On-the-fly glTF creation about importer-exporter HOT 5 CLOSED

The KML/COLLADA/glTF Exporter privides a filter option that allows you to export a single CityGML object according to its GMLID (Please refer to the pages 135-136 of the 3DCityDB-Documentation-3.3). Once the glTF object has been exported, you can simply copy it and replace the old one in your previously created glTF datasets.

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@yaozhihang Thanks for a reply. So how do I handle the case when I don't need a glTF file itself, but rather want to generate glTF output directly from the database to other software (i.e. web server) without the additional step of creating and storing files?

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Sorry, I've no idea how to handle this case using the 3DCityDB. Since the current version of the KML/COLLADA/glTF Exporter uses the collada2glTF tool to create glTF models, only glTF files can be created.

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The importer/exporter tool export can be run from the command line. You can issue a KML/COLLADA/glTF export using the -kmlExport flag. Filter criteria can be provided as separate configuration file through the -config parameter. Read more about the command line interface (CLI) in chapter 5.8 of the version 3.3 documentation.

Using the CLI, all you have to do is implement a service interface that would accept a client's request, create a corresponding configuration file, invoke a KML/COLLADA/glTF export and return the glTF output to the client. The overhead of using temporary file remains, but is hidden from the client.

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Closing this issue. Feel free to re-open if you have further questions.

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