transformInternal method Null safety

  1. @override
double transformInternal(
  1. double t
)
override

Returns the value of the curve at point t.

The given parametric value t will be between 0.0 and 1.0, inclusive.

Implementation

@override
double transformInternal(double t) {
  final bool firstCurve = t < midpoint.dx;
  final double scaleX = firstCurve ? midpoint.dx : 1.0 - midpoint.dx;
  final double scaleY = firstCurve ? midpoint.dy : 1.0 - midpoint.dy;
  final double scaledT = (t - (firstCurve ? 0.0 : midpoint.dx)) / scaleX;
  if (firstCurve) {
    return Cubic(
      a1.dx / scaleX,
      a1.dy / scaleY,
      b1.dx / scaleX,
      b1.dy / scaleY,
    ).transform(scaledT) * scaleY;
  } else {
    return Cubic(
      (a2.dx - midpoint.dx) / scaleX,
      (a2.dy - midpoint.dy) / scaleY,
      (b2.dx - midpoint.dx) / scaleX,
      (b2.dy - midpoint.dy) / scaleY,
    ).transform(scaledT) * scaleY + midpoint.dy;
  }
}