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<div class="headertitle"><div class="title">Polyhedron/polyhedron_prog_cube.cpp</div></div>
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<div class="fragment"><div class="line"><span class="preprocessor">#include <CGAL/Simple_cartesian.h></span></div>
<div class="line"><span class="preprocessor">#include <CGAL/Polyhedron_3.h></span></div>
<div class="line"><span class="preprocessor">#include <iostream></span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">template</span> <<span class="keyword">class</span> Poly></div>
<div class="line"><span class="keyword">typename</span> Poly::Halfedge_handle make_cube_3( Poly& P) {</div>
<div class="line"> <span class="comment">// appends a cube of size [0,1]^3 to the polyhedron P.</span></div>
<div class="line"> CGAL_precondition( P.is_valid());</div>
<div class="line"> <span class="keyword">typedef</span> <span class="keyword">typename</span> Poly::Point_3 Point;</div>
<div class="line"> <span class="keyword">typedef</span> <span class="keyword">typename</span> Poly::Halfedge_handle Halfedge_handle;</div>
<div class="line"> Halfedge_handle h = P.make_tetrahedron( Point( 1, 0, 0),</div>
<div class="line"> Point( 0, 0, 1),</div>
<div class="line"> Point( 0, 0, 0),</div>
<div class="line"> Point( 0, 1, 0));</div>
<div class="line"> Halfedge_handle g = h->next()->opposite()->next(); <span class="comment">// Fig. (a)</span></div>
<div class="line"> P.split_edge( h->next());</div>
<div class="line"> P.split_edge( g->next());</div>
<div class="line"> P.split_edge( g); <span class="comment">// Fig. (b)</span></div>
<div class="line"> h->next()->vertex()->point() = Point( 1, 0, 1);</div>
<div class="line"> g->next()->vertex()->point() = Point( 0, 1, 1);</div>
<div class="line"> g->opposite()->vertex()->point() = Point( 1, 1, 0); <span class="comment">// Fig. (c)</span></div>
<div class="line"> Halfedge_handle f = P.split_facet( g->next(),</div>
<div class="line"> g->next()->next()->next()); <span class="comment">// Fig. (d)</span></div>
<div class="line"> Halfedge_handle e = P.split_edge( f);</div>
<div class="line"> e->vertex()->point() = Point( 1, 1, 1); <span class="comment">// Fig. (e)</span></div>
<div class="line"> P.split_facet( e, f->next()->next()); <span class="comment">// Fig. (f)</span></div>
<div class="line"> CGAL_postcondition( P.is_valid());</div>
<div class="line"> <span class="keywordflow">return</span> h;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keyword">typedef</span> <a id="_a0" name="_a0"></a><a class="code hl_structRef" href="../Kernel_23/structCGAL_1_1Simple__cartesian.html">CGAL::Simple_cartesian<double></a> <a class="code hl_namespaceRef" href="../Kernel_23/namespaceKernel.html">Kernel</a>;</div>
<div class="line"><span class="keyword">typedef</span> <a id="_a1" name="_a1"></a><a class="code hl_class" href="classCGAL_1_1Polyhedron__3.html">CGAL::Polyhedron_3<Kernel></a> Polyhedron;</div>
<div class="line"><span class="keyword">typedef</span> Polyhedron::Halfedge_handle Halfedge_handle;</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main() {</div>
<div class="line"> Polyhedron P;</div>
<div class="line"> Halfedge_handle h = make_cube_3( P);</div>
<div class="line"> <span class="keywordflow">return</span> (P.is_tetrahedron(h) ? 1 : 0);</div>
<div class="line">}</div>
<div class="ttc" id="aclassCGAL_1_1Polyhedron__3_html"><div class="ttname"><a href="classCGAL_1_1Polyhedron__3.html">CGAL::Polyhedron_3</a></div><div class="ttdoc">A polyhedral surface Polyhedron_3 consists of vertices V, edges E, facets F and an incidence relation...</div><div class="ttdef"><b>Definition:</b> Polyhedron_3.h:113</div></div>
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<div class="ttc" id="astructCGAL_1_1Simple__cartesian_html"><div class="ttname"><a href="../Kernel_23/structCGAL_1_1Simple__cartesian.html">CGAL::Simple_cartesian</a></div></div>
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