mattercontrol/TextCreator/CardHolderTool/MeshObjects.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Threading;
using MatterHackers.Agg;
using MatterHackers.Agg.Font;
using MatterHackers.Agg.Platform;
using MatterHackers.Agg.VertexSource;
using MatterHackers.DataConverters3D;
using MatterHackers.MatterControl.MatterCad;
using MatterHackers.MatterControl.PartPreviewWindow.View3D;
using MatterHackers.PolygonMesh;
using MatterHackers.RenderOpenGl;
using MatterHackers.VectorMath;

namespace MatterHackers.MatterControl.MeshObjects
{
	public enum Alignment { X, Y, Z, negX, negY, negZ };

	[Flags]
	public enum Face
	{
		Left = 0x01,
		Right = 0x02,
		Front = 0x04,
		Back = 0x08,
		Bottom = 0x10,
		Top = 0x20,
	};

	[Flags]
	public enum Edge
	{
		LeftFront = Face.Left | Face.Front,
		LeftBack = Face.Left | Face.Back,
		LeftBottom = Face.Left | Face.Bottom,
		LeftTop = Face.Left | Face.Top,
		RightFront = Face.Right | Face.Front,
		RightBack = Face.Right | Face.Back,
		RightBottom = Face.Right | Face.Bottom,
		RightTop = Face.Right | Face.Top,
		FrontBottom = Face.Front | Face.Bottom,
		FrontTop = Face.Front | Face.Top,
		BackBottom = Face.Back | Face.Bottom,
		BackTop = Face.Back | Face.Top
	}

	public class BadSubtract : MatterCadObject3D
	{
		public BadSubtract()
		{
			RebuildMeshes();
		}

		public double Sides { get; set; } = 4;

		public override void RebuildMeshes()
		{
			int sides = 3;
			IObject3D keep = new Cylinder(20, 20, sides);
			IObject3D subtract = new Cylinder(10, 21, sides);
			subtract = new SetCenter(subtract, keep.GetCenter());
			IObject3D result = keep.Minus(subtract);
			this.SetChildren(result);
		}
	}

	public class SetCenter : Object3D
	{
		public SetCenter()
		{
		}

		public SetCenter(IObject3D item, Vector3 position)
		{
			Matrix *= Matrix4X4.CreateTranslation(position - item.GetCenter());
			Children.Add(item.Clone());
		}

		public SetCenter(IObject3D item, double x, double y, double z)
			: this(item, new Vector3(x, y, z))
		{
		}

		public SetCenter(IObject3D item, Vector3 offset, bool onX = true, bool onY = true, bool onZ = true)
		{
			var center = item.GetAxisAlignedBoundingBox(Matrix4X4.Identity).Center;

			Vector3 consideredOffset = Vector3.Zero; // zero out anything we don't want
			if (onX)
			{
				consideredOffset.X = offset.X - center.X;
			}
			if (onY)
			{
				consideredOffset.Y = offset.Y - center.Y;
			}
			if (onZ)
			{
				consideredOffset.Z = offset.Z - center.Z;
			}

			Matrix *= Matrix4X4.CreateTranslation(consideredOffset);
			Children.Add(item.Clone());
		}
	}

	public class Cylinder : Object3D
	{
		public Cylinder()
		{
		}

		public Cylinder(double radius, double height, int sides, Alignment alignment = Alignment.Z)
			: this(radius, radius, height, sides, alignment)
		{
		}

		public Cylinder(double radiusBottom, double radiusTop, double height, int sides, Alignment alignment = Alignment.Z)
		{
			var path = new VertexStorage();
			path.MoveTo(0, -height/2);
			path.LineTo(radiusBottom, -height/2);
			path.LineTo(radiusTop, height/2);
			path.LineTo(0, height/2);

			Mesh = VertexSourceToMesh.Revolve(path, sides);
			switch (alignment)
			{
				case Alignment.X:
					Matrix = Matrix4X4.CreateRotationY(MathHelper.Tau / 4);
					break;
				case Alignment.Y:
					Matrix = Matrix4X4.CreateRotationX(MathHelper.Tau / 4);
					break;
				case Alignment.Z:
					// This is the natural case (how it was modled)
					break;
				case Alignment.negX:
					Matrix = Matrix4X4.CreateRotationY(-MathHelper.Tau / 4);
					break;
				case Alignment.negY:
					Matrix = Matrix4X4.CreateRotationX(-MathHelper.Tau / 4);
					break;
				case Alignment.negZ:
					Matrix = Matrix4X4.CreateRotationX(MathHelper.Tau / 2);
					break;
			}
		}
	}

	public class CardHolder : MatterCadObject3D
	{
		public CardHolder()
		{
			RebuildMeshes();
		}

		[DisplayName("Name")]
		public string NameToWrite { get; set; } = "MatterHackers";

		public override void RebuildMeshes()
		{
			IObject3D plainCardHolder = Object3D.Load("C:/Temp/CardHolder.stl");

			//TypeFace typeFace = TypeFace.LoadSVG("Viking_n.svg");

			var letterPrinter = new TypeFacePrinter(NameToWrite);//, new StyledTypeFace(typeFace, 12));

			IObject3D nameMesh = new Object3D()
			{
				Mesh = VertexSourceToMesh.Extrude(letterPrinter, 5)
			};

			AxisAlignedBoundingBox textBounds = nameMesh.GetAxisAlignedBoundingBox(Matrix4X4.Identity);
			var textArea = new Vector2(90, 20);

			// test the area that the names will go to
			// nameMesh = new Box(textArea.X, textArea.Y, 5);

			double scale = Math.Min(textArea.X / textBounds.XSize, textArea.Y / textBounds.YSize);
			nameMesh = new Scale(nameMesh, scale, scale, 1);
			nameMesh = new Align(nameMesh, Face.Bottom | Face.Front, plainCardHolder, Face.Bottom | Face.Front);
			nameMesh = new SetCenter(nameMesh, plainCardHolder.GetCenter(), true, false, false);

			nameMesh = new Rotate(nameMesh, MathHelper.DegreesToRadians(-16));
			nameMesh = new Translate(nameMesh, 0, 4, 2);

			// output two meshes for card holder and text
			this.Children.Modify(list =>
			{
				list.Clear();
				list.Add(plainCardHolder);
				list.Add(nameMesh);
			});
		}
	}

	/*

public class ChairFoot2 : MatterCadObject3D
{
	public ChairFoot()
	{
		RebuildMeshes();
	}

	[DisplayName("Angle")]
	public double AngleDegrees { get; set; } = 3;

	// these are the public variables that would be edited
	[DisplayName("Final")]
	public bool FinalPart { get; set; } = true;

	[DisplayName("Height")]
	public double HeightFromFloorToBottomOfLeg { get; set; } = 10;

	[DisplayName("Inner Size")]
	public double InnerSize { get; set; } = 20;

	[DisplayName("Reach")]
	public double InsideReach { get; set; } = 10;

	[DisplayName("Outer Size")]
	public double OuterSize { get; set; } = 22;

	public override void RebuildMeshes()
	{
		// This would be better expressed as the desired offset height (height from ground to bottom of chair leg).
		double angleRadians = MathHelper.DegreesToRadians(AngleDegrees);
		double extraHeightForRotation = Math.Sinh(angleRadians) * OuterSize; // get the distance to clip off the extra bottom
		double unclippedFootHeight = HeightFromFloorToBottomOfLeg + extraHeightForRotation;

		if (FinalPart)
		{
			Box chairFootBox = new Box(OuterSize, OuterSize, unclippedFootHeight);
			//chairFootBox.BevelEdge(Edge.LeftBack, 2);
			//chairFootBox.BevelEdge(Edge.LeftFront, 2);
			//chairFootBox.BevelEdge(Edge.RightBack, 2);
			//chairFootBox.BevelEdge(Edge.RightFront, 2);
			IObject3D chairFoot = chairFootBox;

			IObject3D ring = new Cylinder(InnerSize / 2 - 1, InsideReach, 30);
			ring -= new Cylinder(ring.XSize / 2 - 2, ring.ZSize + 1, 30);

			IObject3D fins = new Box(3, 1, ring.ZSize);
			fins = new Translate(fins, 0, 1) + new Translate(fins, 0, -1);
			fins -= new Align(new Rotate(new Box(5, 5, 5), 0, MathHelper.DegreesToRadians(45)), Face.Bottom | Face.Left, fins, Face.Top | Face.Left, 0, 0, -fins.XSize);
			fins = new Translate(fins, InnerSize / 2 - .1);

			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45));
			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45 + 90));
			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45 + 180));
			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45 - 90));

			chairFoot += new Align(ring, Face.Bottom, chairFoot, Face.Top, 0, 0, -.1);

			chairFoot = new Rotate(chairFoot, 0, angleRadians, 0);
			IObject3D clipBox = new Align(new Box(OuterSize * 2, OuterSize * 2, unclippedFootHeight), Face.Top, chairFoot, Face.Bottom, 0, 0, extraHeightForRotation);
			chairFoot -= clipBox;
			chairFoot = new Translate(chairFoot, 0, 0, clipBox.GetAxisAlignedBoundingBox().maxXYZ.Z);

			this.Mesh = CsgToMesh.Convert(chairFoot);
		}
		else // fit part
		{
			double baseHeight = 3;
			double insideHeight = 4;
			Box chairFootBox = new Box(OuterSize, OuterSize, baseHeight);
			chairFootBox.BevelEdge(Edge.LeftBack, 2);
			chairFootBox.BevelEdge(Edge.LeftFront, 2);
			chairFootBox.BevelEdge(Edge.RightBack, 2);
			chairFootBox.BevelEdge(Edge.RightFront, 2);
			IObject3D chairFoot = chairFootBox;

			IObject3D ring = new Cylinder(InnerSize / 2 - 1, insideHeight, 30);
			ring -= new Cylinder(ring.XSize / 2 - 2, ring.ZSize + 1, 30);

			IObject3D fins = new Box(3, 1, ring.ZSize);
			fins = new Translate(fins, 0, 1) + new Translate(fins, 0, -1);
			fins -= new Align(new Rotate(new Box(5, 5, 5), 0, MathHelper.DegreesToRadians(45)), Face.Bottom | Face.Left, fins, Face.Top | Face.Left, 0, 0, -fins.XSize);
			fins = new Translate(fins, InnerSize / 2 - .1);

			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45));
			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45 + 90));
			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45 + 180));
			ring += new Rotate(fins, 0, 0, MathHelper.DegreesToRadians(45 - 90));

			chairFoot += new Align(ring, Face.Bottom, chairFoot, Face.Top, 0, 0, -.1);

			this.Mesh = CsgToMesh.Convert(chairFoot);
		}
	}
}
*/

	public class CubePrimitive : MatterCadObject3D
	{
		public CubePrimitive()
		{
			RebuildMeshes();
		}

		public double Width { get; set; } = 20;
		public double Depth { get; set; } = 20;
		public double Height { get; set; } = 20;

		public override void RebuildMeshes()
		{
			var aabb = AxisAlignedBoundingBox.Zero;
			if (Mesh != null)
			{
				this.GetAxisAlignedBoundingBox();
			}
			Mesh = PlatonicSolids.CreateCube(Width, Depth, Height);
			Mesh.CleanAndMergMesh(CancellationToken.None);
			PlatingHelper.PlaceMeshAtHeight(this, aabb.minXYZ.Z);
		}
	}

	public class CylinderPrimitive : MatterCadObject3D
	{
		public CylinderPrimitive()
		{
			RebuildMeshes();
		}

		public double Diameter { get; set; } = 20;
		public double Height { get; set; } = 20;
		public int Sides { get; set; } = 30;

		public override void RebuildMeshes()
		{
			var aabb = AxisAlignedBoundingBox.Zero;
			if (Mesh != null)
			{
				this.GetAxisAlignedBoundingBox();
			}
			var path = new VertexStorage();
			path.MoveTo(0, 0);
			path.LineTo(Diameter / 2, 0);
			path.LineTo(Diameter / 2, Height);
			path.LineTo(0, Height);

			Mesh = VertexSourceToMesh.Revolve(path, Sides);
			Mesh.CleanAndMergMesh(CancellationToken.None);
			PlatingHelper.PlaceMeshAtHeight(this, aabb.minXYZ.Z);
		}
	}

	public class ConePrimitive : MatterCadObject3D
	{
		public ConePrimitive()
		{
			RebuildMeshes();
		}

		[DisplayName("Diameter")]
		public double Diameter { get; set; } = 20;
		//[DisplayName("Top")]
		//public double TopDiameter { get; set; } = 0;
		public double Height { get; set; } = 20;
		public int Sides { get; set; } = 30;

		public override void RebuildMeshes()
		{
			var aabb = AxisAlignedBoundingBox.Zero;
			if (Mesh != null)
			{
				this.GetAxisAlignedBoundingBox();
			}
			var path = new VertexStorage();
			path.MoveTo(0, 0);
			path.LineTo(Diameter / 2, 0);
			path.LineTo(0, Height);

			Mesh = VertexSourceToMesh.Revolve(path, Sides);
			Mesh.CleanAndMergMesh(CancellationToken.None);
			PlatingHelper.PlaceMeshAtHeight(this, aabb.minXYZ.Z);
		}
	}

	public class TorusPrimitive : MatterCadObject3D
	{
		public TorusPrimitive()
		{
			RebuildMeshes();
		}

		[DisplayName("Inner Diameter")]
		public double InnerDiameter { get; set; } = 10;
		[DisplayName("Outer Diameter")]
		public double OuterDiameter { get; set; } = 20;
		[DisplayName("Toroid Sides")]
		public int ToroidSides { get; set; } = 20;
		[DisplayName("Ring Sides")]
		public int PoleSides { get; set; } = 16;

		public override void RebuildMeshes()
		{
			var aabb = AxisAlignedBoundingBox.Zero;
			if (Mesh != null)
			{
				this.GetAxisAlignedBoundingBox();
			}
			var poleRadius = (OuterDiameter / 2 - InnerDiameter / 2) / 2;
			var toroidRadius = InnerDiameter / 2 + poleRadius;
			var path = new VertexStorage();
			var angleDelta = MathHelper.Tau / PoleSides;
			var angle = 0.0;
			var circleCenter = new Vector2(toroidRadius, 0);
			path.MoveTo(circleCenter + new Vector2(poleRadius * Math.Cos(angle), poleRadius * Math.Sin(angle)));
			for (int i = 0; i < PoleSides; i++)
			{
				angle += angleDelta;
				path.LineTo(circleCenter + new Vector2(poleRadius * Math.Cos(angle), poleRadius * Math.Sin(angle)));
			}

			Mesh = VertexSourceToMesh.Revolve(path, ToroidSides);
			Mesh.CleanAndMergMesh(CancellationToken.None);
			PlatingHelper.PlaceMeshAtHeight(this, aabb.minXYZ.Z);
		}
	}
	public class SpherePrimitive : MatterCadObject3D
	{
		public SpherePrimitive()
		{
			RebuildMeshes();
		}

		public double Diameter { get; set; } = 20;
		[DisplayName("Longitude Sides")]
		public int LongitudeSides { get; set; } = 30;
		[DisplayName("Latitude Sides")]
		public int LatitudeSides { get; set; } = 20;

		public override void RebuildMeshes()
		{
			var aabb = AxisAlignedBoundingBox.Zero;
			if (Mesh != null)
			{
				this.GetAxisAlignedBoundingBox();
			}
			var path = new VertexStorage();
			var angleDelta = MathHelper.Tau / 2 / LatitudeSides;
			var angle = -MathHelper.Tau / 4;
			var radius = Diameter / 2;
			path.MoveTo(new Vector2(radius * Math.Cos(angle), radius * Math.Sin(angle)));
			for (int i = 0; i < LatitudeSides; i++)
			{
				angle += angleDelta;
				path.LineTo(new Vector2(radius * Math.Cos(angle), radius * Math.Sin(angle)));
			}

			Mesh = VertexSourceToMesh.Revolve(path, LongitudeSides);
			PlatingHelper.PlaceMeshAtHeight(this, aabb.minXYZ.Z);
		}
	}

	public class CurveTest : MatterCadObject3D
	{
		private PolygonMesh.Mesh inputMesh;

		private PolygonMesh.Mesh transformedMesh;

		public CurveTest()
		{
			var letterPrinter = new TypeFacePrinter("MatterHackers");
			inputMesh = VertexSourceToMesh.Extrude(letterPrinter, 5);
			transformedMesh = PolygonMesh.Mesh.Copy(inputMesh, CancellationToken.None);

			RebuildMeshes();
		}

		[DisplayName("Angle")]
		public double AngleDegrees { get; set; } = 0;

		[DisplayName("Bend Up")]
		public bool BendCW { get; set; } = true;

		public override void RebuildMeshes()
		{
			if (AngleDegrees > 0)
			{
				var aabb = inputMesh.GetAxisAlignedBoundingBox();

				// find the radius that will make the x-size sweep out the requested angle
				// c = Tr ; r = c/T
				var angleRadians = MathHelper.DegreesToRadians(AngleDegrees);
				var circumference = aabb.XSize * MathHelper.Tau / angleRadians;
				var radius = circumference / MathHelper.Tau;

				var rotateXyPos = new Vector2(aabb.minXYZ.X, BendCW ? aabb.maxXYZ.Y : aabb.minXYZ.Y);
				if (!BendCW)
				{
					angleRadians = -angleRadians;
				}

				for (int i = 0; i < transformedMesh.Vertices.Count; i++)
				{
					var pos = inputMesh.Vertices[i].Position;
					var pos2D = new Vector2(pos);
					Vector2 rotateSpace = pos2D - rotateXyPos;
					var rotateRatio = rotateSpace.X / aabb.XSize;

					rotateSpace.X = 0;
					rotateSpace.Y += BendCW ? -radius : radius;
					rotateSpace.Rotate(angleRadians * rotateRatio);
					rotateSpace.Y += BendCW ? radius : -radius; ;
					rotateSpace += rotateXyPos;

					transformedMesh.Vertices[i].Position = new Vector3(rotateSpace.X, rotateSpace.Y, pos.Z);
				}
			}
			else
			{
				for (int i = 0; i < transformedMesh.Vertices.Count; i++)
				{
					transformedMesh.Vertices[i].Position = inputMesh.Vertices[i].Position;
				}
			}

			transformedMesh.MarkAsChanged();
			transformedMesh.CalculateNormals();

			this.Mesh = transformedMesh;
		}
	}

	public class PinchTest : MatterCadObject3D
	{
		private PolygonMesh.Mesh inputMesh;

		private PolygonMesh.Mesh transformedMesh;

		public PinchTest()
		{
			var letterPrinter = new TypeFacePrinter("MatterHackers");
			inputMesh = VertexSourceToMesh.Extrude(letterPrinter, 5);
			transformedMesh = PolygonMesh.Mesh.Copy(inputMesh, CancellationToken.None);

			RebuildMeshes();
		}

		[DisplayName("Back Ratio")]
		public double PinchRatio { get; set; } = 1;

		public override void RebuildMeshes()
		{
			var aabb = inputMesh.GetAxisAlignedBoundingBox();
			for (int i = 0; i < transformedMesh.Vertices.Count; i++)
			{
				var pos = inputMesh.Vertices[i].Position;

				var ratioToApply = PinchRatio;

				var distFromCenter = pos.X - aabb.Center.X;
				var distanceToPinch = distFromCenter * (1 - PinchRatio);
				var delta = (aabb.Center.X + distFromCenter * ratioToApply) - pos.X;

				// find out how much to pinch based on y position
				var amountOfRatio = (pos.Y - aabb.minXYZ.Y) / aabb.YSize;
				transformedMesh.Vertices[i].Position = new Vector3(pos.X + delta * amountOfRatio, pos.Y, pos.Z);
			}

			transformedMesh.MarkAsChanged();
			transformedMesh.CalculateNormals();

			this.Mesh = transformedMesh;
		}
	}

	public class PvcT : MatterCadObject3D
	{
		private int sides = 50;

		public PvcT()
		{
			RebuildMeshes();
		}

		[DisplayName("Inner Radius")]
		public double InnerDiameter { get; set; } = 15;

		[DisplayName("Outer Radius")]
		public double OuterDiameter { get; set; } = 20;

		public double BottomReach { get; set; } = 30;

		public double FrontReach { get; set; } = 25;

		public double TopReach { get; set; } = 30;

		public override void RebuildMeshes()
		{
			IObject3D topBottomConnect = new Cylinder(OuterDiameter / 2, OuterDiameter, sides, Alignment.Y);
			IObject3D frontConnect = new Cylinder(OuterDiameter / 2, OuterDiameter / 2, sides, Alignment.X);
			frontConnect = new Align(frontConnect, Face.Right, topBottomConnect, Face.Right);

			IObject3D bottomReach = new Rotate(CreateReach(BottomReach), -MathHelper.Tau / 4);
			bottomReach = new Align(bottomReach, Face.Back, topBottomConnect, Face.Front, 0, .1);

			IObject3D topReach = new Rotate(CreateReach(TopReach), MathHelper.Tau / 4);
			topReach = new Align(topReach, Face.Front, topBottomConnect, Face.Back, 0, -.1);

			IObject3D frontReach = new Rotate(CreateReach(FrontReach), 0, -MathHelper.Tau / 4);
			frontReach = new Align(frontReach, Face.Left, topBottomConnect, Face.Right, -.1);

			// output multiple meshes for pipe connector
			this.Children.Modify(list =>
			{
				list.Clear();
				list.Add(topBottomConnect);
				list.Add(frontConnect);
				list.Add(bottomReach);
				list.Add(topReach);
				list.Add(frontReach);
			});

			this.Color = Color.Transparent;
			this.Mesh = null;
		}

		private IObject3D CreateReach(double reach)
		{
			var finWidth = 4.0;
			var finLength = InnerDiameter;

			var pattern = new VertexStorage();
			pattern.MoveTo(0, 0);
			pattern.LineTo(finLength/2, 0);
			pattern.LineTo(finLength/2, reach - finLength / 8);
			pattern.LineTo(finLength/2 - finLength / 8, reach);
			pattern.LineTo(-finLength/2 + finLength / 8, reach);
			pattern.LineTo(-finLength/2, reach - finLength / 8);
			pattern.LineTo(-finLength/2, 0);

			var fin1 = new Object3D()
			{
				Mesh = VertexSourceToMesh.Extrude(pattern, finWidth)
			};
			fin1 = new Translate(fin1, 0, 0, -finWidth / 2);
			//fin1.ChamferEdge(Face.Top | Face.Back, finLength / 8);
			//fin1.ChamferEdge(Face.Top | Face.Front, finLength / 8);
			fin1 = new Rotate(fin1, -MathHelper.Tau / 4);
			var fin2 = new SetCenter(new Rotate(fin1, 0, 0, MathHelper.Tau / 4), fin1.GetCenter());

			return new Object3D().SetChildren(new List<IObject3D>() { fin1, fin2 });
		}
	}

	public class RibonWithName : MatterCadObject3D
	{
		private static TypeFace typeFace = null;

		public RibonWithName()
		{
			RebuildMeshes();
		}

		[DisplayName("Name")]
		public string NameToWrite { get; set; } = "MatterHackers";

		public override void RebuildMeshes()
		{
			IObject3D cancerRibonStl = Object3D.Load("Cancer_Ribbon.stl", CancellationToken.None);

			cancerRibonStl = new Rotate(cancerRibonStl, MathHelper.DegreesToRadians(90));

			if (typeFace == null)
			{
				typeFace = TypeFace.LoadFrom(AggContext.StaticData.ReadAllText(Path.Combine("Fonts", "TitilliumWeb-Black.svg")));
			}

			var letterPrinter = new TypeFacePrinter(NameToWrite.ToUpper(), new StyledTypeFace(typeFace, 12));

			IObject3D nameMesh = new Object3D()
			{
				Mesh = VertexSourceToMesh.Extrude(letterPrinter, 5)
			};

			AxisAlignedBoundingBox textBounds = nameMesh.GetAxisAlignedBoundingBox();
			var textArea = new Vector2(25, 6);

			double scale = Math.Min(textArea.X / textBounds.XSize, textArea.Y / textBounds.YSize);
			nameMesh = new Scale(nameMesh, scale, scale, 2 / textBounds.ZSize);
			nameMesh = new Align(nameMesh, Face.Bottom | Face.Front, cancerRibonStl, Face.Top | Face.Front, 0, 0, -1);
			nameMesh = new SetCenter(nameMesh, cancerRibonStl.GetCenter(), true, false, false);

			nameMesh = new Rotate(nameMesh, 0, 0, MathHelper.DegreesToRadians(50));
			nameMesh = new Translate(nameMesh, -37, -14, -1);

			// output two meshes for card holder and text
			this.Children.Modify(list =>
			{
				list.Clear();
				list.Add(cancerRibonStl);
				list.Add(nameMesh);
			});

			this.Mesh = null;
		}
	}

	public class Box : Object3D
	{
		public Box(double x, double y, double z)
		{
			Mesh = PlatonicSolids.CreateCube(x, y, z);
			Mesh.CleanAndMergMesh(CancellationToken.None);
		}
	}

	public static class Object3DExtensions
	{
		public static IObject3D Translate(this IObject3D objectToTranslate, double x = 0, double y = 0, double z = 0, string name = "")
		{
			return objectToTranslate.Translate(new Vector3(x, y, z), name);
		}

		public static IObject3D Translate(this IObject3D objectToTranslate, Vector3 translation, string name = "")
		{
			objectToTranslate.Matrix *= Matrix4X4.CreateTranslation(translation);
			return objectToTranslate;
		}

		public static IObject3D Minus(this IObject3D a, IObject3D b)
		{
			var resultsA = a.Clone();
			SubtractEditor.Subtract(resultsA.VisibleMeshes().ToList(), b.VisibleMeshes().ToList());
			return resultsA;
		}

		public static Vector3 GetCenter(this IObject3D item)
		{
			return item.GetAxisAlignedBoundingBox(Matrix4X4.Identity).Center;
		}

		public static IObject3D SetChildren(this IObject3D parent, IEnumerable<IObject3D> newChildren)
		{
			parent.Children.Modify((list) =>
			{
				list.Clear();
				list.AddRange(newChildren);
			});

			return parent;
		}

		public static void SetChildren(this IObject3D parent, IObject3D newChild)
		{
			parent.Children.Modify((list) =>
			{
				list.Clear();
				list.Add(newChild);
			});
		}
	}

	public class Translate : Object3D
	{
		public Translate()
		{ }

		public Translate(IObject3D item, double x = 0, double y = 0, double z = 0)
			: this(item, new Vector3(x, y, z))
		{
		}

		public Translate(IObject3D item, Vector3 translation)
		{
			Matrix *= Matrix4X4.CreateTranslation(translation);
			Children.Add(item.Clone());
		}
	}

	public class Align : Object3D
	{
		public Align()
		{
		}

		public Align(IObject3D objectToAlign, Face boundingFacesToAlign, IObject3D objectToAlignTo, Face boundingFacesToAlignTo, double offsetX = 0, double offsetY = 0, double offsetZ = 0, string name = "")
			: this(objectToAlign, boundingFacesToAlign, GetPositionToAlignTo(objectToAlignTo, boundingFacesToAlignTo, new Vector3(offsetX, offsetY, offsetZ)), name)
		{
			if (objectToAlign == objectToAlignTo)
			{
				throw new Exception("You cannot align an object ot itself.");
			}
		}

		public Align(IObject3D objectToAlign, Face boundingFacesToAlign, double offsetX = 0, double offsetY = 0, double offsetZ = 0, string name = "")
			: this(objectToAlign, boundingFacesToAlign, new Vector3(offsetX, offsetY, offsetZ), name)
		{
		}

		public Align(IObject3D objectToAlign, Face boundingFacesToAlign, Vector3 positionToAlignTo, double offsetX, double offsetY, double offsetZ, string name = "")
			: this(objectToAlign, boundingFacesToAlign, positionToAlignTo + new Vector3(offsetX, offsetY, offsetZ), name)
		{
		}

		public Align(IObject3D item, Face boundingFacesToAlign, Vector3 positionToAlignTo, string name = "")
		{
			AxisAlignedBoundingBox bounds = item.GetAxisAlignedBoundingBox();

			if (IsSet(boundingFacesToAlign, Face.Left, Face.Right))
			{
				positionToAlignTo.X = positionToAlignTo.X - bounds.minXYZ.X;
			}
			if (IsSet(boundingFacesToAlign, Face.Right, Face.Left))
			{
				positionToAlignTo.X = positionToAlignTo.X - bounds.minXYZ.X - (bounds.maxXYZ.X - bounds.minXYZ.X);
			}
			if (IsSet(boundingFacesToAlign, Face.Front, Face.Back))
			{
				positionToAlignTo.Y = positionToAlignTo.Y - bounds.minXYZ.Y;
			}
			if (IsSet(boundingFacesToAlign, Face.Back, Face.Front))
			{
				positionToAlignTo.Y = positionToAlignTo.Y - bounds.minXYZ.Y - (bounds.maxXYZ.Y - bounds.minXYZ.Y);
			}
			if (IsSet(boundingFacesToAlign, Face.Bottom, Face.Top))
			{
				positionToAlignTo.Z = positionToAlignTo.Z - bounds.minXYZ.Z;
			}
			if (IsSet(boundingFacesToAlign, Face.Top, Face.Bottom))
			{
				positionToAlignTo.Z = positionToAlignTo.Z - bounds.minXYZ.Z - (bounds.maxXYZ.Z - bounds.minXYZ.Z);
			}

			Matrix *= Matrix4X4.CreateTranslation(positionToAlignTo);
			Children.Add(item.Clone());
		}

		public static Vector3 GetPositionToAlignTo(IObject3D objectToAlignTo, Face boundingFacesToAlignTo, Vector3 extraOffset)
		{
			Vector3 positionToAlignTo = new Vector3();
			if (IsSet(boundingFacesToAlignTo, Face.Left, Face.Right))
			{
				positionToAlignTo.X = objectToAlignTo.GetAxisAlignedBoundingBox().minXYZ.X;
			}
			if (IsSet(boundingFacesToAlignTo, Face.Right, Face.Left))
			{
				positionToAlignTo.X = objectToAlignTo.GetAxisAlignedBoundingBox().maxXYZ.X;
			}
			if (IsSet(boundingFacesToAlignTo, Face.Front, Face.Back))
			{
				positionToAlignTo.Y = objectToAlignTo.GetAxisAlignedBoundingBox().minXYZ.Y;
			}
			if (IsSet(boundingFacesToAlignTo, Face.Back, Face.Front))
			{
				positionToAlignTo.Y = objectToAlignTo.GetAxisAlignedBoundingBox().maxXYZ.Y;
			}
			if (IsSet(boundingFacesToAlignTo, Face.Bottom, Face.Top))
			{
				positionToAlignTo.Z = objectToAlignTo.GetAxisAlignedBoundingBox().minXYZ.Z;
			}
			if (IsSet(boundingFacesToAlignTo, Face.Top, Face.Bottom))
			{
				positionToAlignTo.Z = objectToAlignTo.GetAxisAlignedBoundingBox().maxXYZ.Z;
			}
			return positionToAlignTo + extraOffset;
		}

		private static bool IsSet(Face variableToCheck, Face faceToCheckFor, Face faceToAssertNot)
		{
			if ((variableToCheck & faceToCheckFor) != 0)
			{
				if ((variableToCheck & faceToAssertNot) != 0)
				{
					throw new Exception("You cannot have both " + faceToCheckFor.ToString() + " and " + faceToAssertNot.ToString() + " set when calling Align.  The are mutually exclusive.");
				}
				return true;
			}

			return false;
		}
	}

	public class Rotate : Object3D
	{
		public Rotate()
		{
		}

		public Rotate(IObject3D item, double x = 0, double y = 0, double z = 0, string name = "")
			: this(item, new Vector3(x, y, z), name)
		{
		}

		public Rotate(IObject3D item, Vector3 translation, string name = "")
		{
			Matrix *= Matrix4X4.CreateRotation(translation);
			Children.Add(item.Clone());
		}
	}

	public class Scale : Object3D
	{
		public Scale()
		{
		}

		public Scale(IObject3D item, double x = 0, double y = 0, double z = 0, string name = "")
			: this(item, new Vector3(x, y, z), name)
		{
		}

		public Scale(IObject3D item, Vector3 translation, string name = "")
		{
			Matrix *= Matrix4X4.CreateScale(translation);
			Children.Add(item.Clone());
		}
	}

	public class TestPart : MatterCadObject3D
	{
		public TestPart()
		{
			RebuildMeshes();
		}

		public double XOffset { get; set; } = -.4;

		public override void RebuildMeshes()
		{
			IObject3D boxCombine = new Box(10, 10, 10);
			boxCombine = boxCombine.Minus(new Translate(new Box(10, 10, 10), XOffset, -3, 2));
			this.SetChildren(boxCombine);
		}
	}
}