This example shows how to use the Billboard cloud vegetation pipeline
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
#include <string>
#include <stdlib.h>
#include <filesystem>
#include <future>
#include "SimplygonLoader.h"
void RunBillboardCloudVegetationPipeline(Simplygon::ISimplygon* sg)
{
Simplygon::spSceneImporter sgSceneImporter = sg->CreateSceneImporter();
sgSceneImporter->SetImportFilePath( "../Assets/Tree/Tree.obj" );
if(!sgSceneImporter->RunImport())
throw std::exception("Failed to load Tree/Tree.obj.");
Simplygon::spScene sgScene = sgSceneImporter->GetScene();
// For all materials in the scene set the blend mode to blend (instead of opaque)
int materialCount = (int)sgScene->GetMaterialTable()->GetMaterialsCount();
for (int i = 0; i < materialCount; ++i)
{
sgScene->GetMaterialTable()->GetMaterial(i)->SetBlendMode(Simplygon::EMaterialBlendMode::Blend);
}
// Create the Impostor processor.
Simplygon::spBillboardCloudVegetationPipeline sgBillboardCloudVegetationPipeline = sg->CreateBillboardCloudVegetationPipeline();
Simplygon::spBillboardCloudSettings sgBillboardCloudSettings = sgBillboardCloudVegetationPipeline->GetBillboardCloudSettings();
Simplygon::spMappingImageSettings sgMappingImageSettings = sgBillboardCloudVegetationPipeline->GetMappingImageSettings();
// Set billboard cloud mode to Foliage.
sgBillboardCloudSettings->SetBillboardMode( Simplygon::EBillboardMode::Foliage );
sgBillboardCloudSettings->SetBillboardDensity( 0.5f );
sgBillboardCloudSettings->SetGeometricComplexity( 0.9f );
sgBillboardCloudSettings->SetMaxPlaneCount( 10 );
sgBillboardCloudSettings->SetTwoSided( true );
Simplygon::spFoliageSettings sgFoliageSettings = sgBillboardCloudSettings->GetFoliageSettings();
// Set the parameters for separating foliage and trunk.
sgFoliageSettings->SetSeparateTrunkAndFoliage( true );
sgFoliageSettings->SetSeparateFoliageTriangleRatio( 0.5f );
sgFoliageSettings->SetSeparateFoliageTriangleThreshold( 10 );
sgFoliageSettings->SetSeparateFoliageAreaThreshold( 0.1f );
sgFoliageSettings->SetSeparateFoliageSizeThreshold( 0.1f );
sgFoliageSettings->SetTrunkReductionRatio( 0.5f );
sgMappingImageSettings->SetMaximumLayers( 10 );
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( 1024 );
sgOutputMaterialSettings->SetTextureHeight( 1024 );
sgOutputMaterialSettings->SetMultisamplingLevel( 2 );
// Add diffuse material caster to pipeline.
Simplygon::spColorCaster sgDiffuseCaster = sg->CreateColorCaster();
Simplygon::spColorCasterSettings sgDiffuseCasterSettings = sgDiffuseCaster->GetColorCasterSettings();
sgDiffuseCasterSettings->SetMaterialChannel( "Diffuse" );
sgDiffuseCasterSettings->SetOutputImageFileFormat( Simplygon::EImageOutputFormat::PNG );
sgDiffuseCasterSettings->SetBakeOpacityInAlpha( false );
sgDiffuseCasterSettings->SetOutputPixelFormat( Simplygon::EPixelFormat::R8G8B8 );
sgDiffuseCasterSettings->SetDilation( 10 );
sgDiffuseCasterSettings->SetFillMode( Simplygon::EAtlasFillMode::Interpolate );
sgBillboardCloudVegetationPipeline->AddMaterialCaster( sgDiffuseCaster, 0 );
// Add specular material caster to pipeline.
Simplygon::spColorCaster sgSpecularCaster = sg->CreateColorCaster();
Simplygon::spColorCasterSettings sgSpecularCasterSettings = sgSpecularCaster->GetColorCasterSettings();
sgSpecularCasterSettings->SetMaterialChannel( "Specular" );
sgSpecularCasterSettings->SetOutputImageFileFormat( Simplygon::EImageOutputFormat::PNG );
sgSpecularCasterSettings->SetDilation( 10 );
sgSpecularCasterSettings->SetFillMode( Simplygon::EAtlasFillMode::Interpolate );
sgBillboardCloudVegetationPipeline->AddMaterialCaster( sgSpecularCaster, 0 );
// Add normals material caster to pipeline.
Simplygon::spNormalCaster sgNormalsCaster = sg->CreateNormalCaster();
Simplygon::spNormalCasterSettings sgNormalsCasterSettings = sgNormalsCaster->GetNormalCasterSettings();
sgNormalsCasterSettings->SetMaterialChannel( "Normals" );
sgNormalsCasterSettings->SetGenerateTangentSpaceNormals( true );
sgNormalsCasterSettings->SetOutputImageFileFormat( Simplygon::EImageOutputFormat::PNG );
sgNormalsCasterSettings->SetDilation( 10 );
sgNormalsCasterSettings->SetFillMode( Simplygon::EAtlasFillMode::Interpolate );
sgBillboardCloudVegetationPipeline->AddMaterialCaster( sgNormalsCaster, 0 );
// Setup and run the opacity material casting. Make sure the there is no dilation or fill.
Simplygon::spOpacityCaster sgOpacityCaster = sg->CreateOpacityCaster();
Simplygon::spOpacityCasterSettings sgOpacityCasterSettings = sgOpacityCaster->GetOpacityCasterSettings();
sgOpacityCasterSettings->SetMaterialChannel( "Opacity" );
sgOpacityCasterSettings->SetOutputImageFileFormat( Simplygon::EImageOutputFormat::PNG );
sgOpacityCasterSettings->SetFillMode( Simplygon::EAtlasFillMode::NoFill );
sgOpacityCasterSettings->SetOutputPixelFormat( Simplygon::EPixelFormat::R8 );
sgBillboardCloudVegetationPipeline->AddMaterialCaster( sgOpacityCaster, 0 );
// Start the impostor pipeline.
sgBillboardCloudVegetationPipeline->RunScene(sgScene, Simplygon::EPipelineRunMode::RunInThisProcess);
// Get the processed scene.
Simplygon::spScene sgProcessedScene = sgBillboardCloudVegetationPipeline->GetProcessedScene();
Simplygon::spSceneExporter sgSceneExporter = sg->CreateSceneExporter();
sgSceneExporter->SetScene(sgProcessedScene);
sgSceneExporter->SetExportFilePath( "FoliageOutput.obj" );
if(!sgSceneExporter->RunExport())
throw std::exception("Failed to save FoliageOutput.obj.");
}
int main()
{
Simplygon::ISimplygon* sg = NULL;
Simplygon::EErrorCodes initval = Simplygon::Initialize( &sg );
if( initval != Simplygon::EErrorCodes::NoError )
{
return int(initval);
}
RunBillboardCloudVegetationPipeline(sg);
Simplygon::Deinitialize(sg);
return 0;
}