Method _updateAnimationPoints

src/chart/helper/EffectLine.ts:193–200

(symbol: ECSymbolOnEffectLine, points: number[][])

    }

    protected _updateAnimationPoints(symbol: ECSymbolOnEffectLine, points: number[][]) {
        symbol.__p1 = points[0];
        symbol.__p2 = points[1];
        symbol.__cp1 = points[2] || [
            (points[0][0] + points[1][0]) / 2,
            (points[0][1] + points[1][1]) / 2
        ];
    }

    updateData(lineData: SeriesData, idx: number, seriesScope: LineDrawSeriesScope) {
        (this.childAt(0) as Line).updateData(lineData, idx, seriesScope);