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+<hr><h1>bsphere.cpp</h1><a href="bsphere_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
+00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font>
+00008 <font class="comment"> *</font>
+00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
+00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
+00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
+00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
+00013 <font class="comment"> * any later version.</font>
+00014 <font class="comment"></font>
+00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
+00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
+00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
+00018 <font class="comment"> * General Public License for more details.</font>
+00019 <font class="comment"></font>
+00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
+00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
+00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
+00023 <font class="comment"> * MA 02111-1307, USA.</font>
+00024 <font class="comment"> */</font>
+00025
+00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font>
+00027
+00028 <font class="preprocessor">#include "<a class="code" href="bsphere_8h.html">nel/misc/bsphere.h</a>"</font>
+00029
+00030 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
+00031 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
+00032
+00033
+00034 <font class="keyword">namespace </font>NLMISC {
+00035
+00036
+<a name="l00037"></a><a class="code" href="classNLMISC_1_1CBSphere.html#z279_0">00037</a> <font class="keywordtype">bool</font> CBSphere::clipFront(<font class="keyword">const</font> CPlane &amp;p)<font class="keyword"> const</font>
+00038 <font class="keyword"></font>{
+00039 <font class="comment">// assume normalized planes.</font>
+00040
+00041 <font class="comment">// if( SpherMax OUT ) return false.</font>
+00042 <font class="keywordtype">float</font> d= p*<a class="code" href="classNLMISC_1_1CBSphere.html#m0">Center</a>;
+00043 <font class="keywordflow">if</font>(d&lt;-<a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>)
+00044 <font class="keywordflow">return</font> <font class="keyword">false</font>;
+00045
+00046 <font class="keywordflow">return</font> <font class="keyword">true</font>;
+00047 }
+00048
+00049
+<a name="l00050"></a><a class="code" href="classNLMISC_1_1CBSphere.html#z279_1">00050</a> <font class="keywordtype">bool</font> CBSphere::clipBack(<font class="keyword">const</font> CPlane &amp;p)<font class="keyword"> const</font>
+00051 <font class="keyword"></font>{
+00052 <font class="comment">// assume normalized planes.</font>
+00053
+00054 <font class="comment">// if( SpherMax OUT ) return false.</font>
+00055 <font class="keywordtype">float</font> d= p*<a class="code" href="classNLMISC_1_1CBSphere.html#m0">Center</a>;
+00056 <font class="keywordflow">if</font>(d&gt;<a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>)
+00057 <font class="keywordflow">return</font> <font class="keyword">false</font>;
+00058
+00059 <font class="keywordflow">return</font> <font class="keyword">true</font>;
+00060 }
+00061
+00062
+<a name="l00063"></a><a class="code" href="classNLMISC_1_1CBSphere.html#a2">00063</a> <font class="keywordtype">bool</font> CBSphere::include(<font class="keyword">const</font> CVector &amp;p)<font class="keyword"> const</font>
+00064 <font class="keyword"></font>{
+00065 <font class="keywordtype">float</font> r2= (p-<a class="code" href="classNLMISC_1_1CBSphere.html#m0">Center</a>).sqrnorm();
+00066 <font class="keywordflow">return</font> (r2&lt;=<a class="code" href="namespaceNLMISC.html#a214">sqr</a>(<a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>));
+00067 }
+00068
+<a name="l00069"></a><a class="code" href="classNLMISC_1_1CBSphere.html#a3">00069</a> <font class="keywordtype">bool</font> CBSphere::include(<font class="keyword">const</font> CBSphere &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>)<font class="keyword"> const</font>
+00070 <font class="keyword"></font>{
+00071 <font class="comment">// if smaller than s, how could we include it???</font>
+00072 <font class="keywordflow">if</font>(<a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>&lt;=<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>.Radius)
+00073 <font class="keywordflow">return</font> <font class="keyword">false</font>;
+00074 <font class="keywordtype">float</font> r2= (<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>.Center-<a class="code" href="classNLMISC_1_1CBSphere.html#m0">Center</a>).sqrnorm();
+00075 <font class="comment">// Because of prec test, Radius-s.Radius&gt;0.</font>
+00076 <font class="keywordflow">return</font> r2&lt;=<a class="code" href="namespaceNLMISC.html#a214">sqr</a>(<a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>-<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>.Radius);
+00077 }
+00078
+<a name="l00079"></a><a class="code" href="classNLMISC_1_1CBSphere.html#a4">00079</a> <font class="keywordtype">bool</font> CBSphere::intersect(<font class="keyword">const</font> CBSphere &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>)<font class="keyword"> const</font>
+00080 <font class="keyword"></font>{
+00081 <font class="keywordtype">float</font> r2= (<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>.Center-<a class="code" href="classNLMISC_1_1CBSphere.html#m0">Center</a>).sqrnorm();
+00082
+00083 <font class="keywordflow">return</font> r2&lt;=<a class="code" href="namespaceNLMISC.html#a214">sqr</a>(<a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>.Radius);
+00084
+00085 }
+00086
+00087
+<a name="l00088"></a><a class="code" href="classNLMISC_1_1CBSphere.html#z278_0">00088</a> <font class="keywordtype">void</font> CBSphere::applyTransform(<font class="keyword">const</font> CMatrix &amp;mat, CBSphere &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a400">res</a>)
+00089 {
+00090 <a class="code" href="driver__opengl__extension__def_8h.html#a400">res</a>.Center= mat*<a class="code" href="classNLMISC_1_1CBSphere.html#m0">Center</a>;
+00091
+00092 <font class="keywordflow">if</font>(!mat.hasScalePart())
+00093 <a class="code" href="driver__opengl__extension__def_8h.html#a400">res</a>.Radius= <a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>;
+00094 <font class="keywordflow">else</font>
+00095 {
+00096 <font class="keywordflow">if</font>(mat.hasScaleUniform())
+00097 <a class="code" href="driver__opengl__extension__def_8h.html#a400">res</a>.Radius= <a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a>*mat.getScaleUniform();
+00098 <font class="keywordflow">else</font>
+00099 {
+00100 <font class="comment">// must compute max of 3 axis.</font>
+00101 <font class="keywordtype">float</font> m, mx;
+00102 CVector i,j,k;
+00103 i= mat.getI();
+00104 j= mat.getJ();
+00105 k= mat.getK();
+00106 <font class="comment">// take the max of the 3 axis.</font>
+00107 m= i.sqrnorm();
+00108 mx= m;
+00109 m= j.sqrnorm();
+00110 mx= max(m, mx);
+00111 m= k.sqrnorm();
+00112 mx= max(m, mx);
+00113
+00114 <font class="comment">// result.</font>
+00115 <a class="code" href="driver__opengl__extension__def_8h.html#a400">res</a>.Radius= <a class="code" href="classNLMISC_1_1CBSphere.html#m1">Radius</a> * (float)sqrt(mx);
+00116 }
+00117 }
+00118 }
+00119
+00120
+00121 } <font class="comment">// NLMISC</font>
+</pre></div>
+
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