mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
155 lines
7.4 KiB
HTML
155 lines
7.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>Draws an open polygon</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.imageopenpolygon" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">imageopenpolygon</h1>
|
||
<p class="verinfo">(PHP 7 >= 7.2.0)</p><p class="refpurpose"><span class="refname">imageopenpolygon</span> — <span class="dc-title">Draws an open polygon</span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.imageopenpolygon-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>imageopenpolygon</strong></span>
|
||
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
|
||
, <span class="methodparam"><span class="type">array</span> <code class="parameter">$points</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$num_points</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
|
||
) : <span class="type">bool</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
<span class="function"><strong>imageopenpolygon()</strong></span> draws an open polygon on the given
|
||
<code class="parameter">image</code>. Contrary to <span class="function"><a href="imagepolygon.html" class="function">imagepolygon()</a></span>,
|
||
no line is drawn between the last and the first point.
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.imageopenpolygon-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<p class="para">
|
||
<dl>
|
||
|
||
<dt>
|
||
<code class="parameter">image</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">由图象创建函数(例如<span class="function"><a href="imagecreatetruecolor.html" class="function">imagecreatetruecolor()</a></span>)返回的图象资源。</p></dd>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">points</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
An array containing the polygon's vertices, e.g.:
|
||
<table class="doctable informaltable">
|
||
|
||
<tbody class="tbody">
|
||
<tr>
|
||
<td>points[0]</td>
|
||
<td>= x0</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>points[1]</td>
|
||
<td>= y0</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>points[2]</td>
|
||
<td>= x1</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>points[3]</td>
|
||
<td>= y1</td>
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">num_points</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Total number of points (vertices).
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">color</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
A color identifier created with <span class="function"><a href="imagecolorallocate.html" class="function">imagecolorallocate()</a></span>.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.imageopenpolygon-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.imageopenpolygon-examples">
|
||
<h3 class="title">范例</h3>
|
||
<p class="para">
|
||
<div class="example" id="example-3723">
|
||
<p><strong>Example #1 <span class="function"><strong>imageopenpolygon()</strong></span> example</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Create a blank image<br /></span><span style="color: #0000BB">$image </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">400</span><span style="color: #007700">, </span><span style="color: #0000BB">300</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Allocate a color for the polygon<br /></span><span style="color: #0000BB">$col_poly </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Draw the polygon<br /></span><span style="color: #0000BB">imageopenpolygon</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, array(<br /> </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">100</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">,<br /> </span><span style="color: #0000BB">300</span><span style="color: #007700">, </span><span style="color: #0000BB">200<br /> </span><span style="color: #007700">),<br /> </span><span style="color: #0000BB">3</span><span style="color: #007700">,<br /> </span><span style="color: #0000BB">$col_poly</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Output the picture to the browser<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-type: image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
<div class="example-contents"><p>以上例程的输出类似于：</p></div>
|
||
<div class="mediaobject">
|
||
|
||
<div class="imageobject">
|
||
<img src="images/21009b70229598c6a80eef8b45bf282b-imageopenpolygon.png" alt="Output of example : imageopenpolygon()" width="400" height="300" />
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.imageopenpolygon-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<p class="para">
|
||
<ul class="simplelist">
|
||
<li class="member"><span class="function"><a href="imagepolygon.html" class="function" rel="rdfs-seeAlso">imagepolygon()</a> - 画一个多边形</span></li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |