VelocityEstimate class

A two dimensional velocity estimate.

VelocityEstimates are computed by VelocityTracker.getVelocityEstimate. An estimate's confidence measures how well the velocity tracker's position data fit a straight line, duration is the time that elapsed between the first and last position sample used to compute the velocity, and offset is similarly the difference between the first and last positions.

See also:

  • VelocityTracker, which computes VelocityEstimates.
  • Velocity, which encapsulates (just) a velocity vector and provides some useful velocity operations.

Constructors

VelocityEstimate({@required Offset pixelsPerSecond, @required double confidence, @required Duration duration, @required Offset offset })
Creates a dimensional velocity estimate. [...]
const

Properties

confidence → double
A value between 0.0 and 1.0 that indicates how well VelocityTracker was able to fit a straight line to its position data. [...]
final
duration → Duration
The time that elapsed between the first and last position sample used to compute pixelsPerSecond.
final
offset Offset
The difference between the first and last position sample used to compute pixelsPerSecond.
final
pixelsPerSecond Offset
The number of pixels per second of velocity in the x and y directions.
final
hashCode → int
The hash code for this object. [...]
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

toString() → String
Returns a string representation of this object.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited

Operators

operator ==(dynamic other) → bool
The equality operator. [...]
inherited