mattercontrol/MatterControlLib/DesignTools/Operations/Path/LinearExtrudeObject3D.cs

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

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*/

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Threading;
using System.Threading.Tasks;
using MatterHackers.Agg.UI;
using MatterHackers.DataConverters3D;
using MatterHackers.DataConverters3D.UndoCommands;
using MatterHackers.Localizations;
using MatterHackers.MatterControl.PartPreviewWindow;
using MatterHackers.PolygonMesh;
using MatterHackers.PolygonMesh.Processors;
using MatterHackers.VectorMath;

namespace MatterHackers.MatterControl.DesignTools.Operations
{
    public class LinearExtrudeObject3D : Object3D, IPrimaryOperationsSpecifier, IPropertyGridModifier
    {
        [Description("The height of the extrusion")]
        [Slider(.1, 50, Easing.EaseType.Quadratic, useSnappingGrid: true)]
        [MaxDecimalPlaces(2)]
        public DoubleOrExpression Height { get; set; } = 5;

        [Description("Bevel the top of the extrusion")]
        public bool BevelTop { get; set; } = false;

        [EnumDisplay(Mode = EnumDisplayAttribute.PresentationMode.Buttons)]
        public ExpandStyles Style { get; set; } = ExpandStyles.Sharp;

        [Slider(0, 20, Easing.EaseType.Quadratic, snapDistance: .1)]
        public DoubleOrExpression Radius { get; set; } = 3;

        [Slider(1, 20, Easing.EaseType.Quadratic, snapDistance: 1)]
        public IntOrExpression Segments { get; set; } = 9;

        public override bool CanApply => true;

        public override void Apply(UndoBuffer undoBuffer)
        {
            if (Mesh == null)
            {
                Cancel(undoBuffer);
            }
            else
            {
                // only keep the mesh and get rid of everything else
                using (RebuildLock())
                {
                    var meshOnlyItem = new Object3D()
                    {
                        Mesh = this.Mesh.Copy(CancellationToken.None)
                    };

                    meshOnlyItem.CopyProperties(this, Object3DPropertyFlags.All);

                    // and replace us with the children
                    undoBuffer.AddAndDo(new ReplaceCommand(new[] { this }, new[] { meshOnlyItem }));
                }

                Invalidate(InvalidateType.Children);
            }
        }

        public LinearExtrudeObject3D()
        {
            Name = "Linear Extrude".Localize();
        }

        public override async void OnInvalidate(InvalidateArgs invalidateArgs)
        {
            if ((invalidateArgs.InvalidateType.HasFlag(InvalidateType.Path)
                    || invalidateArgs.InvalidateType.HasFlag(InvalidateType.Children))
                && invalidateArgs.Source != this
                && !RebuildLocked)
            {
                await Rebuild();
            }
            else if (invalidateArgs.InvalidateType.HasFlag(InvalidateType.Properties)
                && invalidateArgs.Source == this)
            {
                await Rebuild();
            }
            else if (Expressions.NeedRebuild(this, invalidateArgs))
            {
                await Rebuild();
            }
            else
            {
                base.OnInvalidate(invalidateArgs);
            }
        }

        private (double x, double y) GetOffset(double radius, double xRatio, double yRatio)
        {
            return (radius * Math.Cos(xRatio * MathHelper.Tau / 4), radius * Math.Sin(yRatio * MathHelper.Tau / 4));
        }

        public override Task Rebuild()
        {
            this.DebugDepth("Rebuild");
            var rebuildLock = RebuildLock();

            bool valuesChanged = false;

            var height = Height.Value(this);
            var segments = Segments.ClampIfNotCalculated(this, 1, 32, ref valuesChanged);
            var aabb = this.GetAxisAlignedBoundingBox();
            var radius = Radius.ClampIfNotCalculated(this, 0, Math.Min(Math.Min(aabb.XSize, aabb.YSize) / 2, aabb.ZSize), ref valuesChanged);
            var bevelStart = height - radius;

            // now create a long running task to do the extrusion
            return ApplicationController.Instance.Tasks.Execute(
                "Linear Extrude".Localize(),
                null,
                (reporter, cancellationToken) =>
                {
                    var childPaths = this.CombinedVisibleChildrenPaths();
                    List<(double height, double inset)> bevel = null;
                    if (BevelTop)
                    {
                        bevel = new List<(double, double)>();
                        for (int i = 0; i < segments; i++)
                        {
                            (double x, double y) = GetOffset(radius, (i + 1) / (double)segments, i / (double)segments);
                            bevel.Add((bevelStart + y, -radius + x));
                        }
                    }

                    if (childPaths != null)
                    {
                        Mesh = VertexSourceToMesh.Extrude(childPaths, height, bevel, InflatePathObject3D.GetJoinType(Style));
                        if (Mesh.Vertices.Count == 0)
                        {
                            Mesh = null;
                        }
                    }
                    else
                    {
                        Mesh = null;
                    }

                    UiThread.RunOnIdle(() =>
                    {
                        rebuildLock.Dispose();
                        Invalidate(InvalidateType.DisplayValues);
                        this.CancelAllParentBuilding();
                        Parent?.Invalidate(new InvalidateArgs(this, InvalidateType.Mesh));
                    });

                    return Task.CompletedTask;
                });
        }

        public void UpdateControls(PublicPropertyChange change)
        {
            change.SetRowVisible(nameof(Radius), () => BevelTop);
            change.SetRowVisible(nameof(Segments), () => BevelTop);
            change.SetRowVisible(nameof(Style), () => BevelTop);
        }

        public IEnumerable<SceneOperation> GetOperations()
        {
            yield return SceneOperations.ById("AddBase");
        }
    }
}