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691 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="#enum-members">枚举</a> |
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<a href="#func-members">函数</a> </div>
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<div class="title">vde::boolean 命名空间参考</div> </div>
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枚举</h2></td></tr>
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<tr class="memitem:aae782fabf449b767ace57c8103c0e338"><td class="memItemLeft" align="right" valign="top">enum class  </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">BooleanOp</a> { <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338aaef12e903e606a4895a16b393bfdec8c">Union</a>
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, <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338aa06d31c2ee920b4d53e8c9c06d90ba24">Intersection</a>
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, <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338a28ed2ac6c29f64a3692c956004b8ff7a">Difference</a>
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, <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338ab3fff9b7882b88e6b08b2b3090df9de1">SymDiff</a>
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}</td></tr>
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<tr class="memdesc:aae782fabf449b767ace57c8103c0e338"><td class="mdescLeft"> </td><td class="mdescRight">布尔运算类型 <a href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">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="func-members"></a>
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函数</h2></td></tr>
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<tr class="memitem:a69d5b061d79bc7c23b1505c8340777a4"><td class="memItemLeft" align="right" valign="top">std::vector< <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#a69d5b061d79bc7c23b1505c8340777a4">boolean_2d</a> (const <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> &a, const <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> &b, <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">BooleanOp</a> op)</td></tr>
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<tr class="memdesc:a69d5b061d79bc7c23b1505c8340777a4"><td class="mdescLeft"> </td><td class="mdescRight">二维多边形布尔运算 <a href="namespacevde_1_1boolean.html#a69d5b061d79bc7c23b1505c8340777a4">更多...</a><br /></td></tr>
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<tr class="separator:a69d5b061d79bc7c23b1505c8340777a4"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a9804b327a1a811593f7129610e2ab1f6"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6">mesh_union</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b)</td></tr>
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<tr class="memdesc:a9804b327a1a811593f7129610e2ab1f6"><td class="mdescLeft"> </td><td class="mdescRight">网格并集 A ∪ B <a href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6">更多...</a><br /></td></tr>
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<tr class="separator:a9804b327a1a811593f7129610e2ab1f6"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:abf255b50c00a9aa991020eb39e800457"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#abf255b50c00a9aa991020eb39e800457">mesh_intersection</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b)</td></tr>
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<tr class="memdesc:abf255b50c00a9aa991020eb39e800457"><td class="mdescLeft"> </td><td class="mdescRight">网格交集 A ∩ B <a href="namespacevde_1_1boolean.html#abf255b50c00a9aa991020eb39e800457">更多...</a><br /></td></tr>
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<tr class="memitem:ab0f79ea9f7f8d2a91329531d2d99e1c3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3">mesh_difference</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b)</td></tr>
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<tr class="memdesc:ab0f79ea9f7f8d2a91329531d2d99e1c3"><td class="mdescLeft"> </td><td class="mdescRight">网格差集 A − B <a href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3">更多...</a><br /></td></tr>
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<tr class="memitem:ae1b0c6f707a5c6cbe829bed5083264fa"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#ae1b0c6f707a5c6cbe829bed5083264fa">mesh_sym_diff</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b)</td></tr>
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<tr class="memdesc:ae1b0c6f707a5c6cbe829bed5083264fa"><td class="mdescLeft"> </td><td class="mdescRight">网格对称差 (A − B) ∪ (B − A) <a href="namespacevde_1_1boolean.html#ae1b0c6f707a5c6cbe829bed5083264fa">更多...</a><br /></td></tr>
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<tr class="separator:ae1b0c6f707a5c6cbe829bed5083264fa"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ad45e2570a6b46624ecc43ccb18e22bac"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#ad45e2570a6b46624ecc43ccb18e22bac">clip_mesh</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b, bool invert_b=false)</td></tr>
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<tr class="memdesc:ad45e2570a6b46624ecc43ccb18e22bac"><td class="mdescLeft"> </td><td class="mdescRight">用网格 B 裁剪网格 A <a href="namespacevde_1_1boolean.html#ad45e2570a6b46624ecc43ccb18e22bac">更多...</a><br /></td></tr>
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<tr class="separator:ad45e2570a6b46624ecc43ccb18e22bac"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ab7facd7c849be2a97b1e53e8c4602d5c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#ab7facd7c849be2a97b1e53e8c4602d5c">invert_mesh</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &m)</td></tr>
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<tr class="memdesc:ab7facd7c849be2a97b1e53e8c4602d5c"><td class="mdescLeft"> </td><td class="mdescRight">翻转网格所有面片的法线方向 <a href="namespacevde_1_1boolean.html#ab7facd7c849be2a97b1e53e8c4602d5c">更多...</a><br /></td></tr>
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<tr class="memitem:ae638bb18b0580e662c700358dfbd0dac"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#ae638bb18b0580e662c700358dfbd0dac">merge_meshes</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b)</td></tr>
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<tr class="memdesc:ae638bb18b0580e662c700358dfbd0dac"><td class="mdescLeft"> </td><td class="mdescRight">合并两个网格 <a href="namespacevde_1_1boolean.html#ae638bb18b0580e662c700358dfbd0dac">更多...</a><br /></td></tr>
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<tr class="separator:ae638bb18b0580e662c700358dfbd0dac"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a80fa9af2671c97412c95a8a9d592a20c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#a80fa9af2671c97412c95a8a9d592a20c">mesh_boolean</a> (const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &a, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &b, <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">BooleanOp</a> op)</td></tr>
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<tr class="memdesc:a80fa9af2671c97412c95a8a9d592a20c"><td class="mdescLeft"> </td><td class="mdescRight">网格布尔运算统一接口 <a href="namespacevde_1_1boolean.html#a80fa9af2671c97412c95a8a9d592a20c">更多...</a><br /></td></tr>
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<tr class="memitem:a35fbe67095edde181fb1f0911d04ae11"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#a35fbe67095edde181fb1f0911d04ae11">is_point_inside_mesh</a> (const <a class="el" href="namespacevde_1_1core.html#ac6aed70c4b90d13f10217267cd7a1952">core::Point3D</a> &p, const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> &mesh)</td></tr>
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<tr class="memdesc:a35fbe67095edde181fb1f0911d04ae11"><td class="mdescLeft"> </td><td class="mdescRight">判断三维点是否在封闭网格内部 <a href="namespacevde_1_1boolean.html#a35fbe67095edde181fb1f0911d04ae11">更多...</a><br /></td></tr>
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<tr class="memitem:a5498aa6722f88e30d5d824c8de391be1"><td class="memItemLeft" align="right" valign="top">std::vector< <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespacevde_1_1boolean.html#a5498aa6722f88e30d5d824c8de391be1">polygon_offset</a> (const <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> &poly, double distance)</td></tr>
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<tr class="memdesc:a5498aa6722f88e30d5d824c8de391be1"><td class="mdescLeft"> </td><td class="mdescRight">多边形等距偏移 <a href="namespacevde_1_1boolean.html#a5498aa6722f88e30d5d824c8de391be1">更多...</a><br /></td></tr>
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<h2 class="groupheader">枚举类型说明</h2>
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<a id="aae782fabf449b767ace57c8103c0e338"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#aae782fabf449b767ace57c8103c0e338">◆ </a></span>BooleanOp</h2>
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<td class="mlabels-left">
|
|||
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<table class="memname">
|
|||
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<tr>
|
|||
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<td class="memname">enum <a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">vde::boolean::BooleanOp</a></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">strong</span></span> </td>
|
|||
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</tr>
|
|||
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</table>
|
|||
|
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</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>布尔运算类型 </p>
|
|||
|
|
<table class="fieldtable">
|
|||
|
|
<tr><th colspan="2">枚举值</th></tr><tr><td class="fieldname"><a id="aae782fabf449b767ace57c8103c0e338aaef12e903e606a4895a16b393bfdec8c"></a>Union </td><td class="fielddoc"><p>并集 A ∪ B </p>
|
|||
|
|
</td></tr>
|
|||
|
|
<tr><td class="fieldname"><a id="aae782fabf449b767ace57c8103c0e338aa06d31c2ee920b4d53e8c9c06d90ba24"></a>Intersection </td><td class="fielddoc"><p>交集 A ∩ B </p>
|
|||
|
|
</td></tr>
|
|||
|
|
<tr><td class="fieldname"><a id="aae782fabf449b767ace57c8103c0e338a28ed2ac6c29f64a3692c956004b8ff7a"></a>Difference </td><td class="fielddoc"><p>差集 A − B </p>
|
|||
|
|
</td></tr>
|
|||
|
|
<tr><td class="fieldname"><a id="aae782fabf449b767ace57c8103c0e338ab3fff9b7882b88e6b08b2b3090df9de1"></a>SymDiff </td><td class="fielddoc"><p>对称差 (A − B) ∪ (B − A) </p>
|
|||
|
|
</td></tr>
|
|||
|
|
</table>
|
|||
|
|
|
|||
|
|
<p class="definition">在文件 <a class="el" href="boolean__2d_8h_source.html">boolean_2d.h</a> 第 <a class="el" href="boolean__2d_8h_source.html#l00022">22</a> 行定义.</p>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<h2 class="groupheader">函数说明</h2>
|
|||
|
|
<a id="a69d5b061d79bc7c23b1505c8340777a4"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#a69d5b061d79bc7c23b1505c8340777a4">◆ </a></span>boolean_2d()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname">std::vector<<a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a>> vde::boolean::boolean_2d </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> & </td>
|
|||
|
|
<td class="paramname"><em>a</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> & </td>
|
|||
|
|
<td class="paramname"><em>b</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype"><a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">BooleanOp</a> </td>
|
|||
|
|
<td class="paramname"><em>op</em> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>二维多边形布尔运算 </p>
|
|||
|
|
<p>对两个简单多边形执行指定布尔操作。 当前实现：基于 Vatti 算法的边行走方式处理凸多边形， 可扩展支持任意简单多边形（含孔洞）。</p>
|
|||
|
|
<p>算法流程：</p><ol type="1">
|
|||
|
|
<li>找到两条多边形的所有交点</li>
|
|||
|
|
<li>跟踪边界根据布尔操作选择进入/退出边</li>
|
|||
|
|
<li>组装结果多边形</li>
|
|||
|
|
</ol>
|
|||
|
|
<dl class="section note"><dt>注解</dt><dd>当前版本优化了凸多边形路径。对于带孔洞或自交的 复杂多边形，建议先三角剖分或使用 mesh_boolean。</dd></dl>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>第一个多边形 </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>第二个多边形 </td></tr>
|
|||
|
|
<tr><td class="paramname">op</td><td>布尔操作类型 </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>结果多边形列表（可能有多个分离的组件）</dd></dl>
|
|||
|
|
<div class="fragment"><div class="line">Polygon2D p1 = make_circle(10, <a class="code" href="namespacevde_1_1core.html#a78483c599a40e4f333418667a77e3862">Point2D</a>{0,0}, 5.0);</div>
|
|||
|
|
<div class="line">Polygon2D p2 = make_circle(10, <a class="code" href="namespacevde_1_1core.html#a78483c599a40e4f333418667a77e3862">Point2D</a>{3,0}, 5.0);</div>
|
|||
|
|
<div class="line"><span class="keyword">auto</span> result = <a class="code" href="namespacevde_1_1boolean.html#a69d5b061d79bc7c23b1505c8340777a4">boolean_2d</a>(p1, p2, <a class="code" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338aaef12e903e606a4895a16b393bfdec8c">BooleanOp::Union</a>);</div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_a69d5b061d79bc7c23b1505c8340777a4"><div class="ttname"><a href="namespacevde_1_1boolean.html#a69d5b061d79bc7c23b1505c8340777a4">vde::boolean::boolean_2d</a></div><div class="ttdeci">std::vector< Polygon2D > boolean_2d(const Polygon2D &a, const Polygon2D &b, BooleanOp op)</div><div class="ttdoc">二维多边形布尔运算</div></div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_aae782fabf449b767ace57c8103c0e338aaef12e903e606a4895a16b393bfdec8c"><div class="ttname"><a href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338aaef12e903e606a4895a16b393bfdec8c">vde::boolean::BooleanOp::Union</a></div><div class="ttdeci">@ Union</div></div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1core_html_a78483c599a40e4f333418667a77e3862"><div class="ttname"><a href="namespacevde_1_1core.html#a78483c599a40e4f333418667a77e3862">vde::core::Point2D</a></div><div class="ttdeci">foundation::Point2D Point2D</div><div class="ttdoc">双精度二维点（重新导出）</div><div class="ttdef"><b>Definition:</b> <a href="point_8h_source.html#l00029">point.h:29</a></div></div>
|
|||
|
|
</div><!-- fragment --><dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338" title="布尔运算类型">BooleanOp</a>, <a class="el" href="namespacevde_1_1boolean.html#a80fa9af2671c97412c95a8a9d592a20c" title="网格布尔运算统一接口">mesh_boolean</a>, <a class="el" href="namespacevde_1_1boolean.html#a5498aa6722f88e30d5d824c8de391be1" title="多边形等距偏移">polygon_offset</a> </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<a id="ad45e2570a6b46624ecc43ccb18e22bac"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#ad45e2570a6b46624ecc43ccb18e22bac">◆ </a></span>clip_mesh()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::clip_mesh </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>a</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>b</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">bool </td>
|
|||
|
|
<td class="paramname"><em>invert_b</em> = <code>false</code> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>用网格 B 裁剪网格 A </p>
|
|||
|
|
<p>保留网格 A 中位于 B 体外的面片。 是 mesh_difference 的简化变体，仅输出来自 A 的面片。</p>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>待裁剪网格 </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>裁剪体网格 </td></tr>
|
|||
|
|
<tr><td class="paramname">invert_b</td><td>若为 true，将 B 的内外判定取反（裁剪外部） </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>裁剪后的网格（仅包含 A 的面片）</dd></dl>
|
|||
|
|
<div class="fragment"><div class="line"><span class="comment">// 裁剪 cube 外部的 sphere 面片</span></div>
|
|||
|
|
<div class="line"><span class="keyword">auto</span> clipped = <a class="code" href="namespacevde_1_1boolean.html#ad45e2570a6b46624ecc43ccb18e22bac">clip_mesh</a>(<a class="code" href="namespacevde_1_1sdf.html#ab544a3ebc4c0844b322b73bbbe4efb3f">sphere</a>, cube, <span class="keyword">false</span> <span class="comment">// invert_b);</span></div>
|
|||
|
|
<div class="line"><span class="comment">// 保留 cube 内部的 sphere 面片</span></div>
|
|||
|
|
<div class="line"><span class="keyword">auto</span> inner = <a class="code" href="namespacevde_1_1boolean.html#ad45e2570a6b46624ecc43ccb18e22bac">clip_mesh</a>(<a class="code" href="namespacevde_1_1sdf.html#ab544a3ebc4c0844b322b73bbbe4efb3f">sphere</a>, cube, <span class="keyword">true</span> <span class="comment">// invert_b);</span></div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_ad45e2570a6b46624ecc43ccb18e22bac"><div class="ttname"><a href="namespacevde_1_1boolean.html#ad45e2570a6b46624ecc43ccb18e22bac">vde::boolean::clip_mesh</a></div><div class="ttdeci">HalfedgeMesh clip_mesh(const HalfedgeMesh &a, const HalfedgeMesh &b, bool invert_b=false)</div><div class="ttdoc">用网格 B 裁剪网格 A</div></div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1sdf_html_ab544a3ebc4c0844b322b73bbbe4efb3f"><div class="ttname"><a href="namespacevde_1_1sdf.html#ab544a3ebc4c0844b322b73bbbe4efb3f">vde::sdf::sphere</a></div><div class="ttdeci">double sphere(const Point3D &p, double radius)</div><div class="ttdoc">球体的 SDF</div><div class="ttdef"><b>Definition:</b> <a href="sdf__primitives_8h_source.html#l00068">sdf_primitives.h:68</a></div></div>
|
|||
|
|
</div><!-- fragment --><dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a>, <a class="el" href="namespacevde_1_1boolean.html#a35fbe67095edde181fb1f0911d04ae11" title="判断三维点是否在封闭网格内部">is_point_inside_mesh</a> </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<a id="ab7facd7c849be2a97b1e53e8c4602d5c"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#ab7facd7c849be2a97b1e53e8c4602d5c">◆ </a></span>invert_mesh()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::invert_mesh </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>m</em></td><td>)</td>
|
|||
|
|
<td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>翻转网格所有面片的法线方向 </p>
|
|||
|
|
<p>遍历所有面片，反转其顶点环绕顺序。 常用于生成负体积（反向外壳）或差集操作中。</p>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">m</td><td>原始网格 </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>法线翻转后的网格</dd></dl>
|
|||
|
|
<dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a> </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<a id="a35fbe67095edde181fb1f0911d04ae11"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#a35fbe67095edde181fb1f0911d04ae11">◆ </a></span>is_point_inside_mesh()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname">bool vde::boolean::is_point_inside_mesh </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="namespacevde_1_1core.html#ac6aed70c4b90d13f10217267cd7a1952">core::Point3D</a> & </td>
|
|||
|
|
<td class="paramname"><em>p</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>mesh</em> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>判断三维点是否在封闭网格内部 </p>
|
|||
|
|
<p>使用射线投射法：从点 p 向任意方向射出射线， 统计与网格面片的交点数量。 奇数表示在内部，偶数表示在外部。</p>
|
|||
|
|
<p>算法：</p><ol type="1">
|
|||
|
|
<li>构造从 p 出发沿 +x 方向的射线</li>
|
|||
|
|
<li>遍历所有三角形进行射线-三角形求交</li>
|
|||
|
|
<li>统计交点数量</li>
|
|||
|
|
<li>返回奇偶性判定结果</li>
|
|||
|
|
</ol>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">p</td><td>待判定点 </td></tr>
|
|||
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<tr><td class="paramname">mesh</td><td>封闭网格 </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>点在网格内部返回 true</dd></dl>
|
|||
|
|
<dl class="section note"><dt>注解</dt><dd>网格必须是封闭（水密）的，否则结果不可靠。 点恰好落在面上时行为未定义。</dd></dl>
|
|||
|
|
<dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#ad45e2570a6b46624ecc43ccb18e22bac" title="用网格 B 裁剪网格 A">clip_mesh</a>, <a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a> </dd></dl>
|
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|
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|
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</div>
|
|||
|
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</div>
|
|||
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<a id="ae638bb18b0580e662c700358dfbd0dac"></a>
|
|||
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<h2 class="memtitle"><span class="permalink"><a href="#ae638bb18b0580e662c700358dfbd0dac">◆ </a></span>merge_meshes()</h2>
|
|||
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<div class="memitem">
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|||
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<div class="memproto">
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<table class="memname">
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<tr>
|
|||
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<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::merge_meshes </td>
|
|||
|
|
<td>(</td>
|
|||
|
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<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
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<td class="paramname"><em>a</em>, </td>
|
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|
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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="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</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></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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</div><div class="memdoc">
|
|||
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|||
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<p>合并两个网格 </p>
|
|||
|
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<p>将两个网格的顶点和面片直接拼接，不做布尔操作。 用于将分离的网格组件合并到单个数据结构中。</p>
|
|||
|
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<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>网格 A </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>网格 B </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>包含 A 和 B 全部顶点和面片的合并网格</dd></dl>
|
|||
|
|
<dl class="section note"><dt>注解</dt><dd>不处理重叠区域；仅做纯几何拼接</dd></dl>
|
|||
|
|
<dl class="section see"><dt>参见</dt><dd>mesh_union（做布尔合并） </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
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<a id="a80fa9af2671c97412c95a8a9d592a20c"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#a80fa9af2671c97412c95a8a9d592a20c">◆ </a></span>mesh_boolean()</h2>
|
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<div class="memitem">
|
|||
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<div class="memproto">
|
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<table class="memname">
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|||
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<tr>
|
|||
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<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::mesh_boolean </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>a</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>b</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype"><a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338">BooleanOp</a> </td>
|
|||
|
|
<td class="paramname"><em>op</em> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>网格布尔运算统一接口 </p>
|
|||
|
|
<p>根据布尔操作类型分发到对应的具体函数。</p>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>网格 A </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>网格 B </td></tr>
|
|||
|
|
<tr><td class="paramname">op</td><td>布尔操作类型 </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>结果网格</dd></dl>
|
|||
|
|
<div class="fragment"><div class="line"><span class="keyword">auto</span> result = <a class="code" href="namespacevde_1_1boolean.html#a80fa9af2671c97412c95a8a9d592a20c">mesh_boolean</a>(cube, <a class="code" href="namespacevde_1_1sdf.html#ab544a3ebc4c0844b322b73bbbe4efb3f">sphere</a>, <a class="code" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338aa06d31c2ee920b4d53e8c9c06d90ba24">BooleanOp::Intersection</a>);</div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_a80fa9af2671c97412c95a8a9d592a20c"><div class="ttname"><a href="namespacevde_1_1boolean.html#a80fa9af2671c97412c95a8a9d592a20c">vde::boolean::mesh_boolean</a></div><div class="ttdeci">HalfedgeMesh mesh_boolean(const HalfedgeMesh &a, const HalfedgeMesh &b, BooleanOp op)</div><div class="ttdoc">网格布尔运算统一接口</div></div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_aae782fabf449b767ace57c8103c0e338aa06d31c2ee920b4d53e8c9c06d90ba24"><div class="ttname"><a href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338aa06d31c2ee920b4d53e8c9c06d90ba24">vde::boolean::BooleanOp::Intersection</a></div><div class="ttdeci">@ Intersection</div></div>
|
|||
|
|
</div><!-- fragment --><dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#aae782fabf449b767ace57c8103c0e338" title="布尔运算类型">BooleanOp</a>, <a class="el" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6" title="网格并集 A ∪ B">mesh_union</a>, <a class="el" href="namespacevde_1_1boolean.html#abf255b50c00a9aa991020eb39e800457" title="网格交集 A ∩ B">mesh_intersection</a>, <a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a>, <a class="el" href="namespacevde_1_1boolean.html#ae1b0c6f707a5c6cbe829bed5083264fa" title="网格对称差 (A − B) ∪ (B − A)">mesh_sym_diff</a> </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<a id="ab0f79ea9f7f8d2a91329531d2d99e1c3"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#ab0f79ea9f7f8d2a91329531d2d99e1c3">◆ </a></span>mesh_difference()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::mesh_difference </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>a</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>b</em> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>网格差集 A − B </p>
|
|||
|
|
<p>保留网格 A 中重心在网格 B 外的面片， 以及网格 B 中重心在网格 A 内的面片（翻转法线）。</p>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>网格 A </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>网格 B </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>A − B 的差集网格</dd></dl>
|
|||
|
|
<dl class="section note"><dt>注解</dt><dd>结果中来自 B 的面片会被翻转法线以保持内-外一致性</dd></dl>
|
|||
|
|
<dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6" title="网格并集 A ∪ B">mesh_union</a>, <a class="el" href="namespacevde_1_1boolean.html#abf255b50c00a9aa991020eb39e800457" title="网格交集 A ∩ B">mesh_intersection</a>, <a class="el" href="namespacevde_1_1boolean.html#ae1b0c6f707a5c6cbe829bed5083264fa" title="网格对称差 (A − B) ∪ (B − A)">mesh_sym_diff</a> </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<a id="abf255b50c00a9aa991020eb39e800457"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#abf255b50c00a9aa991020eb39e800457">◆ </a></span>mesh_intersection()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::mesh_intersection </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>a</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>b</em> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>网格交集 A ∩ B </p>
|
|||
|
|
<p>保留网格 A 中重心在网格 B 内的面片， 以及网格 B 中重心在网格 A 内的面片。</p>
|
|||
|
|
<dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>网格 A </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>网格 B </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>A ∩ B 的交集网格</dd></dl>
|
|||
|
|
<dl class="section note"><dt>注解</dt><dd>结果体积为两网格公共区域</dd></dl>
|
|||
|
|
<dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6" title="网格并集 A ∪ B">mesh_union</a>, <a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a> </dd></dl>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<a id="ae1b0c6f707a5c6cbe829bed5083264fa"></a>
|
|||
|
|
<h2 class="memtitle"><span class="permalink"><a href="#ae1b0c6f707a5c6cbe829bed5083264fa">◆ </a></span>mesh_sym_diff()</h2>
|
|||
|
|
|
|||
|
|
<div class="memitem">
|
|||
|
|
<div class="memproto">
|
|||
|
|
<table class="memname">
|
|||
|
|
<tr>
|
|||
|
|
<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::mesh_sym_diff </td>
|
|||
|
|
<td>(</td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>a</em>, </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td class="paramkey"></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
|
|||
|
|
<td class="paramname"><em>b</em> </td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td>)</td>
|
|||
|
|
<td></td><td></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div><div class="memdoc">
|
|||
|
|
|
|||
|
|
<p>网格对称差 (A − B) ∪ (B − A) </p>
|
|||
|
|
<p>等价于： </p><div class="fragment"><div class="line"><a class="code" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6">mesh_union</a>(<a class="code" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3">mesh_difference</a>(a, b), <a class="code" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3">mesh_difference</a>(b, a))</div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_a9804b327a1a811593f7129610e2ab1f6"><div class="ttname"><a href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6">vde::boolean::mesh_union</a></div><div class="ttdeci">HalfedgeMesh mesh_union(const HalfedgeMesh &a, const HalfedgeMesh &b)</div><div class="ttdoc">网格并集 A ∪ B</div></div>
|
|||
|
|
<div class="ttc" id="anamespacevde_1_1boolean_html_ab0f79ea9f7f8d2a91329531d2d99e1c3"><div class="ttname"><a href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3">vde::boolean::mesh_difference</a></div><div class="ttdeci">HalfedgeMesh mesh_difference(const HalfedgeMesh &a, const HalfedgeMesh &b)</div><div class="ttdoc">网格差集 A − B</div></div>
|
|||
|
|
</div><!-- fragment --><dl class="params"><dt>参数</dt><dd>
|
|||
|
|
<table class="params">
|
|||
|
|
<tr><td class="paramname">a</td><td>网格 A </td></tr>
|
|||
|
|
<tr><td class="paramname">b</td><td>网格 B </td></tr>
|
|||
|
|
</table>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
<dl class="section return"><dt>返回</dt><dd>对称差网格</dd></dl>
|
|||
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<dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a>, <a class="el" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6" title="网格并集 A ∪ B">mesh_union</a> </dd></dl>
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<a id="a9804b327a1a811593f7129610e2ab1f6"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a9804b327a1a811593f7129610e2ab1f6">◆ </a></span>mesh_union()</h2>
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<div class="memitem">
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<table class="memname">
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<td class="memname"><a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> vde::boolean::mesh_union </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</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="classvde_1_1mesh_1_1HalfedgeMesh.html">HalfedgeMesh</a> & </td>
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<td class="paramname"><em>b</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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</table>
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</div><div class="memdoc">
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<p>网格并集 A ∪ B </p>
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<p>保留网格 A 中重心在网格 B 外的面片， 以及网格 B 中重心在网格 A 外的面片。 合并后形成两个网格的并集体积。</p>
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<p>原理：对每个面片计算重心坐标，用射线投射判断 该点是否在对方网格内部，据此决定保留或剔除。</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</td><td>网格 A </td></tr>
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<tr><td class="paramname">b</td><td>网格 B </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>A ∪ B 的合并网格</dd></dl>
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<div class="fragment"><div class="line">HalfedgeMesh result = <a class="code" href="namespacevde_1_1boolean.html#a9804b327a1a811593f7129610e2ab1f6">mesh_union</a>(cube, <a class="code" href="namespacevde_1_1sdf.html#ab544a3ebc4c0844b322b73bbbe4efb3f">sphere</a>);</div>
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</div><!-- fragment --><dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#abf255b50c00a9aa991020eb39e800457" title="网格交集 A ∩ B">mesh_intersection</a>, <a class="el" href="namespacevde_1_1boolean.html#ab0f79ea9f7f8d2a91329531d2d99e1c3" title="网格差集 A − B">mesh_difference</a>, <a class="el" href="namespacevde_1_1boolean.html#a35fbe67095edde181fb1f0911d04ae11" title="判断三维点是否在封闭网格内部">is_point_inside_mesh</a> </dd></dl>
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<a id="a5498aa6722f88e30d5d824c8de391be1"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a5498aa6722f88e30d5d824c8de391be1">◆ </a></span>polygon_offset()</h2>
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<div class="memitem">
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<td class="memname">std::vector<<a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a>> vde::boolean::polygon_offset </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="classvde_1_1core_1_1Polygon2D.html">Polygon2D</a> & </td>
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<td class="paramname"><em>poly</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">double </td>
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<td class="paramname"><em>distance</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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</table>
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</div><div class="memdoc">
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<p>多边形等距偏移 </p>
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<p>将多边形的每条边沿其法线方向平移指定距离， 在转角处自动生成圆弧/斜角连接。</p>
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<p>算法：</p><ol type="1">
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<li>对每条边计算单位外法线</li>
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<li>沿法线平移 distance 距离</li>
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<li>相邻偏移边求交形成新的顶点</li>
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<li>检测自交并移除退化区域</li>
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</ol>
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<ul>
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<li>正距离 = 外扩（膨胀/Inflation）</li>
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<li>负距离 = 内缩（偏置/Deflation）</li>
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</ul>
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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">poly</td><td>原始多边形 </td></tr>
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<tr><td class="paramname">distance</td><td>偏移距离（正=外扩，负=内缩） </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>偏移后的多边形列表（内缩或自交可能产生多个碎片）</dd></dl>
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<dl class="section note"><dt>注解</dt><dd>使用直骨架近似而非精确圆弧偏移，转角处为斜角连接。 大距离负偏移可能导致多边形完全消失（返回空列表）。</dd></dl>
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<div class="fragment"><div class="line">Polygon2D rect = {{0,0}, {10,0}, {10,5}, {0,5}};</div>
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<div class="line"><span class="comment">// 外扩 2 单位</span></div>
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<div class="line"><span class="keyword">auto</span> inflated = <a class="code" href="namespacevde_1_1boolean.html#a5498aa6722f88e30d5d824c8de391be1">polygon_offset</a>(rect, 2.0);</div>
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<div class="line"><span class="comment">// 内缩 1 单位（生成工具路径）</span></div>
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<div class="line"><span class="keyword">auto</span> toolpath = <a class="code" href="namespacevde_1_1boolean.html#a5498aa6722f88e30d5d824c8de391be1">polygon_offset</a>(rect, -1.0);</div>
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<div class="ttc" id="anamespacevde_1_1boolean_html_a5498aa6722f88e30d5d824c8de391be1"><div class="ttname"><a href="namespacevde_1_1boolean.html#a5498aa6722f88e30d5d824c8de391be1">vde::boolean::polygon_offset</a></div><div class="ttdeci">std::vector< Polygon2D > polygon_offset(const Polygon2D &poly, double distance)</div><div class="ttdoc">多边形等距偏移</div></div>
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</div><!-- fragment --><dl class="section see"><dt>参见</dt><dd><a class="el" href="namespacevde_1_1boolean.html#a69d5b061d79bc7c23b1505c8340777a4" title="二维多边形布尔运算">boolean_2d</a> </dd></dl>
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