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"
void OpacityCasting(Simplygon::ISimplygon* sg)
{
Simplygon::spSceneImporter sgSceneImporter = sg->CreateSceneImporter();
sgSceneImporter->SetImportFilePath( "../Assets/Console/Console.obj" );
if(!sgSceneImporter->RunImport())
throw std::exception("Failed to load Console/Console.obj.");
Simplygon::spScene sgScene = sgSceneImporter->GetScene();
// 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.
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 );
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);
}
OpacityCasting(sg);
Simplygon::Deinitialize(sg);
return 0;
}