Method start

src/common/overlay/levelRenderer/Animation.js:449–638

* @function LevelRenderer.Animation.Animator.prototype.start * @description 开始执行动画 * @param {(string|function)} easing - 动画缓动函数。详见： 。 * @returns {LevelRenderer.Animation.Animator} Animator

(easing)

     * @returns {LevelRenderer.Animation.Animator} Animator
     */
    start(easing) {
        var self = this;
        var setter = this._setter;
        var getter = this._getter;
        var onFrameListLen = self._onframeList.length;
        var useSpline = easing === 'spline';

        var ondestroy = function () {
            self._clipCount--;
            if (self._clipCount === 0) {
                // Clear all tracks
                self._tracks = {};

                var len = self._doneList.length;
                for (var i = 0; i < len; i++) {
                    self._doneList[i].call(self);
                }
            }
        };

        var createTrackClip = function (keyframes, propName) {
            var trackLen = keyframes.length;
            if (!trackLen) {
                return;
            }
            // Guess data type
            var firstVal = keyframes[0].value;
            var isValueArray = Animation._isArrayLike(firstVal);
            var isValueColor = false;

            // For vertices morphing
            var arrDim = (
                isValueArray
                && Animation._isArrayLike(firstVal[0])
            )
                ? 2 : 1;
            // Sort keyframe as ascending
            keyframes.sort(function (a, b) {
                return a.time - b.time;
            });
            var trackMaxTime = keyframes[trackLen - 1].time;
            // Percents of each keyframe
            var kfPercents = [];
            // Value of each keyframe
            var kfValues = [];
            for (let i = 0; i < trackLen; i++) {
                kfPercents.push(keyframes[i].time / trackMaxTime);
                // Assume value is a color when it is a string
                var value = keyframes[i].value;
                if (typeof(value) == 'string') {
                    value = SUtil.Util_color.toArray(value);
                    if (value.length === 0) {    // Invalid color
                        value[0] = value[1] = value[2] = 0;
                        value[3] = 1;
                    }
                    isValueColor = true;
                }
                kfValues.push(value);