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<hr><h1>ps_util.h</h1><a href="ps__util_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 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">#ifndef NL_PS_UTIL_H</font>
00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_PS_UTIL_H</font>
00028 <font class="preprocessor"></font>
00029 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="aabbox_8h.html">nel/misc/aabbox.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="vector_8h.html">nel/misc/vector.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="rgba_8h.html">nel/misc/rgba.h</a>"</font>
00033 
00034 
00035 
00036 <font class="keyword">namespace </font>NLMISC
00037 {
00038         <font class="keyword">class </font>CMatrix;
00039         <font class="keyword">class </font>NLMISC::CVector;
00040 };
00041 
00042 namespace NL3D 
00043 {
00044 
00045 
00046         <font class="keyword">class </font>CFontGenerator;
00047         <font class="keyword">class </font>CFontManager;
00048         <font class="keyword">class </font>IDriver;
00049 
00050 
<a name="l00057"></a><a class="code" href="structNL3D_1_1CPSUtil.html">00057</a> <font class="keyword">struct </font>CPSUtil
00058 {
00059 <font class="keyword">public</font>:
00061 
00062         <font class="keyword">static</font> <font class="keywordtype">void</font> registerSerialParticleSystem(<font class="keywordtype">void</font>);
00063 
00065 
00066         <font class="keyword">static</font> <font class="keywordtype">void</font> displayBBox(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> *driver, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CAABBox.html">NLMISC::CAABBox</a> &amp;box, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> col = <a class="code" href="classNLMISC_1_1CRGBA.html#p7">NLMISC::CRGBA::White</a>);
00067 
00069         <font class="keyword">static</font> <font class="keywordtype">void</font> displaySphere(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> &amp;driver, <font class="keywordtype">float</font> radius, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;center, uint nbSubdiv = 4, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> color = <a class="code" href="classNLMISC_1_1CRGBA.html#p7">NLMISC::CRGBA::White</a>);
00070 
00071 
00075         <font class="keyword">static</font> <font class="keywordtype">void</font> displayDisc(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> &amp;driver, <font class="keywordtype">float</font> radius, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;center, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CMatrix.html">NLMISC::CMatrix</a> &amp;mat, uint nbSubdiv = 32, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> color = <a class="code" href="classNLMISC_1_1CRGBA.html#p7">NLMISC::CRGBA::White</a>);
00076 
00077 
00081         <font class="keyword">static</font> <font class="keywordtype">void</font> displayCylinder(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> &amp;driver, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;center, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CMatrix.html">NLMISC::CMatrix</a> &amp;mat, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;dim, uint nbSubdiv = 32, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> color = <a class="code" href="classNLMISC_1_1CRGBA.html#p7">NLMISC::CRGBA::White</a>);
00082 
00084         <font class="keyword">static</font> <font class="keywordtype">void</font> display3DQuad(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> &amp;driver, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;c1, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;c2
00085                                                                 ,<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;c3,  <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;c4, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> color = <a class="code" href="classNLMISC_1_1CRGBA.html#p7">NLMISC::CRGBA::White</a>);
00086                                                         
00087 
00089         <font class="keyword">inline</font> <font class="keyword">static</font> <font class="keywordtype">void</font> addRadiusToAABBox(<a class="code" href="classNLMISC_1_1CAABBox.html">NLMISC::CAABBox</a> &amp;box, <font class="keywordtype">float</font> radius);
00090          
00092         <font class="keyword">static</font> <font class="keywordtype">void</font> displayBasis(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> *driver, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CMatrix.html">NLMISC::CMatrix</a> &amp;modelMat, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CMatrix.html">NLMISC::CMatrix</a> &amp;m, <font class="keywordtype">float</font> size, CFontGenerator &amp;fg, CFontManager &amp;fm);
00093 
00094 
00105         <font class="keyword">static</font> <font class="keywordtype">void</font> displayArrow(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> *driver, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;start, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>, <font class="keywordtype">float</font> size, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> col1, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> col2);
00106 
00108         <font class="keyword">static</font> <font class="keywordtype">void</font> print(<a class="code" href="classNL3D_1_1IDriver.html">NL3D::IDriver</a> *driver, <font class="keyword">const</font> std::string &amp;text, CFontGenerator &amp;fg, CFontManager &amp;fm, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;pos, <font class="keywordtype">float</font> size);
00109 
00110 
00115         <font class="keyword">static</font> <font class="keywordtype">void</font> buildSchmidtBasis(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;v, <a class="code" href="classNLMISC_1_1CMatrix.html">NLMISC::CMatrix</a> &amp;dest);  
00116 
00117 
<a name="l00121"></a><a class="code" href="structNL3D_1_1CPSUtil.html#d11">00121</a>         <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">float</font> getCos(sint32 angle) 
00122         { 
00123                 <a class="code" href="debug_8h.html#a6">nlassert</a>(_CosTableInitialized == <font class="keyword">true</font>);
00124                 <font class="keywordflow">return</font> _CosTable[angle &amp; 0xff];
00125         }
00126 
<a name="l00130"></a><a class="code" href="structNL3D_1_1CPSUtil.html#d12">00130</a>         <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">float</font> getSin(sint32 angle) 
00131         { 
00132                 <a class="code" href="debug_8h.html#a6">nlassert</a>(_CosTableInitialized == <font class="keyword">true</font>);
00133                 <font class="keywordflow">return</font> _SinTable[angle &amp; 0xff];
00134         }
00135 
00139         <font class="keyword">static</font> <font class="keywordtype">void</font> initFastCosNSinTable(<font class="keywordtype">void</font>);
00140 
00141 
00146         <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">float</font> buildPerlinNoise(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;pos, uint nbOctaves);
00147 
00151         <font class="keyword">static</font> <font class="keywordtype">void</font> initPerlinNoiseTable(<font class="keywordtype">void</font>);
00152                 
00153 
00154 <font class="keyword">private</font>:        
00155         <font class="keyword">static</font> <font class="keywordtype">void</font> registerForces();
00156         <font class="keyword">static</font> <font class="keywordtype">void</font> registerParticles();
00157         <font class="keyword">static</font> <font class="keywordtype">void</font> registerEmitters();
00158         <font class="keyword">static</font> <font class="keywordtype">void</font> registerZones();
00159         <font class="keyword">static</font> <font class="keywordtype">void</font> registerAttribs();
00160 
00161         <font class="keyword">static</font> <font class="keywordtype">bool</font> _CosTableInitialized;       
00162         <font class="keyword">static</font> <font class="keywordtype">bool</font> _PerlinNoiseTableInitialized;       
00163         <font class="comment">// a table for fast cosine lookup</font>
00164         <font class="keyword">static</font> <font class="keywordtype">float</font> _CosTable[256];
00165         <font class="comment">// a table for fast sinus lookup</font>
00166         <font class="keyword">static</font> <font class="keywordtype">float</font> _SinTable[256];
00167         <font class="keyword">static</font> <font class="keywordtype">float</font> _PerlinNoiseTab[1024];
00168         <font class="comment">// used by perlin noise to compute each octave          </font>
00169         <font class="keyword">static</font> <font class="keywordtype">float</font> getInterpolatedNoise(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;pos);
00170         <font class="comment">// get non interpolated noise </font>
00171         <font class="keyword">static</font> <font class="keywordtype">float</font> getPerlinNoise(uint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>);
00172 };
00173 
00175 <font class="comment">// inline implementation //</font>
00177 <font class="comment"></font>
<a name="l00178"></a><a class="code" href="structNL3D_1_1CPSUtil.html#d6">00178</a> <font class="keyword">inline</font> <font class="keywordtype">void</font> CPSUtil::addRadiusToAABBox(<a class="code" href="classNLMISC_1_1CAABBox.html">NLMISC::CAABBox</a> &amp;box, <font class="keywordtype">float</font> radius)
00179 {
00180         box.<a class="code" href="classNLMISC_1_1CAABBox.html#z263_1">setHalfSize</a>(box.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_5">getHalfSize</a>() + <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(radius, radius, radius) );
00181 }
00182 
00183 
00184 <font class="comment">// get non interpolated noise </font>
<a name="l00185"></a><a class="code" href="structNL3D_1_1CPSUtil.html#f6">00185</a> <font class="keyword">inline</font> <font class="keywordtype">float</font> CPSUtil::getPerlinNoise(uint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>)
00186 {
00187         <font class="keywordflow">return</font> <a class="code" href="structNL3D_1_1CPSUtil.html#r4">_PerlinNoiseTab</a>[(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> ^ <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> ^ <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>) &amp; 1023];
00188 }
00189 
00190 
<a name="l00191"></a><a class="code" href="structNL3D_1_1CPSUtil.html#f5">00191</a> <font class="keyword">inline</font> <font class="keywordtype">float</font> CPSUtil::getInterpolatedNoise(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;pos)
00192 {
00193         uint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> = (uint) pos.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>
00194                 , <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> = (uint) pos.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>
00195                 , <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> = (uint) pos.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>;
00196 
00197         <font class="comment">// we want to avoid costly ctor call there...</font>
00198         <font class="keywordtype">float</font> fx = pos.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> - <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>
00199                   , fy = pos.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> - <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>
00200                   , fz = pos.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> - <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>;
00201 
00202         <font class="comment">// we use the following topology to get the value :</font>
00203         <font class="comment">//</font>
00204         <font class="comment">//</font>
00205         <font class="comment">//  z</font>
00206         <font class="comment">//  | 7-----6</font>
00207         <font class="comment">//   /     /</font>
00208         <font class="comment">//  4-----5 |</font>
00209         <font class="comment">//  |     | |</font>
00210         <font class="comment">//  |  3  | |2</font>
00211         <font class="comment">//  |     | /</font>
00212         <font class="comment">//  0_____1/__x</font>
00213 
00214         
00215         <font class="keyword">const</font> <font class="keywordtype">float</font> v0 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>)
00216                  ,v1 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>)
00217                  ,v2 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>)
00218                  ,v3 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a>)
00219                  ,v4 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> + 1)
00220                  ,v5 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> + 1)
00221                  ,v6 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> + 1)
00222                  ,v7 = <a class="code" href="structNL3D_1_1CPSUtil.html#f6">getPerlinNoise</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> + 1);
00223 
00224         
00225         <font class="keyword">const</font> <font class="keywordtype">float</font> h1  = fx * v1 + (1.f - fx) * v0
00226                                 ,h2 = fx * v3 + (1.f - fx) * v2 
00227                                 ,h3  = fx * v5 + (1.f - fx) * v4
00228                                 ,h4 = fx * v7 + (1.f - fx )* v6; 
00229 
00230     <font class="keyword">const</font> <font class="keywordtype">float</font> c1  = fy * h2 + (1.f - fy) * h1
00231                        ,c2  = fy * h4 + (1.f - fy) * h3;
00232 
00233         <font class="keywordflow">return</font> fz * c2 + (1.f - fz) * c1;
00234 }
00235 
00236 
<a name="l00237"></a><a class="code" href="structNL3D_1_1CPSUtil.html#d14">00237</a> <font class="keyword">inline</font> <font class="keywordtype">float</font> CPSUtil::buildPerlinNoise(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;pos, uint numOctaves)
00238 {
00239         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="structNL3D_1_1CPSUtil.html#r1">_PerlinNoiseTableInitialized</a>);
00240 
00241         <font class="keywordtype">float</font> result = 0;
00242         <font class="keywordtype">float</font> fact = .5f;
00243         <font class="keywordtype">float</font> scale = 1.f;
00244 
00245         <font class="keywordflow">for</font> (uint k = 0; k &lt; numOctaves; k++)
00246         {
00247                 result += fact * <a class="code" href="structNL3D_1_1CPSUtil.html#f5">getInterpolatedNoise</a>(scale * pos);
00248                 fact *= .5f;
00249                 scale *= 1.2537f;
00250         }       
00251         <font class="keywordflow">return</font> result;
00252 }
00253 
00254 
00255 
00256 
00257 
00258 
00259 } <font class="comment">// NL3D</font>
00260 
00261 
00262 <font class="preprocessor">#endif // NL_PS_UTIL_H</font>
00263 <font class="preprocessor"></font>
00264 <font class="comment">/* End of ps_util.h */</font>
</pre></div>

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