mattercontrol/MatterControlLib/DesignTools/Operations/Path/MergePathObject3D.cs

/*
Copyright (c) 2023, Lars Brubaker, John Lewin
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
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   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

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*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MatterControlLib.DesignTools.Operations.Path;
using MatterHackers.Agg.UI;
using MatterHackers.Agg.VertexSource;
using MatterHackers.DataConverters3D;
using MatterHackers.MatterControl.PartPreviewWindow;
using MatterHackers.PolygonMesh;
using MatterHackers.PolygonMesh.Processors;
using MatterHackers.VectorMath;

namespace MatterHackers.MatterControl.DesignTools.Operations
{
    public class MergePathObject3D : OperationSourceContainerObject3D, IEditorDraw, IObject3DControlsProvider, IPrimaryOperationsSpecifier, IPathProvider
    {
        private ClipperLib.ClipType clipType;
        private string operationName;

        public MergePathObject3D(string name, ClipperLib.ClipType clipType)
        {
            this.operationName = name;
            this.clipType = clipType;
            Name = name;
        }

        public void DrawEditor(Object3DControlsLayer layer, DrawEventArgs e)
        {
            this.DrawPath();
        }

        public AxisAlignedBoundingBox GetEditorWorldspaceAABB(Object3DControlsLayer layer)
        {
            return this.GetWorldspaceAabbOfDrawPath();
        }

        public override bool CanApply => true;

        public bool MeshIsSolidObject => false;

        public VertexStorage VertexStorage { get; set; }

        public override void Apply(UndoBuffer undoBuffer)
        {
            this.FlattenToPathObject(undoBuffer);
        }

        public void AddObject3DControls(Object3DControlsLayer object3DControlsLayer)
        {
            object3DControlsLayer.AddControls(ControlTypes.Standard2D);
        }

        public override Task Rebuild()
        {
            this.DebugDepth("Rebuild");

            var rebuildLocks = this.RebuilLockAll();

            return ApplicationController.Instance.Tasks.Execute(
                operationName,
                null,
                (reporter, cancellationTokenSource) =>
                {
                    try
                    {
                        Merge(reporter, cancellationTokenSource.Token);
                    }
                    catch
                    {
                    }

                    // set the mesh to show the path
                    this.Mesh = this.GetRawPath().Extrude(Constants.PathPolygonsHeight);

                    UiThread.RunOnIdle(() =>
                    {
                        rebuildLocks.Dispose();
                        this.CancelAllParentBuilding();
                        Parent?.Invalidate(new InvalidateArgs(this, InvalidateType.Children));
                    });
                    return Task.CompletedTask;
                });
        }

        private void Merge(Action<double, string> reporter, CancellationToken cancellationToken)
        {
            SourceContainer.Visible = true;
            RemoveAllButSource();

            var participants = SourceContainer.VisiblePathProviders();
            var first = participants.First();
            var firstObject3D = first as Object3D;
            if (participants.Count() < 2)
            {
                if (participants.Count() == 1)
                {
                    var newMesh = new Object3D();
                    newMesh.CopyProperties(firstObject3D, Object3DPropertyFlags.All);
                    newMesh.Mesh = firstObject3D.Mesh;
                    this.Children.Add(newMesh);
                    SourceContainer.Visible = false;
                }

                return;
            }

            var resultsVertexSource = first.GetTransformedPath(this);

            var totalOperations = participants.Count() - 1;
            double amountPerOperation = 1.0 / totalOperations;
            double ratioCompleted = 0;

            foreach (var item in participants)
            {
                IVertexSource itemPath = item.GetTransformedPath(this);
                if (item != first
                    && itemPath != null)
                {
                    var itemObject3D = item as Object3D;

                    this.CopyProperties(firstObject3D, Object3DPropertyFlags.Color);

                    resultsVertexSource = resultsVertexSource.MergePaths(itemPath, clipType);

                    ratioCompleted += amountPerOperation;
                    reporter?.Invoke(ratioCompleted, null);
                }
            }

            this.VertexStorage = new VertexStorage(resultsVertexSource);

            SourceContainer.Visible = false;
        }

        public IEnumerable<SceneOperation> GetOperations()
        {
            return PathObject3DAbstract.GetOperations(this.GetType());
        }

        public IVertexSource GetRawPath()
        {
            return VertexStorage;
        }
    }
}