topic Re: draw polyline realtime in .NET Forum

draw polyline realtime

k005 — Fri, 08 Dec 2023 14:34:42 GMT

Hello friends,

I want to make an addition to this code. In that :

From the first point I clicked, it continues to draw the Polyline without leaving the point...

how can I do that?

Thanks in advance to the helpful friend.

[CommandMethod("HesArea")] public void AreaCalc() { // Prompt the user for 5 points Document acDoc = Application.DocumentManager.MdiActiveDocument; PromptPointResult pPtRes; Point2dCollection colPt = new Point2dCollection(); PromptPointOptions pPtOpts = new PromptPointOptions(""); Application.SetSystemVariable("OSMODE", 32 | 1); BirimCeviri(); // Prompt for the first point pPtOpts.Message = "\nİlk nokta > "; pPtRes = acDoc.Editor.GetPoint(pPtOpts); colPt.Add(new Point2d(pPtRes.Value.X, pPtRes.Value.Y)); // Exit if the user presses ESC or cancels the command if (pPtRes.Status == PromptStatus.Cancel) return; pPtOpts.Message = "\ndiğer nokta >"; pPtOpts.UseBasePoint = true; pPtOpts.AllowNone = true; while (true) { // Use the previous point as the base point pPtOpts.BasePoint = pPtRes.Value; pPtRes = acDoc.Editor.GetPoint(pPtOpts); // Break the loop if the user does not specify a point if (pPtRes.Status != PromptStatus.OK) break; colPt.Add(new Point2d(pPtRes.Value.X, pPtRes.Value.Y)); } using (Polyline acPoly = new Polyline()) { int i = 0; foreach (Point2d point in colPt) { acPoly.AddVertexAt(i, point, 0, 0, 0); } // Close the polyline acPoly.Closed = true; double al1 = acPoly.Area / Durum.BolenA; double cv1 = acPoly.Length / Durum.Bolen; string aLNSonuc = string.Format("\nAlan : {1} Uzunluk : {2}", Environment.NewLine, al1.ToString("F3") + " m²", cv1.ToString("F3") + " m"); System.Windows.Forms.MessageBox.Show(aLNSonuc, "Sonuç"); YaziOlustur("Alan : " + al1.ToString("F2") + " m² Uzunluk : " + cv1.ToString("F2") + " m"); } }

Re: draw polyline realtime

norman.yuan — Fri, 08 Dec 2023 16:14:15 GMT

You probably want to study the topic of "Jig". Searching this forum and/or the net would bring you plenty of sample code to get started with.

Re: draw polyline realtime

k005 — Fri, 08 Dec 2023 17:36:03 GMT

Thanks. I will search

Re: draw polyline realtime

k005 — Fri, 08 Dec 2023 19:02:57 GMT

I did it this way. However, the polyline does not appear on the screen.

[CommandMethod("HesArea")] public void AreaCalc() { // Prompt the user for 5 points Document acDoc = Application.DocumentManager.MdiActiveDocument; Database acCurDb = acDoc.Database; Editor acEd = acDoc.Editor; PromptPointResult pPtRes; Point2dCollection colPt = new Point2dCollection(); PromptPointOptions pPtOpts = new PromptPointOptions(""); Application.SetSystemVariable("OSMODE", 32 | 1); BirimCeviri(); // Prompt for the first point pPtOpts.Message = "\nİlk nokta > "; pPtRes = acDoc.Editor.GetPoint(pPtOpts); colPt.Add(new Point2d(pPtRes.Value.X, pPtRes.Value.Y)); // Exit if the user presses ESC or cancels the command if (pPtRes.Status == PromptStatus.Cancel) return; pPtOpts.Message = "\ndiğer nokta >"; pPtOpts.UseBasePoint = true; pPtOpts.AllowNone = true; while (true) { // Use the previous point as the base point pPtOpts.BasePoint = pPtRes.Value; pPtRes = acDoc.Editor.GetPoint(pPtOpts); // Break the loop if the user does not specify a point if (pPtRes.Status != PromptStatus.OK) break; colPt.Add(new Point2d(pPtRes.Value.X, pPtRes.Value.Y)); } // Start a transaction using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) { // Open the BlockTable for read BlockTable acBlkTbl; acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) as BlockTable; // Open the BlockTableRecord for write BlockTableRecord acBlkTblRec; acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; using (Polyline acPoly = new Polyline()) { int i = 0; foreach (Point2d point in colPt) { acPoly.AddVertexAt(i, point, 0, 0, 0); } // Close the polyline acPoly.Closed = true; // Add the polyline to the drawing acBlkTblRec.AppendEntity(acPoly); acTrans.AddNewlyCreatedDBObject(acPoly, true); double al1 = acPoly.Area / Durum.BolenA; double cv1 = acPoly.Length / Durum.Bolen; string aLNSonuc = string.Format("\nAlan : {1} Uzunluk : {2}", Environment.NewLine, al1.ToString("F3") + " m²", cv1.ToString("F3") + " m"); System.Windows.Forms.MessageBox.Show(aLNSonuc, "Sonuç"); YaziOlustur("Alan : " + al1.ToString("F2") + " m² Uzunluk : " + cv1.ToString("F2") + " m"); } // Commit the changes and dispose of the transaction acTrans.Commit(); } }

Re: draw polyline realtime

kerry_w_brown — Sat, 09 Dec 2023 08:02:33 GMT

Perhaps try incrementing the vertex node index i in the foreach statement

acPoly.AddVertexAt(i, point, 0, 0, 0);

Perhaps try something like : ( untested )

acPoly.AddVertexAt(i++, point, 0, 0, 0);

Re: draw polyline realtime

k005 — Sat, 09 Dec 2023 05:20:59 GMT

I tried it in both code blocks. It didn't work. I couldn't see any polylines on the screen. . He didn't draw. It just catches the point and continues... 😞

Re: draw polyline realtime

kerry_w_brown — Sat, 09 Dec 2023 06:21:27 GMT

This works for me.
I've commented out unnecessary code . . .
The code is essentially your last posted code with iteration of the vertex index in the foreach block in line 60

( as I previously posted )

and translation of the prompts to English.

[CommandMethod("Answer_1209")] public void AreaCalc() { // Prompt the user for 5 points Document acDoc = Application.DocumentManager.MdiActiveDocument; Database acCurDb = acDoc.Database; Editor acEd = acDoc.Editor; PromptPointResult pPtRes; Point2dCollection colPt = new Point2dCollection(); PromptPointOptions pPtOpts = new PromptPointOptions(""); Application.SetSystemVariable("OSMODE", 32 | 1); ////BirimCeviri(); // Prompt for the first point pPtOpts.Message = "\nDraw Polyline First point > "; pPtRes = acDoc.Editor.GetPoint(pPtOpts); colPt.Add(new Point2d(pPtRes.Value.X, pPtRes.Value.Y)); // Exit if the user presses ESC or cancels the command if (pPtRes.Status == PromptStatus.Cancel) return; pPtOpts.Message = "\nNextPoint >"; pPtOpts.UseBasePoint = true; pPtOpts.AllowNone = true; while (true) { // Use the previous point as the base point pPtOpts.BasePoint = pPtRes.Value; pPtRes = acDoc.Editor.GetPoint(pPtOpts); // Break the loop if the user does not specify a point if (pPtRes.Status != PromptStatus.OK) break; colPt.Add(new Point2d(pPtRes.Value.X, pPtRes.Value.Y)); } // Start a transaction using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) { // Open the BlockTable for read BlockTable acBlkTbl; acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) as BlockTable; // Open the BlockTableRecord for write BlockTableRecord acBlkTblRec; acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; using (Polyline acPoly = new Polyline()) { int i = 0; foreach (Point2d point in colPt) { acPoly.AddVertexAt(i++, point, 0, 0, 0); } // Close the polyline acPoly.Closed = true; // Add the polyline to the drawing acBlkTblRec.AppendEntity(acPoly); acTrans.AddNewlyCreatedDBObject(acPoly, true); /* double al1 = acPoly.Area / Durum.BolenA; double cv1 = acPoly.Length / Durum.Bolen; string aLNSonuc = string.Format("\nAlan : {1} Uzunluk : {2}", Environment.NewLine, al1.ToString("F3") + " m²", cv1.ToString("F3") + " m"); System.Windows.Forms.MessageBox.Show(aLNSonuc, "Sonuç"); YaziOlustur("Alan : " + al1.ToString("F2") + " m² Uzunluk : " + cv1.ToString("F2") + " m"); */ } // Commit the changes and dispose of the transaction acTrans.Commit(); } }

Regards,

Re: draw polyline realtime

k005 — Sat, 09 Dec 2023 08:59:10 GMT

I compiled the code you sent. But the problem is;

When I click on the first point and then click on the second point, I should see the polyline between the two points... Not when it ends...

Re: draw polyline realtime

kerry_w_brown — Sat, 09 Dec 2023 10:12:43 GMT

@k005 ,

Then do as suggested by @norman.yuan , build a jig.

If you study the code you posted you will easily see that it is not designed as a jig, but as a simple procedural method. ie collect all the points , then create a closed polyline using the points.

There are many jig examples available in various forums and blogs.

This forum has several ( search Polyline jig )

Kean Walmsley has several

TheSwamp has several

forums.augi.com has several

Github has several

Perhaps a Google search for something like "Polyline jig AutoCAD C#" would be a good start

or try ChatGPT

Regards,

Re: draw polyline realtime

k005 — Sat, 09 Dec 2023 10:07:12 GMT

Ok. Thanks.

Re: draw polyline realtime

k005 — Sat, 09 Dec 2023 10:19:15 GMT

My goal is for the first code I sent to work like in this video...

Re: draw polyline realtime

_gile — Sat, 09 Dec 2023 12:42:28 GMT

Hi,

You should be able to draw inspiration from this answer.

Re: draw polyline realtime

k005 — Sun, 10 Dec 2023 12:49:22 GMT

Yes, I compiled the code. This is the code I'm looking for. Thank you master.

* I'll try merging it with my previous code.

**************************************************************

I combined it. 🙂 🤗