fix path split

src/graphics/pathJoin.js

@@ -15,6 +15,7 @@ define(
         var Clipper = require('./join/Clipper');
         var Relation = require('./join/relation');
         var pathUtil = require('./pathUtil');
+        var reducePath = require('./reducePath');
         var interpolate = pathUtil.interpolate;
         var deInterpolate = pathUtil.deInterpolate;
 
@@ -82,6 +83,8 @@ define(
             paths = segment2Bezier(paths, bezierHash);
 
             return paths.map(function (path) {
+                // 有些情况下分割节点处会出现线段重叠的情况，这里需要去除重叠线段
+                path = reducePath(path);
                 return deInterpolate(path);
             });
         }

src/graphics/pathSplitBySegment.js

@@ -34,7 +34,7 @@ define(
             var l = paths.length;
             var leftSide = [];
             var rightSide = [];
-
+            var leftPaths = [];
             for (; i < l; i++) {
                 var path = interpolate(paths[i]);
                 var result = getSegmentPathJoint(path, p0, p1);
@@ -59,11 +59,14 @@ define(
                         }
                     });
                 }
+                else {
+                    leftPaths.push(paths[i]);
+                }
             }
 
             // TODO 组合左右两侧的曲线段
             var result = pathJoin(leftSide, relation.join).concat(pathJoin(rightSide, relation.join));
-
+            result = leftPaths.concat(result);
             return result.map(function (path) {
                 return deInterpolate(path);
             });

src/graphics/pathUtil.js

@@ -136,12 +136,30 @@ define(
             return ret;
         }
 
+        /**
+         * 对path进行双向链表连接
+         * @param  {Array} path 轮廓数组
+         * @return {Array}         path
+         */
+        function makeLink(path) {
+            for (var i = 0, l = path.length; i < l; i++) {
+                var cur = path[i];
+                var prev = i === 0 ? path[l - 1] : path[i - 1];
+                var next = i === l - 1 ? path[0] : path[i + 1];
+                cur.next = next;
+                cur.prev = prev;
+            }
+
+            return path;
+        }
+
         return {
             interpolate: interpolate,
             deInterpolate: deInterpolate,
             isClockWise: isClockWise,
             removeOverlapPoints: removeOverlapPoints,
-            getPathHash: getPathHash
+            getPathHash: getPathHash,
+            makeLink: makeLink
         };
     }
 );