abstract_lerp

Lerping for abstract_dart Fields.

/// A double lerp.
final Lerp<double> _double = DoubleLerp(10.0, 20.0);

/// A num lerp.
final Lerp<num> _num = NumLerp(10.0, 20.0);

/// A decimal lerp.
final Lerp<Decimal> _decimal =
    DecimalLerp(Decimal.fromInt(10), Decimal.fromInt(20));

/// A custom lerp.
///
/// Multiplication, division, addition and subtraction are needed for a lerp.
/// A Field provides all of that.
final FieldLerp<double> _customLerp = FieldLerp(
  /// from
  10.0,

  /// to
  20.0,
  Field_.create(
    /// addition
    Group_.create(() => 0.0, (a, b) => a + b, (a, b) => a - b),

    /// multiplication
    Group_.create(() => 1.0, (a, b) => a * b, (a, b) => a / b),
  ),
);

print(_double.lerp(0.7)); // 17.0;
print(_double.reLerp(17.0)); // 0.7;
print(_num.lerp(0.7)); // 17.0;
print(_num.reLerp(17.0)); // 0.7;
print(_decimal.lerp(Decimal.parse("0.7"))); // 17.0;
print(_decimal.reLerp(Decimal.parse("17"))); // 0.7;
print(_customLerp.lerp(0.7)); // 17.0;
print(_customLerp.reLerp(17.0)); // 0.7;

final fromZero = _customLerp.copyWith(from: 0.0);

print(fromZero.lerp(0.7)); // 14.0;
print(_customLerp.reLerp(14.0)); // 0.7;