Pycomcad中的过滤机制及访问引用块内对象简述

1.过滤机制

所谓过滤机制，就是选择集的规则，过滤器列表由成对的参数组成。第一个参数标识过滤器的类型（例如对象），第二个参数指定要过滤的值（例如圆）。过滤器类型是指定使用哪种过滤器的 DXF 组码。

有关 DXF 组码的完整列表，请参见《DXF 参考手册》中的“组码值类型”(https://github.com/JohnYang1210/PycomCAD ，欢迎各位老铁star,pullrequest）

• 过滤器列表可以是单个条件，也可以是多个条件，过滤器列表中的符号名称和字符串还可以包含通配符模式。

1.1 过滤器参数

滤器参数均为数组，在Pycomcad中需要使用VtInt和VtVariant函数进行转换， 过滤器类型为整数（VtInt转换），过滤器值为变量（VtVariant转换）。每个过滤器类型都必须与过滤器值成对相应出现。

• 如：
  
  ft=[0] # 过滤器是对象类型
  
  ft=VtInt(ft) #对过滤器进行转换
  
  fd=['Circle'] # 过滤器值为圆
  
  fd=VtVariant(fd) #过滤器值转换

---

• 以上是单个条件，下面是两个条件：
  
  ft=[0,8]
  
  ft=VtInt(ft)
  
  fd=['Circle','0']
  
  fd=VtVariant(fd)
  
  这样选择的是位于'0'图层上的圆

1.2增加过滤器的复杂程度

如果指定多个选择条件，AutoCAD 将假设选定对象必须符合所有条件。但用户可以按照其他方式来指定条件。对于数字项，用户可以指定关系运算（例如，圆的半径必须大于或等于 5.0）； 对于所有项，用户可以指定逻辑运算（例如 Text 或 Mtext）。

• （1）使用 -4 DXF 组码来指示过滤器规格中的关系运算符。以字符串的形式来指定运算符。
  
  

• （2）过滤器列表中的逻辑运算符也由 -4 组代码表示，运算符为字符串，但必须组对。运算符以小于号开始 (<)，以大于号结束 (>)。下表列出了可以在选择集过滤中使用的逻辑运算符
  
  

• 如：
  
  ft=[0,-4,40,8]
  
  ft=VtInt(ft)
  
  fd=['Circle','>=',5,'0']
  
  fd=VtVariant(fd)
  
  这个选择的是位于'0'图层上所有半径大于等于5的圆。

---

对于逻辑关系：

ft=[-4,0,0，-4]

ft=VtInt(ft)

fd=['<or','TEXT','MTEXT','or>']

fd=VtVariant(fd)

这个选择是选择单行文字或者多行文字

1.3 在选择集过滤器条件中使用通配符模式

• 如：
  
  ft=vtInt([0,1]) # 1-->图元的主要文字值
  
  fd=VtVariant(['MTEXT',' * THE * '])
  
  选择的是所有文字字符串中出现“The”的多行文字

---

• 如：
  
  ft=VtInt([100,2]) # 100-->子类标记,2-->块名称
  
  fd=VtVariant['AcDbBlockReference','~'] #子类标记名为AcDbBlockReference，即引用块。_{是匹配后面之外的所有值，只有一个'}'，即包含了所有非空名称的引用块

1.4创建选择集并进行选择

在Pycomcad中，用slt=acad.GetSelectionSets(str)来进行创建，这里需要注意的有几点：（1）创建完后，经过使用后，最好最后都对slt进行释放（slt.Delete()），否则当一个dwg文件没有被关掉再打开的情况下，创建之前名字（str）的选择集是不被允许的，要报错。（2）slt有几种选择的方法,slt.Select,slt.SelectAtPoint,slt.SelectByPolygon,slt.SelectOnScreen等，这里不在赘述，源码中可见。

2引用块内对象访问

目前若要访问块内对象，主要将块炸开，然后炸开后返回组成该块的所有对象元组，需要注意的是，在选择集选中的块对象是块引用对象，与块对象是公用了一个Handle，但不是同一个对象。对于块引用对象，没有Explode方法，所以需要调用acad.Handle2Object方法来得到块对象。

---

下面是上述内容的一个例子：

import sys

sys.path.append(r'G:\PycharmProject\PycomCAD\PycomCAD')

from pycomcad import *

acad=Autocad()

acad.CurrentFilename

'Drawing1.dwg'

acad.IsEarlyBind

True

# acad.TurnOnEarlyBind()

ft=[100,2]

ft=VtInt(ft)

fd=['AcDbBlockReference','~']

fd=VtVariant(fd)

slt=acad.GetSelectionSets('slt11111')

slt.SelectOnScreen(ft,fd)   #屏幕选择，只选择块

slt.Count

7

slt.Item(0).Highlight(True)# 高亮第一个块引用对象

help(slt.Item(0))

Help on IAcadEntity in module win32com.gen_py.4E3F492A-FB57-4439-9BF0-1567ED84A3A9x0x1x0 object:

class IAcadEntity(win32com.client.DispatchBaseClass)
 |  IAcadEntity(oobj=None)
 |
 |  AutoCAD Entity Interface
 |
 |  Method resolution order:
 |      IAcadEntity
 |      win32com.client.DispatchBaseClass
 |      builtins.object
 |
 |  Methods defined here:
 |
 |  ArrayPolar(self, NumberOfObjects=<PyOleEmpty object at 0x000002B333A49150>, AngleToFill=<PyOleEmpty object at 0x000002B333A49150>, CenterPoint=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an array of selected objects in a polar pattern.
 |
 |  ArrayRectangular(self, NumberOfRows=<PyOleEmpty object at 0x000002B333A49150>, NumberOfColumns=<PyOleEmpty object at 0x000002B333A49150>, NumberOfLevels=<PyOleEmpty object at 0x000002B333A49150>, DistBetweenRows=<PyOleEmpty object at 0x000002B333A49150>, DistBetweenCols=<PyOleEmpty object at 0x000002B333A49150>, DistBetweenLevels=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an array of selected objects in a rectangular pattern.
 |
 |  Copy(self)
 |      Copies the entity object.
 |
 |  Delete(self)
 |      Deletes a specified object
 |
 |  Erase(self)
 |      Erases all the objects in a selection set
 |
 |  GetBoundingBox(self, MinPoint=<PyOleMissing object at 0x000002B333A49390>, MaxPoint=<PyOleMissing object at 0x000002B333A49390>)
 |      Returns the min and max point of the bounding box of the entity object.
 |
 |  GetExtensionDictionary(self)
 |      Gets the extension dictionary associated with an object
 |
 |  GetXData(self, AppName=<PyOleEmpty object at 0x000002B333A49150>, XDataType=<PyOleMissing object at 0x000002B333A49390>, XDataValue=<PyOleMissing object at 0x000002B333A49390>)
 |      Gets the extended data (XData) associated with an object
 |
 |  Highlight(self, HighlightFlag=<PyOleEmpty object at 0x000002B333A49150>)
 |      Highlights the entity object.
 |
 |  IntersectWith(self, IntersectObject=<PyOleEmpty object at 0x000002B333A49150>, option=<PyOleEmpty object at 0x000002B333A49150>)
 |      Intersects with the input entity object.
 |
 |  Mirror(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>)
 |      Mirrors selected objects about a line.
 |
 |  Mirror3D(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>, point3=<PyOleEmpty object at 0x000002B333A49150>)
 |      Mirrors selected objects about a plane defined by three points.
 |
 |  Move(self, FromPoint=<PyOleEmpty object at 0x000002B333A49150>, ToPoint=<PyOleEmpty object at 0x000002B333A49150>)
 |      Moves the entity object from source to destination.
 |
 |  Rotate(self, BasePoint=<PyOleEmpty object at 0x000002B333A49150>, RotationAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Rotates the entity object about a point.
 |
 |  Rotate3D(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>, RotationAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Rotates the entity object about a 3D line.
 |
 |  ScaleEntity(self, BasePoint=<PyOleEmpty object at 0x000002B333A49150>, ScaleFactor=<PyOleEmpty object at 0x000002B333A49150>)
 |      Scale the entity object with respect to the base point and the scale factor.
 |
 |  SetXData(self, XDataType=<PyOleEmpty object at 0x000002B333A49150>, XDataValue=<PyOleEmpty object at 0x000002B333A49150>)
 |      Sets the extended data (XData) associated with an object
 |
 |  TransformBy(self, TransformationMatrix=<PyOleEmpty object at 0x000002B333A49150>)
 |      Performs the specified transformation on the entity object.
 |
 |  Update(self)
 |      Updates the graphics of the entity object.
 |
 |  __iter__(self)
 |      Return a Python iterator for this object
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |
 |  CLSID = IID('{B58808B5-37AC-431F-BA80-A8D381BB4C5C}')
 |
 |  coclass_clsid = IID('{571498B7-54A9-409E-9B06-9DD7DBC7E0BD}')
 |
 |  ----------------------------------------------------------------------
 |  Methods inherited from win32com.client.DispatchBaseClass:
 |
 |  __eq__(self, other)
 |      Return self==value.
 |
 |  __getattr__(self, attr)
 |
 |  __init__(self, oobj=None)
 |      Initialize self.  See help(type(self)) for accurate signature.
 |
 |  __ne__(self, other)
 |      Return self!=value.
 |
 |  __repr__(self)
 |      Return repr(self).
 |
 |  __setattr__(self, attr, value)
 |      Implement setattr(self, name, value).
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from win32com.client.DispatchBaseClass:
 |
 |  __dict__
 |      dictionary for instance variables (if defined)
 |
 |  __weakref__
 |      list of weak references to the object (if defined)
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes inherited from win32com.client.DispatchBaseClass:
 |
 |  __hash__ = None

slt.Item(0).GetBoundingBox()

((3671.238929877034, -1710.2902729521002, -1e-08),
 (5127.713260427801, -850.7467697963812, 1e-08))

slt.Item(0).HasExtensionDictionary

True

blk=acad.acad.ActiveDocument.ActiveLayout.Block

help(blk)

Help on IAcadBlock in module win32com.gen_py.4E3F492A-FB57-4439-9BF0-1567ED84A3A9x0x1x0 object:

class IAcadBlock(win32com.client.DispatchBaseClass)
 |  IAcadBlock(oobj=None)
 |
 |  A block definition containing a name and a set of objects
 |
 |  Method resolution order:
 |      IAcadBlock
 |      win32com.client.DispatchBaseClass
 |      builtins.object
 |
 |  Methods defined here:
 |
 |  Add3DFace(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>, point3=<PyOleEmpty object at 0x000002B333A49150>, Point4=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3DFace object given four vertices
 |
 |  Add3DMesh(self, M=<PyOleEmpty object at 0x000002B333A49150>, N=<PyOleEmpty object at 0x000002B333A49150>, PointsMatrix=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a free-form 3D mesh, given the number of points in the M and N directions and the coordinates of the points in the M and N directions
 |
 |  Add3DPoly(self, PointsArray=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3D polyline from the given array of coordinates
 |
 |  AddArc(self, Center=<PyOleEmpty object at 0x000002B333A49150>, Radius=<PyOleEmpty object at 0x000002B333A49150>, StartAngle=<PyOleEmpty object at 0x000002B333A49150>, EndAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an arc given the center, radius, start angle, and end angle of the arc
 |
 |  AddAttribute(self, Height=<PyOleEmpty object at 0x000002B333A49150>, Mode=<PyOleEmpty object at 0x000002B333A49150>, Prompt=<PyOleEmpty object at 0x000002B333A49150>, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Tag=<PyOleEmpty object at 0x000002B333A49150>, Value=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an attribute definition at the given location with the specified properties
 |
 |  AddBox(self, Origin=<PyOleEmpty object at 0x000002B333A49150>, Length=<PyOleEmpty object at 0x000002B333A49150>, Width=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3D solid box with edges parallel to the axes of the WCS
 |
 |  AddCircle(self, Center=<PyOleEmpty object at 0x000002B333A49150>, Radius=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a circle given a center point and radius
 |
 |  AddCone(self, Center=<PyOleEmpty object at 0x000002B333A49150>, BaseRadius=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3D solid cone with the base on the XY plane of the WCS
 |
 |  AddCustomObject(self, ClassName=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a Custom object
 |
 |  AddCylinder(self, Center=<PyOleEmpty object at 0x000002B333A49150>, Radius=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3D solid cylinder whose base is on the XY plane of the WCS
 |
 |  AddDim3PointAngular(self, AngleVertex=<PyOleEmpty object at 0x000002B333A49150>, FirstEndPoint=<PyOleEmpty object at 0x000002B333A49150>, SecondEndPoint=<PyOleEmpty object at 0x000002B333A49150>, TextPoint=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an angular dimension for an arc, two lines, or a circle
 |
 |  AddDimAligned(self, ExtLine1Point=<PyOleEmpty object at 0x000002B333A49150>, ExtLine2Point=<PyOleEmpty object at 0x000002B333A49150>, TextPosition=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an aligned dimension object
 |
 |  AddDimAngular(self, AngleVertex=<PyOleEmpty object at 0x000002B333A49150>, FirstEndPoint=<PyOleEmpty object at 0x000002B333A49150>, SecondEndPoint=<PyOleEmpty object at 0x000002B333A49150>, TextPoint=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an angular dimension for an arc, two lines, or a circle
 |
 |  AddDimArc(self, ArcCenter=<PyOleEmpty object at 0x000002B333A49150>, FirstEndPoint=<PyOleEmpty object at 0x000002B333A49150>, SecondEndPoint=<PyOleEmpty object at 0x000002B333A49150>, ArcPoint=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an arc length dimension for an arc
 |
 |  AddDimDiametric(self, ChordPoint=<PyOleEmpty object at 0x000002B333A49150>, FarChordPoint=<PyOleEmpty object at 0x000002B333A49150>, LeaderLength=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a diametric dimension for a circle or arc given the two points on the diameter and the length of the leader line
 |
 |  AddDimOrdinate(self, DefinitionPoint=<PyOleEmpty object at 0x000002B333A49150>, LeaderEndPoint=<PyOleEmpty object at 0x000002B333A49150>, UseXAxis=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an ordinate dimension given the definition point, and leader endpoint
 |
 |  AddDimRadial(self, Center=<PyOleEmpty object at 0x000002B333A49150>, ChordPoint=<PyOleEmpty object at 0x000002B333A49150>, LeaderLength=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a radial dimension for the selected object at the given location
 |
 |  AddDimRadialLarge(self, Center=<PyOleEmpty object at 0x000002B333A49150>, ChordPoint=<PyOleEmpty object at 0x000002B333A49150>, OverrideCenter=<PyOleEmpty object at 0x000002B333A49150>, JogPoint=<PyOleEmpty object at 0x000002B333A49150>, JogAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a jogged radial dimension for an arc, circle, or polyline arc segment
 |
 |  AddDimRotated(self, ExtLine1Point=<PyOleEmpty object at 0x000002B333A49150>, ExtLine2Point=<PyOleEmpty object at 0x000002B333A49150>, DimLineLocation=<PyOleEmpty object at 0x000002B333A49150>, RotationAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a rotated linear dimension
 |
 |  AddEllipse(self, Center=<PyOleEmpty object at 0x000002B333A49150>, MajorAxis=<PyOleEmpty object at 0x000002B333A49150>, RadiusRatio=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an ellipse in the XY plane of the WCS given the center point, a point on the major axis, and the radius ratio
 |
 |  AddEllipticalCone(self, Center=<PyOleEmpty object at 0x000002B333A49150>, MajorRadius=<PyOleEmpty object at 0x000002B333A49150>, MinorRadius=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3D solid elliptical cone on the XY plane of the WCS given the Center, MajorRadius, MinorRadius, and Height
 |
 |  AddEllipticalCylinder(self, Center=<PyOleEmpty object at 0x000002B333A49150>, MajorRadius=<PyOleEmpty object at 0x000002B333A49150>, MinorRadius=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 3D solid elliptical cylinder whose base is on the XY plane of the WCS, given the Center, MajorRadius, MinorRadius, and Height
 |
 |  AddExtrudedSolid(self, Profile=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>, TaperAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an extruded solid given the Profile, Height, and TaperAngle
 |
 |  AddExtrudedSolidAlongPath(self, Profile=<PyOleEmpty object at 0x000002B333A49150>, Path=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an extruded solid given the profile and an extrusion path
 |
 |  AddHatch(self, PatternType=<PyOleEmpty object at 0x000002B333A49150>, PatternName=<PyOleEmpty object at 0x000002B333A49150>, Associativity=<PyOleEmpty object at 0x000002B333A49150>, HatchObjectType=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a Hatch object
 |
 |  AddLeader(self, PointsArray=<PyOleEmpty object at 0x000002B333A49150>, Annotation=<PyOleEmpty object at 0x000002B333A49150>, Type=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a leader line, given the coordinates of the points
 |
 |  AddLightWeightPolyline(self, VerticesList=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a lightweight polyline from a list of vertices
 |
 |  AddLine(self, StartPoint=<PyOleEmpty object at 0x000002B333A49150>, EndPoint=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a line passing through two points
 |
 |  AddMInsertBlock(self, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Name=<PyOleEmpty object at 0x000002B333A49150>, Xscale=<PyOleEmpty object at 0x000002B333A49150>, Yscale=<PyOleEmpty object at 0x000002B333A49150>, Zscale=<PyOleEmpty object at 0x000002B333A49150>, Rotation=<PyOleEmpty object at 0x000002B333A49150>, NumRows=<PyOleEmpty object at 0x000002B333A49150>, NumColumns=<PyOleEmpty object at 0x000002B333A49150>, RowSpacing=<PyOleEmpty object at 0x000002B333A49150>, ColumnSpacing=<PyOleEmpty object at 0x000002B333A49150>, Password=<PyOleEmpty object at 0x000002B333A49150>)
 |      Inserts an array of blocks
 |
 |  AddMLeader(self, PointsArray=<PyOleEmpty object at 0x000002B333A49150>, leaderLineIndex=<PyOleMissing object at 0x000002B333A49390>)
 |      Creates a multileader
 |
 |  AddMLine(self, VertexList=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a polyface mesh from a list of vertices
 |
 |  AddMText(self, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Width=<PyOleEmpty object at 0x000002B333A49150>, Text=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an MText entity in a rectangle defined by the insertion point and width of the bounding box
 |
 |  AddPoint(self, Point=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a Point object at a given location
 |
 |  AddPolyfaceMesh(self, VertexList=<PyOleEmpty object at 0x000002B333A49150>, FaceList=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a polyface mesh from a list of vertices
 |
 |  AddPolyline(self, VerticesList=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a polyline from a list of vertices
 |
 |  AddRaster(self, imageFileName=<PyOleEmpty object at 0x000002B333A49150>, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, ScaleFactor=<PyOleEmpty object at 0x000002B333A49150>, RotationAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a new raster image based on an existing image file
 |
 |  AddRay(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a ray passing through two unique points
 |
 |  AddRegion(self, ObjectList=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a region from a set of entities. The given entities must form a closed coplanar region
 |
 |  AddRevolvedSolid(self, Profile=<PyOleEmpty object at 0x000002B333A49150>, AxisPoint=<PyOleEmpty object at 0x000002B333A49150>, AxisDir=<PyOleEmpty object at 0x000002B333A49150>, Angle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a revolved solid, given the region around an axis
 |
 |  AddSection(self, FromPoint=<PyOleEmpty object at 0x000002B333A49150>, ToPoint=<PyOleEmpty object at 0x000002B333A49150>, planeVector=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a section plane
 |
 |  AddShape(self, Name=<PyOleEmpty object at 0x000002B333A49150>, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, ScaleFactor=<PyOleEmpty object at 0x000002B333A49150>, RotationAngle=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a Shape object based on a template identified by name, at the given insertion point, scale factor, and rotation
 |
 |  AddSolid(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>, point3=<PyOleEmpty object at 0x000002B333A49150>, Point4=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a 2D solid polygon
 |
 |  AddSphere(self, Center=<PyOleEmpty object at 0x000002B333A49150>, Radius=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a sphere given the center and radius
 |
 |  AddSpline(self, PointsArray=<PyOleEmpty object at 0x000002B333A49150>, StartTangent=<PyOleEmpty object at 0x000002B333A49150>, EndTangent=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a quadratic or cubic NURBS (nonuniform rational B-spline) curve
 |
 |  AddTable(self, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, NumRows=<PyOleEmpty object at 0x000002B333A49150>, NumColumns=<PyOleEmpty object at 0x000002B333A49150>, RowHeight=<PyOleEmpty object at 0x000002B333A49150>, ColWidth=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a table at the given insertion point, given the number of rows, number of columns, row height and column width
 |
 |  AddText(self, TextString=<PyOleEmpty object at 0x000002B333A49150>, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a single line of text
 |
 |  AddTolerance(self, Text=<PyOleEmpty object at 0x000002B333A49150>, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Direction=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a tolerance entity
 |
 |  AddTorus(self, Center=<PyOleEmpty object at 0x000002B333A49150>, TorusRadius=<PyOleEmpty object at 0x000002B333A49150>, TubeRadius=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a torus at the given location
 |
 |  AddTrace(self, PointsArray=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a Trace object from an array of points
 |
 |  AddWedge(self, Center=<PyOleEmpty object at 0x000002B333A49150>, Length=<PyOleEmpty object at 0x000002B333A49150>, Width=<PyOleEmpty object at 0x000002B333A49150>, Height=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates a wedge with edges parallel to the axes given the length, width, and height
 |
 |  AddXline(self, Point1=<PyOleEmpty object at 0x000002B333A49150>, Point2=<PyOleEmpty object at 0x000002B333A49150>)
 |      Creates an xline (an infinite line) passing through two specified points
 |
 |  AttachExternalReference(self, PathName=<PyOleEmpty object at 0x000002B333A49150>, Name=<PyOleEmpty object at 0x000002B333A49150>, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Xscale=<PyOleEmpty object at 0x000002B333A49150>, Yscale=<PyOleEmpty object at 0x000002B333A49150>, Zscale=<PyOleEmpty object at 0x000002B333A49150>, Rotation=<PyOleEmpty object at 0x000002B333A49150>, bOverlay=<PyOleEmpty object at 0x000002B333A49150>, Password=<PyOleEmpty object at 0x000002B333A49150>)
 |      Attaches an external reference (xref) to the drawing
 |
 |  Bind(self, bPrefixName=<PyOleEmpty object at 0x000002B333A49150>)
 |      Binds an external reference (xref) to a drawing
 |
 |  Delete(self)
 |      Deletes a specified object
 |
 |  Detach(self)
 |      Detachs an external reference (xref) from a drawing
 |
 |  Erase(self)
 |      Erases all the objects in a selection set
 |
 |  GetExtensionDictionary(self)
 |      Gets the extension dictionary associated with an object
 |
 |  GetXData(self, AppName=<PyOleEmpty object at 0x000002B333A49150>, XDataType=<PyOleMissing object at 0x000002B333A49390>, XDataValue=<PyOleMissing object at 0x000002B333A49390>)
 |      Gets the extended data (XData) associated with an object
 |
 |  InsertBlock(self, InsertionPoint=<PyOleEmpty object at 0x000002B333A49150>, Name=<PyOleEmpty object at 0x000002B333A49150>, Xscale=<PyOleEmpty object at 0x000002B333A49150>, Yscale=<PyOleEmpty object at 0x000002B333A49150>, Zscale=<PyOleEmpty object at 0x000002B333A49150>, Rotation=<PyOleEmpty object at 0x000002B333A49150>, Password=<PyOleEmpty object at 0x000002B333A49150>)
 |      Inserts a drawing file or a named block that has been defined in the current drawing
 |
 |  Item(self, Index=<PyOleEmpty object at 0x000002B333A49150>)
 |      Gets the member object at a given index in a collection, group, or selection set
 |
 |  Reload(self)
 |      Reloads the external reference (xref)
 |
 |  SetXData(self, XDataType=<PyOleEmpty object at 0x000002B333A49150>, XDataValue=<PyOleEmpty object at 0x000002B333A49150>)
 |      Sets the extended data (XData) associated with an object
 |
 |  Unload(self)
 |      Unloads the menu group or external reference
 |
 |  __call__(self, Index=<PyOleEmpty object at 0x000002B333A49150>)
 |      Gets the member object at a given index in a collection, group, or selection set
 |
 |  __int__(self, *args)
 |
 |  __iter__(self)
 |      Return a Python iterator for this object
 |
 |  __len__(self)
 |      #This class has Count() property - allow len(ob) to provide this
 |
 |  __nonzero__(self)
 |      #This class has a __len__ - this is needed so 'if object:' always returns TRUE.
 |
 |  __str__(self, *args)
 |      Return str(self).
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |
 |  CLSID = IID('{D113FB37-DE17-4644-8540-B2D35F1272FB}')
 |
 |  coclass_clsid = IID('{9519F17C-24D4-40BE-8A6F-639B0EF82DA0}')
 |
 |  ----------------------------------------------------------------------
 |  Methods inherited from win32com.client.DispatchBaseClass:
 |
 |  __eq__(self, other)
 |      Return self==value.
 |
 |  __getattr__(self, attr)
 |
 |  __init__(self, oobj=None)
 |      Initialize self.  See help(type(self)) for accurate signature.
 |
 |  __ne__(self, other)
 |      Return self!=value.
 |
 |  __repr__(self)
 |      Return repr(self).
 |
 |  __setattr__(self, attr, value)
 |      Implement setattr(self, name, value).
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from win32com.client.DispatchBaseClass:
 |
 |  __dict__
 |      dictionary for instance variables (if defined)
 |
 |  __weakref__
 |      list of weak references to the object (if defined)
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes inherited from win32com.client.DispatchBaseClass:
 |
 |  __hash__ = None

blk.Count

21

blk.IsXRef

False

blk.Name

'*Model_Space'

blk.GetXData

<bound method IAcadBlock.GetXData of <win32com.gen_py.AutoCAD 2016 Type Library.IAcadBlock instance at 0x2968727170744>>

slt.Item(0).Handle

'288'

explode=acad.Handle2Object(slt.Item(1).Handle).Explode()

explode

(<win32com.gen_py.AutoCAD 2016 Type Library.IAcadLWPolyline instance at 0x2968734182648>,
 <win32com.gen_py.AutoCAD 2016 Type Library.IAcadCircle instance at 0x2968734182704>,
 <win32com.gen_py.AutoCAD 2016 Type Library.IAcadText instance at 0x2968734182760>)

explode[2].TextString

'demo2'

slt.Item(2).ObjectID

140696309747552

acad.ObjectID2Object(slt.Item(2).ObjectID)

---------------------------------------------------------------------------

AttributeError                            Traceback (most recent call last)

<ipython-input-30-c229de50f3fb> in <module>()
----> 1 acad.ObjectID2Object(slt.Item(2).ObjectID)

G:\PycharmProject\PycomCAD\PycomCAD\pycomcad.py in ObjectID2Object(self, ID)
    497                 return the object of specified ID
    498 		"""
--> 499                 return self.acad.ActiveDocument.ObjectIDToObject(ID)
    500
    501         def GetEntityByItem(self,i):

D:\Anaconda\lib\site-packages\win32com\client\__init__.py in __getattr__(self, attr)
    471                 args=self._prop_map_get_.get(attr)
    472                 if args is None:
--> 473                         raise AttributeError("'%s' object has no attribute '%s'" % (repr(self), attr))
    474                 return self._ApplyTypes_(*args)
    475 

AttributeError: '<win32com.gen_py.AutoCAD 2016 Type Library.IAcadDocument instance at 0x2968734181360>' object has no attribute 'ObjectIDToObject'

import win32com.client

win32com.client.constants.acSelectionSetAll

5

ss=acad.GetSelectionSets('ss')

ss.Select(5,ft,fd)

ss.Count

24

acad.Handle2Object(slt.Item(3).Handle)==slt.Item(3)

True

acad.Handle2Object(slt.Item(3).Handle) is slt.Item(3)

False

窗口选对象实例

#选择四个点
pnt=acad.GetPoint()
pnt1=acad.GetPoint()
pnt2=acad.GetPoint()
pnt3=acad.GetPoint()
c=list(pnt)+list(pnt1)+list(pnt2)+list(pnt3)

slt=acad.GetSelectionSets('test2')
slt.SelectByPolygon(Mode=win32com.client.constants.acSelectionSetWindowPolygon,PointsList=VtVertex(*c)) #窗口选择，注意PointsList
for i in range(slt.Count):
    ent=acad.Handle2Object(slt.Item(i).Handle)
    print(ent.TextString)

CW Discharge Culvert before Aeration Tank
Plan & Pile Layout For

需要注意的是 使用SelectByPolygon方法时候，需保证PointsList所围成的矩形区域在CAD窗口内可见范围，否则，该方法将失效。