PatentManage/Scripts/src/util/ecAnimation.js

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/**
 * echarts图表动画基类
 *
 * @desc echarts基于Canvas，纯Javascript图表库，提供直观，生动，可交互，可个性化定制的数据统计图表。
 * @author Kener (@Kener-林峰, kener.linfeng@gmail.com)
 *
 */
define(function (require) {
    var zrUtil = require('zrender/tool/util');
    var curveTool = require('zrender/tool/curve');
    
    /**
     * 折线型动画
     * 
     * @param {ZRender} zr
     * @param {shape} oldShape
     * @param {shape} newShape
     * @param {number} duration
     * @param {tring} easing
     */
    function pointList(zr, oldShape, newShape, duration, easing) {
        var newPointList = newShape.style.pointList;
        var newPointListLen = newPointList.length;
        var oldPointList;

        if (!oldShape) {        // add
            oldPointList = [];
            if (newShape._orient != 'vertical') {
                var y = newPointList[0][1];
                for (var i = 0; i < newPointListLen; i++) {
                    oldPointList[i] = [newPointList[i][0], y];
                }
            }
            else {
                var x = newPointList[0][0];
                for (var i = 0; i < newPointListLen; i++) {
                    oldPointList[i] = [x, newPointList[i][1]];
                }
            }

            if (newShape.type == 'half-smooth-polygon') {
                oldPointList[newPointListLen - 1] = zrUtil.clone(newPointList[newPointListLen - 1]);
                oldPointList[newPointListLen - 2] = zrUtil.clone(newPointList[newPointListLen - 2]);
            }
            oldShape = {style : {pointList : oldPointList}};
        }
        
        oldPointList = oldShape.style.pointList;
        var oldPointListLen = oldPointList.length;
        if (oldPointListLen == newPointListLen) {
            newShape.style.pointList = oldPointList;
        }
        else if (oldPointListLen < newPointListLen) {
            // 原来短，新的长，补全
            newShape.style.pointList = oldPointList.concat(newPointList.slice(oldPointListLen));
        }
        else {
            // 原来长，新的短，截断
            newShape.style.pointList = oldPointList.slice(0, newPointListLen);
        }