lerpToBox static method

AuroraDecorationMix lerpToBox(AuroraDecoration a, BoxDecoration b, double t)

Implementation

static AuroraDecorationMix lerpToBox(
    AuroraDecoration a, BoxDecoration b, double t) {
  List<Gradient> gradients = [];
  List<double> blurs = [];
  if (b.gradient != null) {
    gradients.add(b.gradient!.scale(t));
    blurs.add(0.0);
  }
  gradients = [
    ...?a.gradients?.map((e) => e.scale(1 - t)).toList(),
    ...gradients
  ];
  blurs = [...?a.gradientBlurs, ...blurs];

  DecorationImage? bImageAtT;

  if (b.image != null) {
    DecorationImage bImage = b.image!;
    bImageAtT = DecorationImage(
      image: bImage.image,
      onError: bImage.onError,
      colorFilter: bImage.colorFilter,
      fit: bImage.fit,
      alignment: bImage.alignment,
      centerSlice: bImage.centerSlice,
      repeat: bImage.repeat,
      matchTextDirection: bImage.matchTextDirection,
      scale: bImage.scale,
      opacity: lerpDouble(0, bImage.opacity, t) ?? 0,
      filterQuality: bImage.filterQuality,
      invertColors: bImage.invertColors,
      isAntiAlias: bImage.isAntiAlias,
    );
  }

  return AuroraDecorationMix(
    color: Color.lerp(a.color, b.color, t),
    border: BoxBorder.lerp(a.border, b.border, t),
    borderRadius:
        BorderRadiusGeometry.lerp(a.borderRadius, b.borderRadius, t),
    boxShadow: BoxShadow.lerpList(a.boxShadow, b.boxShadow, t),
    gradients: gradients,
    gradientBlurs: blurs,
    image: bImageAtT,
    shape: t < 0.5 ? a.shape : b.shape,
  );
}