nanoCAD forum

To move elements from Model Space to Paper Space through Viewport.

Nayara Ferreira, on 01 February 2017 - 06:26 PM, said:

RESOLVED
I created the command

using HostMgd.ApplicationServices;
using HostMgd.EditorInput;
using System;
using Teigha.DatabaseServices;
using Teigha.Geometry;
namespace COMANDOS
{
	class CHSpace
	{
		static double escala = 1;
		public static void CHSPACE()
		{
			Document document = Application.DocumentManager.MdiActiveDocument;
			Database db = HostApplicationServices.WorkingDatabase;
			Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
			try
			{

				using (Transaction tr = db.TransactionManager.StartTransaction())
				{
					Viewport acVportTblRec;
					acVportTblRec = tr.GetObject(document.Editor.ActiveViewportId,
														OpenMode.ForWrite) as Viewport;
					if (acVportTblRec == null)
					{
						tr.Commit();
						ed.WriteMessage("Não existe nenhuma Viewport ativa.");
						return;
					}

					PromptSelectionOptions promptSelectionOptions = new PromptSelectionOptions();
					promptSelectionOptions.MessageForAdding = "Selecione os objetos:";
					PromptSelectionResult prEntRes1 = document.Editor.GetSelection(promptSelectionOptions);
					if (prEntRes1.Status != PromptStatus.OK)
					{
						tr.Commit();
						return;
					}
                    Matrix3d m = MS2PS(acVportTblRec);
					foreach (SelectedObject item in prEntRes1.Value)
					{
		
						Entity ent = tr.GetObject(item.ObjectId, OpenMode.ForWrite) as Entity;
						BlockTableRecord space = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
						Entity clone = ent.Clone() as Entity;
						space.AppendEntity(clone);
						tr.AddNewlyCreatedDBObject(clone, true);
						Scale(clone.Id, m, escala);
						ent.Erase();
					}
					tr.Commit();
				}
			}
			catch (Exception ex)
			{
				ed.WriteMessage(ex.ToString());
			}
		}
		internal static Matrix3d MS2PS(Viewport vp)
		{
			Vector3d viewDirection = vp.ViewDirection;
			Point2d center = vp.ViewCenter;
			Point3d viewCenter = new Point3d(center.X, center.Y, 0);
			Point3d viewTarget = vp.ViewTarget;
			double twistAngle = -vp.TwistAngle;
			Point3d centerPoint = vp.CenterPoint;
			double viewHeight = vp.ViewHeight;
			double height = vp.Height;
			double width = vp.Width;
			double scaling = viewHeight / height;
			double lensLength = vp.LensLength;

			Vector3d zAxis = viewDirection.GetNormal();
			Vector3d xAxis = Vector3d.ZAxis.CrossProduct(viewDirection);

			Vector3d yAxis;
			if (!xAxis.IsZeroLength())
			{
				xAxis = NormalizeVector(xAxis);
				yAxis = zAxis.CrossProduct(xAxis);
				double tmp = xAxis.X;
				tmp = xAxis.Y;
				tmp = xAxis.Z;
			}
			else if (zAxis.Z < 0)
			{
				xAxis = -Vector3d.XAxis;
				yAxis = Vector3d.YAxis;
				zAxis = -Vector3d.ZAxis;
			}
			else
			{
				xAxis = Vector3d.XAxis;
				yAxis = Vector3d.YAxis;
				zAxis = Vector3d.ZAxis;
			}
			Matrix3d ps2dcs = Matrix3d.Displacement(Point3d.Origin - centerPoint);
			ps2dcs = ps2dcs * Matrix3d.Scaling(scaling, centerPoint);
			Matrix3d dcs2wcs = Matrix3d.Displacement(viewCenter - Point3d.Origin);
			Matrix3d matCoords = Matrix3d.AlignCoordinateSystem(
			Matrix3d.Identity.CoordinateSystem3d.Origin,
			Matrix3d.Identity.CoordinateSystem3d.Xaxis,
			Matrix3d.Identity.CoordinateSystem3d.Yaxis,
			Matrix3d.Identity.CoordinateSystem3d.Zaxis,
			Matrix3d.Identity.CoordinateSystem3d.Origin,
			xAxis, yAxis, zAxis);
			dcs2wcs = matCoords * dcs2wcs;
			dcs2wcs = Matrix3d.Displacement(viewTarget - Point3d.Origin) * dcs2wcs;
			dcs2wcs = Matrix3d.Rotation(twistAngle, zAxis, viewTarget) * dcs2wcs;
			Matrix3d perspMat = Matrix3d.Identity;
			if (vp.PerspectiveOn)
			{
				double viewsize = viewHeight;
				double aspectRatio = width / height;
				double adjustFactor = 1.0 / 42.0;
				double adjustedLensLength = viewsize * lensLength * Math.Sqrt(1.0 + aspectRatio * aspectRatio) * adjustFactor;
				double eyeDistance = viewDirection.Length;
				double lensDistance = eyeDistance - adjustedLensLength;
				double ed = eyeDistance;
				double ll = adjustedLensLength;
				double l = lensDistance;
				perspMat = new Matrix3d(new double[] {
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, (ll - l) / ll, l * (ed - ll) / ll,
0, 0, -1.0 / ll, ed / ll });
			}
			return ps2dcs.Inverse() * perspMat * dcs2wcs.Inverse();
		}

		internal static Vector3d NormalizeVector(Vector3d vec)
		{
			double length = Math.Sqrt((vec.X * vec.X) + (vec.Y * vec.Y) + (vec.Z * vec.Z));
			double x = vec.X / length;
			double y = vec.Y / length;
			double z = vec.Z / length;
			return new Vector3d(x, y, z);
		}
		private static void Scale(ObjectId id, Matrix3d transform, double scale)
		{
			Database db = id.Database;
			using (Transaction tr = db.TransactionManager.StartTransaction())
			{
				try
				{
					Entity ent = (Entity)tr.GetObject(id, OpenMode.ForWrite);
					if (ent != null)
					{
						ent.TransformBy(transform);
					}
					if (id.ObjectClass.DxfName.ToUpper() == "DIMENSION")
					{
						Dimension d = ent as Dimension;
						d.Dimscale = scale;
					}

				}
				catch (Teigha.Runtime.Exception)
				{
				}
				tr.Commit();
				tr.Dispose();
			}
		}
	}
}

Hello Nayara,
nanoCAD don't have the same commands, but it is in the wishlist.
Probably, we will release it.