evaluate method

@override double evaluate(Animation<double> animation)

The current value of this object for the given Animation.

This function is implemented by deferring to transform. Subclasses that want to provide custom behavior should override transform, not evaluate.

See also:

• transform, which is similar but takes a t value directly instead of an Animation.
• animate, which creates an Animation out of this object, continually applying evaluate.

Implementation

@override
double evaluate(Animation<double> animation) =>
    lerp((math.sin((animation.value - delay) * 2 * math.pi) + 1) / 2);