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php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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>ps_translate</TITLE
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><H1
><A
NAME="function.ps-translate"
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>ps_translate</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN194307"
></A
><P
>    (PECL)</P
>ps_translate&nbsp;--&nbsp;Sets translation</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN194310"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>ps_translate</B
> ( resource psdoc, float x, float y )<BR
></BR
><P
>&#13;   Sets a new initial point of the coordinate system.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN194325"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>psdoc</CODE
></DT
><DD
><P
>&#13;       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"
>x</CODE
></DT
><DD
><P
>&#13;       x-coordinate of the origin of the translated coordinate system.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>y</CODE
></DT
><DD
><P
>&#13;       y-coordinate of the origin of the translated coordinate system.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN194345"
></A
><H2
>返回值</H2
><P
>&#13;   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="AEN194350"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN194353"
></A
><P
><B
>例 1. Translation of the coordinate system</B
></P
><TABLE
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#007700">function </font><font color="#0000BB">rectangle</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">ps_moveto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">50</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">ps_lineto</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</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">$ps</font><font color="#007700">, </font><font color="#DD0000">"translate.ps"</font><font color="#007700">)) {<br />&nbsp;&nbsp;print </font><font color="#DD0000">"Cannot open PostScript file\n"</font><font color="#007700">;<br />&nbsp;&nbsp;exit;<br />}<br /><br /></font><font color="#0000BB">ps_set_info</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#DD0000">"Creator"</font><font color="#007700">, </font><font color="#DD0000">"translate.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">"Translated 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">$ps</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">);<br /></font><font color="#0000BB">ps_translate</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, </font><font color="#0000BB">500</font><font color="#007700">, </font><font color="#0000BB">750</font><font color="#007700">);<br /></font><font color="#0000BB">rectangle</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /></font><font color="#0000BB">ps_translate</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">, -</font><font color="#0000BB">500</font><font color="#007700">, -</font><font color="#0000BB">750</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">$ps</font><font color="#007700">, </font><font color="#DD0000">"Text at initial position"</font><font color="#007700">);<br /></font><font color="#0000BB">ps_end_page</font><font color="#007700">(</font><font color="#0000BB">$ps</font><font color="#007700">);<br /><br /></font><font color="#0000BB">ps_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">500</font><font color="#007700">, </font><font color="#0000BB">750</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">$ps</font><font color="#007700">, </font><font color="#DD0000">"Text at initial position"</font><font color="#007700">);<br /></font><font color="#0000BB">ps_end_page</font><font color="#007700">(</font><font color="#0000BB">$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">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>The above example demonstrates two possible ways to place
     a graphic (in this case just a rectangle) at any position on the page,
     while the graphic itself uses its own coordinate system. The trick is
     to change the origin of the current coordinate system before drawing
     the rectangle. The translation has to undone after the graphic has
     been drawn.
    </P
><P
>&#13;     On the second page a slightly different and more elegant approach is
     applied. Instead of undoing the translation with a second call of
     <B
CLASS="function"
>ps_translate()</B
> the graphics context is saved before
     modifying the coordinate system and restored after drawing the rectangle.
    </P
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN194359"
></A
><H2
>参见</H2
><P
>&#13;   <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-rotate.html"
><B
CLASS="function"
>ps_rotate()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
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