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minosworld / minos

MINOS: Multimodal Indoor Simulator
MIT License
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map "roomId" back to node in the SUNCG json files #36

Closed yscoffee closed 6 years ago

yscoffee commented 6 years ago

is it possible to map "roomId" or the roomIndex in the .arch.json back to the node in the .json file (SUNCG) ? Looks "roomId" is not assigned based on the ID (e.g. '1_1') specified in the SUNCG annotation. Thanks

msavva commented 6 years ago

Yes, the roomId value is a linearized contiguous index of the room node ids sorted in ascending order of the first id part x then the second id part y in x_y. The zeroth value corresponds to null, and room nodes are numbered with index 1 and larger. The logic that constructs this index is in https://github.com/smartscenes/sstk/blob/master/client/js/lib/scene/SceneState.js#L1398 . If you want to map from the index value back to the room node you can construct the same room id array and index into it.

yushiangw commented 6 years ago

Thanks for your detailed explanation. just to confirm, it looks the actual room index value will depend on the run-time status of the lib/ds/Index object, right?

msavva commented 6 years ago

Yes, that's correct. Note however that the linearized index is stable for a given house since the contiguous sorted order of room node ids does not change.