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"
Simplygon::spScene LoadScene(Simplygon::ISimplygon* sg, const char* path)
{
// Create scene importer
Simplygon::spSceneImporter sgSceneImporter = sg->CreateSceneImporter();
sgSceneImporter->SetImportFilePath(path);
// Run scene importer.
bool importResult = sgSceneImporter->RunImport();
if (!importResult)
{
throw std::exception("Failed to load scene.");
}
Simplygon::spScene sgScene = sgSceneImporter->GetScene();
return sgScene;
}
void SaveScene(Simplygon::ISimplygon* sg, Simplygon::spScene sgScene, const char* path)
{
// Create scene exporter.
Simplygon::spSceneExporter sgSceneExporter = sg->CreateSceneExporter();
sgSceneExporter->SetExportFilePath(path);
sgSceneExporter->SetScene(sgScene);
// Run scene exporter.
bool exportResult = sgSceneExporter->RunExport();
if (!exportResult)
{
throw std::exception("Failed to save scene.");
}
}
void CheckLog(Simplygon::ISimplygon* sg)
{
// Check if any errors occurred.
bool hasErrors = sg->ErrorOccurred();
if (hasErrors)
{
Simplygon::spStringArray errors = sg->CreateStringArray();
sg->GetErrorMessages(errors);
auto errorCount = errors->GetItemCount();
if (errorCount > 0)
{
printf("%s\n", "Errors:");
for (auto errorIndex = 0U; errorIndex < errorCount; ++errorIndex)
{
Simplygon::spString errorString = errors->GetItem((int)errorIndex);
printf("%s\n", errorString.c_str());
}
sg->ClearErrorMessages();
}
}
else
{
printf("%s\n", "No errors.");
}
// Check if any warnings occurred.
bool hasWarnings = sg->WarningOccurred();
if (hasWarnings)
{
Simplygon::spStringArray warnings = sg->CreateStringArray();
sg->GetWarningMessages(warnings);
auto warningCount = warnings->GetItemCount();
if (warningCount > 0)
{
printf("%s\n", "Warnings:");
for (auto warningIndex = 0U; warningIndex < warningCount; ++warningIndex)
{
Simplygon::spString warningString = warnings->GetItem((int)warningIndex);
printf("%s\n", warningString.c_str());
}
sg->ClearWarningMessages();
}
}
else
{
printf("%s\n", "No warnings.");
}
}
void VertexColorCasting(Simplygon::ISimplygon* sg)
{
// Load scene to process.
printf("%s\n", "Load scene to process.");
Simplygon::spScene sgScene = LoadScene(sg, "../../../Assets/SimplygonMan/SimplygonMan.obj");
// 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.
printf("%s\n", "Start the aggregation process.");
sgAggregationProcessor->RunProcessing();
// Setup and run the vertex color material casting.
printf("%s\n", "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);
// Save processed scene.
printf("%s\n", "Save processed scene.");
SaveScene(sg, sgScene, "Output.glb");
// Check log for any warnings or errors.
printf("%s\n", "Check log for any warnings or errors.");
CheckLog(sg);
}
int main()
{
Simplygon::ISimplygon* sg = NULL;
Simplygon::EErrorCodes initval = Simplygon::Initialize( &sg );
if( initval != Simplygon::EErrorCodes::NoError )
{
printf( "Failed to initialize Simplygon: ErrorCode(%d)", (int)initval );
return int(initval);
}
VertexColorCasting(sg);
Simplygon::Deinitialize(sg);
return 0;
}