Actually Three.js has JSONLoader to load JSON models.
Is it possible to convert JSON 3D model to BSON and load it using Three.js? Because I need to load huge JSON model.
I dont have a suggestion for BSON but you can take a look at the source in three.js\utils\converters\msgpack and http://threejs.org/examples/#webgl_loader_msgpack and you can read more about the format here: http://msgpack.org/
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I have annotated my data using vott and the default format is json. I wanted to load my data to detectron2 model but it seems that the required format is coco.
Can anyone tell me how can I convert my data from json vott to coco format ??
My classmates and I have created a python package called PyLabel to help others with this kind of task and other labelling tasks. You can see an example in this notebook: https://github.com/pylabel-project/samples/blob/main/coco2voc.ipynb.
You might be able to use the package's importer tool to import your data and convert it to coco.
You can find the code for the package here: https://github.com/pylabel-project/.
I need to deserialize some JSON objects. I tried to use Tiny-json library, but it's too slow. I tried to use Newtonsoft.Json, but it fails in webplayer with this error:
MissingMethodException: Method not found: 'System.Collections.ObjectModel.KeyedCollection.
What JSON parser do you recommend?
You can try one of these open source solutions:
https://github.com/jacobdufault/fullserializer
https://github.com/mtschoen/JSONObject (https://www.assetstore.unity3d.com/en/#!/content/710) I am using this one most of the times, it's versbose but does its job well, not sure about performance however
Or go with paid ones:
https://www.assetstore.unity3d.com/en/#!/content/11347
Unity 5.3 added Native support of Json Serializer. It is faster than others.
JsonUtility.ToJson to convert a class to Json.
JsonUtility.FromJson to convert Json back to class.
For complete example and information regarding json arrays, see
Serialize and Deserialize Json and Json Array in Unity
I want to load an xml file and convert it into JSON in angularjs on the client side.
You have two options.
Return the data from the API in format you require to prevent conversions (recommended).
Convert the XML to JSON using javascript.
For approach #2 I'll recommend you this solution http://goessner.net/download/prj/jsonxml/
And please be sure to read the article 'Converting Between XML and JSON' (by Stefan Goessner) to overview details of the problems with conversions.
Hi is it possible to import any random json file into cassandra.
The json file is not exported from sstable2json. The json file is from a different website and needs to be imported into cassandra. Please could anyone advise whether this is possible
JSON support won't be introduced until Cassandra 3.0 (see CASSANDRA-7970) and in this case you still need to define a schema for your json data to map to. You do have some other options:
Use maps which sort of map to JSON. Maps can be indexed as of Cassandra 2.1 (CASSANDRA-4511) There is also a good Stack Exchange post about this.
You mention 'any random json file'. You could just have a string column that contains the raw JSON, but then you lose any query-ability of that data.
Come up with some kind of schema for your JSON data and map it to a CQL table and write some code that parses the JSON and writes it to the CQL table mapping to that data. This doesn't sound like an option for you since you want to be able to import any random JSON file.
If you are looking to only do json document storage, you might want to look at more document-oriented solutions instead of a column-oriented solution like cassandra.
I am attempting to write a STEP loader that converts STEP to the THREE JS JSON format.
However, I have not seen anything in the JSON format information about creating a scene graph - i.e. a hierarchical scene structure.
Is it possible to do so?
Thanks - Imtiaz
If you are writing a Loader, you don't need Three.js JSON format as an intermediate step. As the other loaders do, just create the THREE.Geometry, THREE.Mesh, THREE.Object3D etc objects directly as you go about parsing the STEP file. Object3D is the basic container which you can use to create hierarchies. In addition to being able to contain meshes, you can .add() any number of other Object3Ds into Object3D.
If you still want to have this JSON step, the three JSON model format itself does not have support for hierarchies. But there is also (rather new I believe) Three.js object JSON format, which can store hierarchies. See THREE.ObjectLoader , it is in src/loaders/ObjectLoader.js