This example shows how to use the Reduction pipeline with normal calculation settings.
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
#include <string>
#include <stdlib.h>
#include <filesystem>
#include <future>
#include "SimplygonLoader.h"
void RunReduction(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 reduction pipeline.
Simplygon::spReductionPipeline sgReductionPipeline = sg->CreateReductionPipeline();
Simplygon::spReductionSettings sgReductionSettings = sgReductionPipeline->GetReductionSettings();
Simplygon::spNormalCalculationSettings sgNormalCalculationSettings = sgReductionPipeline->GetNormalCalculationSettings();
// Set reduction target to triangle ratio with a ratio of 50%.
sgReductionSettings->SetReductionTargets( Simplygon::EStopCondition::All, true, false, false, false );
sgReductionSettings->SetReductionTargetTriangleRatio( 0.5f );
// The angle in degrees determing the normal smoothness.
sgNormalCalculationSettings->SetHardEdgeAngle( 75 );
// Reorthogonalize the tangentspace after the reduction.
sgNormalCalculationSettings->SetReorthogonalizeTangentSpace( true );
// Repair invalid normals.
sgNormalCalculationSettings->SetRepairInvalidNormals( true );
// Don't generate new normals. However invalid normals will still be repaired.
sgNormalCalculationSettings->SetReplaceNormals( false );
// Don't generate new tangents and bitangents.
sgNormalCalculationSettings->SetReplaceTangents( false );
// Scale the vertex normal based on the triangle area.
sgNormalCalculationSettings->SetScaleByAngle( false );
sgNormalCalculationSettings->SetScaleByArea( true );
// Don't snap the normal to flat surfaces.
sgNormalCalculationSettings->SetSnapNormalsToFlatSurfaces( false );
// Start the reduction pipeline.
sgReductionPipeline->RunScene(sgScene, Simplygon::EPipelineRunMode::RunInThisProcess);
// Get the processed scene.
Simplygon::spScene sgProcessedScene = sgReductionPipeline->GetProcessedScene();
Simplygon::spSceneExporter sgSceneExporter = sg->CreateSceneExporter();
sgSceneExporter->SetScene(sgProcessedScene);
sgSceneExporter->SetExportFilePath( "ReductionOutput.fbx" );
if(!sgSceneExporter->RunExport())
throw std::exception("Failed to save ReductionOutput.fbx.");
}
int main()
{
Simplygon::ISimplygon* sg = NULL;
Simplygon::EErrorCodes initval = Simplygon::Initialize( &sg );
if( initval != Simplygon::EErrorCodes::NoError )
{
return int(initval);
}
RunReduction(sg);
Simplygon::Deinitialize(sg);
return 0;
}