Sine curve class

sine_curve.dart

class SineCurve extends Curve {
  final double count;

  SineCurve({this.count = 3});

  // t = x
  @override
  double transformInternal(double t) {
    var val = sin(count * 2 * pi * t) * 0.5 + 0.5;
    return val; //f(x)
  }
}