<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >ps_rotate</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="PostScript document creation" HREF="ref.ps.html"><LINK REL="PREVIOUS" TITLE="ps_restore" HREF="function.ps-restore.html"><LINK REL="NEXT" TITLE="ps_save" HREF="function.ps-save.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.ps-restore.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.ps-save.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.ps-rotate" ></A >ps_rotate</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN192274" ></A ><P > (PECL)</P >ps_rotate -- Sets rotation factor</DIV ><DIV CLASS="refsect1" ><A NAME="AEN192277" ></A ><H2 >说明</H2 >bool <B CLASS="methodname" >ps_rotate</B > ( resource psdoc, float rot )<BR ></BR ><P > Sets the rotation of the coordinate system. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN192289" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >psdoc</CODE ></DT ><DD ><P > Resource identifier of the postscript file as returned by <A HREF="function.ps-new.html" ><B CLASS="function" >ps_new()</B ></A >. </P ></DD ><DT ><CODE CLASS="parameter" >rot</CODE ></DT ><DD ><P > Angle of rotation in degree. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN192304" ></A ><H2 >返回值</H2 ><P > 如果成功则返回 <TT CLASS="constant" ><B >TRUE</B ></TT >,失败则返回 <TT CLASS="constant" ><B >FALSE</B ></TT >。 </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN192309" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN192312" ></A ><P ><B >例 1. Rotation of the coordinate system</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#007700">function </font><font color="#0000BB">rectangle</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">) {<br /> </font><font color="#0000BB">ps_moveto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /> </font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">);<br /> </font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">);<br /> </font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /> </font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /> </font><font color="#0000BB">ps_stroke</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br />}<br /><br /></font><font color="#0000BB">$ps </font><font color="#007700">= </font><font color="#0000BB">ps_new</font><font color="#007700">();<br />if (!</font><font color="#0000BB">ps_open_file</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"rotation.ps"</font><font color="#007700">)) {<br /> print </font><font color="#DD0000">"Cannot open PostScript file\n"</font><font color="#007700">;<br /> exit;<br />}<br /><br /></font><font color="#0000BB">ps_set_info</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"Creator"</font><font color="#007700">, </font><font color="#DD0000">"rotation.php"</font><font color="#007700">);<br /></font><font color="#0000BB">ps_set_info</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"Author"</font><font color="#007700">, </font><font color="#DD0000">"Uwe Steinmann"</font><font color="#007700">);<br /></font><font color="#0000BB">ps_set_info</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"Title"</font><font color="#007700">, </font><font color="#DD0000">"Rotation example"</font><font color="#007700">);<br /></font><font color="#0000BB">ps_set_info</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"BoundingBox"</font><font color="#007700">, </font><font color="#DD0000">"0 0 596 842"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$psfont </font><font color="#007700">= </font><font color="#0000BB">ps_findfont</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"Helvetica"</font><font color="#007700">, </font><font color="#DD0000">""</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /><br /></font><font color="#0000BB">ps_begin_page</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">596</font><font color="#007700">, </font><font color="#0000BB">842</font><font color="#007700">);<br /></font><font color="#0000BB">ps_set_text_pos</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">);<br /></font><font color="#0000BB">ps_save</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /></font><font color="#0000BB">ps_translate</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">);<br /></font><font color="#0000BB">ps_rotate</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">45</font><font color="#007700">);<br /></font><font color="#0000BB">rectangle</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /></font><font color="#0000BB">ps_restore</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /></font><font color="#0000BB">ps_setfont</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">$psfont</font><font color="#007700">, </font><font color="#0000BB">8.0</font><font color="#007700">);<br /></font><font color="#0000BB">ps_show</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"Text without rotation"</font><font color="#007700">);<br /></font><font color="#0000BB">ps_end_page</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /><br /></font><font color="#0000BB">ps_delete</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > The above example illustrates a very common way of rotating a graphic (in this case just a rectangle) by simply rotating the coordinate system. Since the graphic's coordinate system assumes (0,0) to be the origin, the page coordinate system is also translated to place the graphics not on the edge of the page. Pay attention to the order of <A HREF="function.ps-translate.html" ><B CLASS="function" >ps_translate()</B ></A > and <B CLASS="function" >ps_rotate()</B >. In the above case the rectancle is rotated around the point (100, 100) in the untranslated coordinate system. Switching the two statements has a completely different result. </P ><P > In order to output the following text at the original position, all modifications of the coordinate system are encapsulated in <A HREF="function.ps-save.html" ><B CLASS="function" >ps_save()</B ></A > and <A HREF="function.ps-restore.html" ><B CLASS="function" >ps_restore()</B ></A >. </P ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN192321" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.ps-scale.html" ><B CLASS="function" >ps_scale()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.ps-translate.html" ><B CLASS="function" >ps_translate()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.ps-restore.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.ps-save.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >ps_restore</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.ps.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >ps_save</TD ></TR ></TABLE ></DIV ></BODY ></HTML >