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<a href="classCGAL_1_1Circle__3-members.html">List of all members</a> |
<a href="#related">Related Functions</a> </div>
<div class="headertitle"><div class="title">CGAL::Circle_3< Kernel > Class Template Reference<div class="ingroups"><a class="el" href="group__PkgKernel23Ref.html">2D and 3D Linear Geometry Kernel Reference</a> » <a class="el" href="group__kernel__classes3.html">3D Kernel Objects</a></div></div></div>
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<p><code>#include <CGAL/Circle_3.h></code></p>
<a name="details" id="details"></a><h2 class="groupheader">Definition</h2>
<div class="textblock"><div class="compoundTemplParams">template<typename <a class="el" href="classKernel.html">Kernel</a>><br>
class CGAL::Circle_3< Kernel ></div><p>An object <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code> is a circle in the three-dimensional Euclidean space \( \E^3\). </p>
<p>Note that the circle can be degenerate, i.e. the squared radius may be zero.</p>
<dl>
<dt>Is model of</dt>
<dd><code><a class="el" href="classKernel_1_1Circle__3.html" title="A type representing circles in three dimensions.">Kernel::Circle_3</a></code> </dd>
</dl>
</div><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="related" name="related"></a>
Related Functions</h2></td></tr>
<tr><td class="ititle" colspan="2"><p>(Note that these are not member functions.) </p>
</td></tr>
<tr class="memitem:a505f603bd66859d13800dee107cdab40"><td class="memItemLeft" align="right" valign="top"><a id="a505f603bd66859d13800dee107cdab40" name="a505f603bd66859d13800dee107cdab40"></a>
bool </td><td class="memItemRight" valign="bottom"><b>operator==</b> (const <a class="el" href="classCGAL_1_1Circle__3.html">Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &c1, <a class="el" href="classCGAL_1_1Circle__3.html">Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> > const &c2)</td></tr>
<tr class="memdesc:a505f603bd66859d13800dee107cdab40"><td class="mdescLeft"> </td><td class="mdescRight">returns <code>true</code>, iff <code>c1</code> and <code>c2</code> are equal, i.e. if they have the same center, the same squared radius and the same supporting plane. <br></td></tr>
<tr class="separator:a505f603bd66859d13800dee107cdab40"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acb73994d5bba1e2c44d92c2c9fadb2c7"><td class="memItemLeft" align="right" valign="top"><a id="acb73994d5bba1e2c44d92c2c9fadb2c7" name="acb73994d5bba1e2c44d92c2c9fadb2c7"></a>
bool </td><td class="memItemRight" valign="bottom"><b>operator!=</b> (const <a class="el" href="classCGAL_1_1Circle__3.html">Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &c1, <a class="el" href="classCGAL_1_1Circle__3.html">Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> > const &c2)</td></tr>
<tr class="separator:acb73994d5bba1e2c44d92c2c9fadb2c7"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader">Creation</h2></td></tr>
<tr class="memitem:a0cd4d6bc664480266f32e01702396938"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a0cd4d6bc664480266f32e01702396938">Circle_3</a> (const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &<a class="el" href="classCGAL_1_1Circle__3.html#a079e622d8a96bf461cf3a1e9d9c3332b">center</a>, const Kernel::FT &sq_r, const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &plane)</td></tr>
<tr class="memdesc:a0cd4d6bc664480266f32e01702396938"><td class="mdescLeft"> </td><td class="mdescRight">introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. <br></td></tr>
<tr class="separator:a0cd4d6bc664480266f32e01702396938"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aabd7fd3cd82c8662b06216519177e09b"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#aabd7fd3cd82c8662b06216519177e09b">Circle_3</a> (const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &<a class="el" href="classCGAL_1_1Circle__3.html#a079e622d8a96bf461cf3a1e9d9c3332b">center</a>, const Kernel::FT &sq_r, const <a class="el" href="classCGAL_1_1Vector__3.html">Vector_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &n)</td></tr>
<tr class="memdesc:aabd7fd3cd82c8662b06216519177e09b"><td class="mdescLeft"> </td><td class="mdescRight">introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. <br></td></tr>
<tr class="separator:aabd7fd3cd82c8662b06216519177e09b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a628a1abf985776416995ea8a70820b8d"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a628a1abf985776416995ea8a70820b8d">Circle_3</a> (const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &p, const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &q, const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &r)</td></tr>
<tr class="memdesc:a628a1abf985776416995ea8a70820b8d"><td class="mdescLeft"> </td><td class="mdescRight">introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. <br></td></tr>
<tr class="separator:a628a1abf985776416995ea8a70820b8d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6cc99798ef4652e9abe5771dd1056706"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a6cc99798ef4652e9abe5771dd1056706">Circle_3</a> (const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &sphere1, const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &sphere2)</td></tr>
<tr class="memdesc:a6cc99798ef4652e9abe5771dd1056706"><td class="mdescLeft"> </td><td class="mdescRight">introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. <br></td></tr>
<tr class="separator:a6cc99798ef4652e9abe5771dd1056706"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af2d1bbbced58bdd8329f58db645f7ae3"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#af2d1bbbced58bdd8329f58db645f7ae3">Circle_3</a> (const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &sphere, const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &plane)</td></tr>
<tr class="memdesc:af2d1bbbced58bdd8329f58db645f7ae3"><td class="mdescLeft"> </td><td class="mdescRight">introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. <br></td></tr>
<tr class="separator:af2d1bbbced58bdd8329f58db645f7ae3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a806a827bff86590da42d656361fa7f72"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a806a827bff86590da42d656361fa7f72">Circle_3</a> (const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &plane, const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &sphere)</td></tr>
<tr class="memdesc:a806a827bff86590da42d656361fa7f72"><td class="mdescLeft"> </td><td class="mdescRight">introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. <br></td></tr>
<tr class="separator:a806a827bff86590da42d656361fa7f72"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader">Access Functions</h2></td></tr>
<tr class="memitem:a079e622d8a96bf461cf3a1e9d9c3332b"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a079e622d8a96bf461cf3a1e9d9c3332b">center</a> () const</td></tr>
<tr class="memdesc:a079e622d8a96bf461cf3a1e9d9c3332b"><td class="mdescLeft"> </td><td class="mdescRight">returns the center of <code>c</code>. <br></td></tr>
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<tr class="memitem:a0c3be69dd166a981c1777bcc2f41a9f5"><td class="memItemLeft" align="right" valign="top">const Kernel::FT & </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a0c3be69dd166a981c1777bcc2f41a9f5">squared_radius</a> () const</td></tr>
<tr class="memdesc:a0c3be69dd166a981c1777bcc2f41a9f5"><td class="mdescLeft"> </td><td class="mdescRight">returns the squared radius of <code>c</code>. <br></td></tr>
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<tr class="memitem:a5d4a043b4adb7a8af38fa0aa4d15292a"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a5d4a043b4adb7a8af38fa0aa4d15292a">supporting_plane</a> () const</td></tr>
<tr class="memdesc:a5d4a043b4adb7a8af38fa0aa4d15292a"><td class="mdescLeft"> </td><td class="mdescRight">returns the supporting plane of <code>c</code>. <br></td></tr>
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<tr class="memitem:a11a78143a91b99d7d133b2d8ee6366d9"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td><td class="memItemRight" valign="bottom"><a class="el" href="classCGAL_1_1Circle__3.html#a11a78143a91b99d7d133b2d8ee6366d9">diametral_sphere</a> () const</td></tr>
<tr class="memdesc:a11a78143a91b99d7d133b2d8ee6366d9"><td class="mdescLeft"> </td><td class="mdescRight">returns the diametral sphere of <code>c</code>. <br></td></tr>
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Kernel::FT const & </td><td class="memItemRight" valign="bottom"><b>area_divided_by_pi</b> () const</td></tr>
<tr class="memdesc:ac273e4679946f5c8ad46ecd7ec5c3d89"><td class="mdescLeft"> </td><td class="mdescRight">returns the area of <code>c</code>, divided by \( \pi\). <br></td></tr>
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double </td><td class="memItemRight" valign="bottom"><b>approximate_area</b> () const</td></tr>
<tr class="memdesc:a9978d715c99e17691bf18d288538518c"><td class="mdescLeft"> </td><td class="mdescRight">returns an approximation of the area of <code>c</code>. <br></td></tr>
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Kernel::FT </td><td class="memItemRight" valign="bottom"><b>squared_length_divided_by_pi_square</b> () const</td></tr>
<tr class="memdesc:a76c7c6bce3c8ba764998573a5dbe1ff5"><td class="mdescLeft"> </td><td class="mdescRight">returns the squared length of <code>c</code>, divided by \( \pi^2\). <br></td></tr>
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double </td><td class="memItemRight" valign="bottom"><b>approximate_squared_length</b> () const</td></tr>
<tr class="memdesc:a0fcaf1b03b57f332ffa3064ba4f849cc"><td class="mdescLeft"> </td><td class="mdescRight">returns an approximation of the squared length (i.e. perimeter) of <code>c</code>. <br></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader">Predicates</h2></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><b>has_on</b> (const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > &p) const</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader">Operations</h2></td></tr>
<tr class="memitem:af16e2a5b6a40221f8f6979cd1b4d92b1"><td class="memItemLeft" align="right" valign="top"><a id="af16e2a5b6a40221f8f6979cd1b4d92b1" name="af16e2a5b6a40221f8f6979cd1b4d92b1"></a>
<a class="el" href="classCGAL_1_1Bbox__3.html">Bbox_3</a> </td><td class="memItemRight" valign="bottom"><b>bbox</b> () const</td></tr>
<tr class="memdesc:af16e2a5b6a40221f8f6979cd1b4d92b1"><td class="mdescLeft"> </td><td class="mdescRight">returns a bounding box containing <code>c</code>. <br></td></tr>
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<h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a0cd4d6bc664480266f32e01702396938">◆ </a></span>Circle_3() <span class="overload">[1/6]</span></h2>
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template<typename <a class="el" href="classKernel.html">Kernel</a> > </div>
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<td class="memname"><a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::Circle_3 </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<td class="paramtype">const Kernel::FT & </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
<td class="paramname"><em>plane</em> </td>
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<p>introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. </p>
<p>It is initialized to the circle of center <code>center</code> and squared radius <code>sq_r</code> in plane <code>plane</code>. </p><dl class="section pre"><dt>Precondition</dt><dd><code>center</code> lies in <code>plane</code> and <code>sq_r >= 0</code>.</dd></dl>
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<dt>Exactness</dt>
<dd>This construction is trivial and therefore always exact in <code><a class="el" href="classCGAL_1_1Exact__predicates__inexact__constructions__kernel.html" title="A typedef to a kernel that has the following properties:">Exact_predicates_inexact_constructions_kernel</a></code>.</dd>
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<h2 class="memtitle"><span class="permalink"><a href="#aabd7fd3cd82c8662b06216519177e09b">◆ </a></span>Circle_3() <span class="overload">[2/6]</span></h2>
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<td class="memname"><a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::Circle_3 </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<td class="paramtype">const Kernel::FT & </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Vector__3.html">Vector_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<p>introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. </p>
<p>It is initialized to the circle of center <code>center</code> and squared radius <code>sq_r</code> in a plane normal to the vector <code>n</code>. </p><dl class="section pre"><dt>Precondition</dt><dd><code>sq_r >= 0</code>. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a628a1abf985776416995ea8a70820b8d">◆ </a></span>Circle_3() <span class="overload">[3/6]</span></h2>
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<td class="memname"><a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::Circle_3 </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
<td class="paramname"><em>q</em>, </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
<td class="paramname"><em>r</em> </td>
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<p>introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. </p>
<p>It is initialized to the circle passing through the three points. </p><dl class="section pre"><dt>Precondition</dt><dd>The three points are not collinear. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a6cc99798ef4652e9abe5771dd1056706">◆ </a></span>Circle_3() <span class="overload">[4/6]</span></h2>
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<td class="memname"><a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::Circle_3 </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
<td class="paramname"><em>sphere1</em>, </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
<td class="paramname"><em>sphere2</em> </td>
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<p>introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. </p>
<p>It is initialized to the circle along which the two spheres intersect. </p><dl class="section pre"><dt>Precondition</dt><dd>The two spheres intersect along a circle. </dd></dl>
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<td class="memname"><a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::Circle_3 </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<p>introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. </p>
<p>It is initialized to the circle along which the sphere and the plane intersect. </p><dl class="section pre"><dt>Precondition</dt><dd>The sphere and the plane intersect along a circle. </dd></dl>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<td class="paramtype">const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & </td>
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<p>introduces a variable <code>c</code> of type <code><a class="el" href="classCGAL_1_1Circle__3.html" title="An object c of type Circle_3 is a circle in the three-dimensional Euclidean space .">Circle_3</a></code>. </p>
<p>It is initialized to the circle along which the sphere and the plane intersect. </p><dl class="section pre"><dt>Precondition</dt><dd>The sphere and the plane intersect along a circle. </dd></dl>
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a079e622d8a96bf461cf3a1e9d9c3332b">◆ </a></span>center()</h2>
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<td class="memname">const <a class="el" href="classCGAL_1_1Point__3.html">Point_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & <a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::center </td>
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<p>returns the center of <code>c</code>. </p>
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<dt>Exactness</dt>
<dd>This construction is trivial and therefore always exact in <code><a class="el" href="classCGAL_1_1Exact__predicates__inexact__constructions__kernel.html" title="A typedef to a kernel that has the following properties:">Exact_predicates_inexact_constructions_kernel</a></code>.</dd>
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<h2 class="memtitle"><span class="permalink"><a href="#a11a78143a91b99d7d133b2d8ee6366d9">◆ </a></span>diametral_sphere()</h2>
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template<typename <a class="el" href="classKernel.html">Kernel</a> > </div>
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<td class="memname">const <a class="el" href="classCGAL_1_1Sphere__3.html">Sphere_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & <a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::diametral_sphere </td>
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<p>returns the diametral sphere of <code>c</code>. </p>
<dl class="section note">
<dt>Exactness</dt>
<dd>This construction is trivial and therefore always exact in <code><a class="el" href="classCGAL_1_1Exact__predicates__inexact__constructions__kernel.html" title="A typedef to a kernel that has the following properties:">Exact_predicates_inexact_constructions_kernel</a></code>.</dd>
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<h2 class="memtitle"><span class="permalink"><a href="#a0c3be69dd166a981c1777bcc2f41a9f5">◆ </a></span>squared_radius()</h2>
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template<typename <a class="el" href="classKernel.html">Kernel</a> > </div>
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<td class="memname">const Kernel::FT & <a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::squared_radius </td>
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<p>returns the squared radius of <code>c</code>. </p>
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<dt>Exactness</dt>
<dd>This construction is trivial and therefore always exact in <code><a class="el" href="classCGAL_1_1Exact__predicates__inexact__constructions__kernel.html" title="A typedef to a kernel that has the following properties:">Exact_predicates_inexact_constructions_kernel</a></code>.</dd>
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<h2 class="memtitle"><span class="permalink"><a href="#a5d4a043b4adb7a8af38fa0aa4d15292a">◆ </a></span>supporting_plane()</h2>
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template<typename <a class="el" href="classKernel.html">Kernel</a> > </div>
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<td class="memname">const <a class="el" href="classCGAL_1_1Plane__3.html">Plane_3</a>< <a class="el" href="classKernel.html">Kernel</a> > & <a class="el" href="classCGAL_1_1Circle__3.html">CGAL::Circle_3</a>< <a class="el" href="classKernel.html">Kernel</a> >::supporting_plane </td>
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<p>returns the supporting plane of <code>c</code>. </p>
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<dt>Exactness</dt>
<dd>This construction is trivial and therefore always exact in <code><a class="el" href="classCGAL_1_1Exact__predicates__inexact__constructions__kernel.html" title="A typedef to a kernel that has the following properties:">Exact_predicates_inexact_constructions_kernel</a></code>.</dd>
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