This example shows how to use the vertex color caster.

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

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


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

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

	sgAggregationProcessor->SetScene( sgScene );

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

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

	// Generates a mapping image which is used after the aggregation to cast new materials to the new 
	// aggregated 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 aggregation process. 
	sgAggregationProcessor->RunProcessing();

	// Setup and run the vertex color material casting. 
	Simplygon::spVertexColorCaster sgDiffuseCaster = sg->CreateVertexColorCaster();
	sgDiffuseCaster->SetMappingImage( sgAggregationProcessor->GetMappingImage() );
	sgDiffuseCaster->SetSourceMaterials( sgScene->GetMaterialTable() );
	sgDiffuseCaster->SetSourceTextures( sgScene->GetTextureTable() );
	sgDiffuseCaster->SetScene( sgScene );

	Simplygon::spVertexColorCasterSettings sgDiffuseCasterSettings = sgDiffuseCaster->GetVertexColorCasterSettings();
	sgDiffuseCasterSettings->SetMaterialChannel( "Diffuse" );
	sgDiffuseCasterSettings->SetOutputColorName( "DiffuseAsVertexColor" );

	sgDiffuseCaster->RunProcessing();

	// Update scene with new casted vertex colors. 
	Simplygon::spMaterialTable sgMaterialTable = sg->CreateMaterialTable();
	Simplygon::spTextureTable sgTextureTable = sg->CreateTextureTable();
	Simplygon::spMaterial sgMaterial = sg->CreateMaterial();
	Simplygon::spShadingVertexColorNode sgDiffuseAsVertexColorShadingNode = sg->CreateShadingVertexColorNode();
	sgDiffuseAsVertexColorShadingNode->SetVertexColorSet( "DiffuseAsVertexColor" );

	sgMaterial->AddMaterialChannel( "DiffuseAsVertexColor" );
	sgMaterial->SetShadingNetwork( "DiffuseAsVertexColor", sgDiffuseAsVertexColorShadingNode );

	sgMaterialTable->AddMaterial( sgMaterial );

	sgScene->GetTextureTable()->Clear();
	sgScene->GetMaterialTable()->Clear();
	sgScene->GetTextureTable()->Copy(sgTextureTable);
	sgScene->GetMaterialTable()->Copy(sgMaterialTable);

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

}

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

	VertexColorCasting(sg);

	Simplygon::Deinitialize(sg);

	return 0;
}