[ARX]利用AutoCAD 2005.NET API进行AutoCAD的二次开发(三)
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT face=宋体>利用AutoCAD 2005.NET API进行AutoCAD的二次开发(三)</FONT><P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> --圆</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT face=宋体><SPAN style="mso-tab-count: 1"> 大家好!今天讲的内容是圆。对于在程序中加入相应的命名空间和一些前期的准备工作,请大家参考“利用AutoCAD 2005.NET API进行AutoCAD的二次开发(一)”。不要再另外创建新的工程,直接在“利用AutoCAD 2005.NET API进行AutoCAD的二次开发(一)” 创建的工程中加入相应的函数,这样可以创建一个自己的底层函数库。下面是编程的具体步骤:</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo3; tab-stops: list 39.0pt"><FONT face=宋体>(1)</FONT><SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN><FONT face=宋体>创建圆的基准函数(AddCircle)。其实现的步骤如下:</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体>public Circle AddCircle(Point3d center, double radius)</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Circle circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> try</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Initialize();</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle = new Circle();</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle.Center = center;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle.Radius = radius;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> AddEntity(circle);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> finally</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> DisposeAll();</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT face=宋体>其中,Initialize、AddEntity 、DisposeAll是为了简化编程工作而自定义的函数,请大家参考“利用AutoCAD 2005.NET API进行AutoCAD的二次开发(一)”。</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo3; tab-stops: list 39.0pt"><FONT face=宋体>(2)</FONT><SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN><FONT face=宋体>已知圆心和直径创建圆。</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体>public Circle AddCircleD(Point3d center, double diameter)</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Circle circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle = AddCircle(center, diameter / 2.0);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN style="mso-tab-count: 1"><FONT face=宋体> </FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>(3) 两点法创建圆。</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> public Circle AddCircle(Point3d pt1, Point3d pt2)</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Circle circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Point3d center;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> double diameter;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-tab-count: 2"> //获取圆心位置</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> center.X = (pt1.X + pt2.X) / 2;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> center.Y = (pt1.Y + pt2.Y) / 2;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> center.Z = (pt1.Z + pt2.Z) / 2;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> diameter = Math.Sqrt((pt2.X - pt1.X) * (pt2.X - pt1.X) + (pt2.Y - pt1.Y) * (pt2.Y - pt1.Y));//获取直径</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle = AddCircleD(center, diameter);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体>(4)三点法创建圆。关于三点法创建圆的理论请参考明经通道出版的《AutoCAD VBA 开发精彩实例教程》。</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体>public Circle AddCircle(Point3d pt1, Point3d pt2, Point3d pt3)</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> double xysm, xyse, xy;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Point3d center;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> double radius;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Circle circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> xy = pt1.X * pt1.X + pt1.Y * pt1.Y;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> xyse = xy - pt3.X * pt3.X - pt3.Y * pt3.Y;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> xysm = xy - pt2.X * pt2.X - pt2.Y * pt2.Y;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 63pt"><FONT face=宋体>xy = (pt1.X - pt2.X) * (pt1.Y - pt3.Y) - (pt1.X - pt3.X) * (pt1.Y - pt2.Y);</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 63pt"><FONT face=宋体>//判断参数有效性</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> if (Math.Abs(xy) < 0.000001)</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> CommandLinePrompts.Message("\n所输入的参数无法创建图形!");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle = null;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> else</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 63pt"><FONT face=宋体>{</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 63pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> //获取圆心</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> center.X = (xysm * (pt1.Y - pt3.Y) - xyse * (pt1.Y - pt2.Y)) / (2 * xy);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> center.Y = (xyse * (pt1.X - pt2.X) - xysm * (pt1.X - pt3.X)) / (2 * xy);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> center.Z = 0;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> radius = Math.Sqrt((pt1.X - center.X) * (pt1.X - center.X) + ((pt1.Y - center.Y) * (pt1.Y - center.Y)));//获取半径</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> if (radius < 0.000001)</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> CommandLinePrompts.Message("半径过小!");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle = null;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> else</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> circle = AddCircle(center, radius);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体> <o:p></o:p></FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体> <o:p></o:p></FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return circle;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt 21pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> (5)添加测试代码,请创建一新的类库工程,然后加入以下代码:</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>#region Using directives</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体> <o:p></o:p></FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using System;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using Autodesk.AutoCAD.ApplicationServices;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using Autodesk.AutoCAD.DatabaseServices;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using Autodesk.AutoCAD.Geometry;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using Autodesk.AutoCAD.Runtime;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using DBTransMan = Autodesk.AutoCAD.DatabaseServices.TransactionManager;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>using ZHFArxLibrary;</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体> <o:p></o:p></FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>#endregion</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体> <o:p></o:p></FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>namespace ClassLibrary1</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>{</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> public class Class1</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> public Class1()</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><SPAN style="mso-spacerun: yes"><FONT face=宋体> </FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> </FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> public static void AddCircle()</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Arx arx = new Arx();</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Point3d pt1, pt2, pt3;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> double radius;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt1 = arx.GetPoint("\n指定圆心:");//自定义函数函数接受用户输入</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> radius = arx.GetReal("\n输入半径:");//自定义函数函数接受用户输入</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> arx.AddCircle(pt1, radius);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt1 = arx.GetPoint("\n指定圆心:");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> radius = arx.GetReal("\n输入直径:");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> arx.AddCircleD(pt1, radius);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt1 = arx.GetPoint("\n输入第一点:");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt2 = arx.GetPoint(pt1, "\n输入第二点:");//自定义函数函数接受用户输入</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> arx.AddCircle(pt1, pt2);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt1 = arx.GetPoint("\n输入第一点:");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt2 = arx.GetPoint(pt1, "\n输入第二点:");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> pt3 = arx.GetPoint(pt2, "\n输入第三点:");</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> arx.AddCircle(pt1, pt2, pt3);//三点法创建圆</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>}</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>由于AutoCAD 2005.NET API没有接受用户输入的相关函数,所以只能通过自定义函数来解决。请在创建底层函数库的工程(就是创建直线、圆等的那个工程)中加入以下自定义函数:</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>//在AutoCAD中获取用鼠标点取的点,输入参数是参照点pt,命令行提示prompt</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>public Point3d GetPoint(Point3d pt, string prompt)</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> double[] d = new double;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> d = pt.X;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> d = pt.Y;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> d = pt.Z;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Array a = (Array)((AcadApplication)Application.AcadApplication).ActiveDocument.Utility.GetPoint(d, prompt);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Point3d point = new Point3d();</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> point.X = (double)a.GetValue(0);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> point.Y = (double)a.GetValue(1);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> point.Z = (double)a.GetValue(2);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return point;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>//在AutoCAD中获取用鼠标点取的点,输入参数是命令行提示prompt</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>public Point3d GetPoint(string prompt)</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Array a = (Array)((AcadApplication)Application.AcadApplication).ActiveDocument.Utility.GetPoint(Type.Missing, prompt);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> Point3d point = new Point3d();</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> point.X = (double)a.GetValue(0);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> point.Y = (double)a.GetValue(1);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> point.Z = (double)a.GetValue(2);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return point;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>//在AutoCAD中获取用户在命令行中输入的实数,输入参数是命令行提示prompt</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> public double GetReal(string prompt)</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> {</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> double d = ((AcadApplication)Application.AcadApplication).ActiveDocument.Utility.GetReal(prompt);</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> return d;</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体><SPAN style="mso-spacerun: yes"> }</FONT></SPAN>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>把(5)中的工程编译。然后启动AutoCAD,在命令行中键入netload命令,在弹出的对话框中选择刚编译好的dll文件。在命令行中键入AddCircle(就是你在(8)中声明的AutoCAD .NET命令),然后根据相应的命令行提示进行操作,可以在AutoCAD中用4种不同的方法画出4个圆。</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体>(6)完整的程序代码请看下面的附件。</FONT>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><FONT face=宋体> <o:p></o:p></FONT>
版主,能否介绍一下如何使用AutoCAD 2005.NET API的事件反应器,具体的说,我想知道能否自定义autocad的双击事件。 同意楼上的,偶也想学学 AutoCAD 2005.NET API已没有事件发生器(这是C++的概念),而用事件来代替。具体的情况我也不是非常清楚。 tongyi 妙,妙,妙!!!这几天学了一下,真的很方便,感觉学习质料少了点,API函数说明找不到啊,请楼主加油为我等推荐更多更好的学习资料啊,谢谢!
补充一下:这个编程只能在autocad2006下,2005好多函数不支持. 这些东西,2004能用不? <P>诶,关于这方面的资料还真少啊。 </P>
<P> </P> <p>谁有用vb.net 编写objectARX 的资料</p><p></p> Net最基本的操作还在入门,所以还看不会作业
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