Creating an EllipticalArc3d

[bsamc2000]

Does anyone have an example of the creation of an EllipticalArc3d in C#. I have been searching for days and cannot find anything. I have attempted to figure it out but I have had no luck.

Any help is greatly appreciated.

 

This is what I have started but I am still missing a whole lot I'm afraid.

[font=Consolas][size=2][color=#2b91af][font=Consolas][size=2][color=#2b91af][font=Consolas][size=2][color=#2b91af]EllipticalArc3d[/color][/size][/font][/color][/size][/font][/color][/size][/font][font=Consolas][size=2][font=Consolas][size=2] vEllip = [/size][/font][/size][/font][font=Consolas][size=2][color=#0000ff][font=Consolas][size=2][color=#0000ff][font=Consolas][size=2][color=#0000ff]new[/color][/size][/font][/color][/size][/font][/color][/size][/font][font=Consolas][size=2][color=#2b91af][font=Consolas][size=2][color=#2b91af][font=Consolas][size=2][color=#2b91af]EllipticalArc3d[/color][/size][/font][/color][/size][/font][/color][/size][/font][font=Consolas][size=2][font=Consolas][size=2]();[/size][/font][/size][/font]

[font=Consolas][size=2][font=Consolas][size=2]vEllip.Center = vIns;[/size][/font][/size][/font]
[font=Consolas][size=2][size=2][font=Consolas]vEllip.MajorRadius = 2.0;[/font][/size][/size][/font]
[font=Consolas][size=2][size=2][font=Consolas]vEllip.MinorRadius = 1.0;[/font][/size]

[size=2][font=Consolas]vBtr.AppendEntity(vEllip);[/font][/size]
[/size][/font][font=Consolas][size=2][/size][/font][font=Consolas][size=2][font=Consolas][size=2]vTr.AddNewlyCreatedDBObject(vEllip, [/size][/font][/size][/font][font=Consolas][size=2][color=#0000ff][font=Consolas][size=2][color=#0000ff][font=Consolas][size=2][color=#0000ff]true[/color][/size][/font][/color][/size][/font][/color][/size][/font][font=Consolas][size=2][font=Consolas][size=2]);[/size][/font][/size][/font]

 

 

 

[ReMark]

Would you be using this elliptical arc to create an elliptical dome in 3D by any chance?

[fixo]

You can create an ellipse directly instead,

just play with different angle and other values:

[CommandMethod("eel")]
       public void 
testCreateEllipseArc()

{
           Document 
doc = 
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;


           Editor ed 
= doc.Editor;


           Database 
db = 
doc.Database;

try

{

using (Transaction tr = 
db.TransactionManager.StartTransaction())

{

BlockTableRecord btr = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, 
OpenMode.ForWrite);



Vector3d major= new Vector3d(0,1,0);



double ratio = 0.5;



double startang = Math.PI ; // 0.0  for 



double endang = 1.5 * Math.PI;//2 * Math.PI



Ellipse elp = new Ellipse(new Point3d(0, 0, 0), Vector3d.ZAxis, major, ratio, 
startang, endang);



elp.ColorIndex = 
1;



btr.AppendEntity(elp);



tr.AddNewlyCreatedDBObject(elp, 
true);



tr.Commit();

}

}
           catch 
(Autodesk.AutoCAD.Runtime.Exception 
ex)

{
               Autodesk.AutoCAD.ApplicationServices.Application.ShowAlertDialog(ex.Message + "\n" + ex.StackTrace);

}

finally

{

ed.WriteMessage("\nPokey");

}
       }

Or am I missing something?

 

Another way:

EllipticalArc3d vEllip = new EllipticalArc3d();


                   vEllip.Set(new Point3d(0, 0, 0), new Vector3d(0, 2, 0), 
new Vector3d(1, 0, 0), 2.0, 1.0, 0.0, 2 * Math.PI);


                   Ellipse elp = new Ellipse(vEllip.Center, Vector3d.ZAxis, 
vEllip.MajorAxis, vEllip.MinorRadius / vEllip.MajorRadius, vEllip.StartAngle, 
vEllip.EndAngle);

Edited October 11, 2013 by fixo

[fixo]

This way I've created ellipsoid with no problems,

tested in A2010:

public void 
testCreateEllipsoid()

{
           Document 
doc = 
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;


           Editor ed 
= doc.Editor;


           Database 
db = doc.Database;


           Line 
ln=new Line();


           Solid3d 
sol = new Solid3d();



doc.TransactionManager.EnableGraphicsFlush(true);

try

{

using (Transaction tr = 
db.TransactionManager.StartTransaction())

{

BlockTableRecord btr = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, 
OpenMode.ForWrite);



EllipticalArc3d vEllip = new EllipticalArc3d();



vEllip.Set(new Point3d(0, 0, 0), new Vector3d(0, 2, 0), new Vector3d(1, 0, 0), 
2.0, 1.0, 1.5 * Math.PI, Math.PI / 2);



Ellipse elp = new Ellipse(vEllip.Center, Vector3d.ZAxis, vEllip.MajorAxis, 
vEllip.MinorRadius / vEllip.MajorRadius, vEllip.StartAngle, 
vEllip.EndAngle);



ln = new Line(elp.StartPoint, 
elp.EndPoint);



btr.AppendEntity(elp);



tr.AddNewlyCreatedDBObject(elp, true);



btr.AppendEntity(ln);



tr.TransactionManager.QueueForGraphicsFlush();



tr.AddNewlyCreatedDBObject(ln, true);



tr.TransactionManager.QueueForGraphicsFlush();



sol.RecordHistory = true;



RevolveOptions opts = new RevolveOptions();



RevolveOptionsBuilder rob = new RevolveOptionsBuilder(opts);



rob.CloseToAxis = false;



rob.DraftAngle = 0;



rob.TwistAngle = 0;



sol.CreateRevolvedSolid(elp as Entity, ln.StartPoint, ln.EndPoint.GetAsVector() 
- ln.StartPoint.GetAsVector(), 2 * Math.PI, 0, 
rob.ToRevolveOptions());



btr.AppendEntity(sol);



tr.AddNewlyCreatedDBObject(sol, true);



tr.TransactionManager.QueueForGraphicsFlush();



doc.TransactionManager.FlushGraphics();



ed.Regen();



tr.Commit();





}

}
           catch 
(Autodesk.AutoCAD.Runtime.Exception 
ex)

{

Autodesk.AutoCAD.ApplicationServices.Application.ShowAlertDialog(ex.Message + 
"\n" + 
ex.StackTrace);

}

finally

{



if (sol != 
null)

{

ed.WriteMessage("\nThe ellipsoid is created 
successfully");

}

}
           }

[bsamc2000]

Thank you Fixo. I'm really not sure why I didn't see it before but I completely missed my target on this one. After reading your reply it became clear what I was missing. Thank you for your help.

[fixo]

You're quite welcome, mate

Cheers

Oleg