public class PointFEvaluator extends Object implements TypeEvaluator<PointF>
PointF
values.Constructor and Description |
---|
PointFEvaluator()
Construct a PointFEvaluator that returns a new PointF on every evaluate call.
|
PointFEvaluator(PointF reuse)
Constructs a PointFEvaluator that modifies and returns
reuse
in evaluate(float, android.graphics.PointF, android.graphics.PointF) calls. |
Modifier and Type | Method and Description |
---|---|
PointF |
evaluate(float fraction,
PointF startValue,
PointF endValue)
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. |
public PointFEvaluator()
PointFEvaluator(android.graphics.PointF)
should be used
whenever possible.public PointFEvaluator(PointF reuse)
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.reuse
- A PointF to be modified and returned by evaluate.public PointF evaluate(float fraction, PointF startValue, PointF endValue)
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.
evaluate
in interface TypeEvaluator<PointF>
fraction
- The fraction from the starting to the ending valuesstartValue
- The start PointFendValue
- The end PointFfraction
parameter.