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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>bounding_box.cpp</h1><a href="bounding__box_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 2000, 2001 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="stdsound_8h.html">stdsound.h</a>"</font> +00027 +00028 <font class="preprocessor">#include "<a class="code" href="bounding__box_8h.html">bounding_box.h</a>"</font> +00029 <font class="preprocessor">#include "<a class="code" href="plane_8h.html">nel/misc/plane.h</a>"</font> +00030 +00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC; +00032 +00033 <font class="keyword">namespace </font>NLSOUND { +00034 +00035 +00036 <font class="comment">/*</font> +00037 <font class="comment"> * Constructor</font> +00038 <font class="comment"> */</font> +<a name="l00039"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a0">00039</a> CBoundingBox::CBoundingBox() : _Rx(0.0f), _Ry(0.0f), _Rz(0.0f), _Center(CVector::Null) +00040 { +00041 } +00042 +00043 +00044 <font class="comment">/*</font> +00045 <font class="comment"> * Does the box include a point ?</font> +00046 <font class="comment"> */</font> +00047 <font class="keywordtype">bool</font> CBoundingBox::include( <font class="keyword">const</font> CVector& pos )<font class="keyword"> const</font> +00048 <font class="keyword"></font>{ +00049 <font class="keywordflow">if</font> ( pos.x < <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a> ) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00050 <font class="keywordflow">if</font> ( pos.x > <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a> ) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00051 <font class="keywordflow">if</font> ( pos.y < <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a> ) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00052 <font class="keywordflow">if</font> ( pos.y > <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a> ) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00053 <font class="keywordflow">if</font> ( pos.z < <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a> ) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00054 <font class="keywordflow">if</font> ( pos.z > <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a> ) <font class="keywordflow">return</font> <font class="keyword">false</font>; +00055 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00056 } +00057 +00058 +00059 <font class="comment">/*</font> +00060 <font class="comment"> * Return the environment size</font> +00061 <font class="comment"> */</font> +<a name="l00062"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a2">00062</a> <font class="keywordtype">float</font> CBoundingBox::getDiameter()<font class="keyword"> const</font> +00063 <font class="keyword"></font>{ +00064 <font class="comment">// Set it to the average of the three widths (?)</font> +00065 <font class="keywordflow">return</font> (<a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a>+<a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a>+<a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a>) / 1.5f; +00066 } +00067 +00068 +00069 <font class="comment">/*</font> +00070 <font class="comment"> * Return the radius at the intersection of the shape and the line between the specified position and the center of the shape</font> +00071 <font class="comment"> */</font> +<a name="l00072"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a3">00072</a> <font class="keywordtype">float</font> CBoundingBox::getRadiusAtIntersect( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& pos )<font class="keyword"> const</font> +00073 <font class="keyword"></font>{ +00074 <font class="keywordflow">return</font> 0.0f; +00075 } +00076 +00077 +00078 <font class="comment">/*</font> +00079 <font class="comment"> *</font> +00080 <font class="comment"> */</font> +<a name="l00081"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a9">00081</a> CVector CBoundingBox::getIntersectWithLine( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& c, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& p )<font class="keyword"> const</font> +00082 <font class="keyword"></font>{ +00083 <font class="comment">// 1. Build 6 planes made up of the box</font> +00084 CPlane pl[6]; +00085 CVector ppos = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>; +00086 ppos.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a>; +00087 pl[0].make( CVector::I, ppos ); +00088 ppos.x = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a>; +00089 pl[1].make( -CVector::I, ppos ); +00090 ppos.x = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>; +00091 ppos.y = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a>; +00092 pl[2].make( CVector::J, ppos ); +00093 ppos.y = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a>; +00094 pl[3].make( -CVector::J, ppos ); +00095 ppos.y = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>; +00096 ppos.z = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a>; +00097 pl[4].make( CVector::K, ppos ); +00098 ppos.z = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a>; +00099 pl[5].make( -CVector::K, ppos ); +00100 +00101 <font class="comment">// 2. Maximize the length of the segment to be greater than the size of the box (>=sqrt(3))</font> +00102 CVector <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a> = (p-c).normed(); +00103 <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a> *= std::max( std::max( <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a>, <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a> ), <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a> ) * 10.0f; +00104 CVector pfar = c + <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>; +00105 +00106 <font class="comment">// 3. Clip</font> +00107 CVector center = c; +00108 <a class="code" href="types__nl_8h.html#a14">uint</a> i; +00109 <font class="keywordflow">for</font> ( i=0; i!=6; ++i ) +00110 { +00111 pl[i].clipSegmentBack( center, pfar ); +00112 } +00113 +00114 <font class="keywordflow">return</font> pfar; +00115 } +00116 +00117 +00118 <font class="comment">/* Return the ratio of a point between this shape and another inner shape.</font> +00119 <font class="comment"> * The point must be included in this shape (the outer one) and not</font> +00120 <font class="comment"> * in the inner shape.</font> +00121 <font class="comment"> * If the point is near this shape, the ratio is near 0.</font> +00122 <font class="comment"> * If the point is near the inner shape, the ratio is near 1.</font> +00123 <font class="comment"> */</font> +<a name="l00124"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a7">00124</a> <font class="keywordtype">float</font> CBoundingBox::getRatio( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& pos, IBoundingShape *inner )<font class="keyword"> const</font> +00125 <font class="keyword"></font>{ +00126 <font class="comment">/* TEMP: works only with 2 boxes</font> +00127 <font class="comment"> *</font> +00128 <font class="comment"> */</font> +00129 +00130 <font class="comment">// Let C be the center of the inner shape, P the position of the point</font> +00131 +00132 <font class="comment">// 1. Get the intersection A between [CP] and the inner shape</font> +00133 CVector posa = inner->getIntersectWithLine( inner->getCenter(), pos ); +00134 +00135 <font class="comment">// 2. Get the intersection B between (CP) and the outer shape (this)</font> +00136 CVector posb = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#a9">getIntersectWithLine</a>( inner->getCenter(), pos ); +00137 +00138 <font class="comment">// 3. Compute PB / AB</font> +00139 <font class="keywordtype">float</font> ab = (posa-posb).<a class="code" href="classNLMISC_1_1CVector.html#z327_2">norm</a>(); +00140 <font class="keywordflow">if</font> ( ab != 0 ) +00141 { +00142 <font class="keywordtype">float</font> pb = (pos-posb).norm(); +00143 <font class="keywordflow">return</font> pb / ab; +00144 } +00145 <font class="keywordflow">else</font> +00146 { +00147 <font class="keywordflow">return</font> 1.0f; +00148 } +00149 } +00150 +00151 +00152 <font class="comment">/*</font> +00153 <font class="comment"> * Return the corners (EDIT)</font> +00154 <font class="comment"> */</font> +<a name="l00155"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a10">00155</a> <font class="keywordtype">void</font> CBoundingBox::getCorners( <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& c1, <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& c2 ) +00156 { +00157 c1.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a>; +00158 c1.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a>; +00159 c1.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> - <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a>; +00160 c2.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a>; +00161 c2.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a>; +00162 c2.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> = <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> + <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a>; +00163 } +00164 +00165 <font class="comment">/*</font> +00166 <font class="comment"> * Set the corners (the corners must be ordered: 1 has smaller x, y, z) (EDIT)</font> +00167 <font class="comment"> */</font> +<a name="l00168"></a><a class="code" href="classNLSOUND_1_1CBoundingBox.html#a11">00168</a> <font class="keywordtype">void</font> CBoundingBox::setCorners( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& c1, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>& c2 ) +00169 { +00170 <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> = (c1.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>+c2.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>)/2.0f; +00171 <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = (c1.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>+c2.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>)/2.0f; +00172 <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o3">_Center</a>.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> = (c1.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>+c2.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>)/2.0f; +00173 <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o0">_Rx</a> = (c2.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>-c1.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>)/2.0f; +00174 <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o1">_Ry</a> = (c2.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>-c1.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>)/2.0f; +00175 <a class="code" href="classNLSOUND_1_1CBoundingBox.html#o2">_Rz</a> = (c2.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>-c1.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>)/2.0f; +00176 } +00177 +00178 +00179 } <font class="comment">// NLSOUND</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> |