PointFEvaluator
open class PointFEvaluator : TypeEvaluator<PointF!>
kotlin.Any | |
↳ | android.animation.PointFEvaluator |
This evaluator can be used to perform type interpolation between PointF
values.
Summary
Public constructors | |
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Construct a PointFEvaluator that returns a new PointF on every evaluate call. |
|
PointFEvaluator(reuse: PointF!) Constructs a PointFEvaluator that modifies and returns |
Public methods | |
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open PointF! |
This function returns the result of linearly interpolating the start and end PointF values, with |
Public constructors
PointFEvaluator
PointFEvaluator()
Construct a PointFEvaluator that returns a new PointF on every evaluate call. To avoid creating an object for each evaluate call, PointFEvaluator#PointFEvaluator(android.graphics.PointF)
should be used whenever possible.
PointFEvaluator
PointFEvaluator(reuse: PointF!)
Constructs a PointFEvaluator that modifies and returns reuse
in evaluate(float,android.graphics.PointF,android.graphics.PointF)
calls. The value returned from evaluate(float,android.graphics.PointF,android.graphics.PointF)
should not be cached because it will change over time as the object is reused on each call.
Parameters | |
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reuse |
PointF!: A PointF to be modified and returned by evaluate. |
Public methods
evaluate
open fun evaluate(
fraction: Float,
startValue: PointF!,
endValue: PointF!
): PointF!
This function returns the result of linearly interpolating the start and end PointF values, with fraction
representing the proportion between the start and end values. The calculation is a simple parametric calculation on each of the separate components in the PointF objects (x, y).
If PointFEvaluator(android.graphics.PointF)
was used to construct this PointFEvaluator, the object returned will be the reuse
passed into the constructor.
Parameters | |
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fraction |
Float: The fraction from the starting to the ending values |
startValue |
PointF!: The start PointF |
endValue |
PointF!: The end PointF |
Return | |
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PointF! |
A linear interpolation between the start and end values, given the fraction parameter. |