“Truth in wine” or try programming NanoCAD under Linux (MultiCAD.NET API)

• Scarless Face or First Steps in Multicad.NET API 7 (for Nanocad 8.1)
• “Like a ram on a new gate” or custom “pseudo-3D” objects in NanoCAD using the MultiCAD.NET API
• “I am watching you” or how to make SCADA from CADa (MultiCAD.NET API)

// Version 1.1 //Use Microsoft .NET Framework 3.5 and old version of MultiCad.NET (for NC 5.1) //Class for demonstrating the capabilities of MultiCad.NET //Assembly for the Nanocad 5.1 //Link mapimgd.dll from Nanocad SDK //Link System.Windows.Forms and System.Drawing //upd: for version 1.1 also link .NET API: hostdbmg.dll, hostmgd.dll //The commands: draws a pseudo 3D door. //This code in the part of non-infringing rights Nanosoft can be used and distributed in any accessible ways. //For the consequences of the code application, the developer is not responsible. // V 1.0. More detailed - https://habrahabr.ru/post/342680/ // V 1.1. More detailed - https://habrahabr.ru/post/343772/ // PS A big thanks to Alexander Vologodsky for help in developing a method for pivoting object. using System; using System.ComponentModel; using System.Windows.Forms; using Multicad.Runtime; using Multicad.DatabaseServices; using Multicad.Geometry; using Multicad.CustomObjectBase; using Multicad; //added in V 1.1. for monitoring using System.Security.Permissions; using System.IO; using Multicad.AplicationServices; using HostMgd.ApplicationServices; using HostMgd.EditorInput; namespace nanodoor2 { //change "8b0986c0-4163-42a4-b005-187111b499d7" for your Guid from Assembly. // Be careful GUID for door and wall classes must be different! // Otherwise there will be problems with saving and moving [CustomEntity(typeof(DoorPseudo3D_nc51), "b4edac1f-7978-483f-91b1-10503d20735b", "DoorPseudo3D_nc51", "DoorPseudo3D_nc51 Sample Entity")] [Serializable] public class DoorPseudo3D_nc51 : McCustomBase { // First and second vertices of the box private Point3d _pnt1 = new Point3d(0, 0, 0); private double _scale = 1000; private double _h = 2085; private Vector3d _vecStraightDirection = new Vector3d(1, 0, 0); private Vector3d _vecDirectionClosed = new Vector3d(1, 0, 0); public enum Status {closed , middle, open}; private Status _dStatus = Status.closed; //added in V 1.1. (monitor fileds) public enum Mon { off, on}; private Mon _monitor = Mon.off; private string _monFilePath = @"E:\test.txt"; // if it is serialized, you may not be able to copy the object in the CAD editor [NonSerialized] private FileSystemWatcher _watcher; [NonSerialized] private FileSystemEventHandler _watchHandler; [CommandMethod("DrawDoor", CommandFlags.NoCheck | CommandFlags.NoPrefix)] public void DrawDoor() { DoorPseudo3D_nc51 door = new DoorPseudo3D_nc51(); door.PlaceObject(); this.TryModify(); // this.Monitor = false; } public override void OnDraw(GeometryBuilder dc) { dc.Clear(); // Define the basic points for drawing Point3d pnt1 = new Point3d(0, 0, 0); Point3d pnt2 = new Point3d(pnt1.X + (984 * _scale), pnt1.Y, 0); Point3d pnt3 = new Point3d(pnt2.X + 0, pnt1.Y+(50 * _scale), 0); Point3d pnt4 = new Point3d(pnt1.X , pnt3.Y, 0) ; // Set the color to ByObject value dc.Color = McDbEntity.ByObject; Vector3d hvec = new Vector3d(0, 0, _h * _scale) ; // Draw the upper and lower sides dc.DrawPolyline(new Point3d[] { pnt1, pnt2, pnt3, pnt4, pnt1 }); dc.DrawPolyline(new Point3d[] { pnt1.Add(hvec), pnt2.Add(hvec), pnt3.Add(hvec), pnt4.Add(hvec), pnt1.Add(hvec)}); // Draw the edges dc.DrawLine(pnt1, pnt1.Add(hvec)); dc.DrawLine(pnt2, pnt2.Add(hvec)); dc.DrawLine(pnt3, pnt3.Add(hvec)); dc.DrawLine(pnt4, pnt4.Add(hvec)); // Drawing a Door Handle dc.DrawLine(pnt2.Add(new Vector3d( -190 * _scale, -0, _h*0.45 * _scale)), pnt2.Add(new Vector3d(-100 * _scale, 0, _h * 0.45 * _scale))); dc.DrawLine(pnt3.Add(new Vector3d(-190 * _scale, 0, _h * 0.45 * _scale)), pnt3.Add(new Vector3d(-100 * _scale, 0, _h * 0.45 * _scale))); } public override hresult PlaceObject(PlaceFlags lInsertType) { InputJig jig = new InputJig(); // Get the first box point from the jig InputResult res = jig.GetPoint("Select first point:"); if (res.Result != InputResult.ResultCode.Normal) return hresult.e_Fail; _pnt1 = res.Point; Stat = Status.closed; // Add the object to the database DbEntity.AddToCurrentDocument(); // added in v.1. return hresult.s_Ok; } /// <summary> /// Method for changing the object's SC (the graph is built at the origin of coordinates). /// </ summary> /// <param name = "tfm"> The matrix for changing the position of the object. </ param> /// <returns> True - if the matrix is passed, False - if not. </ returns> public override bool GetECS(out Matrix3d tfm) { // Create a matrix that transforms the object. // The object is drawn in coordinates(0.0), then it is transformed with the help of this matrix. tfm = Matrix3d.Displacement(this._pnt1.GetAsVector()) * Matrix3d.Rotation (-this._vecStraightDirection.GetAngleTo(Vector3d.XAxis, Vector3d.ZAxis), Vector3d.ZAxis, Point3d.Origin); return true; } public override void OnTransform(Matrix3d tfm) { // To be able to cancel(Undo) McUndoPoint undo = new McUndoPoint(); undo.Start(); // Get the coordinates of the base point and the rotation vector this.TryModify(); this._pnt1 = this._pnt1.TransformBy(tfm); this.TryModify(); this._vecStraightDirection = this._vecStraightDirection.TransformBy(tfm); // We move the door only when it is closed if not - undo if (_dStatus == Status.closed) _vecDirectionClosed = _vecStraightDirection; else { MessageBox.Show("Please transform only closed door (when its status = 0)"); undo.Undo(); } undo.Stop(); } //Define the custom properties of the object [DisplayName("Height")] [Description("Height of door")] [Category("Door options")] public double HDoor { get { return _h; } set { //Save Undo state and set the object status to "Changed" if (!TryModify()) return; _h = value; } } [DisplayName("DScale")] [Description("Door Scale")] [Category("Door options")] public double DScale { get { return _scale; } set { if (!TryModify()) return; _scale = value; } } [DisplayName("Door status")] [Description("0-closed, 1-midle, 2-open")] [Category("Door options")] public Status Stat { get { return _dStatus; } set { //Save Undo state and set the object status to "Changed" if (!TryModify()) return; // Change the rotation vector for each of the door states switch (value) { case Status.closed: _vecStraightDirection = _vecDirectionClosed; break; case Status.middle: _vecStraightDirection = _vecDirectionClosed.Add(_vecDirectionClosed.GetPerpendicularVector().Negate() * 0.575) ; break; case Status.open: _vecStraightDirection = _vecDirectionClosed.GetPerpendicularVector()*-1; break; default: break; } _dStatus = value; } } // Create a grip for the base point of the object public override bool GetGripPoints(GripPointsInfo info) { info.AppendGrip(new McSmartGrip<DoorPseudo3D_nc51>(_pnt1, (obj, g, offset) => { obj.TryModify(); obj._pnt1 += offset; })); return true; } //Define the monitoring custom properties , added v. 1.1: // added in v. 1.1 [DisplayName("Monitoring")] [Description("Monitoring of file for door")] [Category("Monitoring")] public Mon Monitor { get { return _monitor; } set { //Save Undo state and set the object status to "Changed" if (!TryModify()) return; _monitor = value; if (_monitor==Mon.on) { StartMonitoring(); } else StopMonitoring(); } } // added in v. 1.1 [DisplayName("File path for Monitoring")] [Description("Monitoring of file for door")] [Category("Monitoring")] public string MonitoringFilPath { get { return _monFilePath; } set { // Get the command line editor DocumentCollection dm = HostMgd.ApplicationServices.Application.DocumentManager; Editor ed = dm.MdiActiveDocument.Editor; //for hot change filename if (Monitor==Mon.on) { StopMonitoring(); if (!TryModify()) return; _monFilePath = value; StartMonitoring(); ed.WriteMessage("Monitored file is changed"); } else { //Save Undo state and set the object status to "Changed" if (!TryModify()) return; _monFilePath = value; } } } //Define the methods, added v. 1.1: // added in v. 1.1 [PermissionSet(SecurityAction.Demand, Name = "FullTrust")] public void StartMonitoring() { DocumentCollection dm = HostMgd.ApplicationServices.Application.DocumentManager; Editor ed = dm.MdiActiveDocument.Editor; _watcher = new FileSystemWatcher(); if (File.Exists(_monFilePath)) { _watcher.Path = Path.GetDirectoryName(_monFilePath); _watcher.Filter = Path.GetFileName(_monFilePath); _watchHandler = new FileSystemEventHandler(OnChanged); _watcher.Changed += _watchHandler; _watcher.EnableRaisingEvents = true; } else ed.WriteMessage("File: " + _monFilePath + " " + "not Exists"); } // added in v. 1.1 public void StopMonitoring() { if (_watcher != null & _watchHandler != null) { _watcher.Changed -= _watchHandler; _watcher.EnableRaisingEvents = false; } } // added in v. 1.1 private void OnChanged(object source, FileSystemEventArgs e) { DocumentCollection dm = HostMgd.ApplicationServices.Application.DocumentManager; Editor ed = dm.MdiActiveDocument.Editor; ed.WriteMessage("File: " + e.FullPath + " " + e.ChangeType); //read new value from file try { if (File.Exists(_monFilePath)) { int mStatus = -1; ed.WriteMessage("File exists "); using (StreamReader sr = new StreamReader(new FileStream(_monFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))) { if (sr.BaseStream.CanRead) { if (int.TryParse(sr.ReadLine(), out mStatus)) { if (Enum.IsDefined(typeof(Status), mStatus)) { if (!TryModify()) return; Stat = (Status)mStatus; //  if (!TryModify()) return; DbEntity.Update(); McContext.ExecuteCommand("REGENALL"); ed.WriteMessage("Door state is changed"); } else ed.WriteMessage("Incorrect data in the file. Should be in diapason: 0, 1, 2 "); } } else ed.WriteMessage("Can't read file "); } } else ed.WriteMessage("File not exists "); _watcher.EnableRaisingEvents = false; // disable tracking } finally { _watcher.EnableRaisingEvents = true; // reconnect tracking } } } // TODO: There are many shortcomings in this code. // Including failures when working with copying, moving objects and saving files, you can improve it if you want. } 

 using System.Collections.Generic; using Multicad.Runtime; using Multicad.DatabaseServices; using Multicad.Geometry; using Multicad.DatabaseServices.StandardObjects; namespace nano { class penguin { [CommandMethod("DPing", CommandFlags.NoCheck | CommandFlags.NoPrefix)] public void DrawFace() { DbCircle body = new DbCircle(); body.Center = new Point3d(200, 200, 0); body.Radius = 105; body.DbEntity.AddToCurrentDocument(); DbCircle eye1 = new DbCircle(); eye1.Center = new Point3d(150, 255, 0); eye1.Radius = 8; eye1.DbEntity.AddToCurrentDocument(); DbCircle pupil1 = new DbCircle(); pupil1.Center = new Point3d(148, 254, 0); pupil1.Radius = 2; pupil1.DbEntity.AddToCurrentDocument(); DbCircle eye2 = new DbCircle(); eye2.Center = new Point3d(250, 260, 0); eye2.Radius = 8; eye2.DbEntity.AddToCurrentDocument(); DbCircle pupil2 = new DbCircle(); pupil2.Center = new Point3d(252, 258, 0); pupil2.Radius = 2; pupil2.DbEntity.AddToCurrentDocument(); DbLine hand1 = new DbLine(); hand1.StartPoint = new Point3d(102, 239, 0); hand1.EndPoint = new Point3d(72, 183, 0); hand1.DbEntity.AddToCurrentDocument(); DbLine hand2 = new DbLine(); hand2.StartPoint = new Point3d(298, 236, 0); hand2.EndPoint = new Point3d(325, 192, 0); hand2.DbEntity.AddToCurrentDocument(); DbPolyline nose = new DbPolyline(); List<Point3d> nosePoints = new List<Point3d>() { new Point3d(171, 222, 0), new Point3d(198, 177, 0), new Point3d(231, 222, 0) }; nose.Polyline = new Polyline3d(nosePoints); nose.Polyline.SetClosed(false); nose.DbEntity.Transform(McDocumentsManager.GetActiveDoc().UCS); //change coordinates from UCS to WCS for BD nose.DbEntity.AddToCurrentDocument(); DbText spech = new DbText(); spech.Text = new TextGeom("Hello Habr!", new Point3d(310, 55, 0), Vector3d.XAxis, "Standard", 25); spech.DbEntity.AddToCurrentDocument(); } } }