This example shows how to use the Simplygon observer to get progress events.

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

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

class CustomObserver : public Simplygon::Observer
{
	public:
	bool OnProgress(Simplygon::spObject subject, Simplygon::real progressPercent) override
	{
		printf("Progress: %f\n", progressPercent);
		// return false to abort the processing
		return true;
	}
} customObserver;


void RunReduction(Simplygon::ISimplygon* sg)
{
	// Create the reduction pipeline. 
	Simplygon::spReductionPipeline sgReductionPipeline = sg->CreateReductionPipeline();

	// Add the custom observer to the reduction pipeline. 
	sgReductionPipeline->AddObserver(&customObserver);

	// Start the reduction pipeline. 
	sgReductionPipeline->RunSceneFromFile("../Assets/SimplygonMan/SimplygonMan.obj", "output.fbx", Simplygon::EPipelineRunMode::RunInNewProcess);

}

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

	RunReduction(sg);

	Simplygon::Deinitialize(sg);
}

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

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

public class CustomObserver : Simplygon.Observer
{
    public override bool OnProgress(Simplygon.spObject subject, float progressPercent)
    {
        Console.WriteLine($"Progress: {progressPercent}");
        // return false to abort the processing
        return true;
    }
}

public class Program
{
    static private CustomObserver customObserver;

    static void RunReduction(Simplygon.ISimplygon sg)
    {
        // Create the reduction pipeline. 
        using (Simplygon.spReductionPipeline sgReductionPipeline = sg.CreateReductionPipeline())
        {
            // Add the custom observer to the reduction pipeline. 
            sgReductionPipeline.AddObserver(customObserver);

            // Start the reduction pipeline. 
            sgReductionPipeline.RunSceneFromFile("../Assets/SimplygonMan/SimplygonMan.obj", "output.fbx", Simplygon.EPipelineRunMode.RunInNewProcess);

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

# 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

class CustomObserver(Simplygon.Observer):
    def OnProgress(self, subject: Simplygon.spObject, progressPercent: float):
        print("Progress: %f" %(progressPercent))
        # return False to abort the processing
        return True

customObserver = CustomObserver()

def RunReduction(sg: Simplygon.ISimplygon):
    # Create the reduction pipeline. 
    sgReductionPipeline = sg.CreateReductionPipeline()

    # Add the custom observer to the reduction pipeline. 
    sgReductionPipeline.AddObserver(customObserver)

    # Start the reduction pipeline. 
    sgReductionPipeline.RunSceneFromFile("../Assets/SimplygonMan/SimplygonMan.obj", "output.fbx", Simplygon.EPipelineRunMode_RunInNewProcess)


if __name__ == '__main__':
    sg = simplygon_loader.init_simplygon()
    if sg is not None:

        RunReduction(sg)

    sg = None
    gc.collect()