Method setPercY

packages/fairygui/src/scroll/ScrollPane.ts:297–299

* Set vertical scroll percent with animation * 设置垂直滚动百分比（带动画）

(value: number, bAnimate: boolean)

     * 设置垂直滚动百分比（带动画）
     */
    public setPercY(value: number, bAnimate: boolean): void {
        this.setPosY(this._overlapHeight * clamp01(value), bAnimate);
    }

    /**
     * Set horizontal position with animation