lerpFromBox static method

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

Implementation

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

  DecorationImage? aImageAtT;

  if (a.image != null) {
    DecorationImage aImage = a.image!;
    aImageAtT = DecorationImage(
      image: aImage.image,
      onError: aImage.onError,
      colorFilter: aImage.colorFilter,
      fit: aImage.fit,
      alignment: aImage.alignment,
      centerSlice: aImage.centerSlice,
      repeat: aImage.repeat,
      matchTextDirection: aImage.matchTextDirection,
      scale: aImage.scale,
      opacity: lerpDouble(aImage.opacity, 0, t) ?? 0,
      filterQuality: aImage.filterQuality,
      invertColors: aImage.invertColors,
      isAntiAlias: aImage.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: aImageAtT,
    shape: t < 0.5 ? a.shape : b.shape,
  );
}