优化:在切换视图时,锁定查看选中物体

src/Add-on/ViewChange.ts

@@ -41,7 +41,6 @@ export class ViewChange implements Command
                 }
             });
 
-
             if (vres.Status === PromptStatus.OK)
             {
                 let vs = vres.SelectSet.SelectEntityList as ViewportEntity[];
@@ -53,20 +52,19 @@ export class ViewChange implements Command
 
         app.Viewer.CameraCtrl.LookAt(this.viewDir);
         this.UcsLookAt(this.viewDir);
-        app.Viewer.ZoomAll();
-        app.Editor.UpdateScreen();
+
+        if (app.Editor.SelectCtrl.SelectSet.SelectObjectCount)
+            app.Viewer.ZoomtoEntitys(app.Editor.SelectCtrl.SelectSet.SelectEntityList);
+        else
+            app.Viewer.ZoomAll();
     }
 
     UcsLookAt(viewDir: Vector3)
     {
         if (this.useWCS)
-        {
             app.Editor.UCSMatrix = new Matrix4();
-        }
         else
-        {
             app.Editor.SetUCSLookAt(viewDir);
-        }
     }
     private ChangeViewport(vs: ViewportEntity[])
     {

src/GraphicsSystem/CameraUpdate.ts

@@ -7,6 +7,9 @@ const ViewScopeSize = 4e6;
 const ViewScopeMin = new Vector3(-ViewScopeSize, -ViewScopeSize * 0.7, -ViewScopeSize);
 const ViewScopeMax = ViewScopeMin.clone().negate();
 
+const ViewBoxMin = new Vector3(1, 1, 1);
+const viewBoxMax = new Vector3(1e7, 1e7, 1e7);
+
 export enum CameraType
 {
     OrthographicCamera = 1,
@@ -165,8 +168,9 @@ export class CameraUpdate
         box3.getCenter(this._Target);
         //世界坐标系
         this._Target.applyMatrix4(this.Camera.matrix);
-        //size
+
         let size = box3.getSize(new Vector3());
+        size.clamp(ViewBoxMin, viewBoxMax);
         //宽高比
         let aspectRatio = size.x / size.y;