lerp method

@override BoxSpec lerp(double t)

Returns the interpolated BoxSpec at the given progress t.

The parameter t typically ranges from 0.0 to 1.0.

Implementation

@override
BoxSpec lerp(double t) {
  if (begin == null && end == null) return const BoxSpec();
  if (begin == null) return end!;

  return begin!.lerp(end!, t);
}