Method _animateSymbol

src/chart/helper/EffectLine.ts:165–185

(
        symbol: ECSymbolOnEffectLine, period: number, delayNum: number, loop: boolean, roundTrip: boolean)

    }

    private _animateSymbol(
        symbol: ECSymbolOnEffectLine, period: number, delayNum: number, loop: boolean, roundTrip: boolean) {
        if (period > 0) {
            symbol.__t = 0;
            const self = this;
            const animator = symbol.animate('', loop)
                .when(roundTrip ? period * 2 : period, {
                    __t: roundTrip ? 2 : 1
                })
                .delay(delayNum)
                .during(function () {
                    self._updateSymbolPosition(symbol);
                });
            if (!loop) {
                animator.done(function () {
                    self.remove(symbol);
                });
            }
            animator.start();
        }
    }

    protected _getLineLength(symbol: ECSymbolOnEffectLine) {
        // Not so accurate