天天课堂 发表于 2009-8-13 09:37:00

打开正交模式，通过输入线段的长度画线

<p>打开正交模式，通过输入线段的长度画线，如图1-10所示。这个练习的目的是使读者掌握使用正交模式画线的方法。<br/><img width="296" height="202" alt="" src="http://www.ttketang.com/home/attachment/200908/13/113_12501265592p6Z.jpg" complete="complete"/><br/>1-10利用正交模式画线<br/>操作范例——使用正交模式画线<br/>1.&nbsp; &nbsp; &nbsp; &nbsp; 画线段AB、BC、CD等，如图1-11所示。<br/>命令:&nbsp;&nbsp;&lt;正交 开&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //打开正交模式<br/>命令: _line 指定第一点:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //单击A点<br/>指定下一点或 [放弃(U)]: 30&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //向右移动光标并输入线段AB的长度<br/>指定下一点或 [放弃(U)]: 12&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //向上移动光标并输入线段BC的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 48&nbsp; &nbsp; &nbsp; &nbsp; //向右移动光标并输入线段CD的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 50&nbsp; &nbsp; &nbsp; &nbsp; //向下移动光标并输入线段DE的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 35&nbsp; &nbsp; &nbsp; &nbsp; //向左移动光标并输入线段EF的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 6&nbsp; &nbsp; &nbsp; &nbsp; //向上移动光标并输入线段FG的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 43&nbsp; &nbsp; &nbsp; &nbsp; //向左移动光标并输入线段GH的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: c&nbsp; &nbsp; &nbsp; &nbsp; //使线框闭合<br/>结果如图1-11所示。<br/><img width="276" height="159" alt="" src="http://www.ttketang.com/home/attachment/200908/13/113_12501265577Vfu.jpg" complete="complete"/><br/>1-11画线段AB、BC等<br/>2.&nbsp; &nbsp; &nbsp; &nbsp; 画线段IJ、JK、KL等，如图1-11所示。<br/>命令: _line 指定第一点: from&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用正交偏移捕捉<br/>基点: int于&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //捕捉交点E<br/>&lt;偏移&gt;: @-10,7&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //输入I点的相对坐标<br/>指定下一点或 [放弃(U)]: 24&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //向上移动光标并输入线段IJ的长度<br/>指定下一点或 [放弃(U)]: 60&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //向左移动光标并输入线段JK的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 16&nbsp; &nbsp; &nbsp; &nbsp; //向下移动光标并输入线段KL的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 44&nbsp; &nbsp; &nbsp; &nbsp; //向右移动光标并输入线段LM的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: 8&nbsp; &nbsp; &nbsp; &nbsp; //向下移动光标并输入线段MN的长度<br/>指定下一点或 [闭合(C)/放弃(U)]: C&nbsp; &nbsp; &nbsp; &nbsp; //使线框闭合<br/>结果如图1-12所示。<br/><img width="228" height="155" alt="" src="http://www.ttketang.com/home/attachment/200908/13/113_1250126559oNHv.jpg" complete="complete"/><br/>1-12画线段IJ、JK等</p><p>本文转载于<a href="http://www.ttketang.com">http://www.ttketang.com</a></p>
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