编辑图案填充边界 （.NET）

追加循环

将循环追加到填充。您可以定义用方法的第一个参数和枚举定义的常量附加的循环类型。AppendLoopHatchLoopTypes

GetLoopAt

获取填充的给定索引处的循环。

InsertLoopAt

在填充的给定索引处插入循环。

删除循环

删除填充的给定索引处的循环。

LoopTypeAt

获取填充的给定索引处的循环类型。

循环数

获取填充的循环数。

VB.NET

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
 
<CommandMethod("EditHatchAppendLoop")> _
Public Sub EditHatchAppendLoop()
    '' Get the current document and database
    Dim acDoc As Document = Application.DocumentManager.MdiActiveDocument
    Dim acCurDb As Database = acDoc.Database

    '' Start a transaction
    Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction()

        '' Open the Block table for read
        Dim acBlkTbl As BlockTable
        acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, _
                                     OpenMode.ForRead)

        '' Open the Block table record Model space for write
        Dim acBlkTblRec As BlockTableRecord
        acBlkTblRec = acTrans.GetObject(acBlkTbl(BlockTableRecord.ModelSpace), _
                                        OpenMode.ForWrite)

        '' Create an arc object for the closed boundary to hatch
        Using acArc As Arc = New Arc(New Point3d(5, 3, 0), 3, 0, 3.141592)

            acBlkTblRec.AppendEntity(acArc)
            acTrans.AddNewlyCreatedDBObject(acArc, True)

            '' Create an line object for the closed boundary to hatch
            Using acLine As Line = New Line(acArc.StartPoint, acArc.EndPoint)

                acBlkTblRec.AppendEntity(acLine)
                acTrans.AddNewlyCreatedDBObject(acLine, True)

                '' Adds the arc and line to an object id collection
                Dim acObjIdColl As ObjectIdCollection = New ObjectIdCollection()
                acObjIdColl.Add(acArc.ObjectId)
                acObjIdColl.Add(acLine.ObjectId)

                '' Create the hatch object and append it to the block table record
                Using acHatch As Hatch = New Hatch()
                    acBlkTblRec.AppendEntity(acHatch)
                    acTrans.AddNewlyCreatedDBObject(acHatch, True)

                    '' Set the properties of the hatch object
                    '' Associative must be set after the hatch object is appended to the 
                    '' block table record and before AppendLoop
                    acHatch.SetHatchPattern(HatchPatternType.PreDefined, "ANSI31")
                    acHatch.Associative = True
                    acHatch.AppendLoop(HatchLoopTypes.Outermost, acObjIdColl)

                    '' Create a circle object for the inner boundary of the hatch
                    Using acCirc As Circle = New Circle()
                        acCirc.Center = New Point3d(5, 4.5, 0)
                        acCirc.Radius = 1

                        acBlkTblRec.AppendEntity(acCirc)
                        acTrans.AddNewlyCreatedDBObject(acCirc, True)

                        '' Adds the circle to an object id collection
                        acObjIdColl.Clear()
                        acObjIdColl.Add(acCirc.ObjectId)

                        '' Append the circle as the inner loop of the hatch and evaluate it
                        acHatch.AppendLoop(HatchLoopTypes.Default, acObjIdColl)
                        acHatch.EvaluateHatch(True)
                    End Using
                End Using
            End Using
        End Using

        '' Save the new object to the database
        acTrans.Commit()
    End Using
End Sub

C#

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
 
[CommandMethod("EditHatchAppendLoop")]
public static void EditHatchAppendLoop()
{
    // Get the current document and database
    Document acDoc = Application.DocumentManager.MdiActiveDocument;
    Database acCurDb = acDoc.Database;

    // Start a transaction
    using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
    {
        // Open the Block table for read
        BlockTable acBlkTbl;
        acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
                                        OpenMode.ForRead) as BlockTable;

        // Open the Block table record Model space for write
        BlockTableRecord acBlkTblRec;
        acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
                                        OpenMode.ForWrite) as BlockTableRecord;

        // Create an arc object for the closed boundary to hatch
        using (Arc acArc = new Arc(new Point3d(5, 3, 0), 3, 0, 3.141592))
        {

            acBlkTblRec.AppendEntity(acArc);
            acTrans.AddNewlyCreatedDBObject(acArc, true);

            // Create an line object for the closed boundary to hatch
            using (Line acLine = new Line(acArc.StartPoint, acArc.EndPoint))
            {
                acBlkTblRec.AppendEntity(acLine);
                acTrans.AddNewlyCreatedDBObject(acLine, true);

                // Adds the arc and line to an object id collection
                ObjectIdCollection acObjIdColl = new ObjectIdCollection();
                acObjIdColl.Add(acArc.ObjectId);
                acObjIdColl.Add(acLine.ObjectId);

                // Create the hatch object and append it to the block table record
                using (Hatch acHatch = new Hatch())
                {
                    acBlkTblRec.AppendEntity(acHatch);
                    acTrans.AddNewlyCreatedDBObject(acHatch, true);

                    // Set the properties of the hatch object
                    // Associative must be set after the hatch object is appended to the 
                    // block table record and before AppendLoop
                    acHatch.SetHatchPattern(HatchPatternType.PreDefined, "ANSI31");
                    acHatch.Associative = true;
                    acHatch.AppendLoop(HatchLoopTypes.Outermost, acObjIdColl);

                    // Create a circle object for the inner boundary of the hatch
                    using (Circle acCirc = new Circle())
                    {
                        acCirc.Center = new Point3d(5, 4.5, 0);
                        acCirc.Radius = 1;

                        acBlkTblRec.AppendEntity(acCirc);
                        acTrans.AddNewlyCreatedDBObject(acCirc, true);

                        // Adds the circle to an object id collection
                        acObjIdColl.Clear();
                        acObjIdColl.Add(acCirc.ObjectId);

                        // Append the circle as the inner loop of the hatch and evaluate it
                        acHatch.AppendLoop(HatchLoopTypes.Default, acObjIdColl);
                        acHatch.EvaluateHatch(true);
                    }
                }
            }
        }

        // Save the new object to the database
        acTrans.Commit();
    }
}

VBA/ActiveX Code Reference

Sub EditHatchAppendLoop()
    Dim hatchObj As AcadHatch
    Dim patternName As String
    Dim PatternType As Long
    Dim bAssociativity As Boolean
 
    ' Define and create the hatch
    patternName = "ANSI31"
    PatternType = 0
    bAssociativity = True
    Set hatchObj = ThisDrawing.ModelSpace. _
                       AddHatch(PatternType, patternName, bAssociativity)
 
    ' Create the outer loop for the hatch.
    Dim outerLoop(0 To 1) As AcadEntity
    Dim center(0 To 2) As Double
    Dim radius As Double
    Dim startAngle As Double
    Dim endAngle As Double
    center(0) = 5: center(1) = 3: center(2) = 0
    radius = 3
    startAngle = 0
    endAngle = 3.141592
    Set outerLoop(0) = ThisDrawing.ModelSpace. _
                           AddArc(center, radius, startAngle, endAngle)
    Set outerLoop(1) = ThisDrawing.ModelSpace. _
                           AddLine(outerLoop(0).startPoint, outerLoop(0).endPoint)
 
    ' Append the outer loop to the hatch object
    hatchObj.AppendOuterLoop (outerLoop)
 
    ' Create a circle as the inner loop for the hatch.
    Dim innerLoop(0) As AcadEntity
    center(0) = 5: center(1) = 4.5: center(2) = 0
    radius = 1
    Set innerLoop(0) = ThisDrawing.ModelSpace. _
                           AddCircle(center, radius)
 
    ' Append the circle as an inner loop to the hatch
    hatchObj.AppendInnerLoop (innerLoop)
 
    ' Evaluate and display the hatch
    hatchObj.Evaluate
    ThisDrawing.Regen True
End Sub