📄 function.ps-translate.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Sets translation</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.ps.html">PS Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.rpmreader.html">RPM Reader</a></div> <div class="up"><a href="ref.ps.html">PS Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.ps-translate" class="refentry"> <div class="refnamediv"> <h1 class="refname">ps_translate</h1> <p class="verinfo">(PECL ps:1.1.0-1.3.5)</p><p class="refpurpose"><span class="refname">ps_translate</span> — <span class="dc-title">Sets translation</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>ps_translate</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$psdoc</tt></span> , <span class="methodparam"><span class="type">float</span> <tt class="parameter">$x</tt></span> , <span class="methodparam"><span class="type">float</span> <tt class="parameter">$y</tt></span> )</div> <p class="para rdfs-comment"> Sets a new initial point of the coordinate system. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">psdoc</tt></i></span> <dd> <p class="para"> Resource identifier of the postscript file as returned by <a href="function.ps-new.html" class="function">ps_new()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">x</tt></i></span> <dd> <p class="para"> x-coordinate of the origin of the translated coordinate system. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">y</tt></i></span> <dd> <p class="para"> y-coordinate of the origin of the translated coordinate system. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Translation of the coordinate system</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">rectangle</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">ps_moveto</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">ps_lineto</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">ps_lineto</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">ps_lineto</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">ps_lineto</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">ps_stroke</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">$ps </span><span style="color: #007700">= </span><span style="color: #0000BB">ps_new</span><span style="color: #007700">();<br />if (!</span><span style="color: #0000BB">ps_open_file</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"translate.ps"</span><span style="color: #007700">)) {<br /> print </span><span style="color: #DD0000">"Cannot open PostScript file\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #0000BB">ps_set_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"Creator"</span><span style="color: #007700">, </span><span style="color: #DD0000">"translate.php"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_set_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"Author"</span><span style="color: #007700">, </span><span style="color: #DD0000">"Uwe Steinmann"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_set_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"Title"</span><span style="color: #007700">, </span><span style="color: #DD0000">"Translated example"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_set_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"BoundingBox"</span><span style="color: #007700">, </span><span style="color: #DD0000">"0 0 596 842"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$psfont </span><span style="color: #007700">= </span><span style="color: #0000BB">ps_findfont</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"Helvetica"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">ps_begin_page</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">596</span><span style="color: #007700">, </span><span style="color: #0000BB">842</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_set_text_pos</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_translate</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">500</span><span style="color: #007700">, </span><span style="color: #0000BB">750</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">rectangle</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_translate</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, -</span><span style="color: #0000BB">500</span><span style="color: #007700">, -</span><span style="color: #0000BB">750</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_setfont</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">$psfont</span><span style="color: #007700">, </span><span style="color: #0000BB">8.0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_show</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"Text at initial position"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_end_page</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">ps_begin_page</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">596</span><span style="color: #007700">, </span><span style="color: #0000BB">842</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_set_text_pos</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_save</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_translate</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">500</span><span style="color: #007700">, </span><span style="color: #0000BB">750</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">rectangle</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_restore</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_setfont</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #0000BB">$psfont</span><span style="color: #007700">, </span><span style="color: #0000BB">8.0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_show</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">, </span><span style="color: #DD0000">"Text at initial position"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">ps_end_page</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">ps_delete</span><span style="color: #007700">(</span><span style="color: #0000BB">$ps</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><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></div> <div class="example-contents"><p> On the second page a slightly different and more elegant approach is applied. Instead of undoing the translation with a second call of <b>ps_translate()</b> the graphics context is saved before modifying the coordinate system and restored after drawing the rectangle. </p></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.ps-scale.html" class="function" rel="rdfs-seeAlso">ps_scale()</a></li> <li class="member"><a href="function.ps-rotate.html" class="function" rel="rdfs-seeAlso">ps_rotate()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.ps.html">PS Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.rpmreader.html">RPM Reader</a></div> <div class="up"><a href="ref.ps.html">PS Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -