FanPiece constructor
FanPiece({})
Fan Piece is the smallest unit on the color picker wheel, it looks like a piece of a donut Fan piece is used by FanPieceWidget to hold its data. FanPiece model is responsible to convert spherical coordinates to cartesian coordinates
Implementation
FanPiece({
required this.angleStart,
required this.swipe,
required this.radiusEnd,
required this.radiusStart,
required this.color,
required this.center,
});