Check camera timestamp (#431)

check camera timestamp

nerfactory/viewer/app/package.json

@@ -1,7 +1,7 @@
 {
   "name": "viewer",
   "homepage": ".",
-  "version": "22-09-13-0",
+  "version": "22-09-14-0",
   "private": true,
   "dependencies": {
     "@emotion/react": "^11.10.4",

nerfactory/viewer/app/src/modules/ViewerWindow/ViewerWindow.jsx

@@ -152,10 +152,12 @@ export default function ViewerWindow(props) {
     if (websocket.readyState === WebSocket.OPEN) {
       const cmd = 'write';
       const path = 'renderingState/camera';
+      const data_packet = sceneTree.metadata.camera.toJSON();
+      data_packet.object.timestamp = +new Date();
       const data = {
         type: cmd,
         path,
-        data: sceneTree.metadata.camera.toJSON(),
+        data: data_packet,
       };
       const message = msgpack.encode(data);
       websocket.send(message);

nerfactory/viewer/server/viewer_utils.py

@@ -235,6 +235,7 @@ class VisualizerState:
         self.static_fps = 1
         self.moving_fps = 24
         self.camera_moving = False
+        self.prev_camera_timestamp = 0
 
         self.outputs_set = False
 
@@ -525,6 +526,12 @@ class VisualizerState:
         Args:
             graph: current checkpoint of model
         """
+        # Check that timestamp is newer than the last one
+        if int(camera_object["timestamp"]) < self.prev_camera_timestamp:
+            return
+
+        self.prev_camera_timestamp = int(camera_object["timestamp"])
+
         # check and perform output type updates
         output_type = self.vis["renderingState/output_choice"].read()
         output_type = OutputTypes.INIT if output_type is None else output_type