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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<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 &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<-<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 &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><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 &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<=<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 &<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><=<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>0.</font> +00076 <font class="keywordflow">return</font> r2<=<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 &<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<=<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 &mat, CBSphere &<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> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |