Method incrementalUpdate

src/chart/helper/LargeLineDraw.ts:254–288

(
        taskParams: StageHandlerProgressParams,
        data: LargeLinesData,
        incrementalId: Displayable['incremental']
    )

    };

    incrementalUpdate(
        taskParams: StageHandlerProgressParams,
        data: LargeLinesData,
        incrementalId: Displayable['incremental']
    ) {
        const lastAdded = this._newAdded[0];
        const linePoints = data.getLayout('linesPoints');

        const oldSegs = lastAdded && lastAdded.shape.segs;

        // Merging the exists. Each element has 1e4 points.
        // Consider the performance balance between too much elements and too much points in one shape(may affect hover optimization)
        if (oldSegs && oldSegs.length < 2e4) {
            const oldLen = oldSegs.length;
            const newSegs = new Float32Array(oldLen + linePoints.length);
            // Concat two array
            newSegs.set(oldSegs);
            newSegs.set(linePoints, oldLen);
            lastAdded.setShape({
                segs: newSegs
            });
        }
        else {
            // Clear
            this._newAdded = [];

            const lineEl = this._create();
            lineEl.incremental = incrementalId;
            lineEl.setShape({
                segs: linePoints
            });
            this._setCommon(lineEl, data);
            lineEl.__startIndex = taskParams.start;
        }
    }

    /**
     * @override