Request

Response

    Selective Loading Using Queries

    Selective Loading uses spatial and property queries to filter the model geometry and load only what you need. It allows you to provide a better experience interacting with the 3D scene by:

    • Improving the load time
    • Loading only the portion of the model required

    Currently, the API focuses on load-time optimizations and only load-time filtering is supported. Minor, known issues in the progressive rendering and the delay in time-to-first-pixel when using spatial filters will be addressed in future releases.

    Example:

    ../../../../_images/selective-loading-hyperlink1.png

    The image on the left shows a model without the loading filters applied. The middle image shows an axis-aligned box (blue) being used as the spatial filter to define the portion of the model to load. The image on the right shows the model loaded with the filter load-option passed to loadDocumentNode. The same option can be provided to viewer.loadModel.

    Quickstart Example for Load-time Filtering

    To restrict model loading to certain areas or types of geometry, use queries to filter what to load using loadDocumentNode options. A load-time filter can be set by specifying a spatial and/or a property query using the filter load-option.

    The following example creates a load-time filter using a spatial_query. It describes a condition for testing an axis-aligned bounding box (aabbox) against the given axis-aligned box (aabox). Objects that do not fulfill the condition are not loaded and only the objects in the shaded area are loaded.

    const viewer = new Autodesk.Viewing.GuiViewer3D(document.getElementById('viewer'));
    Autodesk.Viewing.Initializer(options, () => {
        viewer.start();
        Autodesk.Viewing.Document.load(documentID, onDocumentLoadSuccess,
            () => console.error('Failed to fetch the manifest.'));
    });
    
    function onDocumentLoadSuccess(viewerDocument) {
        const defaultModel = viewerDocument.getRoot().getDefaultGeometry();
        viewer.loadDocumentNode(viewerDocument, defaultModel, { // ...options
            filter: {
                "spatial_query": {
                    "$encloses": [ { "aabox": [ -21.0, 37.0, -4.0, 46.0, 59.0, 21.0 ] } ]
                },
            }
        });
    }
    
    Show More

    Try it out

    You can interact and experiment with the viewer in the following example (the blue box shows the boundary of a simple, spatial query):

    Tip: To experiment with the Viewer click EDIT ON CODEPEN at upper right in the example.

    Spatial Query Language

    Spatial conditions are specified using a spatial query language. A spatial query comprises a spatial condition (<scondition>).

    <scondition>

    Spatial conditions are composed of building blocks that determine whether an object should be loaded or not. Usually these are an expression, a primitive, an optional proxy, and in some cases additional parameters:

    • Primitives define what to test objects against. In the example above, all objects are tested against an axis-aligned box.
    • Proxies define how to represent objects when testing them against the primitive. This could be the object’s axis-aligned bounding box, or a bounding sphere, for example. The proxy part of a condition is optional and defaults to the object’s bounding box, which is the only proxy that is currently supported.
    • Expressions define how to interpret the proxy-primitive check. For example, an object could pass the condition if its bounding box intersects the given primitive, or it could be required to be fully enclosed.

    Conditions can be negated, combined and nested as illustrated below.

    ConditionDescription
    { "$intersects": [ <sprimitive> ] } True, if the primitive intersects with the objects’s axis-aligned bounding box.
    { "$encloses": [ <sprimitive>, <sproxy>?, epsilon? ] } True, if the primitive has a volume and fully encloses the objects’s axis-aligned bounding box. sproxy (optional) defines the type of the bounding box. Defaults to aabbox if not provided. epsilon (optional) is a scalar that expands each dimension of the primitive. Defaults to 0.0 if not provided.
    { "$extent": [ <threshold> ] } True, if the volume of the objects’s axis-aligned bounding box (world space) passes the threshold.
    { "$not": <scondition> } Inverts the given condition.
    { "$or": [ <scondition1>, <scondition2>, ... ] } Any of the given conditions must be fulfilled.
    { "$and": [ <scondition1>, <scondition2>, ... ] } All of the given conditions must be fulfilled.

    <sprimitive>

    Spatial primitives are basic geometries such as points, lines, planes, spheres, and axis-aligned boxes that can be used to create spatial conditions. Currently, only the axis-aligned box is supported.

    PrimitiveSpecificationExample
    aabox [ minx, miny, minz, maxx, maxy, maxz ] { "aabox": [ -3.3,  1.1,  0.4, -1.8,  3.9,  2.7 ] }

    <sproxy>

    Spatial proxies describe the type of a simplified geometrical representations of objects that are used for the evaluation of a spatial condition. Currently, only axis-aligned bounding box is supported and the parameter is not explicitly required.

    ProxyDescription
    aabbox Axis-Aligned Bounding Box

    Spatial Query Examples

    Simple Example:

    "spatial_query": { "$encloses": [ { "aabox": [ -0.3, -3.3, -4.9, +0.0, -3.2, -2.1 ] } ] }
    

    Complex Example:

    "spatial_query": { "$or": [
    
            /* two regions of interest where objects should be loaded */
            { "$encloses": [ { "aabox": [ -168.99, -226.19, -739.92, -133.78, -192.75, 978.69 ] } ] },
            { "$encloses": [ { "aabox": [ -389.19, -368.12,  836.04,  382.63,  140.48, 978.69 ] } ] },
    
            { "$and": [
    
                /* two regions that should remain empty (not intersecting with the scene objects) */
                { "$not": { "$or": [
                        { "$intersects": [ { "aabox": [  -88.49, -331.87, -536.42, 486.78, 350.62, -314.62 ] } ] },
                        { "$intersects": [ { "aabox": [ -285.78, -170.97,  119.58, -10.78, 353.67,  581.08 ] } ] }
                    ] } },
    
                /* objects should pass a minimal world-space volume */
                { "$extent": 100000.0 } ] }
            ] }
    
    Show More

    Immediate Spatial Evaluation

    Spatial queries are evaluated per object as soon as all objects and their exact bounding volumes are available. For large models consisting of lots of individual objects, this can introduce a minor but notable offset to the loading time. In this case, the spatial evaluation behavior can be changed to immediate evaluation using the spatial_behavior filter option. Here, preliminary, approximate bounding volumes are used for spatial evaluation once an object is known to the loader, likely leading to inaccuracies in filter evaluation:

    viewer.loadDocumentNode(viewerDocument, defaultModel, { // ...options
        filter: {
            "spatial_behavior": "immediate", // or "exact" (default)
            "spatial_query": { ... },
        }
    });
    

    Property Query Language

    The property queries use a simplified version of the ACC Model Property Service Query Language, but with a reduced feature set. Only $or, $and, $not, $in, $eq, $ne, $like, $isnull, $notnull, and $coalesce expressions are currently supported.

    Property Query Examples

    Simple Example:

    "property_query": {
        "$and": [
            { "$notnull": "s.props.p20d8441e" },
            { "$notnull": "s.props.p30db51f9" },
            { "$notnull": "s.props.p13b6b3a0" }
        ] }
    

    Complex Example:

    "property_query": [
        { "s.props.p4735026f": "'VALV'" },
        { "s.props.p4735026f": "'FBLI'" },
        { "s.props.p4735026f": "'TUBI'" },
        { "s.props.p4735026f": "'INST'" },
        { "s.props.p4735026f": "'ELBO'" },
        { "s.props.p4735026f": "'REDU'" },
        { "s.props.p4735026f": "'ATTA'" },
        { "s.props.p4735026f": "'FLAN'" } ]
    
    Show More

    How to Get Property Hashes

    Currently, property queries rely on property hashes. There are two ways to acquire these, either directly or indirectly.

    Direct Enumeration of Property Hashes: To obtain the available properties and their hashes, you can enumerate them as soon as the property database is loaded using the following command:

    const propertyHashes = await model.getPropertyHashes();
    

    Hash Lookup Syntax: Instead of using the s.props.p... syntax, you can utilize a preliminary property lookup syntax to perform implicit property hash lookups:

    // Match basic walls (by name property) and all objects that have CENTRIFUGE in their LTS description
    "property_query": [
        // instead of { "s.props.p153cb174": "'Basic Wall'" },
        { "?name": "'Basic Wall'" }, // note the ? indicating a look-up
        { "?Base Constraint": "'Level 1'" } ]
    

    A hash lookup currently requires an exact match of the property name to produce valid query results. If no objects are loaded, consider modifying the property query for better search outcomes.

    Top-level Filter Condition

    When both spatial_query and property_query are set, an object passes filtering if both conditions are met. This behavior can be specified in the filter load option by specifying the root_condition to be either and (default) or or:

    viewer.loadDocumentNode(viewerDocument, defaultModel, { // ...options
        filter: {
            "root_condition": "or", // or "and" (default)
            "spatial_query": { ... },
            "property_query": { ... },
        }
    });
    

    When and is specified, filtering cannot start immediately but needs to wait until all object bounds are known and properties are loaded.

     
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    NMPI Display
    We use NMPI Display to deploy digital advertising on sites supported by NMPI Display. Ads are based on both NMPI Display data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that NMPI Display has collected from you. We use the data that we provide to NMPI Display to better customize your digital advertising experience and present you with more relevant ads. NMPI Display Privacy Policy
    VK
    We use VK to deploy digital advertising on sites supported by VK. Ads are based on both VK data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that VK has collected from you. We use the data that we provide to VK to better customize your digital advertising experience and present you with more relevant ads. VK Privacy Policy
    Adobe Target
    We use Adobe Target to test new features on our sites and customize your experience of these features. To do this, we collect behavioral data while you’re on our sites. This data may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, your IP address or device ID, your Autodesk ID, and others. You may experience a different version of our sites based on feature testing, or view personalized content based on your visitor attributes. Adobe Target Privacy Policy
    Google Analytics (Advertising)
    We use Google Analytics (Advertising) to deploy digital advertising on sites supported by Google Analytics (Advertising). Ads are based on both Google Analytics (Advertising) data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Google Analytics (Advertising) has collected from you. We use the data that we provide to Google Analytics (Advertising) to better customize your digital advertising experience and present you with more relevant ads. Google Analytics (Advertising) Privacy Policy
    Trendkite
    We use Trendkite to deploy digital advertising on sites supported by Trendkite. Ads are based on both Trendkite data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Trendkite has collected from you. We use the data that we provide to Trendkite to better customize your digital advertising experience and present you with more relevant ads. Trendkite Privacy Policy
    Hotjar
    We use Hotjar to deploy digital advertising on sites supported by Hotjar. Ads are based on both Hotjar data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Hotjar has collected from you. We use the data that we provide to Hotjar to better customize your digital advertising experience and present you with more relevant ads. Hotjar Privacy Policy
    6 Sense
    We use 6 Sense to deploy digital advertising on sites supported by 6 Sense. Ads are based on both 6 Sense data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that 6 Sense has collected from you. We use the data that we provide to 6 Sense to better customize your digital advertising experience and present you with more relevant ads. 6 Sense Privacy Policy
    Terminus
    We use Terminus to deploy digital advertising on sites supported by Terminus. Ads are based on both Terminus data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Terminus has collected from you. We use the data that we provide to Terminus to better customize your digital advertising experience and present you with more relevant ads. Terminus Privacy Policy
    StackAdapt
    We use StackAdapt to deploy digital advertising on sites supported by StackAdapt. Ads are based on both StackAdapt data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that StackAdapt has collected from you. We use the data that we provide to StackAdapt to better customize your digital advertising experience and present you with more relevant ads. StackAdapt Privacy Policy
    The Trade Desk
    We use The Trade Desk to deploy digital advertising on sites supported by The Trade Desk. Ads are based on both The Trade Desk data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that The Trade Desk has collected from you. We use the data that we provide to The Trade Desk to better customize your digital advertising experience and present you with more relevant ads. The Trade Desk Privacy Policy
    RollWorks
    We use RollWorks to deploy digital advertising on sites supported by RollWorks. Ads are based on both RollWorks data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that RollWorks has collected from you. We use the data that we provide to RollWorks to better customize your digital advertising experience and present you with more relevant ads. RollWorks Privacy Policy

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    Your experience. Your choice.

    We care about your privacy. The data we collect helps us understand how you use our products, what information you might be interested in, and what we can improve to make your engagement with Autodesk more rewarding.

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    Explore the benefits of a customized experience by managing your privacy settings for this site or visit our Privacy Statement to learn more about your options.