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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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