📄 在液晶上画斜线的程序.htm
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<td width="65%"><STRONG>在液晶上画斜线的程序</STRONG></td>
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<td class=main_ArticleTitle style="WORD-BREAK: break-all" colSpan=2 height=50>在液晶上画斜线的程序</td>
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<td class=Article_tdbgall colSpan=2>作者：<a href='/ShowAuthor.asp?ChannelID=1005&AuthorName=61IC录入' title='61IC录入'>61IC录入</a> 文章来源：本站原创 点击数：<script language='javascript' src='/MCU/GetHits.asp?ArticleID=3268'></script> 更新时间：2006-4-7 <A title=收藏的网页将被永久地保存到新浪ViVi收藏夹http://vivi.sina.com.cn href="javascript:d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(vivi=window.open('http://vivi.sina.com.cn/collect/icollect.php?pid=2008&title='+escape(d.title)+'&url='+escape(d.location.href)+'&desc='+escape(t),'vivi','scrollbars=no,width=480,height=480,left=75,top=20,status=no,resizable=yes'));vivi.focus();"><IMG src="/images/vivi_coop1.gif" align=absMiddle border=0></A></td>
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<P>/*///////////////////////////////////////////////<BR> 任意角度画线,只用到加减法，速度较快<BR> 适用于256*256以下液晶<BR> CALL MOVETO(X,Y); 当前坐标移到X,Y<BR> CALL LINETO(X2,Y2); 画线到X2,Y2点<BR> CALL LINETO(X3,Y3); 画线到X3,Y3点<BR> <BR> DRAW_PIXEL(CURX,CURY) 画点程序根据不同液晶自编<BR><BR>*////////////////////////////////////////////////<BR> DECLARE CURX,CURY BYTE;<BR><BR> MOVETO: PROCEDURE(X,Y) PUBLIC;<BR> DECLARE (X,Y) BYTE;<BR> CURX=X;<BR> CURY=Y;<BR> END MOVETO;<BR><BR> LINETO: PROCEDURE(X,Y) PUBLIC;<BR> DECLARE (X,Y) BYTE;<BR> DECLARE (XERR,YERR) WORD;<BR> DECLARE (I,DISTANCE) BYTE;<BR> DECLARE (DTAX,DTAY) BYTE;<BR> DECLARE (INCX,INCY) BYTE;<BR><BR> INCX,INCY,DTAX,DTAY=0;<BR> XERR,YERR=0;<BR> IF X>CURX THEN DO;<BR> INCX=1;<BR> DTAX=X-CURX;<BR> END;<BR> ELSE<BR> IF X<CURX THEN DO;<BR> INCX=-1;<BR> DTAX=CURX-X;<BR> END;<BR> IF Y>CURY THEN DO;<BR> INCY=1;<BR> DTAY=Y-CURY;<BR> END;<BR> ELSE<BR> IF Y<CURY THEN DO;<BR> INCY=-1;<BR> DTAY=CURY-Y;<BR> END;<BR> IF DTAX>DTAY THEN DISTANCE=DTAX;<BR> ELSE DISTANCE=DTAY;<BR><BR> DO I=0 TO DISTANCE;<BR> CALL DRAW_PIXEL(CURX,CURY); /* 画点 */<BR> XERR=XERR+DTAX;<BR> YERR=YERR+DTAY;<BR> IF XERR>DISTANCE THEN DO;<BR> XERR=XERR-DISTANCE;<BR> CURX=CURX+INCX;<BR> END;<BR> IF YERR>DISTANCE THEN DO;<BR> YERR=YERR-DISTANCE;<BR> CURY=CURY+INCY;<BR> END;<BR> END;<BR><BR> END LINETO;<BR>
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