: f64 = 2.0

pub const DEFAULT_LACUNARITY: f64

DEFAULT_LACUNARITY: f64 = std::f64::consts::PI * 2.0 / 3.0

pub const DEFAULT_PERSISTENCE: f64

DEFAULT_PERSISTENCE: f64 = 0.5

pub const MAX_OCTAVES: usize

MAX_OCTAVES: usize = 32

pub fn new() -> Self

Trait Implementations

impl Clone for BasicMulti

fn clone(&self) -> BasicMulti

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BasicMulti

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for BasicMulti

fn default() -> Self

Returns the "default value" for a type.

impl MultiFractal for BasicMulti

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

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

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

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

impl Seedable for BasicMulti

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

Set the seed for the function implementing the Seedable trait

fn seed(&self) -> u32

Getter to retrieve the seed from the function

impl NoiseFn<Point2<f64>> for BasicMulti

2-dimensional BasicMulti noise

fn get(&self, point: Point2<f64>) -> f64

impl NoiseFn<Point3<f64>> for BasicMulti

3-dimensional BasicMulti noise

fn get(&self, point: Point3<f64>) -> f64

impl NoiseFn<Point4<f64>> for BasicMulti

4-dimensional BasicMulti noise

fn get(&self, point: Point4<f64>) -> f64