在AutoCAD中多视口展示多张图纸(AutoCAD2018及以上版本可用)

epwt · 发表于 2024-3-19 19:46:24

真实场景中，用户存在多张图纸，假设是平面图、剖面图、三维图。用户需要在AutoCAD中修改某些图纸的细节，使其更符合真实情况。但是修改图纸需要其它图纸做参考，以防出错。因此，同一个窗口，显示多张图纸，方便用户校对数据、修改的需求就出现了。

先上效果吧：

一开始想用最简单的方案，直接调用Autocad的命令，把多张图纸的tab窗体显示出来，让用户自己修改。发现这个不友好，一是用户得处理开始窗体。开始界面一直显示，没法拿到它的句柄，把它最小化，又不能侵入性地把开始界面藏起来。二是这个命令只能平分，遇到个性化需求就无法满足了。给大家看看这个方案出来的效果：

查找资料，最后决定使用视口来解决这个问题。但是视口也有局限性，视口只能对一张图纸进行多视口操作，咱们多张图纸就显得力不从心了。于是就想了个能实现需求的办法，把多张图纸合并成一张，然后开3个视口，每个视口居中显示不同的范围，看起来就像在操作多张图纸了。
      但是也有一个局限，那就是其实三个视口显示的都是一张被合并的图纸，用户缩小或者拖拽，就找不到原先的视口了。于是我们加了个定位的按钮，记录下每个视口在整张图纸中的居中范围，用户找不到修改的图纸了，就可以点击这个按钮进行复原操作。
      还有最后一个问题，用户修改的图纸，怎么分成3张存回到对应的图纸上去？因为我们修改的是同一张图纸，虽然我们记录了原图在被合并后图纸中的范围，但是用户可能在任意范围添加图形元素。我们可以加个按钮，让用户在保存的时候框选区域，选择对应的图纸类型(屏幕、剖面、三维)就可以了。
      解决方案定了，剩下就是写代码的事情了。我们要做的事情如下：

把3张dwg图纸合并成1张dwg，并记录下原始图纸在合并后图纸的范围，用于后期做视口居中操作。注意，由于是多图操作，记得CommandFlags.Session设置上。本文简化使用了块参照。需要注意的是，块插入的时候插入点需要计算一下，防止图纸重叠。
按照比例创建想要的视口，并在不同视口对图纸进行不同范围的居中操作。

事情定了，就看看是不是已经有代码实现了这些操作。拼一拼，改一改，看能不能快速实现这个需求。查找了编程宝典《AutoCAD VBA&VB.NET开发基础与实例教程》有关于视口的代码，但是不能完全满足需求，代码最终是靠命令实现的视口创建。也许在当时那个版本，还没有C#的接口开放吧。最后参考了AutoCAD的官方blog，这篇
https://adndevblog.typepad.com/a ... ographic-views.html

拿着代码改了改，很快就实现了需求。

上源码

[CommandMethod("STVP", CommandFlags.Session)]
public void SpliterThreeViewPort()
{
string templateFile = @"acad.dwt";
//把三张图纸变成块参照放到一张图纸中
//todo:替换成你自己的图纸路径
string sectionalView = "../剖面图.dwg";
string threeDView = "../三维图.dwg";
string planView = "../平面图.dwg";
List<string> drawingNames = new List<string> { planView, sectionalView, threeDView };
Dictionary<string, ObjectId> dicBlocks = new Dictionary<string, ObjectId>();
//新建一张图纸
//todo:替换成你自己的图纸路径
string combinedPath = @"../combined.dwg";
Document tempDoc = Application.DocumentManager.Add(templateFile);
Application.DocumentManager.MdiActiveDocument = tempDoc;
tempDoc.Database.SaveAs(combinedPath, DwgVersion.Current);
Document combinDoc = Application.DocumentManager.Open(combinedPath);
Application.DocumentManager.MdiActiveDocument = combinDoc;
string blockName = string.Empty;
List<string> blockNames = new List<string>();
for (int i = 0; i < drawingNames.Count; i++)
{
blockName = Path.GetFileNameWithoutExtension(drawingNames);
ImportDrawingAsBlkstoCurDoc(combinDoc, drawingNames, combinedPath);
blockNames.Add(blockName);
}
Dictionary<string, Extents3d> dicBlockExtents = InsertBlocks(combinDoc, blockNames);
Application.DocumentManager.MdiActiveDocument = combinDoc;
//打开图纸，分成3个视口，并且按照块参照的名称分别居中每个视口的图纸
SplitAndSetViewModelViewports(combinDoc, dicBlockExtents.Values.ToList());
}

[CommandMethod("STVP", CommandFlags.Session)] 
 public void SpliterThreeViewPort() 
 { 
     string templateFile = @"acad.dwt"; 
     //把三张图纸变成块参照放到一张图纸中 
     //todo:替换成你自己的图纸路径 
     string sectionalView = "../剖面图.dwg"; 
     string threeDView = "../三维图.dwg"; 
     string planView = "../平面图.dwg"; 
 
     List<string> drawingNames = new List<string> { planView, sectionalView, threeDView }; 
     Dictionary<string, ObjectId> dicBlocks = new Dictionary<string, ObjectId>(); 
 
     //新建一张图纸 
    //todo:替换成你自己的图纸路径 
     string combinedPath = @"../combined.dwg"; 
     Document tempDoc = Application.DocumentManager.Add(templateFile); 
     Application.DocumentManager.MdiActiveDocument = tempDoc; 
     tempDoc.Database.SaveAs(combinedPath, DwgVersion.Current); 
 
     Document combinDoc = Application.DocumentManager.Open(combinedPath); 
     Application.DocumentManager.MdiActiveDocument = combinDoc; 
 
     string blockName = string.Empty; 
     List<string> blockNames = new List<string>(); 
     for (int i = 0; i < drawingNames.Count; i++) 
     { 
         blockName = Path.GetFileNameWithoutExtension(drawingNames); 
         ImportDrawingAsBlkstoCurDoc(combinDoc, drawingNames, combinedPath); 
         blockNames.Add(blockName); 
     } 
 
     Dictionary<string, Extents3d> dicBlockExtents = InsertBlocks(combinDoc, blockNames); 
     Application.DocumentManager.MdiActiveDocument = combinDoc; 
     //打开图纸，分成3个视口，并且按照块参照的名称分别居中每个视口的图纸    
     SplitAndSetViewModelViewports(combinDoc, dicBlockExtents.Values.ToList()); 
 }

public Dictionary<string, Extents3d> InsertBlocks(Document doc, List<string> blockNames)

{

 // 记录已插入块参照的外包围框

 Dictionary<string, Extents3d> dicBlockExtents = new Dictionary<string, Extents3d>();

 Database db = doc.Database;

 // 获取要插入的块名称列表

 using (DocumentLock docLock = doc.LockDocument())

 {

 db.UpdateExt(true);

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

 {

 BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;

 BlockTableRecord modelSpace = tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;

 Point3d insertPosition = Point3d.Origin;

 foreach (string blockName in blockNames)

 {

 // 获取块定义

 ObjectId blockId = bt[blockName];

 if (blockId.IsNull)

 {

 continue;

 }

 // 创建块参照

 using (BlockReference blockRef = new BlockReference(insertPosition, blockId))

 {

 // 计算块的外包围框

 blockRef.TransformBy(Matrix3d.Scaling(1, insertPosition));

 Extents3d blockExtents = blockRef.GeometricExtents;

 // 将块参照插入模型空间

 modelSpace.AppendEntity(blockRef);

 tr.AddNewlyCreatedDBObject(blockRef, true);

 // 更新已插入块参照的外包围框列表

 dicBlockExtents.Add(blockName, blockExtents);

 insertPosition = blockExtents.MaxPoint;

 }

 }

 tr.Commit();

 }

 }

 return dicBlockExtents;

}
public Dictionary<string, Extents3d> InsertBlocks(Document doc, List<string> blockNames) { // 记录已插入块参照的外包围框 Dictionary<string, Extents3d> dicBlockExtents = new Dictionary<string, Extents3d>(); Database db = doc.Database; // 获取要插入的块名称列表 using (DocumentLock docLock = doc.LockDocument()) { db.UpdateExt(true); using (Transaction tr = db.TransactionManager.StartTransaction()) { BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable; BlockTableRecord modelSpace = tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; Point3d insertPosition = Point3d.Origin; foreach (string blockName in blockNames) { // 获取块定义 ObjectId blockId = bt[blockName]; if (blockId.IsNull) { continue; } // 创建块参照 using (BlockReference blockRef = new BlockReference(insertPosition, blockId)) { // 计算块的外包围框 blockRef.TransformBy(Matrix3d.Scaling(1, insertPosition)); Extents3d blockExtents = blockRef.GeometricExtents; // 将块参照插入模型空间 modelSpace.AppendEntity(blockRef); tr.AddNewlyCreatedDBObject(blockRef, true); // 更新已插入块参照的外包围框列表 dicBlockExtents.Add(blockName, blockExtents); insertPosition = blockExtents.MaxPoint; } } tr.Commit(); } } return dicBlockExtents; }

public static void SplitAndSetViewModelViewports(Document doc, Dictionary<string, Extents3d> dicExtents)

{

using (DocumentLock docLock = doc.LockDocument())

{

 Database db = doc.Database;

 db.UpdateExt(true);

 Extents3d dbExtent = new Extents3d(db.Extmin, db.Extmax);

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

 {

 ViewportTable vt = tr.GetObject(

 db.ViewportTableId, OpenMode.ForWrite)

 as ViewportTable;

 ViewportTableRecord vtr1 = tr.GetObject(

 doc.Editor.ActiveViewportId,

 OpenMode.ForWrite) as ViewportTableRecord;

 Point2d ll = vtr1.LowerLeftCorner;

 Point2d ur = vtr1.UpperRightCorner;

 List<string> extentsKeys = dicExtents.Keys.ToList();

 vtr1.LowerLeftCorner = ll;

 vtr1.UpperRightCorner = new Point2d(

 ll.X + (ur.X - ll.X) * 0.5,

 ll.Y + (ur.Y - ll.Y));

 vtr1.SetViewDirection(OrthographicView.TopView);

 ZoomExtents(vtr1, dicExtents[extentsKeys[0]]);

 ViewportTableRecord vtr2 =

 CreateVTR(vt, vtr1,

 new Point2d(ll.X + (ur.X - ll.X) * 0.5, ll.Y + (ur.Y - ll.Y) * 0.5),

 new Point2d(ll.X + (ur.X - ll.X), ll.Y + (ur.Y - ll.Y)),

 dicExtents[extentsKeys[1]], OrthographicView.TopView);

 vt.Add(vtr2);

 tr.AddNewlyCreatedDBObject(vtr2, true);

 ViewportTableRecord vtr3 =

 CreateVTR(vt, vtr1,

 new Point2d(ll.X + (ur.X - ll.X) * 0.5, ll.Y),

 new Point2d(ll.X + (ur.X - ll.X), ll.Y + (ur.Y - ll.Y) * 0.5),

 dicExtents[extentsKeys[2]], OrthographicView.TopView);

 vt.Add(vtr3);

 tr.AddNewlyCreatedDBObject(vtr3, true);

 // Update the display with new tiled viewports

 doc.Editor.UpdateTiledViewportsFromDatabase();

 // Commit the changes

 tr.Commit();

 }

}

}

/// <summary>

/// 将图纸作为一个块整个插入导数据库

/// </summary>

/// <param name="destDb"></param>

/// <param name="FileName">图纸的完整路径,dxf或者dwg都可以</param>

/// <returns></returns>

///

public static void ImportDrawingAsBlkstoCurDoc(Document destDoc, string strFileName, string savePath)

{

using (DocumentLock docLock = destDoc.LockDocument())

{

 using (Database db = new Database(false, true))

 {

 // Read the DWG into our side database

 db.ReadDwgFile(strFileName, FileShare.Read, true, "");

 // Create a list of block identifiers (will only contain one entry, the modelspace ObjectId)

 ObjectIdCollection ids = new ObjectIdCollection();

 // Start a transaction on the source database

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

 {

 // Open the block table

 BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);

 // Add modelspace to list of blocks to import

 ids.Add(bt[BlockTableRecord.ModelSpace]);

 // Committing is cheaper than aborting

 tr.Commit();

 }

 // Copy our modelspace block from the source to

 // destination database

 // (will also copy required, referenced objects)

 IdMapping im = new IdMapping();

 db.WblockCloneObjects(

 ids,

 destDoc.Database.BlockTableId,

 im,

 DuplicateRecordCloning.MangleName,

 false

 );

 using (Transaction tr2 = destDoc.Database.TransactionManager.StartTransaction())

 {

 // Work through the results of the WblockClone

 foreach (IdPair ip in im)

 {

 // Open each new destination object, checking for

 // BlockTableRecords

 BlockTableRecord btr = tr2.GetObject(ip.Value, OpenMode.ForRead) as BlockTableRecord;

 if (btr != null)

 {

 // If the name starts with the modelspace string

 if (btr.Name.StartsWith(BlockTableRecord.ModelSpace, StringComparison.InvariantCultureIgnoreCase))

 {

 // Get write access to it and change the name

 // to that of the source drawing

 btr.UpgradeOpen();

 btr.Name = Path.GetFileNameWithoutExtension(strFileName);

 }

 }

 }

 db.UpdateExt(true);

 // We need to commit, as we've made changes

 tr2.Commit();

 }

 db.SaveAs(savePath, DwgVersion.Current);

 }

}

}

public static ViewportTableRecord CreateVTR(

ViewportTable vt, ViewportTableRecord refVTR,

Point2d ll, Point2d ur, Extents3d dbExtent,

OrthographicView ov)

{

ViewportTableRecord newVTR = new ViewportTableRecord();

newVTR.LowerLeftCorner = ll;

newVTR.UpperRightCorner = ur;

newVTR.Name = "*Active";

newVTR.ViewDirection = refVTR.ViewDirection;

newVTR.ViewTwist = refVTR.ViewTwist;

newVTR.Target = refVTR.Target;

newVTR.BackClipEnabled = refVTR.BackClipEnabled;

newVTR.BackClipDistance = refVTR.BackClipDistance;

newVTR.FrontClipEnabled = refVTR.FrontClipEnabled;

newVTR.FrontClipDistance = refVTR.FrontClipDistance;

newVTR.Elevation = refVTR.Elevation;

newVTR.SetViewDirection(ov);

ZoomExtents(newVTR, dbExtent);

return newVTR;

}

public static void ZoomExtents

(ViewportTableRecord vtr, Extents3d dbExtent)

{

//get the screen aspect ratio to

// calculate the height and width

double scrRatio = (vtr.Width / vtr.Height);

//prepare Matrix for DCS to WCS transformation

Matrix3d matWCS2DCS

 = Matrix3d.PlaneToWorld(vtr.ViewDirection);

//for DCS target point is the origin

matWCS2DCS = Matrix3d.Displacement

 (vtr.Target - Point3d.Origin) * matWCS2DCS;

//WCS Xaxis is twisted by twist angle

matWCS2DCS = Matrix3d.Rotation(-vtr.ViewTwist,

 vtr.ViewDirection,

 vtr.Target

 ) * matWCS2DCS;

matWCS2DCS = matWCS2DCS.Inverse();

//tranform the extents to the DCS

// defined by the viewdir

dbExtent.TransformBy(matWCS2DCS);

//width of the extents in current view

double width

 = (dbExtent.MaxPoint.X - dbExtent.MinPoint.X);

//height of the extents in current view

double height

 = (dbExtent.MaxPoint.Y - dbExtent.MinPoint.Y);

//get the view center point

Point2d center = new Point2d(

 (dbExtent.MaxPoint.X + dbExtent.MinPoint.X) * 0.5,

 (dbExtent.MaxPoint.Y + dbExtent.MinPoint.Y) * 0.5);

//check if the width' in current window

//if not then get the new height as per the

// viewports aspect ratio

if (width > (height * scrRatio))

 height = width / scrRatio;

vtr.Height = height;

vtr.Width = height * scrRatio;

vtr.CenterPoint = center;

}
public static void SplitAndSetViewModelViewports(Document doc, Dictionary<string, Extents3d> dicExtents) { using (DocumentLock docLock = doc.LockDocument()) { Database db = doc.Database; db.UpdateExt(true); Extents3d dbExtent = new Extents3d(db.Extmin, db.Extmax); using (Transaction tr = db.TransactionManager.StartTransaction()) { ViewportTable vt = tr.GetObject( db.ViewportTableId, OpenMode.ForWrite) as ViewportTable; ViewportTableRecord vtr1 = tr.GetObject( doc.Editor.ActiveViewportId, OpenMode.ForWrite) as ViewportTableRecord; Point2d ll = vtr1.LowerLeftCorner; Point2d ur = vtr1.UpperRightCorner; List<string> extentsKeys = dicExtents.Keys.ToList(); vtr1.LowerLeftCorner = ll; vtr1.UpperRightCorner = new Point2d( ll.X + (ur.X - ll.X) * 0.5, ll.Y + (ur.Y - ll.Y)); vtr1.SetViewDirection(OrthographicView.TopView); ZoomExtents(vtr1, dicExtents[extentsKeys[0]]); ViewportTableRecord vtr2 = CreateVTR(vt, vtr1, new Point2d(ll.X + (ur.X - ll.X) * 0.5, ll.Y + (ur.Y - ll.Y) * 0.5), new Point2d(ll.X + (ur.X - ll.X), ll.Y + (ur.Y - ll.Y)), dicExtents[extentsKeys[1]], OrthographicView.TopView); vt.Add(vtr2); tr.AddNewlyCreatedDBObject(vtr2, true); ViewportTableRecord vtr3 = CreateVTR(vt, vtr1, new Point2d(ll.X + (ur.X - ll.X) * 0.5, ll.Y), new Point2d(ll.X + (ur.X - ll.X), ll.Y + (ur.Y - ll.Y) * 0.5), dicExtents[extentsKeys[2]], OrthographicView.TopView); vt.Add(vtr3); tr.AddNewlyCreatedDBObject(vtr3, true); // Update the display with new tiled viewports doc.Editor.UpdateTiledViewportsFromDatabase(); // Commit the changes tr.Commit(); } } } /// <summary> /// 将图纸作为一个块整个插入导数据库 /// </summary> /// <param name="destDb"></param> /// <param name="FileName">图纸的完整路径,dxf或者dwg都可以</param> /// <returns></returns> /// public static void ImportDrawingAsBlkstoCurDoc(Document destDoc, string strFileName, string savePath) { using (DocumentLock docLock = destDoc.LockDocument()) { using (Database db = new Database(false, true)) { // Read the DWG into our side database db.ReadDwgFile(strFileName, FileShare.Read, true, ""); // Create a list of block identifiers (will only contain one entry, the modelspace ObjectId) ObjectIdCollection ids = new ObjectIdCollection(); // Start a transaction on the source database using (Transaction tr = db.TransactionManager.StartTransaction()) { // Open the block table BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead); // Add modelspace to list of blocks to import ids.Add(bt[BlockTableRecord.ModelSpace]); // Committing is cheaper than aborting tr.Commit(); } // Copy our modelspace block from the source to // destination database // (will also copy required, referenced objects) IdMapping im = new IdMapping(); db.WblockCloneObjects( ids, destDoc.Database.BlockTableId, im, DuplicateRecordCloning.MangleName, false ); using (Transaction tr2 = destDoc.Database.TransactionManager.StartTransaction()) { // Work through the results of the WblockClone foreach (IdPair ip in im) { // Open each new destination object, checking for // BlockTableRecords BlockTableRecord btr = tr2.GetObject(ip.Value, OpenMode.ForRead) as BlockTableRecord; if (btr != null) { // If the name starts with the modelspace string if (btr.Name.StartsWith(BlockTableRecord.ModelSpace, StringComparison.InvariantCultureIgnoreCase)) { // Get write access to it and change the name // to that of the source drawing btr.UpgradeOpen(); btr.Name = Path.GetFileNameWithoutExtension(strFileName); } } } db.UpdateExt(true); // We need to commit, as we've made changes tr2.Commit(); } db.SaveAs(savePath, DwgVersion.Current); } } } public static ViewportTableRecord CreateVTR( ViewportTable vt, ViewportTableRecord refVTR, Point2d ll, Point2d ur, Extents3d dbExtent, OrthographicView ov) { ViewportTableRecord newVTR = new ViewportTableRecord(); newVTR.LowerLeftCorner = ll; newVTR.UpperRightCorner = ur; newVTR.Name = "*Active"; newVTR.ViewDirection = refVTR.ViewDirection; newVTR.ViewTwist = refVTR.ViewTwist; newVTR.Target = refVTR.Target; newVTR.BackClipEnabled = refVTR.BackClipEnabled; newVTR.BackClipDistance = refVTR.BackClipDistance; newVTR.FrontClipEnabled = refVTR.FrontClipEnabled; newVTR.FrontClipDistance = refVTR.FrontClipDistance; newVTR.Elevation = refVTR.Elevation; newVTR.SetViewDirection(ov); ZoomExtents(newVTR, dbExtent); return newVTR; } public static void ZoomExtents (ViewportTableRecord vtr, Extents3d dbExtent) { //get the screen aspect ratio to // calculate the height and width double scrRatio = (vtr.Width / vtr.Height); //prepare Matrix for DCS to WCS transformation Matrix3d matWCS2DCS = Matrix3d.PlaneToWorld(vtr.ViewDirection); //for DCS target point is the origin matWCS2DCS = Matrix3d.Displacement (vtr.Target - Point3d.Origin) * matWCS2DCS; //WCS Xaxis is twisted by twist angle matWCS2DCS = Matrix3d.Rotation(-vtr.ViewTwist, vtr.ViewDirection, vtr.Target ) * matWCS2DCS; matWCS2DCS = matWCS2DCS.Inverse(); //tranform the extents to the DCS // defined by the viewdir dbExtent.TransformBy(matWCS2DCS); //width of the extents in current view double width = (dbExtent.MaxPoint.X - dbExtent.MinPoint.X); //height of the extents in current view double height = (dbExtent.MaxPoint.Y - dbExtent.MinPoint.Y); //get the view center point Point2d center = new Point2d( (dbExtent.MaxPoint.X + dbExtent.MinPoint.X) * 0.5, (dbExtent.MaxPoint.Y + dbExtent.MinPoint.Y) * 0.5); //check if the width' in current window //if not then get the new height as per the // viewports aspect ratio if (width > (height * scrRatio)) height = width / scrRatio; vtr.Height = height; vtr.Width = height * scrRatio; vtr.CenterPoint = center; }

你有种再说一遍 · 发表于 2024-3-19 20:47:28

早说要VTR,为什么不早说...阿惊啥东西没敲过(嘻)

lxl217114 · 发表于 2024-3-19 22:34:08

你有种再说一遍发表于 2024-3-19 20:47
早说要VTR,为什么不早说...阿惊啥东西没敲过(嘻)

大家一起喊：“惊神”（破音）

yefei812678 · 发表于 2024-3-20 07:56:56

感谢分享感谢分享感谢分享

zilong136 · 发表于 2024-3-20 12:03:10

表示没看懂

lzspain · 发表于 2024-3-20 12:55:50

只能膜拜大佬！

e2002 · 发表于 2024-3-21 16:12:30

我们实际工作中，通常对于这种多个文件互相参考的时候，基本还是直接tile显示全部打开的文档。如果打开的文件数量较多，确实想要一下就找到自己需要查看的那个文档是不太可能的。

所以在机器能带动的情况下，外部参照其他文件是最合适的做法。
多个视口的管理，视口的恢复等，内置的命令在交互上效率是比较低的，所以近年来的版本，在界面上加了 ViewCube， ViewControl等工具。

为了应对工作中的这类需求，之前也写了几个Vports的工具，例如双视口位置同步观察，多视口仿鹰眼，VportConfig快速切换等。

panliang9 · 发表于 2024-3-21 16:24:12

我都是在图纸上加链接，总装、部件、零件一级级的通过图纸编号链接起来。

如果有几张图，相互参照，可以直接插入一张总图来看。

OooCcc · 发表于 2024-3-22 09:34:24

e2002 发表于 2024-3-21 16:12
我们实际工作中，通常对于这种多个文件互相参考的时候，基本还是直接tile显示全部打开的文档。如果打开的文 ...

个人以为还是外部参照比较现实，这里说的技术作为技术文档和实现还是很牛掰的。
但是个人觉得，实际应用时，简单图形还行，如果复杂图形，感觉会更难操作。

外部参照完全可以实现本文所要达到的功能。

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在AutoCAD中多视口展示多张图纸(AutoCAD2018及以上版本可用)

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