Struct ExponentialInertia 

pub struct ExponentialInertia {
    pub position_x: f32,
    pub position_y: f32,
    pub velocity_x: f32,
    pub velocity_y: f32,
    /* private fields */
}

Exponentially decaying inertial motion with exact time integration.

Fields

position_x: f32

Current offset in pixels.

position_y: f32

Current offset in pixels.

velocity_x: f32

Current velocity in pixels per second.

velocity_y: f32

Current velocity in pixels per second.

Implementations

impl ExponentialInertia

pub fn new( position_x: f32, position_y: f32, velocity: ScrollVelocity, decay_rate: f32, ) -> Self

Creates inertial motion with a positive decay rate in inverse seconds.

pub fn advance(&mut self, dt: Duration) -> ScrollVelocity

Advances motion by dt, returning the integrated displacement.

pub fn velocity(&self) -> ScrollVelocity

Returns the current velocity.

Trait Implementations

impl Clone for ExponentialInertia

fn clone(&self) -> ExponentialInertia

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ExponentialInertia

impl Debug for ExponentialInertia

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

Formats the value using the given formatter.

impl PartialEq for ExponentialInertia

fn eq(&self, other: &ExponentialInertia) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ExponentialInertia