茂之钳
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341 lines
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 <span id="projectnumber">3.1.0</span>
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<div id="projectbrief">高性能 CAD 计算几何引擎</div>
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<a href="#pub-types">Public 类型</a> |
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<a href="#pub-static-methods">静态 Public 成员函数</a> |
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<a href="structvde_1_1foundation_1_1Predicates-members.html">所有成员列表</a> </div>
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<div class="headertitle">
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<div class="title">vde::foundation::Predicates结构体 参考<div class="ingroups"><a class="el" href="group__foundation.html">基础模块</a></div></div> </div>
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</div><!--header-->
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<div class="contents">
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<p>统一谓词接口 — 编译时选择 GMP 或自适应双精度后端
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<a href="structvde_1_1foundation_1_1Predicates.html#details">更多...</a></p>
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<p><code>#include <<a class="el" href="predicates_8h_source.html">predicates.h</a>></code></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
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Public 类型</h2></td></tr>
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<tr class="memitem:ac8062938b3b7dd59249e626422fb1498"><td class="memItemLeft" align="right" valign="top">using </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1foundation_1_1Predicates.html#ac8062938b3b7dd59249e626422fb1498">Backend</a> = exact::AdaptiveDouble</td></tr>
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<tr class="memdesc:ac8062938b3b7dd59249e626422fb1498"><td class="mdescLeft"> </td><td class="mdescRight">使用自适应双精度算术（Shewchuk 算法，默认） <a href="structvde_1_1foundation_1_1Predicates.html#ac8062938b3b7dd59249e626422fb1498">更多...</a><br /></td></tr>
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<tr class="separator:ac8062938b3b7dd59249e626422fb1498"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
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静态 Public 成员函数</h2></td></tr>
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<tr class="memitem:adc7368ec2eb4d42239116aa7deb57772"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="group__foundation.html#gae42a60a99e11250a45ab0de45970c95f">exact::Orientation</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1foundation_1_1Predicates.html#adc7368ec2eb4d42239116aa7deb57772">orient_2d</a> (const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &a, const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &b, const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &c)</td></tr>
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<tr class="memdesc:adc7368ec2eb4d42239116aa7deb57772"><td class="mdescLeft"> </td><td class="mdescRight">二维定向测试 <a href="structvde_1_1foundation_1_1Predicates.html#adc7368ec2eb4d42239116aa7deb57772">更多...</a><br /></td></tr>
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<tr class="separator:adc7368ec2eb4d42239116aa7deb57772"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a56f6d48fc9722cf6fe907b79b9c311d9"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="group__foundation.html#gae42a60a99e11250a45ab0de45970c95f">exact::Orientation</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1foundation_1_1Predicates.html#a56f6d48fc9722cf6fe907b79b9c311d9">orient_3d</a> (const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> &a, const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> &b, const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> &c, const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> &d)</td></tr>
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<tr class="memdesc:a56f6d48fc9722cf6fe907b79b9c311d9"><td class="mdescLeft"> </td><td class="mdescRight">三维定向测试 <a href="structvde_1_1foundation_1_1Predicates.html#a56f6d48fc9722cf6fe907b79b9c311d9">更多...</a><br /></td></tr>
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<tr class="separator:a56f6d48fc9722cf6fe907b79b9c311d9"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a42b5ee8ce029e85d918885059470f299"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="group__foundation.html#gaf44d45ba6402f725ee5d2cf828e25588">exact::CircleTest</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1foundation_1_1Predicates.html#a42b5ee8ce029e85d918885059470f299">in_circle</a> (const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &a, const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &b, const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &c, const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> &d)</td></tr>
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<tr class="memdesc:a42b5ee8ce029e85d918885059470f299"><td class="mdescLeft"> </td><td class="mdescRight">圆内测试 <a href="structvde_1_1foundation_1_1Predicates.html#a42b5ee8ce029e85d918885059470f299">更多...</a><br /></td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">详细描述</h2>
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<div class="textblock"><p>统一谓词接口 — 编译时选择 GMP 或自适应双精度后端 </p>
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<p>根据 VDE_USE_GMP 宏自动选择 GmpExact 或 <a class="el" href="structvde_1_1foundation_1_1AdaptiveDouble.html">AdaptiveDouble</a> 作为后端。 上层代码只需使用 Predicates，无需关心具体实现。 </p>
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<p class="definition">在文件 <a class="el" href="predicates_8h_source.html">predicates.h</a> 第 <a class="el" href="predicates_8h_source.html#l00017">17</a> 行定义.</p>
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</div><h2 class="groupheader">成员类型定义说明</h2>
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<a id="ac8062938b3b7dd59249e626422fb1498"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#ac8062938b3b7dd59249e626422fb1498">◆ </a></span>Backend</h2>
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<table class="memname">
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<td class="memname">using <a class="el" href="structvde_1_1foundation_1_1Predicates.html#ac8062938b3b7dd59249e626422fb1498">vde::foundation::Predicates::Backend</a> = exact::AdaptiveDouble</td>
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</div><div class="memdoc">
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<p>使用自适应双精度算术（Shewchuk 算法，默认） </p>
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<p class="definition">在文件 <a class="el" href="predicates_8h_source.html">predicates.h</a> 第 <a class="el" href="predicates_8h_source.html#l00023">23</a> 行定义.</p>
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</div>
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<h2 class="groupheader">成员函数说明</h2>
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<a id="a42b5ee8ce029e85d918885059470f299"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a42b5ee8ce029e85d918885059470f299">◆ </a></span>in_circle()</h2>
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<td class="memname">static <a class="el" href="group__foundation.html#gaf44d45ba6402f725ee5d2cf828e25588">exact::CircleTest</a> vde::foundation::Predicates::in_circle </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>a</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>b</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>c</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>d</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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<p>圆内测试 </p>
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<dl class="params"><dt>参数</dt><dd>
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<tr><td class="paramname">a,b,c</td><td>三角形三顶点 </td></tr>
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<tr><td class="paramname">d</td><td>测试点 </td></tr>
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</dl>
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<dl class="section return"><dt>返回</dt><dd>圆测试结果 </dd></dl>
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<p class="definition">在文件 <a class="el" href="predicates_8h_source.html">predicates.h</a> 第 <a class="el" href="predicates_8h_source.html#l00049">49</a> 行定义.</p>
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<p class="reference">引用了 <a class="el" href="predicates_8h_source.html#l00100">vde::foundation::in_circle()</a>.</p>
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<p class="reference">被这些函数引用 <a class="el" href="predicates_8h_source.html#l00100">vde::foundation::in_circle()</a>.</p>
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<a id="adc7368ec2eb4d42239116aa7deb57772"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#adc7368ec2eb4d42239116aa7deb57772">◆ </a></span>orient_2d()</h2>
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<td class="memname">static <a class="el" href="group__foundation.html#gae42a60a99e11250a45ab0de45970c95f">exact::Orientation</a> vde::foundation::Predicates::orient_2d </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>a</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>b</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a1f8d721ed8c88d2b5716941d311f5945">Point2D</a> & </td>
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<td class="paramname"><em>c</em> </td>
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<td>)</td>
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<p>二维定向测试 </p>
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<dl class="params"><dt>参数</dt><dd>
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<table class="params">
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<tr><td class="paramname">a,b,c</td><td>三点 </td></tr>
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</dd>
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</dl>
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<dl class="section return"><dt>返回</dt><dd>定向结果 </dd></dl>
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<p class="definition">在文件 <a class="el" href="predicates_8h_source.html">predicates.h</a> 第 <a class="el" href="predicates_8h_source.html#l00031">31</a> 行定义.</p>
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<p class="reference">引用了 <a class="el" href="group__foundation.html#ga828aee5891f4f4059932951e63f116e9">vde::foundation::exact::orient_2d()</a>.</p>
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<p class="reference">被这些函数引用 <a class="el" href="predicates_8h_source.html#l00074">vde::foundation::orient()</a>.</p>
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<a id="a56f6d48fc9722cf6fe907b79b9c311d9"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a56f6d48fc9722cf6fe907b79b9c311d9">◆ </a></span>orient_3d()</h2>
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<td class="memname">static <a class="el" href="group__foundation.html#gae42a60a99e11250a45ab0de45970c95f">exact::Orientation</a> vde::foundation::Predicates::orient_3d </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> & </td>
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<td class="paramname"><em>a</em>, </td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> & </td>
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<td class="paramname"><em>b</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> & </td>
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<td class="paramname"><em>c</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="namespacevde_1_1foundation.html#a5897423053feaa32d249be526e9a1850">Point3D</a> & </td>
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<td class="paramname"><em>d</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>三维定向测试 </p>
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<dl class="params"><dt>参数</dt><dd>
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<table class="params">
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<tr><td class="paramname">a,b,c,d</td><td>四点 </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>返回</dt><dd>定向结果 </dd></dl>
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<p class="definition">在文件 <a class="el" href="predicates_8h_source.html">predicates.h</a> 第 <a class="el" href="predicates_8h_source.html#l00039">39</a> 行定义.</p>
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<p class="reference">引用了 <a class="el" href="group__foundation.html#ga2047f44bf458da6b9ea19fdda1a7a2a7">vde::foundation::exact::orient_3d()</a>.</p>
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<p class="reference">被这些函数引用 <a class="el" href="predicates_8h_source.html#l00087">vde::foundation::orient()</a>.</p>
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</div>
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</div>
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<hr/>该结构体的文档由以下文件生成:<ul>
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<li>include/vde/foundation/<a class="el" href="predicates_8h_source.html">predicates.h</a></li>
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<li class="footer">生成于 2026年 七月 24日 星期五 11:21:23 , 为 ViewDesignEngine使用 <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.1 </li>
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