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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>aabbox.cpp</h1><a href="aabbox_cpp.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="aabbox_h.html">nel/3d/aabbox.h</a>"</font> +00027 <font class="preprocessor">#include "<a class="code" href="polygon_h.html">nel/3d/polygon.h</a>"</font> +00028 +00029 +00030 <font class="keyword">namespace</font> NL3D { +00031 +00032 +00033 <font class="comment">// ***************************************************************************</font> +<a name="l00034"></a><a class="code" href="class_NL3D__CAABBox.html#a12">00034</a> <font class="keywordtype">bool</font> CAABBox::clipFront(<font class="keyword">const</font> CPlane &p)<font class="keyword"> const +</font>00035 <font class="keyword"></font>{ +00036 CVector hswap; +00037 +00038 <font class="comment">// The bbox is front of the plane if only one of his vertex is in front.</font> +00039 <font class="keywordflow">if</font>(p*(Center + HalfSize) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00040 <font class="keywordflow">if</font>(p*(Center - HalfSize) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00041 hswap.set(-HalfSize.x, HalfSize.y, HalfSize.z); +00042 <font class="keywordflow">if</font>(p*(Center + hswap) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00043 <font class="keywordflow">if</font>(p*(Center - hswap) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00044 hswap.set(HalfSize.x, -HalfSize.y, HalfSize.z); +00045 <font class="keywordflow">if</font>(p*(Center + hswap) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00046 <font class="keywordflow">if</font>(p*(Center - hswap) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00047 hswap.set(HalfSize.x, HalfSize.y, -HalfSize.z); +00048 <font class="keywordflow">if</font>(p*(Center + hswap) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00049 <font class="keywordflow">if</font>(p*(Center - hswap) > 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00050 +00051 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00052 } +00053 <font class="comment">// ***************************************************************************</font> +<a name="l00054"></a><a class="code" href="class_NL3D__CAABBox.html#a13">00054</a> <font class="keywordtype">bool</font> CAABBox::clipBack(<font class="keyword">const</font> CPlane &p)<font class="keyword"> const +</font>00055 <font class="keyword"></font>{ +00056 CVector hswap; +00057 +00058 <font class="comment">// The bbox is back of the plane if only one of his vertex is in back.</font> +00059 <font class="keywordflow">if</font>(p*(Center + HalfSize) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00060 <font class="keywordflow">if</font>(p*(Center - HalfSize) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00061 hswap.set(-HalfSize.x, HalfSize.y, HalfSize.z); +00062 <font class="keywordflow">if</font>(p*(Center + hswap) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00063 <font class="keywordflow">if</font>(p*(Center - hswap) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00064 hswap.set(HalfSize.x, -HalfSize.y, HalfSize.z); +00065 <font class="keywordflow">if</font>(p*(Center + hswap) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00066 <font class="keywordflow">if</font>(p*(Center - hswap) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00067 hswap.set(HalfSize.x, HalfSize.y, -HalfSize.z); +00068 <font class="keywordflow">if</font>(p*(Center + hswap) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00069 <font class="keywordflow">if</font>(p*(Center - hswap) < 0) <font class="keywordflow">return</font> <font class="keyword">true</font>; +00070 +00071 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00072 } +00073 +00074 +00075 <font class="comment">// ***************************************************************************</font> +<a name="l00076"></a><a class="code" href="class_NL3D__CAABBox.html#a14">00076</a> <font class="keywordtype">bool</font> CAABBox::include(<font class="keyword">const</font> CVector &a)<font class="keyword"> const +</font>00077 <font class="keyword"></font>{ +00078 <font class="keywordflow">if</font>(Center.x+HalfSize.x<a.x) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00079 <font class="keywordflow">if</font>(Center.x-HalfSize.x>a.x) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00080 <font class="keywordflow">if</font>(Center.y+HalfSize.y<a.y) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00081 <font class="keywordflow">if</font>(Center.y-HalfSize.y>a.y) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00082 <font class="keywordflow">if</font>(Center.z+HalfSize.z<a.z) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00083 <font class="keywordflow">if</font>(Center.z-HalfSize.z>a.z) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00084 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00085 } +00086 +00087 +00088 <font class="comment">// ***************************************************************************</font> +<a name="l00089"></a><a class="code" href="class_NL3D__CAABBox.html#a15">00089</a> <font class="keywordtype">bool</font> CAABBox::intersect(<font class="keyword">const</font> CVector &a, <font class="keyword">const</font> CVector &b, <font class="keyword">const</font> CVector &c)<font class="keyword"> const +</font>00090 <font class="keyword"></font>{ +00091 <font class="comment">// Trivial test.</font> +00092 <font class="keywordflow">if</font>(include(a) || include(b) || include(c)) +00093 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00094 <font class="comment">// Else, must test if the polygon intersect the pyamid.</font> +00095 CPlane planes[6]; +00096 makePyramid(planes); +00097 CPolygon poly(a,b,c); +00098 poly.clip(planes, 6); +00099 <font class="keywordflow">if</font>(poly.getNumVertices()==0) +00100 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00101 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00102 } +00103 +00104 +00105 <font class="comment">// ***************************************************************************</font> +<a name="l00106"></a><a class="code" href="class_NL3D__CAABBox.html#a16">00106</a> <font class="keywordtype">void</font> CAABBox::makePyramid(CPlane planes[6])<font class="keyword"> const +</font>00107 <font class="keyword"></font>{ +00108 planes[0].make(CVector(-1,0,0), Center-HalfSize); +00109 planes[1].make(CVector(+1,0,0), Center+HalfSize); +00110 planes[2].make(CVector(0,-1,0), Center-HalfSize); +00111 planes[3].make(CVector(0,+1,0), Center+HalfSize); +00112 planes[4].make(CVector(0,0,-1), Center-HalfSize); +00113 planes[5].make(CVector(0,0,+1), Center+HalfSize); +00114 } +00115 +00116 +00117 <font class="comment">// ***************************************************************************</font> +<a name="l00118"></a><a class="code" href="class_NL3D__CAABBox.html#a17">00118</a> <font class="keywordtype">void</font> CAABBox::serial(<a class="code" href="class_NLMISC__IStream.html">NLMISC::IStream</a> &f)<font class="keyword"> +</font>00119 <font class="keyword"></font>{ +00120 uint ver= f.<a class="code" href="class_NLMISC__IStream.html#a36">serialVersion</a>(0); +00121 f.<a class="code" href="class_NLMISC__IStream.html#a3">serial</a>(Center); +00122 f.<a class="code" href="class_NLMISC__IStream.html#a3">serial</a>(HalfSize); +00123 } +00124 +00125 +00126 <font class="comment">// ***************************************************************************</font> +<a name="l00127"></a><a class="code" href="class_NL3D__CAABBox.html#a5">00127</a> <font class="keywordtype">void</font> CAABBox::extend(<font class="keyword">const</font> CVector &v)<font class="keyword"> +</font>00128 <font class="keyword"></font>{ +00129 CVector bmin= getMin(), bmax= getMax(); +00130 +00131 bmin.minof(bmin, v); +00132 bmax.maxof(bmax, v); +00133 setMinMax(bmin, bmax); +00134 } +00135 +00136 +00137 <font class="comment">// ***************************************************************************</font> +<a name="l00138"></a><a class="code" href="class_NL3D__CAABBoxExt.html#a13">00138</a> <font class="keywordtype">bool</font> CAABBoxExt::clipFront(<font class="keyword">const</font> CPlane &p)<font class="keyword"> const +</font>00139 <font class="keyword"></font>{ +00140 <font class="comment">// Assume normalized planes.</font> +00141 +00142 <font class="comment">// if( SpherMax OUT ) return false.</font> +00143 <font class="keywordtype">float</font> d= p*Center; +00144 <font class="keywordflow">if</font>(d<-RadiusMax) +00145 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00146 <font class="comment">// if( SphereMin IN ) return true;</font> +00147 <font class="keywordflow">if</font>(d>-RadiusMin) +00148 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00149 +00150 <font class="comment">// else, standard clip box.</font> +00151 <font class="keywordflow">return</font> CAABBox::clipFront(p); +00152 } +00153 +00154 +00155 <font class="comment">// ***************************************************************************</font> +<a name="l00156"></a><a class="code" href="class_NL3D__CAABBoxExt.html#a14">00156</a> <font class="keywordtype">bool</font> CAABBoxExt::clipBack(<font class="keyword">const</font> CPlane &p)<font class="keyword"> const +</font>00157 <font class="keyword"></font>{ +00158 <font class="comment">// Assume normalized planes.</font> +00159 +00160 <font class="comment">// if( SpherMax OUT ) return false.</font> +00161 <font class="keywordtype">float</font> d= p*Center; +00162 <font class="keywordflow">if</font>(d>RadiusMax) +00163 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00164 <font class="comment">// if( SphereMin IN ) return true;</font> +00165 <font class="keywordflow">if</font>(d<RadiusMin) +00166 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00167 +00168 <font class="comment">// else, standard clip box.</font> +00169 <font class="keywordflow">return</font> CAABBox::clipBack(p); +00170 } +00171 +00172 +00173 <font class="comment">// ***************************************************************************</font> +<a name="l00174"></a><a class="code" href="class_NL3D__CAABBoxExt.html#a16">00174</a> <font class="keywordtype">void</font> CAABBoxExt::serial(<a class="code" href="class_NLMISC__IStream.html">NLMISC::IStream</a> &f)<font class="keyword"> +</font>00175 <font class="keyword"></font>{ +00176 CAABBox::serial(f); +00177 <font class="keywordflow">if</font>(f.<a class="code" href="class_NLMISC__IStream.html#a2">isReading</a>()) +00178 updateRadius(); +00179 } +00180 +00181 +00182 } <font class="comment">// NL3D</font> +</div></pre> + +<!-- 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> |