Autodesk Model Derivative Service

The package Adsk.Platform.ModelDerivative provides a set of APIs to interact with the Autodesk Model Derivative Service.

Documentation

• API Reference: Strongly typed API
• Helpers: Set of helper methods

Installation

dotnet add package Adsk.Platform.ModelDerivative

Usage

See the QuickStart Guide for a general understanding.

The root object is ModelDerivativeClient. This object provides access to the Model Derivative APIs and the Helpers method.

Querying specific model properties

The Fetch Specific Properties endpoint needs a query to filter the properties to be returned. The query is a JSON object that can be created using the UntypedObject.

Here is an example of how to query the project attributes of an IFC model, using a helper method GetSpecificPropertiesAsync. Compared to the default endpoint, this method waits until the server completes the processing

using Autodesk.ModelDerivative;
using Autodesk.ModelDerivative.Helpers.Models;

public async Task<ParsedSpecificProperties> GetIFCprojectAttributes()
{

    async Task<string> getAccessToken()
    {
        //return access token with your logic
    }

    var MDclient = new ModelDerivativeClient(Location.US, getAccessToken);

    var fileURN = ""; // Replace with your file version urn, like 'urn:adsk.wipprod:fs.file:vf.w9MS3MDBQaat6ObHffTA?version=1'
    var modelGuid = ""; // Replace with your model guid like 'c0337487-5b66-422b-a284-c273b424af54'

    //The query in the body request is {"$in":["objectid",2]}"} which is equivalent to the following
    var query = new UntypedObject(new Dictionary<string, UntypedNode> {
        { "$in",new UntypedArray(
                    [
                        new UntypedString("objectid"),
                        new UntypedInteger(2)
                    ])
        }
    });

    var properties = await MDclient.Helper.GetSpecificPropertiesAsync(
        fileURN, modelGuid, query);

    return properties;
}