This example shows how to use the Aggregation pipeline with a visibility camera.
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
#include <string>
#include <stdlib.h>
#include <filesystem>
#include <future>
#include "SimplygonLoader.h"
void RunAggregation(Simplygon::ISimplygon* sg)
{
Simplygon::spSceneImporter sgSceneImporter = sg->CreateSceneImporter();
sgSceneImporter->SetImportFilePath( "../Assets/ObscuredTeapot/Teapot.obj" );
if(!sgSceneImporter->RunImport())
throw std::exception("Failed to load ObscuredTeapot/Teapot.obj.");
Simplygon::spScene sgScene = sgSceneImporter->GetScene();
// Create the aggregation pipeline.
Simplygon::spAggregationPipeline sgAggregationPipeline = sg->CreateAggregationPipeline();
Simplygon::spAggregationSettings sgAggregationSettings = sgAggregationPipeline->GetAggregationSettings();
Simplygon::spVisibilitySettings sgVisibilitySettings = sgAggregationPipeline->GetVisibilitySettings();
// Merge all geometries into a single geometry.
sgAggregationSettings->SetMergeGeometries( true );
// Add a camera to the scene. We'll use this later as a visibility camera.
Simplygon::spSelectionSetTable sgSceneSelectionSetTable = sgScene->GetSelectionSetTable();
Simplygon::spSelectionSet sgCameraSelectionSet = sg->CreateSelectionSet();
sgCameraSelectionSet->SetName("Camera");
Simplygon::spSceneCamera sgCameraSceneCamera = sg->CreateSceneCamera();
sgCameraSceneCamera->SetCustomSphereCameraPath(4, 90, 180, 90);
sgScene->GetRootNode()->AddChild(sgCameraSceneCamera);
sgCameraSelectionSet->AddItem(sgCameraSceneCamera->GetNodeGUID());
sgSceneSelectionSetTable->AddSelectionSet(sgCameraSelectionSet);
// Use the camera previously added.
sgVisibilitySettings->SetCameraSelectionSetName( "Camera" );
// Enabled GPU based visibility calculations.
sgVisibilitySettings->SetComputeVisibilityMode( Simplygon::EComputeVisibilityMode::DirectX );
// Disabled conservative mode.
sgVisibilitySettings->SetConservativeMode( false );
// Remove all non visible geometry.
sgVisibilitySettings->SetCullOccludedGeometry( true );
// Skip filling nonvisible regions.
sgVisibilitySettings->SetFillNonVisibleAreaThreshold( 0.0f );
// Don't remove non occluding triangles.
sgVisibilitySettings->SetRemoveTrianglesNotOccludingOtherTriangles( false );
// Remove all back facing triangles.
sgVisibilitySettings->SetUseBackfaceCulling( true );
// Don't use visibility weights.
sgVisibilitySettings->SetUseVisibilityWeightsInReducer( false );
// Start the aggregation pipeline.
sgAggregationPipeline->RunScene(sgScene, Simplygon::EPipelineRunMode::RunInThisProcess);
// Get the processed scene.
Simplygon::spScene sgProcessedScene = sgAggregationPipeline->GetProcessedScene();
Simplygon::spSceneExporter sgSceneExporter = sg->CreateSceneExporter();
sgSceneExporter->SetScene(sgProcessedScene);
sgSceneExporter->SetExportFilePath( "AggregationOutput.fbx" );
if(!sgSceneExporter->RunExport())
throw std::exception("Failed to save AggregationOutput.fbx.");
}
void main()
{
Simplygon::ISimplygon* sg = NULL;
Simplygon::EErrorCodes initval = Simplygon::Initialize( &sg );
if( initval != Simplygon::EErrorCodes::NoError )
{
return;
}
RunAggregation(sg);
Simplygon::Deinitialize(sg);
}