This example shows how to use the simplygon scene data. First we create a scene. We fetch the scene's material table and add a red diffuse and a red specular material. We then create two cube geometries with one assigned the diffuse material and the other the specular material. Two scene mesh nodes are created that refer to the cubes. The scene meshes are then added to the scene's root node as children.

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

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


void SaveScene(Simplygon::ISimplygon* sg, Simplygon::spScene sgScene, const char* path)
{
	// Create scene exporter. 
	Simplygon::spSceneExporter sgSceneExporter = sg->CreateSceneExporter();
	sgSceneExporter->SetExportFilePath(path);
	sgSceneExporter->SetScene(sgScene);
	
	// Run scene exporter. 
	bool exportResult = sgSceneExporter->RunExport();
	if (!exportResult)
	{
		throw std::exception("Failed to save scene.");
	}
}

void CheckLog(Simplygon::ISimplygon* sg)
{
	// Check if any errors occurred. 
	bool hasErrors = sg->ErrorOccurred();
	if (hasErrors)
	{
		Simplygon::spStringArray errors = sg->CreateStringArray();
		sg->GetErrorMessages(errors);
		auto errorCount = errors->GetItemCount();
		if (errorCount > 0)
		{
			printf("%s\n", "Errors:");
			for (auto errorIndex = 0U; errorIndex < errorCount; ++errorIndex)
			{
				Simplygon::spString errorString = errors->GetItem((int)errorIndex);
				printf("%s\n", errorString.c_str());
			}
			sg->ClearErrorMessages();
		}
	}
	else
	{
		printf("%s\n", "No errors.");
	}
	
	// Check if any warnings occurred. 
	bool hasWarnings = sg->WarningOccurred();
	if (hasWarnings)
	{
		Simplygon::spStringArray warnings = sg->CreateStringArray();
		sg->GetWarningMessages(warnings);
		auto warningCount = warnings->GetItemCount();
		if (warningCount > 0)
		{
			printf("%s\n", "Warnings:");
			for (auto warningIndex = 0U; warningIndex < warningCount; ++warningIndex)
			{
				Simplygon::spString warningString = warnings->GetItem((int)warningIndex);
				printf("%s\n", warningString.c_str());
			}
			sg->ClearWarningMessages();
		}
	}
	else
	{
		printf("%s\n", "No warnings.");
	}
}

Simplygon::spGeometryData CreateCube(Simplygon::ISimplygon* sg, Simplygon::rid materialId)
{
	const int vertexCount = 8;
	const int triangleCount = 12;
	const int cornerCount = triangleCount * 3;
	int cornerIds[] = 
	{
		0, 1, 4, 
		4, 1, 5, 
		5, 1, 6, 
		1, 2, 6, 
		6, 2, 3, 
		6, 3, 7, 
		7, 3, 0, 
		7, 0, 4, 
		0, 2, 1, 
		0, 3, 2, 
		4, 5, 6, 
		4, 6, 7
	};
	float vertexCoordinates[] = 
	{
		1.0f, -1.0f, 1.0f, 
		1.0f, -1.0f, -1.0f, 
		-1.0f, -1.0f, -1.0f, 
		-1.0f, -1.0f, 1.0f, 
		1.0f, 1.0f, 1.0f, 
		1.0f, 1.0f, -1.0f, 
		-1.0f, 1.0f, -1.0f, 
		-1.0f, 1.0f, 1.0f
	};
	
	// Create the Geometry. All geometry data will be loaded into this object. 
	Simplygon::spGeometryData sgGeometryData = sg->CreateGeometryData();
	
	// Set vertex- and triangle-counts for the Geometry. 
	// NOTE: The number of vertices and triangles has to be set before vertex- and triangle-data is 
	// loaded into the GeometryData. 
	sgGeometryData->SetVertexCount(vertexCount);
	sgGeometryData->SetTriangleCount(triangleCount);
	
	// Array with vertex-coordinates. Will contain 3 real-values for each vertex in the geometry. 
	Simplygon::spRealArray sgCoords = sgGeometryData->GetCoords();
	
	// Array with triangle-data. Will contain 3 ids for each corner of each triangle, so the triangles 
	// know what vertices to use. 
	Simplygon::spRidArray sgVertexIds = sgGeometryData->GetVertexIds();
	
	// Add material data. Materials are assigned per triangle. 
	sgGeometryData->AddMaterialIds();
	Simplygon::spRidArray sgMaterialIds = sgGeometryData->GetMaterialIds();
	
	// Add vertex-coordinates array to the Geometry. 
	sgCoords->SetData(vertexCoordinates, vertexCount * 3);
	
	// Add triangles to the Geometry. Each triangle-corner contains the id for the vertex that corner 
	// uses. 
	sgVertexIds->SetData(cornerIds, cornerCount);
	
	// Loop through all the triangles an assign material. 
	for (auto triangleIndex = 0U; triangleIndex < triangleCount; ++triangleIndex)
	{
		sgMaterialIds->SetItem((int)triangleIndex, materialId);
	}
	
	// Return created cube geometry data. 
	return sgGeometryData;
}

void RunExample(Simplygon::ISimplygon* sg)
{
	// Create a Simplygon scene. 
	Simplygon::spScene sgScene = sg->CreateScene();
	
	// Get material table from the scene. 
	Simplygon::spMaterialTable sgMaterialTable = sgScene->GetMaterialTable();
	
	// Create a red diffuse material and a red specular material. 
	Simplygon::spShadingColorNode sgRedColorNode = sg->CreateShadingColorNode();
	sgRedColorNode->SetColor(0.5f, 0.0f, 0.0f, 0.0f);
	Simplygon::spMaterial sgDiffuseRedMaterial = sg->CreateMaterial();
	sgDiffuseRedMaterial->SetName("red_diffuse");
	sgDiffuseRedMaterial->AddMaterialChannel(Simplygon::SG_MATERIAL_CHANNEL_DIFFUSE);
	sgDiffuseRedMaterial->SetShadingNetwork(Simplygon::SG_MATERIAL_CHANNEL_DIFFUSE, sgRedColorNode);
	Simplygon::spMaterial sgSpecularRedMaterial = sg->CreateMaterial();
	sgSpecularRedMaterial->SetName("red_specular");
	sgSpecularRedMaterial->AddMaterialChannel(Simplygon::SG_MATERIAL_CHANNEL_SPECULAR);
	sgSpecularRedMaterial->SetShadingNetwork(Simplygon::SG_MATERIAL_CHANNEL_SPECULAR, sgRedColorNode);
	
	// Add the materials to the material table. 
	Simplygon::rid diffuseMaterialId = sgMaterialTable->AddMaterial(sgDiffuseRedMaterial);
	Simplygon::rid specularMaterialId = sgMaterialTable->AddMaterial(sgSpecularRedMaterial);
	
	// Create two scene mesh objects. 
	Simplygon::spSceneMesh sgCubeMesh1 = sg->CreateSceneMesh();
	Simplygon::spSceneMesh sgCubeMesh2 = sg->CreateSceneMesh();
	
	// Set name on the scene meshes. 
	sgCubeMesh1->SetName("Cube1");
	sgCubeMesh1->SetOriginalName("Cube1");
	sgCubeMesh2->SetName("Cube2");
	sgCubeMesh2->SetOriginalName("Cube2");
	
	// Create cube geometry. 
	Simplygon::spGeometryData sgGeometryDataCube1 = CreateCube(sg, diffuseMaterialId);
	Simplygon::spGeometryData sgGeometryDataCube2 = CreateCube(sg, specularMaterialId);
	sgCubeMesh1->SetGeometry(sgGeometryDataCube1);
	sgCubeMesh2->SetGeometry(sgGeometryDataCube2);
	
	// Add the two scene meshes as child to the root node of the scene. 
	sgScene->GetRootNode()->AddChild(sgCubeMesh1);
	sgScene->GetRootNode()->AddChild(sgCubeMesh2);
	
	// Create a transform node. 
	Simplygon::spTransform3 sgTransform = sg->CreateTransform3();
	
	// Set the transform to use premultiply. 
	sgTransform->PreMultiply();
	
	// Add 45 degree rotation and 5 units translation. 
	sgTransform->AddRotation(0.785f, 0.0f, 1.0f, 0.0f);
	sgTransform->AddRotation(0.785f, 1.0f, 0.0f, 0.0f);
	sgTransform->AddTranslation(0.0f, 5.0f, 0.0f);
	
	// Apply transformation on the second cube node. 
	Simplygon::spMatrix4x4 sgTransformMatrix = sgTransform->GetMatrix();
	sgCubeMesh2->GetRelativeTransform()->DeepCopy(sgTransformMatrix);
	
	// Save example scene to output.obj. 	
	printf("%s\n", "Save example scene to output.obj.");
	SaveScene(sg, sgScene, "output.obj");
	
	// Check log for any warnings or errors. 	
	printf("%s\n", "Check log for any warnings or errors.");
	CheckLog(sg);
}

int main()
{
	Simplygon::ISimplygon* sg = NULL;
	Simplygon::EErrorCodes initval = Simplygon::Initialize( &sg );
	if( initval != Simplygon::EErrorCodes::NoError )
	{
		printf( "Failed to initialize Simplygon: ErrorCode(%d)", (int)initval );
		return int(initval);
	}

	RunExample(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 SaveScene(Simplygon.ISimplygon sg, Simplygon.spScene sgScene, string path)
    {
        // Create scene exporter. 
        using Simplygon.spSceneExporter sgSceneExporter = sg.CreateSceneExporter();
        sgSceneExporter.SetExportFilePath(path);
        sgSceneExporter.SetScene(sgScene);
        
        // Run scene exporter. 
        bool exportResult = sgSceneExporter.RunExport();
        if (!exportResult)
        {
            throw new System.Exception("Failed to save scene.");
        }
    }
    static void CheckLog(Simplygon.ISimplygon sg)
    {
        // Check if any errors occurred. 
        bool hasErrors = sg.ErrorOccurred();
        if (hasErrors)
        {
            Simplygon.spStringArray errors = sg.CreateStringArray();
            sg.GetErrorMessages(errors);
            var errorCount = errors.GetItemCount();
            if (errorCount > 0)
            {
                Console.WriteLine("Errors:");
                for (uint errorIndex = 0; errorIndex < errorCount; ++errorIndex)
                {
                    string errorString = errors.GetItem((int)errorIndex);
                    Console.WriteLine(errorString);
                }
                sg.ClearErrorMessages();
            }
        }
        else
        {
            Console.WriteLine("No errors.");
        }
        
        // Check if any warnings occurred. 
        bool hasWarnings = sg.WarningOccurred();
        if (hasWarnings)
        {
            Simplygon.spStringArray warnings = sg.CreateStringArray();
            sg.GetWarningMessages(warnings);
            var warningCount = warnings.GetItemCount();
            if (warningCount > 0)
            {
                Console.WriteLine("Warnings:");
                for (uint warningIndex = 0; warningIndex < warningCount; ++warningIndex)
                {
                    string warningString = warnings.GetItem((int)warningIndex);
                    Console.WriteLine(warningString);
                }
                sg.ClearWarningMessages();
            }
        }
        else
        {
            Console.WriteLine("No warnings.");
        }
    }
    static Simplygon.spGeometryData CreateCube(Simplygon.ISimplygon sg, int materialId)
    {
        const int vertexCount = 8;
        const int triangleCount = 12;
        const int cornerCount = triangleCount * 3;
        int[] cornerIds = new int[]
        {
            0, 1, 4, 
            4, 1, 5, 
            5, 1, 6, 
            1, 2, 6, 
            6, 2, 3, 
            6, 3, 7, 
            7, 3, 0, 
            7, 0, 4, 
            0, 2, 1, 
            0, 3, 2, 
            4, 5, 6, 
            4, 6, 7
        };
        float[] vertexCoordinates = new float[]
        {
            1.0f, -1.0f, 1.0f, 
            1.0f, -1.0f, -1.0f, 
            -1.0f, -1.0f, -1.0f, 
            -1.0f, -1.0f, 1.0f, 
            1.0f, 1.0f, 1.0f, 
            1.0f, 1.0f, -1.0f, 
            -1.0f, 1.0f, -1.0f, 
            -1.0f, 1.0f, 1.0f
        };
        
        // Create the Geometry. All geometry data will be loaded into this object. 
        Simplygon.spGeometryData sgGeometryData = sg.CreateGeometryData();
        
        // Set vertex- and triangle-counts for the Geometry. 
        // NOTE: The number of vertices and triangles has to be set before vertex- and triangle-data is 
        // loaded into the GeometryData. 
        sgGeometryData.SetVertexCount(vertexCount);
        sgGeometryData.SetTriangleCount(triangleCount);
        
        // Array with vertex-coordinates. Will contain 3 real-values for each vertex in the geometry. 
        Simplygon.spRealArray sgCoords = sgGeometryData.GetCoords();
        
        // Array with triangle-data. Will contain 3 ids for each corner of each triangle, so the triangles 
        // know what vertices to use. 
        Simplygon.spRidArray sgVertexIds = sgGeometryData.GetVertexIds();
        
        // Add material data. Materials are assigned per triangle. 
        sgGeometryData.AddMaterialIds();
        Simplygon.spRidArray sgMaterialIds = sgGeometryData.GetMaterialIds();
        
        // Add vertex-coordinates array to the Geometry. 
        sgCoords.SetData(vertexCoordinates, vertexCount * 3);
        
        // Add triangles to the Geometry. Each triangle-corner contains the id for the vertex that corner 
        // uses. 
        sgVertexIds.SetData(cornerIds, cornerCount);
        
        // Loop through all the triangles an assign material. 
        for (uint triangleIndex = 0; triangleIndex < triangleCount; ++triangleIndex)
        {
            sgMaterialIds.SetItem((int)triangleIndex, materialId);
        }
        
        // Return created cube geometry data. 
        return sgGeometryData;
    }
    static void RunExample(Simplygon.ISimplygon sg)
    {
        // Create a Simplygon scene. 
        Simplygon.spScene sgScene = sg.CreateScene();
        
        // Get material table from the scene. 
        Simplygon.spMaterialTable sgMaterialTable = sgScene.GetMaterialTable();
        
        // Create a red diffuse material and a red specular material. 
        Simplygon.spShadingColorNode sgRedColorNode = sg.CreateShadingColorNode();
        sgRedColorNode.SetColor(0.5f, 0.0f, 0.0f, 0.0f);
        Simplygon.spMaterial sgDiffuseRedMaterial = sg.CreateMaterial();
        sgDiffuseRedMaterial.SetName("red_diffuse");
        sgDiffuseRedMaterial.AddMaterialChannel(Simplygon.Simplygon.SG_MATERIAL_CHANNEL_DIFFUSE);
        sgDiffuseRedMaterial.SetShadingNetwork(Simplygon.Simplygon.SG_MATERIAL_CHANNEL_DIFFUSE, sgRedColorNode);
        Simplygon.spMaterial sgSpecularRedMaterial = sg.CreateMaterial();
        sgSpecularRedMaterial.SetName("red_specular");
        sgSpecularRedMaterial.AddMaterialChannel(Simplygon.Simplygon.SG_MATERIAL_CHANNEL_SPECULAR);
        sgSpecularRedMaterial.SetShadingNetwork(Simplygon.Simplygon.SG_MATERIAL_CHANNEL_SPECULAR, sgRedColorNode);
        
        // Add the materials to the material table. 
        int diffuseMaterialId = sgMaterialTable.AddMaterial(sgDiffuseRedMaterial);
        int specularMaterialId = sgMaterialTable.AddMaterial(sgSpecularRedMaterial);
        
        // Create two scene mesh objects. 
        Simplygon.spSceneMesh sgCubeMesh1 = sg.CreateSceneMesh();
        Simplygon.spSceneMesh sgCubeMesh2 = sg.CreateSceneMesh();
        
        // Set name on the scene meshes. 
        sgCubeMesh1.SetName("Cube1");
        sgCubeMesh1.SetOriginalName("Cube1");
        sgCubeMesh2.SetName("Cube2");
        sgCubeMesh2.SetOriginalName("Cube2");
        
        // Create cube geometry. 
        Simplygon.spGeometryData sgGeometryDataCube1 = CreateCube(sg, diffuseMaterialId);
        Simplygon.spGeometryData sgGeometryDataCube2 = CreateCube(sg, specularMaterialId);
        sgCubeMesh1.SetGeometry(sgGeometryDataCube1);
        sgCubeMesh2.SetGeometry(sgGeometryDataCube2);
        
        // Add the two scene meshes as child to the root node of the scene. 
        sgScene.GetRootNode().AddChild(sgCubeMesh1);

        sgScene.GetRootNode().AddChild(sgCubeMesh2);

        
        // Create a transform node. 
        Simplygon.spTransform3 sgTransform = sg.CreateTransform3();
        
        // Set the transform to use premultiply. 
        sgTransform.PreMultiply();
        
        // Add 45 degree rotation and 5 units translation. 
        sgTransform.AddRotation(0.785f, 0.0f, 1.0f, 0.0f);
        sgTransform.AddRotation(0.785f, 1.0f, 0.0f, 0.0f);
        sgTransform.AddTranslation(0.0f, 5.0f, 0.0f);
        
        // Apply transformation on the second cube node. 
        Simplygon.spMatrix4x4 sgTransformMatrix = sgTransform.GetMatrix();
        sgCubeMesh2.GetRelativeTransform().DeepCopy(sgTransformMatrix);

        
        // Save example scene to output.obj.         
        Console.WriteLine("Save example scene to output.obj.");
        SaveScene(sg, sgScene, "output.obj");
        
        // Check log for any warnings or errors.         
        Console.WriteLine("Check log for any warnings or errors.");
        CheckLog(sg);
    }
    static int Main(string[] args)
    {
        using var sg = Simplygon.Loader.InitSimplygon(out var errorCode, out var errorMessage);
        if (errorCode != Simplygon.EErrorCodes.NoError)
        {
            Console.WriteLine( $"Failed to initialize Simplygon: ErrorCode({(int)errorCode}) {errorMessage}" );
            return (int)errorCode;
        }
        RunExample(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 simplygon9 import simplygon_loader
from simplygon9 import Simplygon


def SaveScene(sg: Simplygon.ISimplygon, sgScene:Simplygon.spScene, path: str):
    # Create scene exporter. 
    sgSceneExporter = sg.CreateSceneExporter()
    sgSceneExporter.SetExportFilePath(path)
    sgSceneExporter.SetScene(sgScene)
    
    # Run scene exporter. 
    exportResult = sgSceneExporter.RunExport()
    if not exportResult:
        raise Exception('Failed to save scene.')

def CheckLog(sg: Simplygon.ISimplygon):
    # Check if any errors occurred. 
    hasErrors = sg.ErrorOccurred()
    if hasErrors:
        errors = sg.CreateStringArray()
        sg.GetErrorMessages(errors)
        errorCount = errors.GetItemCount()
        if errorCount > 0:
            print("Errors:")
            for errorIndex in range(errorCount):
                errorString = errors.GetItem(errorIndex)
                print(errorString)
            sg.ClearErrorMessages()
    else:
        print("No errors.")
    
    # Check if any warnings occurred. 
    hasWarnings = sg.WarningOccurred()
    if hasWarnings:
        warnings = sg.CreateStringArray()
        sg.GetWarningMessages(warnings)
        warningCount = warnings.GetItemCount()
        if warningCount > 0:
            print("Warnings:")
            for warningIndex in range(warningCount):
                warningString = warnings.GetItem(warningIndex)
                print(warningString)
            sg.ClearWarningMessages()
    else:
        print("No warnings.")

def CreateCube(sg: Simplygon.ISimplygon, materialId: int):
    vertexCount = 8
    triangleCount = 12
    cornerCount = triangleCount * 3
    cornerIds = [ 0, 1, 4, 4, 1, 5, 5, 1, 6, 1, 2, 6, 6, 2, 3, 6, 3, 7, 7, 3, 0, 7, 0, 4, 0, 2, 1, 0, 3, 2, 4, 5, 6, 4, 6, 7 ]
    vertexCoordinates = [ 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0 ]
    
    # Create the Geometry. All geometry data will be loaded into this object. 
    sgGeometryData = sg.CreateGeometryData()
    
    # Set vertex- and triangle-counts for the Geometry. 
    # NOTE: The number of vertices and triangles has to be set before vertex- and triangle-data is 
    # loaded into the GeometryData. 
    sgGeometryData.SetVertexCount(vertexCount)
    sgGeometryData.SetTriangleCount(triangleCount)
    
    # Array with vertex-coordinates. Will contain 3 real-values for each vertex in the geometry. 
    sgCoords = sgGeometryData.GetCoords()
    
    # Array with triangle-data. Will contain 3 ids for each corner of each triangle, so the triangles 
    # know what vertices to use. 
    sgVertexIds = sgGeometryData.GetVertexIds()
    
    # Add material data. Materials are assigned per triangle. 
    sgGeometryData.AddMaterialIds()
    sgMaterialIds = sgGeometryData.GetMaterialIds()
    
    # Add vertex-coordinates array to the Geometry. 
    sgCoords.SetData(vertexCoordinates, vertexCount * 3)
    
    # Add triangles to the Geometry. Each triangle-corner contains the id for the vertex that corner 
    # uses. 
    sgVertexIds.SetData(cornerIds, cornerCount)
    
    # Loop through all the triangles an assign material. 
    for triangleIndex in range(triangleCount):
        sgMaterialIds.SetItem(triangleIndex, materialId)
    
    # Return created cube geometry data. 
    return sgGeometryData

def RunExample(sg: Simplygon.ISimplygon):
    # Create a Simplygon scene. 
    sgScene = sg.CreateScene()
    
    # Get material table from the scene. 
    sgMaterialTable = sgScene.GetMaterialTable()
    
    # Create a red diffuse material and a red specular material. 
    sgRedColorNode = sg.CreateShadingColorNode()
    sgRedColorNode.SetColor(0.5, 0.0, 0.0, 0.0)
    sgDiffuseRedMaterial = sg.CreateMaterial()
    sgDiffuseRedMaterial.SetName("red_diffuse")
    sgDiffuseRedMaterial.AddMaterialChannel(Simplygon.SG_MATERIAL_CHANNEL_DIFFUSE)
    sgDiffuseRedMaterial.SetShadingNetwork(Simplygon.SG_MATERIAL_CHANNEL_DIFFUSE, sgRedColorNode)
    sgSpecularRedMaterial = sg.CreateMaterial()
    sgSpecularRedMaterial.SetName("red_specular")
    sgSpecularRedMaterial.AddMaterialChannel(Simplygon.SG_MATERIAL_CHANNEL_SPECULAR)
    sgSpecularRedMaterial.SetShadingNetwork(Simplygon.SG_MATERIAL_CHANNEL_SPECULAR, sgRedColorNode)
    
    # Add the materials to the material table. 
    diffuseMaterialId = sgMaterialTable.AddMaterial(sgDiffuseRedMaterial)
    specularMaterialId = sgMaterialTable.AddMaterial(sgSpecularRedMaterial)
    
    # Create two scene mesh objects. 
    sgCubeMesh1 = sg.CreateSceneMesh()
    sgCubeMesh2 = sg.CreateSceneMesh()
    
    # Set name on the scene meshes. 
    sgCubeMesh1.SetName("Cube1")
    sgCubeMesh1.SetOriginalName("Cube1")
    sgCubeMesh2.SetName("Cube2")
    sgCubeMesh2.SetOriginalName("Cube2")
    
    # Create cube geometry. 
    sgGeometryDataCube1 = CreateCube(sg, diffuseMaterialId)
    sgGeometryDataCube2 = CreateCube(sg, specularMaterialId)
    sgCubeMesh1.SetGeometry(sgGeometryDataCube1)
    sgCubeMesh2.SetGeometry(sgGeometryDataCube2)
    
    # Add the two scene meshes as child to the root node of the scene. 
    sgScene.GetRootNode().AddChild(sgCubeMesh1)

    sgScene.GetRootNode().AddChild(sgCubeMesh2)

    
    # Create a transform node. 
    sgTransform = sg.CreateTransform3()
    
    # Set the transform to use premultiply. 
    sgTransform.PreMultiply()
    
    # Add 45 degree rotation and 5 units translation. 
    sgTransform.AddRotation(0.785, 0.0, 1.0, 0.0)
    sgTransform.AddRotation(0.785, 1.0, 0.0, 0.0)
    sgTransform.AddTranslation(0.0, 5.0, 0.0)
    
    # Apply transformation on the second cube node. 
    sgTransformMatrix = sgTransform.GetMatrix()
    sgCubeMesh2.GetRelativeTransform().DeepCopy(sgTransformMatrix)

    
    # Save example scene to output.obj.     
    print("Save example scene to output.obj.")
    SaveScene(sg, sgScene, "output.obj")
    
    # Check log for any warnings or errors.     
    print("Check log for any warnings or errors.")
    CheckLog(sg)

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

    RunExample(sg)

    sg = None
    gc.collect()