Hi everybody,
I have a grid into block and want to get coordinate from this grid, but i want to select Block and then read grid into Block, and then define location on the model, or anyway other, can everybody see image and file .DWG below.
I'm using by C.#
Hi,
You should provide more details on how yo want to get these coordintes and show what you have tried so far.
Anyway, you always can transform coordinates from the block defnition (BlockTableRecord) into block reference coordinates using the transformation matrix returned by BlockReference.BlockTransform property.
You should be able to get inspired by this little sample.
using System.Collections.Generic;
using System.Linq;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using AcAp = Autodesk.AutoCAD.ApplicationServices.Core.Application;
namespace GetCoordinatesFromBlockSample
{
public class Commands
{
[CommandMethod("GETCOORDINATESFROMBLOCK")]
public static void GetCoordinatesFromBlock()
{
var doc = AcAp.DocumentManager.MdiActiveDocument;
var db = doc.Database;
var ed = doc.Editor;
var options = new PromptEntityOptions("\nSelect block reference: ");
options.SetRejectMessage("\nSelected object is not a block reference.");
options.AddAllowedClass(typeof(BlockReference), true);
var result = ed.GetEntity(options);
if (result.Status != PromptStatus.OK)
return;
using (var tr = db.TransactionManager.StartTransaction())
{
// get the selected block reference
var blockReference = result.ObjectId.GetObject<BlockReference>();
// get the block definition
var blockDefinition = blockReference.BlockTableRecord.GetObject<BlockTableRecord>();
// collect the polyline vertices in the block definition and transform them as the block reference
var points =
blockDefinition // from the block definition
.GetObjects<Polyline>() // get app polylines
.SelectMany(pl => pl.GetVertices()) // collect the polylines vertices
.Distinct() // remove duplicated points
.Select(p => p.TransformBy(blockReference.BlockTransform)) // transform each point as the block reference
.OrderByDescending(p => p.Y) // order points by Y descending
.ThenBy(p => p.X); // then by X
// print the points coordinates on the command mine and add a red circle on each one
var space = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
foreach (var pt in points)
{
ed.WriteMessage($"\n{pt:0.00}");
var circle = new Circle() { Center = pt, Radius = 2.0, ColorIndex = 1 };
space.AppendEntity(circle);
tr.AddNewlyCreatedDBObject(circle, true);
}
tr.Commit();
}
}
}
static class ExtensionMethods
{
// opens the ObjecId in the specified mode
public static T GetObject<T>(this ObjectId id, OpenMode mode = OpenMode.ForRead) where T : DBObject =>
(T)id.GetObject(mode);
// gets all the the objects of type T in the BlockTable record
public static IEnumerable<T> GetObjects<T>(this BlockTableRecord btr, OpenMode mode = OpenMode.ForRead) where T : Entity
{
var rxClass = RXObject.GetClass(typeof(T));
foreach (ObjectId id in btr)
{
if (id.ObjectClass.IsDerivedFrom(rxClass))
yield return id.GetObject<T>(mode);
}
}
// gets the polyline vertices
public static IEnumerable<Point3d> GetVertices(this Polyline pline)
{
for (int i = 0; i < pline.NumberOfVertices; i++)
{
yield return pline.GetPoint3dAt(i);
}
}
}
}
Using the lambda operator (=>) for single statement returned value came with C#6 (visual Studio 2015).
For prior C# versions, just use the standard return keyword and braces.
Replace:
// opens the ObjecId in the specified mode
public static T GetObject<T>(this ObjectId id, OpenMode mode = OpenMode.ForRead) where T : DBObject =>
(T)id.GetObject(mode);
with:
// opens the ObjecId in the specified mode
public static T GetObject<T>(this ObjectId id, OpenMode mode = OpenMode.ForRead) where T : DBObject
{ return (T)id.GetObject(mode); }
Try this way, without any extension method.
// gets the polyline vertices
public static IEnumerable<Point3d> GetVertices(Polyline pline)
{
for (int i = 0; i < pline.NumberOfVertices; i++)
{
yield return pline.GetPoint3dAt(i);
}
}
[CommandMethod("GETCOORDINATESFROMBLOCK")]
public static void GetCoordinatesFromBlock()
{
var doc = AcAp.DocumentManager.MdiActiveDocument;
var db = doc.Database;
var ed = doc.Editor;
var options = new PromptEntityOptions("\nSelect block reference: ");
options.SetRejectMessage("\nSelected object is not a block reference.");
options.AddAllowedClass(typeof(BlockReference), true);
var result = ed.GetEntity(options);
if (result.Status != PromptStatus.OK)
return;
using (var tr = db.TransactionManager.StartTransaction())
{
// get the selected block reference
var blockReference = (BlockReference)tr.GetObject(result.ObjectId, OpenMode.ForRead);
// get the block definition
var blockDefinition = (BlockTableRecord)tr.GetObject(blockReference.BlockTableRecord, OpenMode.ForRead);
// collect the polyline vertices in the block definition and transform them as the block reference
var points =
blockDefinition // from the block definition
.Cast<ObjectId>() // get all polylines
.Where(id => id.ObjectClass.DxfName == "LWPOLYLINE")
.Select(id => (Polyline)tr.GetObject(id, OpenMode.ForRead))
.SelectMany(pl => GetVertices(pl)) // collect the polylines vertices
.Distinct() // remove duplicated points
.Select(p => p.TransformBy(blockReference.BlockTransform)) // transform each point as the block reference
.OrderByDescending(p => p.Y) // order points by Y descending
.ThenBy(p => p.X); // then by X
// print the points coordinates on the command line and add a red circle on each one
var space = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
foreach (var pt in points)
{
ed.WriteMessage($"\n{pt:0.00}");
var circle = new Circle() { Center = pt, Radius = 1.0, ColorIndex = 1 };
space.AppendEntity(circle);
tr.AddNewlyCreatedDBObject(circle, true);
}
tr.Commit();
}
}
