[3d] fix preview camera not sync up issue (#2747)

src/extensions/core/load3d/Load3d.ts

@@ -215,6 +215,10 @@ class Load3d {
 
   setCameraState(state: CameraState): void {
     this.cameraManager.setCameraState(state)
+
+    if (this.previewManager.showPreview) {
+      this.previewManager.syncWithMainCamera()
+    }
   }
 
   getCameraState(): CameraState {
@@ -269,10 +273,6 @@ class Load3d {
     this.previewManager.togglePreview(showPreview)
   }
 
-  refreshCamera(): void {
-    this.cameraManager.refreshCamera()
-  }
-
   setTargetSize(width: number, height: number): void {
     this.previewManager.setTargetSize(width, height)
   }