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50 lines
7.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>画一多边形并填充</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.imagefilledpolygon" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imagefilledpolygon</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imagefilledpolygon</span> — <span class="dc-title">画一多边形并填充</span></p>
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</div>
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<div class="refsect1 unknown-seealsp" id="refsect1-function.imagefilledpolygon-unknown-seealsp">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>imagefilledpolygon</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$points</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$num_points</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>imagefilledpolygon()</strong></span> 在 <code class="parameter">image</code>
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图像中画一个填充了的多边形。
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</p>
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<p class="para">
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<code class="parameter">points</code> 参数是一个按顺序包含有多边形各顶点的
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<em>x</em> 和 <em>y</em>
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坐标的数组。
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</p>
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<p class="para">
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<code class="parameter">num_points</code> 参数是顶点的总数，必须大于 3。
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</p>
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<p class="para">
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<div class="example" id="example-3696">
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<p><strong>Example #1 <span class="function"><strong>imagefilledpolygon()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// 建立多边形各顶点坐标的数组<br /></span><span style="color: #0000BB">$values </span><span style="color: #007700">= array(<br /> </span><span style="color: #0000BB">40</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #FF8000">// Point 1 (x, y)<br /> </span><span style="color: #0000BB">20</span><span style="color: #007700">, </span><span style="color: #0000BB">240</span><span style="color: #007700">, </span><span style="color: #FF8000">// Point 2 (x, y)<br /> </span><span style="color: #0000BB">60</span><span style="color: #007700">, </span><span style="color: #0000BB">60</span><span style="color: #007700">, </span><span style="color: #FF8000">// Point 3 (x, y)<br /> </span><span style="color: #0000BB">240</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">, </span><span style="color: #FF8000">// Point 4 (x, y)<br /> </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">40</span><span style="color: #007700">, </span><span style="color: #FF8000">// Point 5 (x, y)<br /> </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">10 </span><span style="color: #FF8000">// Point 6 (x, y)<br /> </span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 创建图像<br /></span><span style="color: #0000BB">$image </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">250</span><span style="color: #007700">, </span><span style="color: #0000BB">250</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 设定颜色<br /></span><span style="color: #0000BB">$bg </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$blue </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 画一个多边形<br /></span><span style="color: #0000BB">imagefilledpolygon</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">$values</span><span style="color: #007700">, </span><span style="color: #0000BB">6</span><span style="color: #007700">, </span><span style="color: #0000BB">$blue</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 输出图像<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-type: image/png'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$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>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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</div></div></div></body></html> |