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

/*
Copyright (c) 2017, 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:

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   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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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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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.Agg.VertexSource;
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
#if DEBUG
, IPropertyGridModifier
#endif
	{
		[Description("The height of the extrusion")]
		[Slider(.1, 50, Easing.EaseType.Quadratic, useSnappingGrid: true)]
		[MaxDecimalPlaces(2)]
		public DoubleOrExpression Height { get; set; } = 5;

#if DEBUG
		[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;
#endif

        public override bool CanApply => true;

        public override IVertexSource GetVertexSource()
		{
			return this.CombinedVisibleChildrenPaths();
		}

		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 eventArgs)
		{
			if ((eventArgs.InvalidateType.HasFlag(InvalidateType.Path)
					|| eventArgs.InvalidateType.HasFlag(InvalidateType.Children))
				&& eventArgs.Source != this
				&& !RebuildLocked)
			{
				await Rebuild();
			}
			else if (eventArgs.InvalidateType.HasFlag(InvalidateType.Properties)
				&& eventArgs.Source == this)
			{
				await Rebuild();
			}
			else
			{
				base.OnInvalidate(eventArgs);
			}
		}

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

			// now create a long running task to do the extrusion
			return ApplicationController.Instance.Tasks.Execute(
				"Linear Extrude".Localize(),
				null,
				(reporter, cancellationToken) =>
				{
					var vertexSource = this.GetVertexSource();
					List<(double height, double inset)> bevel = null;
#if DEBUG
					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));
						}
                    }
#endif
                    if (this.GetVertexSource() != null)
					{
						Mesh = VertexSourceToMesh.Extrude(this.GetVertexSource(), 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;
				});
		}

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