是

src/viewer/NavigationCube.js

@@ -816,9 +816,9 @@ class NavCubeViewer extends ViewerBase{
             viewer.focusOnObject(viewer.bound, 'boundingBox', 1000, {
                 endPitch: pitch, endYaw: yaw , dir,  startCamera, endCamera
             }).promise.done(()=>{  
-                let baseLine = viewer.scene.measurements.find(e=>e.isBaseLine && e.points.length == 2)   
+                /* let baseLine = viewer.scene.measurements.find(e=>e.isBaseLine && e.points.length == 2)   
                 baseLine && Potree.Utils.updateVisible(baseLine,'enterOrthoView',true)//基准线仅在正交视图可见
-                 
+                  */
                 done && done()
                 navCubeViewer.dispatchEvent('content_changed')
             })
@@ -896,9 +896,9 @@ class NavCubeViewer extends ViewerBase{
                 startCamera = viewer.scene.cameraO
                 endCamera = viewer.scene.cameraP 
                 
-                let baseLine = viewer.scene.measurements.find(e=>e.isBaseLine && e.points.length == 2)   
+                /* let baseLine = viewer.scene.measurements.find(e=>e.isBaseLine && e.points.length == 2)   
                 baseLine && Potree.Utils.updateVisible(baseLine,'enterOrthoView',false) //基准线仅在正交视图可见
-                
+                 */
             }else{
                 
                 console.log('switchView2', 'not ortho')