修改线绘制 流动箭头，保存，然后再次编辑，未显示对应参数以及虚线远视角报错问题

src/Tools/index.js

@@ -638,7 +638,7 @@ class Tools {
       // break
       case 6: //流动虚线2
         let that = this
-
+        let repeatX
         material = new Cesium.FlowDashedLineFlowMaterialProperty({
           color: color,
           uType: type == 5 ? 0 : 1,
@@ -660,11 +660,10 @@ class Tools {
             let point2 = new Cesium.Cartesian2(that.sdk.viewer.canvas.clientWidth / 2, that.sdk.viewer.canvas.clientHeight)
             var cartesian1 = that.sdk.viewer.scene.pickPosition(point1)
             var cartesian2 = that.sdk.viewer.scene.pickPosition(point2)
-
-            var distance2 = Cesium.Cartesian3.distance(cartesian1, cartesian2);
-
-            let repeatX = distance2 * 2 / distance
-
+            if (cartesian1 && cartesian2) {
+              var distance2 = Cesium.Cartesian3.distance(cartesian1, cartesian2);
+              repeatX = distance2 * 2 / distance
+            }
             return repeatX;
           })
         })