// Copyright (c) Microsoft Corporation. 
// Licensed under the MIT license. 

using System;
using System.IO;
using System.Threading.Tasks;

public class Program
{
    static void RunRemeshing(Simplygon.ISimplygon sg)
    {
        using (Simplygon.spSceneImporter sgSceneImporter = sg.CreateSceneImporter())
        {
            sgSceneImporter.SetImportFilePath( "../Assets/ObscuredTeapot/ObscuredTeapot.obj" );
            if(!sgSceneImporter.RunImport())
                throw new System.Exception("Failed to load ObscuredTeapot/ObscuredTeapot.obj.");
            Simplygon.spScene sgScene = sgSceneImporter.GetScene();

            // Create the remeshing processor. 
            using (Simplygon.spRemeshingProcessor sgRemeshingProcessor = sg.CreateRemeshingProcessor())
            {
                sgRemeshingProcessor.SetScene( sgScene );

                using (Simplygon.spRemeshingSettings sgRemeshingSettings = sgRemeshingProcessor.GetRemeshingSettings())
                {
                    // Add a selection set to the scene with all nodes which should be remeshed. 
                    using (Simplygon.spSelectionSetTable sgSceneSelectionSetTable = sgScene.GetSelectionSetTable())
                    using (Simplygon.spSelectionSet sgRemeshingTargetSelectionSet = sg.CreateSelectionSet())
                    {
                        sgRemeshingTargetSelectionSet.SetName("RemeshingTarget");
                        Simplygon.spSceneNode sgRootTeapot001 = sgScene.GetNodeFromPath("Root/Teapot001");
                        if (!sgRootTeapot001.IsNull())
                            sgRemeshingTargetSelectionSet.AddItem(sgRootTeapot001.GetNodeGUID());
                        sgSceneSelectionSetTable.AddSelectionSet(sgRemeshingTargetSelectionSet);
                    }

                    // Set on-screen size target for remeshing. 
                    sgRemeshingSettings.SetOnScreenSize( 300 );

                    // Use the selection set created earlier. 
                    sgRemeshingSettings.SetProcessSelectionSetName( "RemeshingTarget" );

                }
                // Start the remeshing process. 
                sgRemeshingProcessor.RunProcessing();

                // Remove original materials and textures from the scene as the remeshed object has a new UV. 
                sgScene.GetTextureTable().Clear();
                sgScene.GetMaterialTable().Clear();

            }
            using (Simplygon.spSceneExporter sgSceneExporter = sg.CreateSceneExporter())
            {
                sgSceneExporter.SetScene(sgScene);
                sgSceneExporter.SetExportFilePath( "RemeshingOutput.fbx" );
                if(!sgSceneExporter.RunExport())
                    throw new System.Exception("Failed to save RemeshingOutput.fbx.");

            }
        }
    }
    static void Main(string[] args)
    {
        using (var sg = Simplygon.Loader.InitSimplygon(out var errorCode, out var errorMessage))
        {
            if (errorCode != Simplygon.EErrorCodes.NoError)
                return;
            RunRemeshing(sg);
        }
    }
}