introduce get_camera method to get current camera parameters

nicegui/elements/scene.js

@@ -425,6 +425,23 @@ export default {
         })
         .start();
     },
+    get_camera() {
+      return {
+        position: this.camera.position,
+        up: this.camera.up,
+        rotation: this.camera.rotation,
+        quaternion: this.camera.quaternion,
+        type: this.camera.type,
+        fov: this.camera.fov,
+        aspect: this.camera.aspect,
+        near: this.camera.near,
+        far: this.camera.far,
+        left: this.camera.left,
+        right: this.camera.right,
+        top: this.camera.top,
+        bottom: this.camera.bottom,
+      };
+    },
     resize() {
       const { clientWidth, clientHeight } = this.$el;
       this.renderer.setSize(clientWidth, clientHeight);

nicegui/elements/scene.py

@@ -263,6 +263,14 @@ def move_camera(self,
                         self.camera.look_at_x, self.camera.look_at_y, self.camera.look_at_z,
                         self.camera.up_x, self.camera.up_y, self.camera.up_z, duration)
 
+    async def get_camera(self) -> Dict[str, Any]:
+        """Get the current camera parameters.
+
+        In contrast to the `camera` property,
+        the result of this method includes the current camera pose caused by the user navigating the scene in the browser.
+        """
+        return await self.run_method('get_camera')
+
     def _handle_delete(self) -> None:
         binding.remove(list(self.objects.values()))
         super()._handle_delete()