This example shows how to use the Aggregation processor with a process selection set.

// Copyright (c) Microsoft Corporation. 
// Licensed under the MIT license. 

#include <string>
#include <stdlib.h>
#include <filesystem>
#include <future>
#include "SimplygonLoader.h"


void RunAggregation(Simplygon::ISimplygon* sg)
{
	Simplygon::spSceneImporter sgSceneImporter = sg->CreateSceneImporter();
	sgSceneImporter->SetImportFilePath( "../Assets/ObscuredTeapot/ObscuredTeapot.obj" );
	if(!sgSceneImporter->RunImport())
		throw std::exception("Failed to load ObscuredTeapot/ObscuredTeapot.obj.");
	Simplygon::spScene sgScene = sgSceneImporter->GetScene();

	// Create the aggregation processor. 
	Simplygon::spAggregationProcessor sgAggregationProcessor = sg->CreateAggregationProcessor();

	sgAggregationProcessor->SetScene( sgScene );

	Simplygon::spAggregationSettings sgAggregationSettings = sgAggregationProcessor->GetAggregationSettings();

	// Add a selection set to the scene with all nodes which should be aggregated. 
	Simplygon::spSelectionSetTable sgSceneSelectionSetTable = sgScene->GetSelectionSetTable();
	Simplygon::spSelectionSet sgAggregationTargetSelectionSet = sg->CreateSelectionSet();
	sgAggregationTargetSelectionSet->SetName("AggregationTarget");
	Simplygon::spSceneNode sgRootTeapot001 = sgScene->GetNodeFromPath("Root/Teapot001");
	if (!sgRootTeapot001.IsNull())
		sgAggregationTargetSelectionSet->AddItem(sgRootTeapot001->GetNodeGUID());
	sgSceneSelectionSetTable->AddSelectionSet(sgAggregationTargetSelectionSet);

	// Merge all geometries into a single geometry. 
	sgAggregationSettings->SetMergeGeometries( true );

	// Use the selection set created earlier. 
	sgAggregationSettings->SetProcessSelectionSetName( "AggregationTarget" );

	// Start the aggregation process. 
	sgAggregationProcessor->RunProcessing();

	Simplygon::spSceneExporter  sgSceneExporter = sg->CreateSceneExporter();
	sgSceneExporter->SetScene(sgScene);
	sgSceneExporter->SetExportFilePath( "AggregationOutput.fbx" );
	if(!sgSceneExporter->RunExport())
		throw std::exception("Failed to save AggregationOutput.fbx.");

}

int main()
{
	Simplygon::ISimplygon* sg = NULL;
	Simplygon::EErrorCodes initval = Simplygon::Initialize( &sg );
	if( initval != Simplygon::EErrorCodes::NoError )
	{
		return int(initval);
	}

	RunAggregation(sg);

	Simplygon::Deinitialize(sg);

	return 0;
}

// Copyright (c) Microsoft Corporation. 
// Licensed under the MIT license. 

using System;
using System.IO;
using System.Threading.Tasks;

public class Program
{
    static void RunAggregation(Simplygon.ISimplygon sg)
    {
        using (Simplygon.spSceneImporter sgSceneImporter = sg.CreateSceneImporter())
        {
            sgSceneImporter.SetImportFilePath( "../Assets/ObscuredTeapot/ObscuredTeapot.obj" );
            if(!sgSceneImporter.RunImport())
                throw new System.Exception("Failed to load ObscuredTeapot/ObscuredTeapot.obj.");
            Simplygon.spScene sgScene = sgSceneImporter.GetScene();

            // Create the aggregation processor. 
            using (Simplygon.spAggregationProcessor sgAggregationProcessor = sg.CreateAggregationProcessor())
            {
                sgAggregationProcessor.SetScene( sgScene );

                using (Simplygon.spAggregationSettings sgAggregationSettings = sgAggregationProcessor.GetAggregationSettings())
                {
                    // Add a selection set to the scene with all nodes which should be aggregated. 
                    using (Simplygon.spSelectionSetTable sgSceneSelectionSetTable = sgScene.GetSelectionSetTable())
                    using (Simplygon.spSelectionSet sgAggregationTargetSelectionSet = sg.CreateSelectionSet())
                    {
                        sgAggregationTargetSelectionSet.SetName("AggregationTarget");
                        Simplygon.spSceneNode sgRootTeapot001 = sgScene.GetNodeFromPath("Root/Teapot001");
                        if (!sgRootTeapot001.IsNull())
                            sgAggregationTargetSelectionSet.AddItem(sgRootTeapot001.GetNodeGUID());
                        sgSceneSelectionSetTable.AddSelectionSet(sgAggregationTargetSelectionSet);
                    }

                    // Merge all geometries into a single geometry. 
                    sgAggregationSettings.SetMergeGeometries( true );

                    // Use the selection set created earlier. 
                    sgAggregationSettings.SetProcessSelectionSetName( "AggregationTarget" );

                }
                // Start the aggregation process. 
                sgAggregationProcessor.RunProcessing();

            }
            using (Simplygon.spSceneExporter sgSceneExporter = sg.CreateSceneExporter())
            {
                sgSceneExporter.SetScene(sgScene);
                sgSceneExporter.SetExportFilePath( "AggregationOutput.fbx" );
                if(!sgSceneExporter.RunExport())
                    throw new System.Exception("Failed to save AggregationOutput.fbx.");

            }
        }
    }
    static int Main(string[] args)
    {
        using (var sg = Simplygon.Loader.InitSimplygon(out var errorCode, out var errorMessage))
        {
            if (errorCode != Simplygon.EErrorCodes.NoError)
                return (int)errorCode;
            RunAggregation(sg);
        }

        return 0;
    }
}

# Copyright (c) Microsoft Corporation. 
# Licensed under the MIT license. 

import math
import os
import sys
import glob
import gc
import threading

from pathlib import Path
from simplygon import simplygon_loader
from simplygon import Simplygon


def RunAggregation(sg: Simplygon.ISimplygon):
    sgSceneImporter = sg.CreateSceneImporter()
    sgSceneImporter.SetImportFilePath( '../Assets/ObscuredTeapot/ObscuredTeapot.obj' )
    if not sgSceneImporter.RunImport():
        raise Exception('Failed to load ObscuredTeapot/ObscuredTeapot.obj.')
    sgScene = sgSceneImporter.GetScene()

    # Create the aggregation processor. 
    sgAggregationProcessor = sg.CreateAggregationProcessor()

    sgAggregationProcessor.SetScene( sgScene )

    sgAggregationSettings = sgAggregationProcessor.GetAggregationSettings()

    # Add a selection set to the scene with all nodes which should be aggregated. 
    sgSceneSelectionSetTable = sgScene.GetSelectionSetTable()
    sgAggregationTargetSelectionSet = sg.CreateSelectionSet()
    sgAggregationTargetSelectionSet.SetName("AggregationTarget")
    sgRootTeapot001 = sgScene.GetNodeFromPath('Root/Teapot001')
    if sgRootTeapot001 is not None:
        sgAggregationTargetSelectionSet.AddItem(sgRootTeapot001.GetNodeGUID())
    sgSceneSelectionSetTable.AddSelectionSet(sgAggregationTargetSelectionSet)

    # Merge all geometries into a single geometry. 
    sgAggregationSettings.SetMergeGeometries( True )

    # Use the selection set created earlier. 
    sgAggregationSettings.SetProcessSelectionSetName( "AggregationTarget" )

    # Start the aggregation process. 
    sgAggregationProcessor.RunProcessing()

    sgSceneExporter = sg.CreateSceneExporter()
    sgSceneExporter.SetScene(sgScene)
    sgSceneExporter.SetExportFilePath( 'AggregationOutput.fbx' )
    if not sgSceneExporter.RunExport():
        raise Exception('Failed to save AggregationOutput.fbx.')


if __name__ == '__main__':
    sg = simplygon_loader.init_simplygon()
    if sg is None:
        exit(Simplygon.GetLastInitializationError())

    RunAggregation(sg)

    sg = None
    gc.collect()