cesium-unreal
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CesiumGS
Logic of tile loading failure
I’ve observed occasional failures during the loading of TileContent, specifically at CreateOffGameThread or CreateOnGameThread. However, there is no existing logic to handle these loading failures in the code connecting Cesium for Unreal and Cesium Native. This lack of error handling can lead to incorrect tile selections during tile filtering, as tiles that haven’t successfully loaded may still be incorrectly marked as TileLoadState::Done, resulting in visible gaps in the model.
Interestingly, this issue doesn’t seem to exist in CesiumJS, which handles loading exceptions quite effectively.
Relevant Code (from TilesetContentManager.cpp):
void* pWorkerRenderResources = pRenderContent->getRenderResources(); void* pMainThreadRenderResources = this->_externals.pPrepareRendererResources->prepareInMainThread(tile,pWorkerRenderResources); pRenderContent->setRenderResources(pMainThreadRenderResources); tile.setState(TileLoadState::Done);
Is there any potential solution to address this issue?
What sort of tile failures are you seeing? My understanding is that the code you quoted above should only be called after the tile is in the ContentLoaded state, meaning the the content has already loaded successfully.
I have recorded some videos for us to continue discussing this issue
The phenomenon of loading errors is as follows： https://github.com/user-attachments/assets/e06fb9f3-fe3c-4c7a-8fab-322e5e6b58ff
The code for cesium native only marked warnings：
https://github.com/user-attachments/assets/8bf9563a-5e8b-444c-aaf2-24b46dc9906b
The code for cesium unreal did not address the issue of loading failure, which in my example was due to an error in the buffer view in the allocator：
https://github.com/user-attachments/assets/1c1f5243-3e9c-407d-95d6-8aac87054a0b
Hi @Yeah-Zi , sorry for the inactivity on this. Is this still an issue for you on the latest version of Cesium for Unreal?
