Struct gdnative::api::RandomNumberGenerator

pub struct RandomNumberGenerator { /* fields omitted */ }

core class RandomNumberGenerator inherits Reference (reference counted).

Official documentation

See the documentation of this class in the Godot engine's official documentation.

Memory management

The lifetime of this object is automatically managed through reference counting.

Class hierarchy

RandomNumberGenerator inherits methods from:

• Reference
• Object

Safety

All types in the Godot API have "interior mutability" in Rust parlance. To enforce that the official thread-safety guidelines are followed, the typestate pattern is used in the Ref and TRef smart pointers, and the Instance API. The typestate Access in these types tracks whether the access is unique, shared, or exclusive to the current thread. For more information, see the type-level documentation on Ref.

Implementations

impl RandomNumberGenerator

pub fn new() -> Ref<RandomNumberGenerator, Unique>

Creates a new instance of this object.

This is a reference-counted type. The returned object is automatically managed by Ref.

pub fn seed(&self) -> i64

The seed used by the random number generator. A given seed will give a reproducible sequence of pseudo-random numbers.
			[b]Note:[/b] The RNG does not have an avalanche effect, and can output similar random streams given similar seeds. Consider using a hash function to improve your seed quality if they're sourced externally.

pub fn randf(&self) -> f64

Generates a pseudo-random float between [code]0.0[/code] and [code]1.0[/code] (inclusive).

pub fn randf_range(&self, from: f64, to: f64) -> f64

Generates a pseudo-random float between [code]from[/code] and [code]to[/code] (inclusive).

pub fn randfn(&self, mean: f64, deviation: f64) -> f64

Generates a [url=https://en.wikipedia.org/wiki/Normal_distribution]normally-distributed[/url] pseudo-random number, using Box-Muller transform with the specified [code]mean[/code] and a standard [code]deviation[/code]. This is also called Gaussian distribution.

Default Arguments

• mean - 0.0
• deviation - 1.0

pub fn randi(&self) -> i64

Generates a pseudo-random 32-bit unsigned integer between [code]0[/code] and [code]4294967295[/code] (inclusive).

pub fn randi_range(&self, from: i64, to: i64) -> i64

Generates a pseudo-random 32-bit signed integer between [code]from[/code] and [code]to[/code] (inclusive).

pub fn randomize(&self)

Setups a time-based seed to generator.

pub fn set_seed(&self, seed: i64)

The seed used by the random number generator. A given seed will give a reproducible sequence of pseudo-random numbers.
			[b]Note:[/b] The RNG does not have an avalanche effect, and can output similar random streams given similar seeds. Consider using a hash function to improve your seed quality if they're sourced externally.

Methods from Deref<Target = Reference>

pub fn init_ref(&self) -> bool

Initializes the internal reference counter. Use this only if you really know what you are doing.
				Returns whether the initialization was successful.

Trait Implementations

impl Debug for RandomNumberGenerator

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

Formats the value using the given formatter.

impl Deref for RandomNumberGenerator

type Target = Reference

The resulting type after dereferencing.

fn deref(&self) -> &Reference

Dereferences the value.

impl DerefMut for RandomNumberGenerator

fn deref_mut(&mut self) -> &mut Reference

Mutably dereferences the value.

impl GodotObject for RandomNumberGenerator

type RefKind = RefCounted

The memory management kind of this type. This modifies the behavior of the Ref smart pointer. See its type-level documentation for more information.

fn class_name() -> &'static str

fn null() -> Null<Self>

Creates an explicitly null reference of Self as a method argument. This makes type inference easier for the compiler compared to Option.

fn new() -> Ref<Self, Unique> where
    Self: Instanciable, 

Creates a new instance of Self using a zero-argument constructor, as a Unique reference.

fn cast<T>(&self) -> Option<&T> where
    T: GodotObject + SubClass<Self>, 

Performs a dynamic reference downcast to target type.

fn upcast<T>(&self) -> &T where
    Self: SubClass<T>,
    T: GodotObject, 

Performs a static reference upcast to a supertype that is guaranteed to be valid.

unsafe fn assume_shared(&self) -> Ref<Self, Shared>

Creates a persistent reference to the same Godot object with shared thread access.

unsafe fn assume_thread_local(&self) -> Ref<Self, ThreadLocal> where
    Self: GodotObject<RefKind = RefCounted>, 

Creates a persistent reference to the same Godot object with thread-local thread access.

unsafe fn assume_unique(&self) -> Ref<Self, Unique>

Creates a persistent reference to the same Godot object with unique access.

impl Instanciable for RandomNumberGenerator

fn construct() -> Ref<RandomNumberGenerator, Unique>

impl SubClass<Object> for RandomNumberGenerator

impl SubClass<Reference> for RandomNumberGenerator