This example shows how to use the Opacity caster.

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

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


Simplygon::spScene LoadScene(Simplygon::ISimplygon* sg, const char* path)
{
	// Create scene importer 
	Simplygon::spSceneImporter sgSceneImporter = sg->CreateSceneImporter();
	sgSceneImporter->SetImportFilePath(path);
	
	// Run scene importer. 
	auto importResult = sgSceneImporter->Run();
	if (Simplygon::Failed(importResult))
	{
		throw std::exception("Failed to load scene.");
	}
	Simplygon::spScene sgScene = sgSceneImporter->GetScene();
	return sgScene;
}

void SaveScene(Simplygon::ISimplygon* sg, Simplygon::spScene sgScene, const char* path)
{
	// Create scene exporter. 
	Simplygon::spSceneExporter sgSceneExporter = sg->CreateSceneExporter();
	std::string outputScenePath = std::string("output\\") + std::string("OpacityCasting") + std::string("_") + std::string(path);
	sgSceneExporter->SetExportFilePath(outputScenePath.c_str());
	sgSceneExporter->SetScene(sgScene);
	
	// Run scene exporter. 
	auto exportResult = sgSceneExporter->Run();
	if (Simplygon::Failed(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.");
	}
}

void OpacityCasting(Simplygon::ISimplygon* sg)
{
	// Load scene to process. 	
	printf("%s\n", "Load scene to process.");
	Simplygon::spScene sgScene = LoadScene(sg, "../../../Assets/Console/Console.obj");
	
	// Create the reduction processor. 
	Simplygon::spReductionProcessor sgReductionProcessor = sg->CreateReductionProcessor();
	sgReductionProcessor->SetScene( sgScene );
	Simplygon::spReductionSettings sgReductionSettings = sgReductionProcessor->GetReductionSettings();
	Simplygon::spMappingImageSettings sgMappingImageSettings = sgReductionProcessor->GetMappingImageSettings();
	
	// Set reduction target to triangle ratio with a ratio of 50%. 
	sgReductionSettings->SetReductionTargets( Simplygon::EStopCondition::All, true, false, false, false );
	sgReductionSettings->SetReductionTargetTriangleRatio( 0.5f );
	
	// Generates a mapping image which is used after the reduction to cast new materials to the new 
	// reduced object. 
	sgMappingImageSettings->SetGenerateMappingImage( true );
	sgMappingImageSettings->SetApplyNewMaterialIds( true );
	sgMappingImageSettings->SetGenerateTangents( true );
	sgMappingImageSettings->SetUseFullRetexturing( true );
	Simplygon::spMappingImageOutputMaterialSettings sgOutputMaterialSettings = sgMappingImageSettings->GetOutputMaterialSettings(0);
	
	// Setting the size of the output material for the mapping image. This will be the output size of the 
	// textures when we do material casting in a later stage. 
	sgOutputMaterialSettings->SetTextureWidth( 2048 );
	sgOutputMaterialSettings->SetTextureHeight( 2048 );
	
	// Start the reduction process. 	
	printf("%s\n", "Start the reduction process.");
	sgReductionProcessor->RunProcessing();
	
	// Setup and run the opacity material casting. 
	Simplygon::spOpacityCaster sgOpacityCaster = sg->CreateOpacityCaster();
	sgOpacityCaster->SetMappingImage( sgReductionProcessor->GetMappingImage() );
	sgOpacityCaster->SetSourceMaterials( sgScene->GetMaterialTable() );
	sgOpacityCaster->SetSourceTextures( sgScene->GetTextureTable() );
	sgOpacityCaster->SetOutputFilePath( "OpacityTexture" );

	Simplygon::spOpacityCasterSettings sgOpacityCasterSettings = sgOpacityCaster->GetOpacityCasterSettings();
	sgOpacityCasterSettings->SetMaterialChannel( "Opacity" );
	sgOpacityCasterSettings->SetOutputImageFileFormat( Simplygon::EImageOutputFormat::PNG );
	sgOpacityCasterSettings->SetOutputPixelFormat( Simplygon::EPixelFormat::R8 );

	sgOpacityCaster->RunProcessing();
	std::string opacityTextureFilePath = sgOpacityCaster->GetOutputFilePath();
	
	// Update scene with new casted texture. 
	Simplygon::spMaterialTable sgMaterialTable = sg->CreateMaterialTable();
	Simplygon::spTextureTable sgTextureTable = sg->CreateTextureTable();
	Simplygon::spMaterial sgMaterial = sg->CreateMaterial();
	Simplygon::spTexture sgOpacityTexture = sg->CreateTexture();
	sgOpacityTexture->SetName( "Opacity" );
	sgOpacityTexture->SetFilePath( opacityTextureFilePath.c_str() );
	sgTextureTable->AddTexture( sgOpacityTexture );

	Simplygon::spShadingTextureNode sgOpacityTextureShadingNode = sg->CreateShadingTextureNode();
	sgOpacityTextureShadingNode->SetTexCoordLevel( 0 );
	sgOpacityTextureShadingNode->SetTextureName( "Opacity" );

	sgMaterial->AddMaterialChannel( "Opacity" );
	sgMaterial->SetShadingNetwork( "Opacity", sgOpacityTextureShadingNode );
	sgMaterial->SetBlendMode(Simplygon::EMaterialBlendMode::Blend);

	sgMaterialTable->AddMaterial( sgMaterial );

	sgScene->GetTextureTable()->Clear();
	sgScene->GetMaterialTable()->Clear();
	sgScene->GetTextureTable()->Copy(sgTextureTable);
	sgScene->GetMaterialTable()->Copy(sgMaterialTable);
	
	// Save processed scene. 	
	printf("%s\n", "Save processed scene.");
	SaveScene(sg, sgScene, "Output.glb");
	
	// 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);
	}

	OpacityCasting(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 Simplygon.spScene LoadScene(Simplygon.ISimplygon sg, string path)
    {
        // Create scene importer 
        using Simplygon.spSceneImporter sgSceneImporter = sg.CreateSceneImporter();
        sgSceneImporter.SetImportFilePath(path);
        
        // Run scene importer. 
        var importResult = sgSceneImporter.Run();
        if (Simplygon.Simplygon.Failed(importResult))
        {
            throw new System.Exception("Failed to load scene.");
        }
        Simplygon.spScene sgScene = sgSceneImporter.GetScene();
        return sgScene;
    }
    static void SaveScene(Simplygon.ISimplygon sg, Simplygon.spScene sgScene, string path)
    {
        // Create scene exporter. 
        using Simplygon.spSceneExporter sgSceneExporter = sg.CreateSceneExporter();
        string outputScenePath = string.Join("", new string[] { "output\\", "OpacityCasting", "_", path });
        sgSceneExporter.SetExportFilePath(outputScenePath);
        sgSceneExporter.SetScene(sgScene);
        
        // Run scene exporter. 
        var exportResult = sgSceneExporter.Run();
        if (Simplygon.Simplygon.Failed(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 void OpacityCasting(Simplygon.ISimplygon sg)
    {
        // Load scene to process.         
        Console.WriteLine("Load scene to process.");
        Simplygon.spScene sgScene = LoadScene(sg, "../../../Assets/Console/Console.obj");
        
        // Create the reduction processor. 
        using Simplygon.spReductionProcessor sgReductionProcessor = sg.CreateReductionProcessor();
        sgReductionProcessor.SetScene( sgScene );
        using Simplygon.spReductionSettings sgReductionSettings = sgReductionProcessor.GetReductionSettings();
        using Simplygon.spMappingImageSettings sgMappingImageSettings = sgReductionProcessor.GetMappingImageSettings();
        
        // Set reduction target to triangle ratio with a ratio of 50%. 
        sgReductionSettings.SetReductionTargets( Simplygon.EStopCondition.All, true, false, false, false );
        sgReductionSettings.SetReductionTargetTriangleRatio( 0.5f );
        
        // Generates a mapping image which is used after the reduction to cast new materials to the new 
        // reduced object. 
        sgMappingImageSettings.SetGenerateMappingImage( true );
        sgMappingImageSettings.SetApplyNewMaterialIds( true );
        sgMappingImageSettings.SetGenerateTangents( true );
        sgMappingImageSettings.SetUseFullRetexturing( true );
        using Simplygon.spMappingImageOutputMaterialSettings sgOutputMaterialSettings = sgMappingImageSettings.GetOutputMaterialSettings(0);
        
        // Setting the size of the output material for the mapping image. This will be the output size of the 
        // textures when we do material casting in a later stage. 
        sgOutputMaterialSettings.SetTextureWidth( 2048 );
        sgOutputMaterialSettings.SetTextureHeight( 2048 );
        
        // Start the reduction process.         
        Console.WriteLine("Start the reduction process.");
        sgReductionProcessor.RunProcessing();
        
        // Setup and run the opacity material casting. 
        string opacityTextureFilePath;
        using Simplygon.spOpacityCaster sgOpacityCaster = sg.CreateOpacityCaster();
        sgOpacityCaster.SetMappingImage( sgReductionProcessor.GetMappingImage() );
        sgOpacityCaster.SetSourceMaterials( sgScene.GetMaterialTable() );
        sgOpacityCaster.SetSourceTextures( sgScene.GetTextureTable() );
        sgOpacityCaster.SetOutputFilePath( "OpacityTexture" );

        using Simplygon.spOpacityCasterSettings sgOpacityCasterSettings = sgOpacityCaster.GetOpacityCasterSettings();
        sgOpacityCasterSettings.SetMaterialChannel( "Opacity" );
        sgOpacityCasterSettings.SetOutputImageFileFormat( Simplygon.EImageOutputFormat.PNG );
        sgOpacityCasterSettings.SetOutputPixelFormat( Simplygon.EPixelFormat.R8 );

        sgOpacityCaster.RunProcessing();
        opacityTextureFilePath = sgOpacityCaster.GetOutputFilePath();
        
        // Update scene with new casted texture. 
        using Simplygon.spMaterialTable sgMaterialTable = sg.CreateMaterialTable();
        using Simplygon.spTextureTable sgTextureTable = sg.CreateTextureTable();
        using Simplygon.spMaterial sgMaterial = sg.CreateMaterial();
        using Simplygon.spTexture sgOpacityTexture = sg.CreateTexture();
        sgOpacityTexture.SetName( "Opacity" );
        sgOpacityTexture.SetFilePath( opacityTextureFilePath );
        sgTextureTable.AddTexture( sgOpacityTexture );

        using Simplygon.spShadingTextureNode sgOpacityTextureShadingNode = sg.CreateShadingTextureNode();
        sgOpacityTextureShadingNode.SetTexCoordLevel( 0 );
        sgOpacityTextureShadingNode.SetTextureName( "Opacity" );

        sgMaterial.AddMaterialChannel( "Opacity" );
        sgMaterial.SetShadingNetwork( "Opacity", sgOpacityTextureShadingNode );
        sgMaterial.SetBlendMode(Simplygon.EMaterialBlendMode.Blend);

        sgMaterialTable.AddMaterial( sgMaterial );

        sgScene.GetTextureTable().Clear();
        sgScene.GetMaterialTable().Clear();
        sgScene.GetTextureTable().Copy(sgTextureTable);
        sgScene.GetMaterialTable().Copy(sgMaterialTable);
        
        // Save processed scene.         
        Console.WriteLine("Save processed scene.");
        SaveScene(sg, sgScene, "Output.glb");
        
        // 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;
        }
        OpacityCasting(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 simplygon10 import simplygon_loader
from simplygon10 import Simplygon


def LoadScene(sg: Simplygon.ISimplygon, path: str):
    # Create scene importer 
    sgSceneImporter = sg.CreateSceneImporter()
    sgSceneImporter.SetImportFilePath(path)
    
    # Run scene importer. 
    importResult = sgSceneImporter.Run()
    if Simplygon.Failed(importResult):
        raise Exception('Failed to load scene.')
    sgScene = sgSceneImporter.GetScene()
    return sgScene

def SaveScene(sg: Simplygon.ISimplygon, sgScene: Simplygon.spScene, path: str):
    # Create scene exporter. 
    sgSceneExporter = sg.CreateSceneExporter()
    outputScenePath = ''.join(['output\\', 'OpacityCasting', '_', path])
    sgSceneExporter.SetExportFilePath(outputScenePath)
    sgSceneExporter.SetScene(sgScene)
    
    # Run scene exporter. 
    exportResult = sgSceneExporter.Run()
    if Simplygon.Failed(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 OpacityCasting(sg: Simplygon.ISimplygon):
    # Load scene to process.     
    print("Load scene to process.")
    sgScene = LoadScene(sg, '../../../Assets/Console/Console.obj')
    
    # Create the reduction processor. 
    sgReductionProcessor = sg.CreateReductionProcessor()
    sgReductionProcessor.SetScene( sgScene )
    sgReductionSettings = sgReductionProcessor.GetReductionSettings()
    sgMappingImageSettings = sgReductionProcessor.GetMappingImageSettings()
    
    # Set reduction target to triangle ratio with a ratio of 50%. 
    sgReductionSettings.SetReductionTargets( Simplygon.EStopCondition_All, True, False, False, False )
    sgReductionSettings.SetReductionTargetTriangleRatio( 0.5 )
    
    # Generates a mapping image which is used after the reduction to cast new materials to the new 
    # reduced object. 
    sgMappingImageSettings.SetGenerateMappingImage( True )
    sgMappingImageSettings.SetApplyNewMaterialIds( True )
    sgMappingImageSettings.SetGenerateTangents( True )
    sgMappingImageSettings.SetUseFullRetexturing( True )
    sgOutputMaterialSettings = sgMappingImageSettings.GetOutputMaterialSettings(0)
    
    # Setting the size of the output material for the mapping image. This will be the output size of the 
    # textures when we do material casting in a later stage. 
    sgOutputMaterialSettings.SetTextureWidth( 2048 )
    sgOutputMaterialSettings.SetTextureHeight( 2048 )
    
    # Start the reduction process.     
    print("Start the reduction process.")
    sgReductionProcessor.RunProcessing()
    
    # Setup and run the opacity material casting. 
    sgOpacityCaster = sg.CreateOpacityCaster()
    sgOpacityCaster.SetMappingImage( sgReductionProcessor.GetMappingImage() )
    sgOpacityCaster.SetSourceMaterials( sgScene.GetMaterialTable() )
    sgOpacityCaster.SetSourceTextures( sgScene.GetTextureTable() )
    sgOpacityCaster.SetOutputFilePath( 'OpacityTexture' )

    sgOpacityCasterSettings = sgOpacityCaster.GetOpacityCasterSettings()
    sgOpacityCasterSettings.SetMaterialChannel( 'Opacity' )
    sgOpacityCasterSettings.SetOutputImageFileFormat( Simplygon.EImageOutputFormat_PNG )
    sgOpacityCasterSettings.SetOutputPixelFormat( Simplygon.EPixelFormat_R8 )

    sgOpacityCaster.RunProcessing()
    opacityTextureFilePath = sgOpacityCaster.GetOutputFilePath()
    
    # Update scene with new casted texture. 
    sgMaterialTable = sg.CreateMaterialTable()
    sgTextureTable = sg.CreateTextureTable()
    sgMaterial = sg.CreateMaterial()
    sgOpacityTexture = sg.CreateTexture()
    sgOpacityTexture.SetName( 'Opacity' )
    sgOpacityTexture.SetFilePath( opacityTextureFilePath )
    sgTextureTable.AddTexture( sgOpacityTexture )

    sgOpacityTextureShadingNode = sg.CreateShadingTextureNode()
    sgOpacityTextureShadingNode.SetTexCoordLevel( 0 )
    sgOpacityTextureShadingNode.SetTextureName( 'Opacity' )

    sgMaterial.AddMaterialChannel( 'Opacity' )
    sgMaterial.SetShadingNetwork( 'Opacity', sgOpacityTextureShadingNode )
    sgMaterial.SetBlendMode(Simplygon.EMaterialBlendMode_Blend);

    sgMaterialTable.AddMaterial( sgMaterial )

    sgScene.GetTextureTable().Clear()
    sgScene.GetMaterialTable().Clear()
    sgScene.GetTextureTable().Copy(sgTextureTable)
    sgScene.GetMaterialTable().Copy(sgMaterialTable)
    
    # Save processed scene.     
    print("Save processed scene.")
    SaveScene(sg, sgScene, 'Output.glb')
    
    # 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())

        OpacityCasting(sg)

        sg = None
        gc.collect()