Showing attributes

[MazenTalaat]

Hello,

Is there a way to select an object and show its attributes?

Thanks in advance.

[dun82]

Thanks Mazen, but can you link the string data with the feature ID? 

[Ammar361421]

Hello @MazenTalaat , could you please help me on how you used the AttributeProcessor ?

Thank you in advance

[MazenTalaat]

Hello again,

Thank you dun82 for sharing your code in the other thread!

Finally, I managed to process the attributes and show the data, here are the used functions to do so.
(OBJECTID can be processed as Int)

private void Setup3DAttributes(ArcGIS3DObjectSceneLayer Layer)
    {
        if (Layer == null)
        {
            return;
        }
        var layerAttributes = ArcGISImmutableArray<String>.CreateBuilder();
        layerAttributes.Add("OBJECTID");

        var renderAttributeDescriptions = ArcGISImmutableArray<Esri.GameEngine.Attributes.ArcGISVisualizationAttributeDescription>.CreateBuilder();
        renderAttributeDescriptions.Add(new Esri.GameEngine.Attributes.ArcGISVisualizationAttributeDescription("IsBuildingOfInterest", Esri.GameEngine.Attributes.ArcGISVisualizationAttributeType.Float32));

        attributeProcessor = new Esri.GameEngine.Attributes.ArcGISAttributeProcessor();

        attributeProcessor.ProcessEvent += (ArcGISImmutableArray<Esri.GameEngine.Attributes.ArcGISAttribute> layerNodeAttributes, ArcGISImmutableArray<Esri.GameEngine.Attributes.ArcGISVisualizationAttribute> renderNodeAttributes) =>
        {
                var fidAttribute = layerNodeAttributes.At(0);
            /* Choose a function to process the data depending on the type
                ForEachInt64(fidAttribute, (Int64 element, Int32 index) =>
                {
                    //save in a list or print
                });

                ForEachString(fidAttribute, (string element, Int32 index) =>
                {
                    //save in a list or print
                });

                ForEachDouble(fidAttribute, (float element, Int32 index) =>
                {
                    //save in a list or print
                });
            */
        };
        Layer.SetAttributesToVisualize(layerAttributes.MoveToArray(), renderAttributeDescriptions.MoveToArray(), attributeProcessor);
    }

private void ForEachString(Esri.GameEngine.Attributes.ArcGISAttribute attribute, Action<string, Int32> predicate)
    {
        unsafe
        {
            var buffer = attribute.Data;
            var unsafePtr = NativeArrayUnsafeUtility.GetUnsafePtr(buffer);
            var metadata = (int*)unsafePtr;

            var count = metadata[0];

            // First integer = number of string on this array
            // Second integer = sum(strings length)
            // Next N-values (N = value of index 0 ) = Length of each string

            IntPtr stringPtr = (IntPtr)unsafePtr + (2 + count) * sizeof(int);

            for (var i = 0; i < count; ++i)
            {
                string element = null;

                // If the length of the string element is 0, it means the element is null
                if (metadata[2 + i] > 0)
                {
                    element = Marshal.PtrToStringAnsi(stringPtr, metadata[2 + i] - 1);
                }

                predicate(element, i);

                stringPtr += metadata[2 + i];
            }
        }
    }

    void ForEachInt64(Esri.GameEngine.Attributes.ArcGISAttribute attribute, Action<Int64, Int32> predicate)
    {
        unsafe
        {
            var buffer = attribute.Data;
            var unsafePtr = NativeArrayUnsafeUtility.GetUnsafePtr(buffer);
            var metadata = (int*)unsafePtr;
            var count = attribute.Data.Length/4;

            for (var i = 0; i < count; ++i)
            {
                predicate((Int64)metadata[i], i);
            }
        }
    }

    void ForEachDouble(Esri.GameEngine.Attributes.ArcGISAttribute attribute, Action<float, Int32> predicate)
    {
        unsafe
        {
            var buffer = attribute.Data;
            var unsafePtr = NativeArrayUnsafeUtility.GetUnsafePtr(buffer);
            var metadata = (double*)unsafePtr;
            var count = attribute.Data.Length / 8;

            for (var i = 0; i < count; ++i)
            {
                predicate((float)metadata[i], i);
            }
        }
    }

[WH1981]

Hello MazenTalaat,

I also have a Unity project with ArcGIS layers and with a raycast i get a Feature ID (with the Hit test example). Now i want to make the attribuut values visible in a text field of that Feature. Is adding your code above enough to get this values?

RaycastHit hit;

if (Physics.Raycast(ray, out hit))
{
var arcGISRaycastHit = arcGISMapComponent.GetArcGISRaycastHit(hit);
var layer = arcGISRaycastHit.layer;
var featureId = arcGISRaycastHit.featureId;

if (layer != null && featureId != -1)
{
featureText.text = featureId.ToString();

}
}
}
}