bug

common/Tnb.Common/Utils/Dijkstra.cs

@@ -50,10 +50,14 @@
                 node1.ivex = p2;
                 node1.weight = weight;
                 // 将node1链接到"p1所在链表的末尾"
-                if (mVexs[p1].firstEdge == null)
-                    mVexs[p1].firstEdge = node1;
-                else
-                    LinkLast(mVexs[p1].firstEdge, node1);
+                if (p1 != -1)
+                {
+                    if (p1 != -1 && mVexs[p1].firstEdge == null)
+                        mVexs[p1].firstEdge = node1;
+                    else
+                        LinkLast(mVexs[p1].firstEdge, node1);
+                }
+               
                 //// 初始化node2
                 //ENode node2 = new ENode();
                 //node2.ivex = p1;