Function splitNumber

src/component/visualMap/PiecewiseModel.ts:443–492

(outPieceList)

const resetMethods: Dictionary<ResetMethod> & ThisType<PiecewiseModel> = {

    splitNumber(outPieceList) {
        const thisOption = this.option;
        let precision = Math.min(thisOption.precision, 20);
        const dataExtent = this.getExtent();
        let splitNumber = thisOption.splitNumber;
        splitNumber = Math.max(parseInt(splitNumber as unknown as string, 10), 1);
        thisOption.splitNumber = splitNumber;

        let splitStep = (dataExtent[1] - dataExtent[0]) / splitNumber;
        // Precision auto-adaption
        while (+splitStep.toFixed(precision) !== splitStep && precision < 5) {
            precision++;
        }
        thisOption.precision = precision;
        splitStep = +splitStep.toFixed(precision);

        if (thisOption.minOpen) {
            outPieceList.push({
                interval: [-Infinity, dataExtent[0]],
                close: [0, 0]
            });
        }

        for (
            let index = 0, curr = dataExtent[0];
            index < splitNumber;
            curr += splitStep, index++
        ) {
            const max = index === splitNumber - 1 ? dataExtent[1] : (curr + splitStep);

            outPieceList.push({
                interval: [curr, max],
                close: [1, 1]
            });
        }

        if (thisOption.maxOpen) {
            outPieceList.push({
                interval: [dataExtent[1], Infinity],
                close: [0, 0]
            });
        }

        reformIntervals(outPieceList as Required<InnerVisualPiece>[]);

        zrUtil.each(outPieceList, function (piece, index) {
            piece.index = index;
            piece.text = this.formatValueText(piece.interval);
        }, this);
    },

    categories(outPieceList) {
        const thisOption = this.option;