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<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>
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