茂之钳
237 lines
17 KiB
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237 lines
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<div id="projectname">ViewDesignEngine
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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="#nested-classes">类</a> |
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<a href="#enum-members">枚举</a> </div>
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<div class="title">brep.h 文件参考<div class="ingroups"><a class="el" href="group__brep.html">B-Rep 模块 (vde::brep)</a></div></div> </div>
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<p>边界表示（B-Rep）核心数据结构
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<a href="#details">更多...</a></p>
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<div class="textblock"><code>#include "<a class="el" href="point_8h_source.html">vde/core/point.h</a>"</code><br />
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<code>#include "<a class="el" href="aabb_8h_source.html">vde/core/aabb.h</a>"</code><br />
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<code>#include "<a class="el" href="nurbs__curve_8h_source.html">vde/curves/nurbs_curve.h</a>"</code><br />
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<code>#include "<a class="el" href="nurbs__surface_8h_source.html">vde/curves/nurbs_surface.h</a>"</code><br />
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<code>#include "<a class="el" href="halfedge__mesh_8h_source.html">vde/mesh/halfedge_mesh.h</a>"</code><br />
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<code>#include <vector></code><br />
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<code>#include <memory></code><br />
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<code>#include <string></code><br />
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brep.h 的引用(Include)关系图:</div>
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此图展示该文件直接或间接的被哪些文件引用了:</div>
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<div class="center"><img src="brep_8h__dep__incl.png" border="0" usemap="#ainclude_2vde_2brep_2brep_8hdep" alt=""/></div>
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<p><a href="brep_8h_source.html">浏览源代码.</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
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类</h2></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1brep_1_1TopoVertex.html">vde::brep::TopoVertex</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">拓扑顶点 <a href="structvde_1_1brep_1_1TopoVertex.html#details">更多...</a><br /></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1brep_1_1TopoEdge.html">vde::brep::TopoEdge</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">拓扑边 <a href="structvde_1_1brep_1_1TopoEdge.html#details">更多...</a><br /></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1brep_1_1TopoLoop.html">vde::brep::TopoLoop</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">拓扑环（Loop） <a href="structvde_1_1brep_1_1TopoLoop.html#details">更多...</a><br /></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1brep_1_1TopoFace.html">vde::brep::TopoFace</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">拓扑面 <a href="structvde_1_1brep_1_1TopoFace.html#details">更多...</a><br /></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1brep_1_1TopoShell.html">vde::brep::TopoShell</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">拓扑壳 <a href="structvde_1_1brep_1_1TopoShell.html#details">更多...</a><br /></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvde_1_1brep_1_1TopoBody.html">vde::brep::TopoBody</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">拓扑体 <a href="structvde_1_1brep_1_1TopoBody.html#details">更多...</a><br /></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class  </td><td class="memItemRight" valign="bottom"><a class="el" href="classvde_1_1brep_1_1BrepModel.html">vde::brep::BrepModel</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">B-Rep 模型 <a href="classvde_1_1brep_1_1BrepModel.html#details">更多...</a><br /></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="namespaces"></a>
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命名空间</h2></td></tr>
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<tr class="memitem:namespacevde"><td class="memItemLeft" align="right" valign="top">  </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde.html">vde</a></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:namespacevde_1_1brep"><td class="memItemLeft" align="right" valign="top">  </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1brep.html">vde::brep</a></td></tr>
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<tr class="separator:"><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="enum-members"></a>
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枚举</h2></td></tr>
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<tr class="memitem:a8aaf8a85c867b16fa7b082a296f3cffb"><td class="memItemLeft" align="right" valign="top">enum class  </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffb">vde::brep::CurveType</a> { <br />
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  <a class="el" href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffba4803e6b9e63dabf04de980788d6a13c4">vde::brep::Line</a>
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, <a class="el" href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffba30954d90085f6eaaf5817917fc5fecb3">vde::brep::Circle</a>
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, <a class="el" href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffba31aa08a905ffdb74542a88cb7320c69d">vde::brep::Bezier</a>
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, <a class="el" href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffba828ce1e5157657c1792f0503c2d430db">vde::brep::BSpline</a>
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, <br />
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  <a class="el" href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffbae407f49a3a3e5006f4c62ef450560b06">vde::brep::Nurbs</a>
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<br />
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}</td></tr>
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<tr class="memdesc:a8aaf8a85c867b16fa7b082a296f3cffb"><td class="mdescLeft"> </td><td class="mdescRight">边曲线类型枚举 <a href="namespacevde_1_1brep.html#a8aaf8a85c867b16fa7b082a296f3cffb">更多...</a><br /></td></tr>
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<tr class="separator:a8aaf8a85c867b16fa7b082a296f3cffb"><td class="memSeparator" colspan="2"> </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>边界表示（B-Rep）核心数据结构 </p>
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<p>B-Rep（Boundary Representation）是 CAD 系统中最常用的实体表示方法， 通过拓扑层次结构描述三维几何体的边界。</p>
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<h2><a class="anchor" id="autotoc_md0"></a>
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拓扑层次结构</h2>
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<div class="fragment"><div class="line">Body (体) — 一个或多个封闭壳（含名称）</div>
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<div class="line"> └─ Shell (壳) — 一组面的连续集合</div>
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<div class="line"> └─ Face (面) — 曲面上由环界定的区域</div>
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<div class="line"> └─ Loop (环) — 封闭的边界曲线（外环 + 内环/孔）</div>
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<div class="line"> └─ Edge (边) — 曲面的边界段</div>
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<div class="line"> └─ Vertex (顶点) — 边的端点</div>
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</div><!-- fragment --><h2><a class="anchor" id="autotoc_md1"></a>
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实体引用关系</h2>
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<p>每个实体通过整数 ID 唯一标识。父实体通过 ID 向量引用子实体。 曲面（NURBS Surface）独立存储，由面通过 surface_id 引用。 曲线（NURBS Curve）作为边的几何定义存储。</p>
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<h2><a class="anchor" id="autotoc_md2"></a>
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使用模式</h2>
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<div class="fragment"><div class="line">BrepModel model;</div>
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<div class="line"><span class="comment">// 从顶点层开始构建</span></div>
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<div class="line"><span class="keywordtype">int</span> v0 = model.add_vertex(<a class="code" href="namespacevde_1_1core.html#ac6aed70c4b90d13f10217267cd7a1952">Point3D</a>(0, 0, 0));</div>
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<div class="line"><span class="keywordtype">int</span> v1 = model.add_vertex(<a class="code" href="namespacevde_1_1core.html#ac6aed70c4b90d13f10217267cd7a1952">Point3D</a>(1, 0, 0));</div>
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<div class="line"><span class="keywordtype">int</span> e0 = model.add_edge(v0, v1);</div>
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<div class="line"><span class="keywordtype">int</span> loop0 = model.add_loop({e0});</div>
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<div class="line"><span class="keywordtype">int</span> s0 = model.add_surface(plane_surface);</div>
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<div class="line"><span class="keywordtype">int</span> f0 = model.add_face(s0, {loop0});</div>
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<div class="line"><span class="keywordtype">int</span> shell0 = model.add_shell({f0});</div>
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<div class="line"><span class="keywordtype">int</span> body0 = model.add_body({shell0}, <span class="stringliteral">"MyPart"</span>);</div>
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<div class="ttc" id="anamespacevde_1_1core_html_ac6aed70c4b90d13f10217267cd7a1952"><div class="ttname"><a href="namespacevde_1_1core.html#ac6aed70c4b90d13f10217267cd7a1952">vde::core::Point3D</a></div><div class="ttdeci">foundation::Point3D Point3D</div><div class="ttdoc">双精度三维点（重新导出）</div><div class="ttdef"><b>Definition:</b> <a href="point_8h_source.html#l00031">point.h:31</a></div></div>
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</div><!-- fragment --><p>更常见的方式是使用 <a class="el" href="modeling_8h.html" title="高层 B-Rep 建模 API">modeling.h</a> 中的高层 API（make_box, extrude 等）。 </p>
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<p class="definition">在文件 <a class="el" href="brep_8h_source.html">brep.h</a> 中定义.</p>
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</div></div><!-- contents -->
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</div><!-- doc-content -->
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