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docs: generated API documentation (483 pages)
2026-07-24 11:55:47 +00:00

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&#160;<span id="projectnumber">3.1.0</span>
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<a href="#pub-methods">Public 成员函数</a> &#124;
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<div class="title">vde::spatial::Octree&lt; T &gt; 模板类 参考</div> </div>
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<p>八叉树空间索引
<a href="classvde_1_1spatial_1_1Octree.html#details">更多...</a></p>
<p><code>#include &lt;<a class="el" href="octree_8h_source.html">octree.h</a>&gt;</code></p>
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类 vde::spatial::Octree&lt; T &gt; 继承关系图:</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public 成员函数</h2></td></tr>
<tr class="memitem:aa61288e4ab6ee3a729d58488a1f88d23"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#aa61288e4ab6ee3a729d58488a1f88d23">Octree</a> (int max_depth=8, int max_items=16)</td></tr>
<tr class="memdesc:aa61288e4ab6ee3a729d58488a1f88d23"><td class="mdescLeft">&#160;</td><td class="mdescRight">构造八叉树 <a href="classvde_1_1spatial_1_1Octree.html#aa61288e4ab6ee3a729d58488a1f88d23">更多...</a><br /></td></tr>
<tr class="separator:aa61288e4ab6ee3a729d58488a1f88d23"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a89f097f05a5d8e3f37c8827b0becf13a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#a89f097f05a5d8e3f37c8827b0becf13a">build</a> (const std::vector&lt; T &gt; &amp;items) override</td></tr>
<tr class="memdesc:a89f097f05a5d8e3f37c8827b0becf13a"><td class="mdescLeft">&#160;</td><td class="mdescRight">批量构建八叉树 <a href="classvde_1_1spatial_1_1Octree.html#a89f097f05a5d8e3f37c8827b0becf13a">更多...</a><br /></td></tr>
<tr class="separator:a89f097f05a5d8e3f37c8827b0becf13a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4f4f6b7a241c6a546406fbf40d42bad2"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#a4f4f6b7a241c6a546406fbf40d42bad2">insert</a> (const T &amp;item) override</td></tr>
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<tr class="separator:a4f4f6b7a241c6a546406fbf40d42bad2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a57d8e701deb0fb778caa9df487f22e38"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#a57d8e701deb0fb778caa9df487f22e38">remove</a> (const T &amp;item) override</td></tr>
<tr class="memdesc:a57d8e701deb0fb778caa9df487f22e38"><td class="mdescLeft">&#160;</td><td class="mdescRight">删除对象 <a href="classvde_1_1spatial_1_1Octree.html#a57d8e701deb0fb778caa9df487f22e38">更多...</a><br /></td></tr>
<tr class="separator:a57d8e701deb0fb778caa9df487f22e38"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5a577319aeb8e7f4fc2bcb76fc23d425"><td class="memItemLeft" align="right" valign="top">std::vector&lt; T &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#a5a577319aeb8e7f4fc2bcb76fc23d425">query_range</a> (const AABB3D &amp;range) const override</td></tr>
<tr class="memdesc:a5a577319aeb8e7f4fc2bcb76fc23d425"><td class="mdescLeft">&#160;</td><td class="mdescRight">范围查询 <a href="classvde_1_1spatial_1_1Octree.html#a5a577319aeb8e7f4fc2bcb76fc23d425">更多...</a><br /></td></tr>
<tr class="separator:a5a577319aeb8e7f4fc2bcb76fc23d425"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a01e4aebdad76a100da83b6fcec6bef52"><td class="memItemLeft" align="right" valign="top">std::vector&lt; T &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#a01e4aebdad76a100da83b6fcec6bef52">query_knn</a> (const Point3D &amp;point, size_t k) const override</td></tr>
<tr class="memdesc:a01e4aebdad76a100da83b6fcec6bef52"><td class="mdescLeft">&#160;</td><td class="mdescRight">K 近邻查询 <a href="classvde_1_1spatial_1_1Octree.html#a01e4aebdad76a100da83b6fcec6bef52">更多...</a><br /></td></tr>
<tr class="separator:a01e4aebdad76a100da83b6fcec6bef52"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aeb6be8f90b1e0da1f8abb106aae14a9e"><td class="memItemLeft" align="right" valign="top">std::vector&lt; T &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#aeb6be8f90b1e0da1f8abb106aae14a9e">query_ray</a> (const Ray3Dd &amp;ray) const override</td></tr>
<tr class="memdesc:aeb6be8f90b1e0da1f8abb106aae14a9e"><td class="mdescLeft">&#160;</td><td class="mdescRight">射线查询 <a href="classvde_1_1spatial_1_1Octree.html#aeb6be8f90b1e0da1f8abb106aae14a9e">更多...</a><br /></td></tr>
<tr class="separator:aeb6be8f90b1e0da1f8abb106aae14a9e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a662710127e41ac3c225eaf36ef2c3ca4"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#a662710127e41ac3c225eaf36ef2c3ca4">clear</a> () override</td></tr>
<tr class="memdesc:a662710127e41ac3c225eaf36ef2c3ca4"><td class="mdescLeft">&#160;</td><td class="mdescRight">清空八叉树 <a href="classvde_1_1spatial_1_1Octree.html#a662710127e41ac3c225eaf36ef2c3ca4">更多...</a><br /></td></tr>
<tr class="separator:a662710127e41ac3c225eaf36ef2c3ca4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa023943f4019613695359e5ba7f370b1"><td class="memItemLeft" align="right" valign="top">size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1Octree.html#aa023943f4019613695359e5ba7f370b1">size</a> () const override</td></tr>
<tr class="memdesc:aa023943f4019613695359e5ba7f370b1"><td class="mdescLeft">&#160;</td><td class="mdescRight">当前索引中的对象数量 <a href="classvde_1_1spatial_1_1Octree.html#aa023943f4019613695359e5ba7f370b1">更多...</a><br /></td></tr>
<tr class="separator:aa023943f4019613695359e5ba7f370b1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classvde_1_1spatial_1_1SpatialIndex"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classvde_1_1spatial_1_1SpatialIndex')"><img src="closed.png" alt="-"/>&#160;Public 成员函数 继承自 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html">vde::spatial::SpatialIndex&lt; T &gt;</a></td></tr>
<tr class="memitem:ab27637c0122a9fd82ebc12598db496f1 inherit pub_methods_classvde_1_1spatial_1_1SpatialIndex"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#ab27637c0122a9fd82ebc12598db496f1">~SpatialIndex</a> ()=default</td></tr>
<tr class="separator:ab27637c0122a9fd82ebc12598db496f1 inherit pub_methods_classvde_1_1spatial_1_1SpatialIndex"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">详细描述</h2>
<div class="textblock"><h3>template&lt;typename T&gt;<br />
class vde::spatial::Octree&lt; T &gt;</h3>
<p>八叉树空间索引 </p>
<p>将三维空间递归划分为 8 个等大的子立方体区域。 每个节点维护自身包围盒与所含对象列表。 当节点中对象数超过 max_items 且未达到最大深度时自动剖分。</p>
<p>构建: O(n) 逐项插入 范围查询: O(8^d + k)，d 为最大深度，k 为结果数 KNN 查询: O(8^d + k log k) 射线查询: O(8^d + k)</p>
<dl class="tparams"><dt>模板参数</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>被索引的空间对象类型</td></tr>
</table>
</dd>
</dl>
<dl class="section note"><dt>注解</dt><dd>适用于体积数据、粒子系统、空间哈希等场景。 对非均匀分布的数据（如细长三角网格），BVH 通常更优。</dd></dl>
<div class="fragment"><div class="line">Octree&lt;Point3D&gt; octree(8, 16 <span class="comment">// max_depth, max_items);</span></div>
<div class="line">octree.build(points);</div>
<div class="line"><span class="keyword">auto</span> neighbors = octree.query_knn(query_point, 5);</div>
</div><!-- fragment --><dl class="section see"><dt>参见</dt><dd><a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html" title="空间索引抽象基类">SpatialIndex</a>, <a class="el" href="classvde_1_1spatial_1_1BVH.html" title="包围盒层次结构 — 三角形网格加速结构">BVH</a>, <a class="el" href="classvde_1_1spatial_1_1KDTree.html" title="k-d 树空间索引">KDTree</a> </dd></dl>
<p class="definition">在文件 <a class="el" href="octree_8h_source.html">octree.h</a> 第 <a class="el" href="octree_8h_source.html#l00051">51</a> 行定义.</p>
</div><h2 class="groupheader">构造及析构函数说明</h2>
<a id="aa61288e4ab6ee3a729d58488a1f88d23"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa61288e4ab6ee3a729d58488a1f88d23">&#9670;&nbsp;</a></span>Octree()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename T &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::<a class="el" href="classvde_1_1spatial_1_1Octree.html">Octree</a> </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>max_depth</em> = <code>8</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>max_items</em> = <code>16</code>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">explicit</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>构造八叉树 </p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">max_depth</td><td>最大递归深度（默认 8，对应 256³ 分辨率） </td></tr>
<tr><td class="paramname">max_items</td><td>节点剖分前可容纳的最大对象数（默认 16） </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<h2 class="groupheader">成员函数说明</h2>
<a id="a89f097f05a5d8e3f37c8827b0becf13a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a89f097f05a5d8e3f37c8827b0becf13a">&#9670;&nbsp;</a></span>build()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename T &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::build </td>
<td>(</td>
<td class="paramtype">const std::vector&lt; T &gt; &amp;&#160;</td>
<td class="paramname"><em>items</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>批量构建八叉树 </p>
<p>清空已有数据，将所有 items 逐个插入。 构建复杂度 O(n)。</p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">items</td><td>待索引的对象数组 </td></tr>
</table>
</dd>
</dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#a3cc8e80b3f92fbb5766094066a120364">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
</div>
</div>
<a id="a662710127e41ac3c225eaf36ef2c3ca4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a662710127e41ac3c225eaf36ef2c3ca4">&#9670;&nbsp;</a></span>clear()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename T &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::clear </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>清空八叉树 </p>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#a609143536e3307d5bacaf21cb19c0840">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
</div>
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<a id="a4f4f6b7a241c6a546406fbf40d42bad2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4f4f6b7a241c6a546406fbf40d42bad2">&#9670;&nbsp;</a></span>insert()</h2>
<div class="memitem">
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template&lt;typename T &gt; </div>
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<td class="memname">void <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::insert </td>
<td>(</td>
<td class="paramtype">const T &amp;&#160;</td>
<td class="paramname"><em>item</em></td><td>)</td>
<td></td>
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<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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<p>增量插入对象 </p>
<p>从根节点递归，到达容纳它的最深层节点。 若节点超出 max_items 且未达 max_depth，自动剖分。</p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">item</td><td>待插入的空间对象 </td></tr>
</table>
</dd>
</dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#ad494ecb8a0178a8bedddfd0278b39162">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
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<a id="a01e4aebdad76a100da83b6fcec6bef52"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a01e4aebdad76a100da83b6fcec6bef52">&#9670;&nbsp;</a></span>query_knn()</h2>
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template&lt;typename T &gt; </div>
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<td class="memname">std::vector&lt;T&gt; <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::query_knn </td>
<td>(</td>
<td class="paramtype">const Point3D &amp;&#160;</td>
<td class="paramname"><em>point</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>k</em>&#160;</td>
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<td></td>
<td>)</td>
<td></td><td> const</td>
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<p>K 近邻查询 </p>
<p>使用优先队列按距离剪枝遍历八叉树节点。</p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">point</td><td>查询点 </td></tr>
<tr><td class="paramname">k</td><td>返回数量 </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>返回</dt><dd>最近的 k 个对象 </dd></dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#afae94f2d82bf75c2096c409809735381">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a5a577319aeb8e7f4fc2bcb76fc23d425">&#9670;&nbsp;</a></span>query_range()</h2>
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<td class="memname">std::vector&lt;T&gt; <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::query_range </td>
<td>(</td>
<td class="paramtype">const AABB3D &amp;&#160;</td>
<td class="paramname"><em>range</em></td><td>)</td>
<td> const</td>
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<p>范围查询 </p>
<p>从根节点递归，只访问与 range 相交的子节点。</p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">range</td><td>查询包围盒 </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>返回</dt><dd>与 range 相交的对象列表 </dd></dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#acaddc825aeb513861587e070ed222584">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#aeb6be8f90b1e0da1f8abb106aae14a9e">&#9670;&nbsp;</a></span>query_ray()</h2>
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<td class="memname">std::vector&lt;T&gt; <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::query_ray </td>
<td>(</td>
<td class="paramtype">const Ray3Dd &amp;&#160;</td>
<td class="paramname"><em>ray</em></td><td>)</td>
<td> const</td>
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</table>
</td>
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<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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<p>射线查询 </p>
<p>遍历被射线穿过的八叉树节点，收集其中相交对象。</p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">ray</td><td>查询射线 </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>返回</dt><dd>按命中顺序排列的相交对象列表 </dd></dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#ac3bd96db5d118856a25081d9b8820225">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a57d8e701deb0fb778caa9df487f22e38">&#9670;&nbsp;</a></span>remove()</h2>
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<td class="memname">bool <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::remove </td>
<td>(</td>
<td class="paramtype">const T &amp;&#160;</td>
<td class="paramname"><em>item</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
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<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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<p>删除对象 </p>
<dl class="params"><dt>参数</dt><dd>
<table class="params">
<tr><td class="paramname">item</td><td>待删除的空间对象 </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>返回</dt><dd>删除成功返回 true；对象不存在返回 false </dd></dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#a135664f598eae21a922ceead3a60d5ab">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
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<a id="aa023943f4019613695359e5ba7f370b1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa023943f4019613695359e5ba7f370b1">&#9670;&nbsp;</a></span>size()</h2>
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template&lt;typename T &gt; </div>
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<td class="memname">size_t <a class="el" href="classvde_1_1spatial_1_1Octree.html">vde::spatial::Octree</a>&lt; T &gt;::size </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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<p>当前索引中的对象数量 </p>
<dl class="section return"><dt>返回</dt><dd>对象总数 </dd></dl>
<p>实现了 <a class="el" href="classvde_1_1spatial_1_1SpatialIndex.html#ae972c151054589684f24b53ec08a99d1">vde::spatial::SpatialIndex&lt; T &gt;</a>.</p>
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<hr/>该类的文档由以下文件生成:<ul>
<li>include/vde/spatial/<a class="el" href="octree_8h_source.html">octree.h</a></li>
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