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    <title>晓东CAD家园-论坛 - A/VLISP</title>
    <link>http://bbs.xdcad.net/forum-265-1.html</link>
    <description>Latest 20 threads of A/VLISP</description>
    <copyright>Copyright(C) 晓东CAD家园-论坛</copyright>
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      <title>晓东CAD家园-论坛</title>
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    <item>
      <title>转换对象数据到扩展实体数据</title>
      <link>http://bbs.xdcad.net/thread-727642-1-1.html</link>
      <description><![CDATA[Converting object data to xdata using AutoLISP 

问题：

Can I use AutoLISP to export object data to XData so that it can be easily read
in a DXF file?

解答：

Yes. The following example is one implementation.  It creates XData under
appname \&quot;MYODLI]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Thu, 04 Feb 2021 06:15:00 +0000</pubDate>
    </item>
    <item>
      <title>通过ActiveX构造LWPOLYLINE</title>
      <link>http://bbs.xdcad.net/thread-727641-1-1.html</link>
      <description><![CDATA[Constructing vlisp lwpolyline via ActiveX 


问题：

Is the method of passing a list of points from ActiveX to addLWPolyline in
AutoCAD 2000 that same way as in AutoCAD R14 using Visual LISP?

The following error occurs when passing a list:
Error: l]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Thu, 04 Feb 2021 00:05:00 +0000</pubDate>
    </item>
    <item>
      <title>在DCL文件中使用UNICODE字符</title>
      <link>http://bbs.xdcad.net/thread-727538-1-1.html</link>
      <description><![CDATA[Using Unicode characters in DCL filesBy Adam NagySome people experienced issues with their DCL files when using them in AutoCAD 2013. Their unicode characters (Cyrillic, Greek, etc.) were not displayed correctly. DCL files by default are saved in ANS ...]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Tue, 26 Jan 2021 10:45:44 +0000</pubDate>
    </item>
    <item>
      <title>删除图中所有图像</title>
      <link>http://bbs.xdcad.net/thread-727537-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Tue, 26 Jan 2021 10:43:56 +0000</pubDate>
    </item>
    <item>
      <title>创建不带annotation 的 leader</title>
      <link>http://bbs.xdcad.net/thread-727440-1-1.html</link>
      <description><![CDATA[Creating a leader without annotation 

问题：

When I create a leader without annotation in Visual LISP with vla-addLeader. I
use NIL for the annotation-parameter but Visual LISP does not accept NIL for the
annotation-object, and VBA permits \&quot;a nothi]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Sat, 16 Jan 2021 13:05:32 +0000</pubDate>
    </item>
    <item>
      <title>利用ARX从AUTOLISP创建匿名组</title>
      <link>http://bbs.xdcad.net/thread-727439-1-1.html</link>
      <description><![CDATA[Create an anonymous group from Visual LISP with help from ARX 

 
 
问题：
DevNote TS36234 describes how to create an anonymous group from VBA, with the
help of an ARX application that was supplied.  Is it possible to call this ARX
application direct]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Sat, 16 Jan 2021 12:44:49 +0000</pubDate>
    </item>
    <item>
      <title>理解AcDbViewport对象组码68的意义</title>
      <link>http://bbs.xdcad.net/thread-727421-1-1.html</link>
      <description><![CDATA[问题：

Understanding group code 68 of AcDbViewport

解答：

Group code 68 represents the viewport status field, and the value is an integer with the following meaning:

0: the viewport is off so that the view within it is not displayed on screen.

N]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Fri, 15 Jan 2021 16:51:19 +0000</pubDate>
    </item>
    <item>
      <title>STARTUP 系统变量和StartUpType 环境变量</title>
      <link>http://bbs.xdcad.net/thread-727420-1-1.html</link>
      <description><![CDATA[问题：

The STARTUP system variable and the StartUpType environment variable

解答：

With the value of the STARTUP system variable set to 0, the user is only given the option of using a template.  If it was set to 1, this would enable a user to 1) s ...]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Fri, 15 Jan 2021 16:49:34 +0000</pubDate>
    </item>
    <item>
      <title>转换3DFACE到POLYLINE</title>
      <link>http://bbs.xdcad.net/thread-727381-1-1.html</link>
      <description><![CDATA[Converting 3dface to a polyline 

问题：

How do I convert 3dFaces to polylines ?

解答：

There\'s no mechanism available to do this directly. What you\'ll need to do is
collect the 3dFace vertex data, and create a polyline using that information.

]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Tue, 12 Jan 2021 18:45:03 +0000</pubDate>
    </item>
    <item>
      <title>LISP构建variant array 和 safearray 数组</title>
      <link>http://bbs.xdcad.net/thread-727380-1-1.html</link>
      <description><![CDATA[Constructing a variant array and safearray in LISP

问题：

Several ActiveX objects require that Arrays be used in LISP, however, I do not
understand how to implement them correctly since they are different from a list.
Is there an example that const .]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Tue, 12 Jan 2021 18:43:30 +0000</pubDate>
    </item>
    <item>
      <title>扩展实体数据，改变注册应用程序的ID</title>
      <link>http://bbs.xdcad.net/thread-727370-1-1.html</link>
      <description><![CDATA[问题：

How to change the registered application ID ?

解答：

In AutoCAD you can attach extended entity data to an entity. The limit on this
data is 16kb per entity. The kinds of data that can be attached are string data
and numeric data. The data  ...]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Tue, 12 Jan 2021 04:56:56 +0000</pubDate>
    </item>
    <item>
      <title>API可以识别拓扑中的孤岛吗？</title>
      <link>http://bbs.xdcad.net/thread-727368-1-1.html</link>
      <description><![CDATA[ID    31245 
 Applies to:    AutoCAD Map 3

 Date    12/10/2001 

This document is part of   Visual Lisp   Autodesk MAP DevNotes   MAP Topology   Topology Lisp   


问题：Can API identify islands in topology? 

I have a problem in managing the link]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Tue, 12 Jan 2021 04:48:37 +0000</pubDate>
    </item>
    <item>
      <title>计算和生成椭圆弧</title>
      <link>http://bbs.xdcad.net/thread-727367-1-1.html</link>
      <description><![CDATA[本文献详解了椭圆弧的数据的含义及如何计算和生成

问题：
Calculate and entmake elliptical arcs (with LISP sample) 

解答：
ical arcs, group code 41 is described as the \&quot;start parameter\&quot;.
However, its association with known values for the arc is diffic ...]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Tue, 12 Jan 2021 04:46:36 +0000</pubDate>
    </item>
    <item>
      <title>Bind-as-Insert, using Visual LISP?</title>
      <link>http://bbs.xdcad.net/thread-727364-1-1.html</link>
      <description><![CDATA[问题：
How to perform a bind-as-insert an Xref, using Visual LISP?

解答：
In AutoCAD , the BINDTYPE system variable was introduced.  By setting it
to 1, a bind-as-insert is performed:


(setvar \&quot;BINDTYPE\&quot; 1)
(command \&quot;_-xref\&quot; \&quot;_bind\&quot; \&quot;MYBLOCK\&quot;]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Mon, 11 Jan 2021 17:40:43 +0000</pubDate>
    </item>
    <item>
      <title>AutoLISP fix function returns incorrect integer</title>
      <link>http://bbs.xdcad.net/thread-727363-1-1.html</link>
      <description><![CDATA[问题：
Why does the AutoLISP Fix function sometimes return the wrong results?

When I get the Z coordinate of a lwpolyline vertex and then fix it to the
nearest integer, it occasionally returns the wrong results. To illustrate this,
if the returned  ...]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Mon, 11 Jan 2021 17:38:25 +0000</pubDate>
    </item>
    <item>
      <title>AutoLISP error does not produce command line list dump</title>
      <link>http://bbs.xdcad.net/thread-727362-1-1.html</link>
      <description><![CDATA[问题：
How can I determine in which line of AutoLISP code an error exists?

解答：
In previous versions of AutoLISP and Visual LISP (VLISP), when an AutoLISP
function terminated unexpectedly in the drawing editor, the entire expression
would display ...]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Mon, 11 Jan 2021 17:33:17 +0000</pubDate>
    </item>
    <item>
      <title>Attribute dialog does not display when using the -INSERT Command function</title>
      <link>http://bbs.xdcad.net/thread-727361-1-1.html</link>
      <description><![CDATA[问题：
I use the -INSERT command with the command function and if the block has attributes, the Enter Attributes dialog should be displayed allowing you to fill in the attributes. In some cases the dialog box is not displayed.

解答：
If ATTDIA is s ...]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Mon, 11 Jan 2021 16:25:28 +0000</pubDate>
    </item>
    <item>
      <title>Attaching hyperlink urls to entities</title>
      <link>http://bbs.xdcad.net/thread-727360-1-1.html</link>
      <description><![CDATA[问题：
How do I programmatically attach a URL (hyperlink) to an entity in AutoCAD

解答：
New classes of type AcDbHyperlink*** allow a program to associate URLs with an
entity. An equivalent Automation API is also available in AutoCAD 2000.

You can ...]]></description>
      <category>A/VLISP</category>
      <author>XDSoft</author>
      <pubDate>Mon, 11 Jan 2021 16:23:31 +0000</pubDate>
    </item>
    <item>
      <title>atof does not return the complete number of the input string</title>
      <link>http://bbs.xdcad.net/thread-727342-1-1.html</link>
      <description><![CDATA[问题：
I am trying to convert a string in lisp to a real number using atof and the
number is truncated. Is there a way to get the complete number?

Command: (atof \&quot;1234.34456\&quot;)
1234.34


解答：
The number is not rounded off internally. The number di]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Mon, 11 Jan 2021 12:18:26 +0000</pubDate>
    </item>
    <item>
      <title>ARX function exposure within a separate namespace VLX</title>
      <link>http://bbs.xdcad.net/thread-727341-1-1.html</link>
      <description><![CDATA[问题：
I built a separate namespace vlx from firstasi.lsp, but I cannot connect to
the database with the functions in the loaded asilisp.arx. Why?

解答：
In order to expose a function defined in a loaded ARX application to AutoLISP
code contained i ...]]></description>
      <category>A/VLISP</category>
      <author>newer</author>
      <pubDate>Mon, 11 Jan 2021 12:15:53 +0000</pubDate>
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