VDF常見(jiàn)問(wèn)題整理（三十六）：如何讀取對(duì)象的幾何屬性（gPoints）？

VectorDraw Developer Framework（VDF）是一個(gè)用于應(yīng)用程序可視化的圖形引擎庫(kù)。有了VDF提供的功能，您可以輕松地創(chuàng)建、編輯、管理、輸出、輸入和打印2D和3D圖形文件。   

VectorDraw Developer Framework試用版下載

問(wèn)：

    工程圖后如何重新讀取對(duì)象的幾何特性（gPoints）？

答：

    您可以使用以下代碼：

 private void ReadProps()
        {
            string msg = ""; 
            System.Diagnostics.Debug.WriteLine("=====START====");
            foreach (vdFigure item in vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.Entities)
            {
                if (item is vdLine)
                {//vdLine's geometry is defined by two gPoints; the StartPoint and the EndPoint//
                    vdLine line = item as vdLine;
                    msg = "vdLINE  StartPoint: " + line.StartPoint.ToString() + "   EndPoint: " + line.EndPoint.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdPolyline)
                {//vdpolyline's geometry is defined by the VertexList which is a collection of points (Vertex)//
                    vdPolyline polyline = item as vdPolyline;
                    msg = "vdPOLYLINE VertexList: " + polyline.VertexList.ToString()+ "\r\n";
                    foreach (Vertex item2 in polyline.VertexList)
                    {
                        msg += item2.ToString() + "\r\n";
                    }
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdCircle)
                {//vdCircle's geometry is defined by the Center point and the Radius// 
                    vdCircle circle = item as vdCircle;
                    msg = "vdCIRCLE Center: " + circle.Center.ToString() + "  Radius: " + circle.Radius.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdRect)
                {//vdRect's geometry is defined by the InsertionPoint and the Width//
                    vdRect rect = item as vdRect;
                    msg = "vdRECT Insertion Point: " + rect.InsertionPoint.ToString() + "  Width: " + rect.Width.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdArc)
                {//vdArc's geometry is defined by the Center point, the Radius, the StartAngle and the EndAngle//
                    vdArc arc = item as vdArc;
                    msg = "vdARC Center Point: " + arc.Center.ToString() + "  Radius: " + arc.Radius.ToString() 
                      + "  StartAngle: "+ arc.StartAngle.ToString()  + "  EndAngle: " + arc.EndAngle.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdEllipse)
                {//vdEllipse's geometry is defined by the Center point the StartAngle,the EndAngle, 
                     // the MajorAngle, MajorLength and the MinorLength//
                    vdEllipse ellipse = item as vdEllipse;
                    msg = "vdELLIPSE Center Point: " + ellipse.Center.ToString() + "  StartAngle: " + ellipse.StartAngle.ToString() 
                        + "  EndAngle: "  + ellipse.EndAngle.ToString() + "  MajorAngle: "  + ellipse.MajorAngle.ToString() 
                        +  "  MajorLength: " + ellipse.MajorLength.ToString() + "  MinorLength: " + ellipse.MinorLength.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdText)
                {//vdText's "geometry" is defined by the InsertionPoint, the Height and the Rotation//
                    vdText text = item as vdText;
                    msg = "vdTEXT Insertion Point: " + text.InsertionPoint.ToString() + "  Heihgt: " + text.Height.ToString() 
                      + "  RotationAngle: "+text.Rotation.ToString() + "  Text: " + text.TextString.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdMText)
                {//vdMText's "geometry" is defined by the InsertionPoint and the Height//
                    vdMText mtext = item as vdMText;
                    msg = "vdMTEXT Insertion Point: " + mtext.InsertionPoint.ToString() + "  Heihgt: " + mtext.Height.ToString()  
                         + "  Text: " + mtext.TextString.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdInfinityLine)
                {//vdInfinityLine's geometry is defined by the BasePoint and the Direction//
                    vdInfinityLine xline = item as vdInfinityLine;
                    msg = "vdXLINE Base Point: "+xline.BasePoint.ToString()+"  Direction: "+ xline.Direction.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdPolyface)
                {//vdPolyface's geometry is defined by the VertexList which is a collection of points (gPoint)//
                    vdPolyface cone = item as vdPolyface;
                    msg = "vdPOLYFACE VertexList: " + cone.VertexList.ToString() + "\r\n";
                    foreach (gPoint item3 in cone.VertexList)
                    {
                        msg += item3.ToString() + "\r\n";
                    }
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vdInsert)
                {//vdInsert's geometry is defined by the InsertionPoint, the Rotation, the scales and of course the block's objects)//
                    vdInsert insert = item as vdInsert;
                    msg = "vdINSERT Block Name: " + insert.Block.Name.ToString() +  "  Insertion Point: " + insert.InsertionPoint.ToString() 
                    + "  RotationAngle: " + insert.Rotation.ToString() + "\r\n" + "vdINSERT Xscale: " + insert.Xscale.ToString() + "  Yscale: " 
                    + insert.Yscale.ToString() +  "  vdINSERT Zscale: " + insert.Zscale.ToString();
                    System.Diagnostics.Debug.WriteLine(msg);
                }
                if (item is vd3DFace)
                {//vd3DFace's geometry is defined by the VertexList which is a collection of points (gPoint)//
                    vd3DFace face = item as vd3DFace;
                    msg = "vd3DFACE VertexList: " + face.VertexList.ToString() + "\r\n";
                    foreach (gPoint item4 in face.VertexList)
                    {
                        msg += item4.ToString() + "\r\n";
                    }
                    System.Diagnostics.Debug.WriteLine(msg);
                }//vdPolyhatch's geometry is defined by the geometry of every vdCurve which that is consisted//
                if (item is vdPolyhatch)
                {
                    vdPolyhatch hatch = item as vdPolyhatch;
                    msg = "vdHATCH PolyCurves: " + hatch.PolyCurves.ToString() + "\r\n";
                    foreach (vdCurves item2 in hatch.PolyCurves)
                    {
                        foreach (vdCurve item3 in item2)
                        {
                            msg += "PolyCurve: " + item3.ToString()+"\r\n";
                        }
                        
                    }
                    System.Diagnostics.Debug.WriteLine(msg);
                }
            }
            System.Diagnostics.Debug.WriteLine("=====END====");
        }

    請(qǐng)注意，所有這些對(duì)象還具有一個(gè)定義這些對(duì)象中某些對(duì)象的平面的拉伸向量（如vdInsert，vdCircle，vdEllipse，vdArc，vdText / MText，vdPolyhatch）。

    對(duì)于以上問(wèn)答，如果您有任何的疑惑都可以在評(píng)論區(qū)留言，我們會(huì)及時(shí)回復(fù)。此系列的問(wèn)答教程我們會(huì)持續(xù)更新，如果您感興趣，可以多多關(guān)注本教程。

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