探讨直角折线的算法

<STRONG>探讨直角折线的算法<BR></STRONG>
<P>现在我可以实现MAPBASIC的TOOLbutton工具画折线</P>
<P>但是现在不知道怎样画出直角直线</P>
<P>敬请高人指点</P>


<P><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" /></P>
<img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" />

<P>你哪个软件的我真不知道了</P>
<P>不过写下去也就是算的斜率的东西了，</P>