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<hr><h1>animation_optimizer.cpp</h1><a href="animation__optimizer_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2000-2002 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="std3d_8h.html">std3d.h</a>"</font>
00027 
00028 <font class="preprocessor">#include "<a class="code" href="animation__optimizer_8h.html">3d/animation_optimizer.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="mem__stream_8h.html">nel/misc/mem_stream.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="vectord_8h.html">nel/misc/vectord.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="track_8h.html">3d/track.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="track__keyframer_8h.html">3d/track_keyframer.h</a>"</font>
00033 <font class="preprocessor">#include "<a class="code" href="animation_8h.html">3d/animation.h</a>"</font>
00034 <font class="preprocessor">#include "<a class="code" href="track__sampled__quat_8h.html">3d/track_sampled_quat.h</a>"</font>
00035 <font class="preprocessor">#include "<a class="code" href="track__sampled__vector_8h.html">3d/track_sampled_vector.h</a>"</font>
00036 
00037 
00038 <font class="keyword">using</font>   <font class="keyword">namespace </font>NLMISC;
00039 <font class="keyword">using</font>   <font class="keyword">namespace </font>std;
00040 
00041 
00042 <font class="keyword">namespace </font>NL3D 
00043 {
00044 
00045 
00046 <font class="comment">// ***************************************************************************</font>
<a name="l00047"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a0">00047</a> CAnimationOptimizer::CAnimationOptimizer()
00048 {
00049         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o0">_SampleFrameRate</a>= 30;
00050         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o1">_QuaternionThresholdLowPrec</a>= 1.0 - 0.0001;
00051         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o2">_QuaternionThresholdHighPrec</a>= 1.0 - 0.000001;
00052         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o4">_VectorThresholdLowPrec</a>= 0.001;
00053         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o5">_VectorThresholdHighPrec</a>= 0.0001;
00054 }
00055 
00056 
00057 <font class="comment">// ***************************************************************************</font>
<a name="l00058"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a1">00058</a> <font class="keywordtype">void</font>            CAnimationOptimizer::setQuaternionThreshold(<font class="keywordtype">double</font> lowPrecThre, <font class="keywordtype">double</font> highPrecThre)
00059 {
00060         <a class="code" href="debug_8h.html#a6">nlassert</a>(lowPrecThre&gt;=0);
00061         <a class="code" href="debug_8h.html#a6">nlassert</a>(highPrecThre&gt;=0);
00062         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o1">_QuaternionThresholdLowPrec</a>= 1.0 - lowPrecThre;
00063         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o2">_QuaternionThresholdHighPrec</a>= 1.0 - highPrecThre;
00064 }
00065 
00066 
00067 <font class="comment">// ***************************************************************************</font>
<a name="l00068"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a2">00068</a> <font class="keywordtype">void</font>            CAnimationOptimizer::setVectorThreshold(<font class="keywordtype">double</font> lowPrecThre, <font class="keywordtype">double</font> highPrecThre)
00069 {
00070         <a class="code" href="debug_8h.html#a6">nlassert</a>(lowPrecThre&gt;=0);
00071         <a class="code" href="debug_8h.html#a6">nlassert</a>(highPrecThre&gt;=0);
00072         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o4">_VectorThresholdLowPrec</a>= lowPrecThre;
00073         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o5">_VectorThresholdHighPrec</a>= highPrecThre;
00074 }
00075 
00076 
00077 <font class="comment">// ***************************************************************************</font>
<a name="l00078"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a5">00078</a> <font class="keywordtype">void</font>            CAnimationOptimizer::setSampleFrameRate(<font class="keywordtype">float</font> frameRate)
00079 {
00080         <a class="code" href="debug_8h.html#a6">nlassert</a>(frameRate&gt;0);
00081         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o0">_SampleFrameRate</a>= frameRate;
00082 }
00083 
00084 
00085 <font class="comment">// ***************************************************************************</font>
<a name="l00086"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a6">00086</a> <font class="keywordtype">void</font>            CAnimationOptimizer::optimize(<font class="keyword">const</font> CAnimation &amp;animIn, CAnimation &amp;animOut)
00087 {
00088         <font class="comment">// reset animOut</font>
00089         <a class="code" href="namespaceNLMISC.html#a222">contReset</a>(animOut);
00090 
00091         <font class="comment">// Parse all tracks of the animation.</font>
00092         set&lt;string&gt;             setString;
00093         animIn.getTrackNames (setString);
00094         set&lt;string&gt;::iterator   it;
00095 
00096         <font class="keywordflow">for</font>(it=setString.begin();it!=setString.end();it++)
00097         {
00098                 <font class="keyword">const</font> string    &amp;trackName= *it;
00099                 uint    trackId= animIn.getIdTrackByName(trackName);
00100                 <a class="code" href="debug_8h.html#a6">nlassert</a>(trackId!=CAnimation::NotFound);
00101                 <font class="keyword">const</font> ITrack    *track= animIn.getTrack(trackId);
00102 
00103                 <font class="comment">// If the track is optimisable.</font>
00104                 ITrack  *newTrack;
00105                 <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c1">isTrackOptimisable</a>(track))
00106                 {
00107                         <font class="comment">// choose the threshold according to precision wanted</font>
00108                         <font class="keywordflow">if</font>( <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c3">isLowPrecisionTrack</a>(trackName) )
00109                         {
00110                                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o3">_QuaternionThreshold</a>= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o1">_QuaternionThresholdLowPrec</a>;
00111                                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o6">_VectorThreshold</a>= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o4">_VectorThresholdLowPrec</a>;
00112                         }
00113                         <font class="keywordflow">else</font>
00114                         {
00115                                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o3">_QuaternionThreshold</a>= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o2">_QuaternionThresholdHighPrec</a>;
00116                                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o6">_VectorThreshold</a>= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o5">_VectorThresholdHighPrec</a>;
00117                         }
00118 
00119                         <font class="comment">// optimize it.</font>
00120                         newTrack= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c2">optimizeTrack</a>(track);
00121                 }
00122                 <font class="keywordflow">else</font>
00123                 {
00124                         <font class="comment">// just clone it.</font>
00125                         newTrack= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c0">cloneTrack</a>(track);
00126                 }
00127 
00128                 <font class="comment">// Add it to the animation</font>
00129                 animOut.addTrack(trackName, newTrack);
00130         }
00131 
00132         <font class="comment">// Set min animation length</font>
00133         animOut.setMinEndTime (animIn.getEndTime ());
00134         <a class="code" href="debug_8h.html#a6">nlassert</a> (animOut.getEndTime() == animIn.getEndTime());
00135 }
00136 
00137 <font class="comment">// ***************************************************************************</font>
<a name="l00138"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c0">00138</a> ITrack          *CAnimationOptimizer::cloneTrack(<font class="keyword">const</font> ITrack   *trackIn)
00139 {
00140         CMemStream      memStream;
00141 
00142         <font class="comment">// write to the stream.</font>
00143         ITrack  *trackInSerial= const_cast&lt;ITrack*&gt;(trackIn);
00144         memStream.serialPolyPtr(trackInSerial);
00145 
00146         <font class="comment">// read from the stream.</font>
00147         memStream.invert();
00148         ITrack  *ret= NULL;
00149         memStream.serialPolyPtr(ret);
00150 
00151         <font class="keywordflow">return</font> ret;
00152 }
00153 
00154 
00155 <font class="comment">// ***************************************************************************</font>
<a name="l00156"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c1">00156</a> <font class="keywordtype">bool</font>            CAnimationOptimizer::isTrackOptimisable(<font class="keyword">const</font> ITrack    *trackIn)
00157 {
00158         <a class="code" href="debug_8h.html#a6">nlassert</a>(trackIn);
00159 
00160         <font class="comment">// If the track is a Linear, Bezier or a TCB track, suppose we can optimize it. Constant may not be interressant....</font>
00161         <font class="keywordflow">if</font>(     dynamic_cast&lt;const CTrackKeyFramerTCBQuat*&gt;(trackIn) || 
00162                 dynamic_cast&lt;const CTrackKeyFramerBezierQuat*&gt;(trackIn) ||
00163                 dynamic_cast&lt;const CTrackKeyFramerLinearQuat*&gt;(trackIn) )
00164                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00165 
00166         <font class="comment">// If the track is a Linear, Bezier or a TCB track, suppose we can optimize it. Constant may not be interressant....</font>
00167         <font class="keywordflow">if</font>(     dynamic_cast&lt;const CTrackKeyFramerTCBVector*&gt;(trackIn) || 
00168                 dynamic_cast&lt;const CTrackKeyFramerBezierVector*&gt;(trackIn) ||
00169                 dynamic_cast&lt;const CTrackKeyFramerLinearVector*&gt;(trackIn) )
00170                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00171 
00172         <font class="keywordflow">return</font> <font class="keyword">false</font>;
00173 }
00174 
00175 
00176 <font class="comment">// ***************************************************************************</font>
<a name="l00177"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c2">00177</a> ITrack          *CAnimationOptimizer::optimizeTrack(<font class="keyword">const</font> ITrack        *trackIn)
00178 {
00179         <font class="comment">// Get track param.</font>
00180         <font class="keywordtype">float</font> beginTime= trackIn-&gt;getBeginTime();
00181         <font class="keywordtype">float</font> endTime= trackIn-&gt;getEndTime();
00182         <a class="code" href="debug_8h.html#a6">nlassert</a>(endTime&gt;=beginTime);
00183 
00184         <font class="comment">// Get num Sample </font>
00185         uint    numSamples= (uint)ceil( (endTime-beginTime)*<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o0">_SampleFrameRate</a>);
00186         numSamples= max(1U, numSamples);
00187         <a class="code" href="debug_8h.html#a6">nlassert</a>(numSamples&lt;65535);
00188 
00189 
00190         <font class="comment">// Optimize Quaternion track??</font>
00191         <font class="comment">//================</font>
00192         <font class="keywordflow">if</font>( dynamic_cast&lt;const CAnimatedValueQuat *&gt;(&amp;trackIn-&gt;getValue()) )
00193         {
00194                 <font class="comment">// sample the animation. Store result in _TimeList/_QuatKeyList</font>
00195                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_0">sampleQuatTrack</a>(trackIn, beginTime, endTime, numSamples);
00196 
00197                 <font class="comment">// check if the sampled track can be reduced to a TrackDefaultQuat. Test _QuatKeyList.</font>
00198                 <font class="keywordflow">if</font>( <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_1">testConstantQuatTrack</a>() )
00199                 {
00200                         <font class="comment">// create a default Track Quat.</font>
00201                         CTrackDefaultQuat       *trackDefault= <font class="keyword">new</font> CTrackDefaultQuat;
00202                         <font class="comment">// setup the uniform value.</font>
00203                         trackDefault-&gt;setValue(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[0]);
00204 
00205                         <font class="comment">// return the result.</font>
00206                         <font class="keywordflow">return</font> trackDefault;
00207                 }
00208                 <font class="comment">// else optimize the sampled animation, and build.</font>
00209                 <font class="keywordflow">else</font>
00210                 {
00211                         <font class="comment">// optimize.</font>
00212                         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_2">optimizeQuatTrack</a>();
00213 
00214                         <font class="comment">// Create a sampled quaternion track</font>
00215                         CTrackSampledQuat       *trackSQ= <font class="keyword">new</font> CTrackSampledQuat;
00216 
00217                         <font class="comment">// Copy loop from track.</font>
00218                         trackSQ-&gt;setLoopMode(trackIn-&gt;getLoopMode());
00219 
00220                         <font class="comment">// Build it.</font>
00221                         trackSQ-&gt;build(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>, <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>, beginTime, endTime);
00222 
00223                         <font class="comment">// return result.</font>
00224                         <font class="keywordflow">return</font> trackSQ;
00225                 }
00226         }
00227         <font class="comment">// Optimize Position track??</font>
00228         <font class="comment">//================</font>
00229         <font class="keywordflow">else</font> <font class="keywordflow">if</font>( dynamic_cast&lt;const CAnimatedValueVector *&gt;(&amp;trackIn-&gt;getValue()) )
00230         {
00231                 <font class="comment">// sample the animation. Store result in _TimeList/_VectorKeyList</font>
00232                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_0">sampleVectorTrack</a>(trackIn, beginTime, endTime, numSamples);
00233 
00234                 <font class="comment">// check if the sampled track can be reduced to a TrackDefaultVector. Test _VectorKeyList.</font>
00235                 <font class="keywordflow">if</font>( <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_1">testConstantVectorTrack</a>() )
00236                 {
00237                         <font class="comment">// create a default Track Vector.</font>
00238                         CTrackDefaultVector     *trackDefault= <font class="keyword">new</font> CTrackDefaultVector;
00239                         <font class="comment">// setup the uniform value.</font>
00240                         trackDefault-&gt;setValue(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[0]);
00241 
00242                         <font class="comment">// return the result.</font>
00243                         <font class="keywordflow">return</font> trackDefault;
00244                 }
00245                 <font class="comment">// else optimize the sampled animation, and build.</font>
00246                 <font class="keywordflow">else</font>
00247                 {
00248                         <font class="comment">// optimize.</font>
00249                         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_2">optimizeVectorTrack</a>();
00250 
00251                         <font class="comment">// Create a sampled Vector track</font>
00252                         CTrackSampledVector     *trackSV= <font class="keyword">new</font> CTrackSampledVector;
00253 
00254                         <font class="comment">// Copy loop from track.</font>
00255                         trackSV-&gt;setLoopMode(trackIn-&gt;getLoopMode());
00256 
00257                         <font class="comment">// Build it.</font>
00258                         trackSV-&gt;build(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>, <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>, beginTime, endTime);
00259 
00260                         <font class="comment">// return result.</font>
00261                         <font class="keywordflow">return</font> trackSV;
00262                 }
00263         }
00264         <font class="keywordflow">else</font>
00265         {
00266                 <font class="comment">// Must be a quaternion track or vector track for now.</font>
00267                 <a class="code" href="debug_8h.html#a12">nlstop</a>;
00268                 <font class="comment">// Avoid warning.</font>
00269                 <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c0">cloneTrack</a>(trackIn);
00270         }
00271 }
00272 
00273 
00274 <font class="comment">// ***************************************************************************</font>
00275 <font class="comment">// ***************************************************************************</font>
00276 <font class="comment">// Quaternion optimisation</font>
00277 <font class="comment">// ***************************************************************************</font>
00278 <font class="comment">// ***************************************************************************</font>
00279 
00280 
00281 <font class="comment">// ***************************************************************************</font>
<a name="l00282"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_0">00282</a> <font class="keywordtype">void</font>            CAnimationOptimizer::sampleQuatTrack(<font class="keyword">const</font> ITrack *trackIn, <font class="keywordtype">float</font> beginTime, <font class="keywordtype">float</font> endTime, uint numSamples)
00283 {
00284         <font class="comment">// resize tmp samples</font>
00285         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>.resize(numSamples);
00286         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>.resize(numSamples);
00287 
00288         <font class="comment">// Sample the animation.</font>
00289         <font class="keywordtype">float</font>   <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= beginTime;
00290         <font class="keywordtype">float</font>   dt= 0;
00291         <font class="keywordflow">if</font>(numSamples&gt;1)
00292                 dt= (endTime-beginTime)/(numSamples-1);
00293         <font class="keywordflow">for</font>(uint i=0;i&lt;numSamples; i++, <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>+=dt)
00294         {
00295                 CQuat   quat;
00296 
00297                 <font class="comment">// make exact endTime match (avoid precision problem)</font>
00298                 <font class="keywordflow">if</font>(i==numSamples-1)
00299                         <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= endTime;
00300 
00301                 <font class="comment">// evaluate the track</font>
00302                 const_cast&lt;ITrack*&gt;(trackIn)-&gt;interpolate(<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>, quat);
00303 
00304                 <font class="comment">// normalize this quaternion</font>
00305                 quat.normalize();
00306 
00307                 <font class="comment">// force on same hemisphere according to precedent frame.</font>
00308                 <font class="keywordflow">if</font>(i&gt;0)
00309                 {
00310                         quat.makeClosest(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i-1]);
00311                 }
00312 
00313                 <font class="comment">// store time and key.</font>
00314                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i]= i;
00315                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i]= quat;
00316         }
00317 
00318 }
00319 
00320 <font class="comment">// ***************************************************************************</font>
<a name="l00321"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_1">00321</a> <font class="keywordtype">bool</font>            CAnimationOptimizer::testConstantQuatTrack()
00322 {
00323         uint    numSamples= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>.size();
00324         <a class="code" href="debug_8h.html#a6">nlassert</a>(numSamples&gt;0);
00325 
00326         <font class="comment">// Get the first sample as the reference quaternion, and test others from this one.</font>
00327         CQuat   quatRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[0];
00328         <font class="keywordflow">for</font>(uint i=0;i&lt;numSamples;i++)
00329         {
00330                 <font class="comment">// All values must be nearly equal to the reference quaternion.</font>
00331                 <font class="keywordflow">if</font>(!<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_3">nearlySameQuaternion</a>(quatRef, <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i]))
00332                         <font class="keywordflow">return</font> <font class="keyword">false</font>;
00333         }
00334 
00335         <font class="comment">// ok.</font>
00336         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00337 }
00338 
00339 
00340 <font class="comment">// ***************************************************************************</font>
<a name="l00341"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_2">00341</a> <font class="keywordtype">void</font>            CAnimationOptimizer::optimizeQuatTrack()
00342 {
00343         uint    numSamples= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>.size();
00344         <a class="code" href="debug_8h.html#a6">nlassert</a>(numSamples&gt;0);
00345 
00346         <font class="comment">// &lt;=2 key? =&gt; no opt possible..</font>
00347         <font class="keywordflow">if</font>(numSamples&lt;=2)
00348                 <font class="keywordflow">return</font>;
00349 
00350         <font class="comment">// prepare dest opt</font>
00351         std::vector&lt;uint16&gt;             optTimeList;
00352         std::vector&lt;CQuat&gt;              optKeyList;
00353         optTimeList.reserve(numSamples);
00354         optKeyList.reserve(numSamples);
00355 
00356         <font class="comment">// Add the first key.</font>
00357         optTimeList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[0]);
00358         optKeyList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[0]);
00359         <font class="keywordtype">double</font>  timeRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[0];
00360         CQuatD  quatRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[0];
00361 
00362         <font class="comment">// For all keys, but the first and the last, test if can remove them.</font>
00363         <font class="keywordflow">for</font>(uint i=1; i&lt;numSamples-1; i++)
00364         {
00365                 CQuatD  quatCur= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i];
00366                 CQuatD  quatNext= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i+1];
00367                 <font class="keywordtype">double</font>  timeCur= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i];
00368                 <font class="keywordtype">double</font>  timeNext= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i+1];
00369 
00370                 <font class="comment">// must add the key?</font>
00371                 <font class="keywordtype">bool</font>    mustAdd= <font class="keyword">false</font>;
00372 
00373                 <font class="comment">// If the Delta time are too big, abort (CTrackSampledQuat limitation)</font>
00374                 <font class="keywordflow">if</font>(timeNext-timeRef&gt;255)
00375                 {
00376                         mustAdd= <font class="keyword">true</font>;
00377                 }
00378                 <font class="comment">// If the next quaternion or the current quaternion are not on same hemisphere than ref, abort.</font>
00379                 <font class="keywordflow">else</font> <font class="keywordflow">if</font>( CQuatD::dotProduct(quatCur, quatRef)&lt;0 || CQuatD::dotProduct(quatNext, quatRef)&lt;0 )
00380                 {
00381                         mustAdd= <font class="keyword">true</font>;
00382                 }
00383                 <font class="comment">// else, test interpolation</font>
00384                 <font class="keywordflow">else</font>
00385                 {
00386                         <font class="comment">// If the 3 quats are nearly equals, it is ok (avoid interpolation)</font>
00387                         <font class="keywordflow">if</font>( <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_3">nearlySameQuaternion</a>(quatRef, quatCur) &amp;&amp; <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_3">nearlySameQuaternion</a>(quatRef, quatNext) )
00388                                 mustAdd= <font class="keyword">false</font>;
00389                         <font class="keywordflow">else</font>
00390                         {
00391                                 <font class="comment">// interpolate.</font>
00392                                 CQuatD  quatInterpolated;
00393                                 <font class="keywordtype">double</font>  <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= (timeCur-timeRef)/(timeNext/timeRef);
00394                                 quatInterpolated= CQuatD::slerp(quatRef, quatNext, (<font class="keywordtype">float</font>)<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>);
00395 
00396                                 <font class="comment">// test if cur and interpolate are equal.</font>
00397                                 <font class="keywordflow">if</font>( !<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_3">nearlySameQuaternion</a>(quatCur, quatInterpolated) )
00398                                         mustAdd= <font class="keyword">true</font>;
00399                         }
00400                 }
00401 
00402                 <font class="comment">// If must add the key to the optimized track.</font>
00403                 <font class="keywordflow">if</font>(mustAdd)
00404                 {
00405                         optTimeList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i]);
00406                         optKeyList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i]);
00407                         timeRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i];
00408                         quatRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[i];
00409                 }
00410         }
00411 
00412         <font class="comment">// Add the last key.</font>
00413         optTimeList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[numSamples-1]);
00414         optKeyList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>[numSamples-1]);
00415 
00416         <font class="comment">// copy the optimized track to the main one.</font>
00417         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>= optTimeList;
00418         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o9">_QuatKeyList</a>= optKeyList;
00419 }
00420 
00421 
00422 <font class="comment">// ***************************************************************************</font>
<a name="l00423"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z379_3">00423</a> <font class="keywordtype">bool</font>            CAnimationOptimizer::nearlySameQuaternion(<font class="keyword">const</font> CQuatD &amp;quat0, <font class="keyword">const</font> CQuatD &amp;quat1)
00424 {
00425         <font class="comment">// true if exactly same, or exactly inverse</font>
00426         <font class="keywordflow">if</font>(quat0==quat1 || quat0==-quat1)
00427                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00428 
00429         <font class="comment">// Else compute the rotation to go from qRef to q. Use double for better presion.</font>
00430         CQuatD  quatDif;
00431         quatDif= quat1 * quat0.conjugate();
00432         <font class="comment">// inverse the quaternion if necessary. ie make closest to the identity quaternion.</font>
00433         <font class="keywordflow">if</font>(quatDif.w&lt;0)
00434                 quatDif= -quatDif;
00435 
00436         <font class="comment">// compare "angle threshold"</font>
00437         <font class="keywordflow">return</font> (quatDif.w &gt;= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o3">_QuaternionThreshold</a>);
00438 }
00439 
00440 
00441 <font class="comment">// ***************************************************************************</font>
00442 <font class="comment">// ***************************************************************************</font>
00443 <font class="comment">// Vector optimisation</font>
00444 <font class="comment">// ***************************************************************************</font>
00445 <font class="comment">// ***************************************************************************</font>
00446 
00447 
00448 <font class="comment">// ***************************************************************************</font>
<a name="l00449"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_0">00449</a> <font class="keywordtype">void</font>            CAnimationOptimizer::sampleVectorTrack(<font class="keyword">const</font> ITrack *trackIn, <font class="keywordtype">float</font> beginTime, <font class="keywordtype">float</font> endTime, uint numSamples)
00450 {
00451         <font class="comment">// resize tmp samples</font>
00452         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>.resize(numSamples);
00453         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>.resize(numSamples);
00454 
00455         <font class="comment">// Sample the animation.</font>
00456         <font class="keywordtype">float</font>   <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= beginTime;
00457         <font class="keywordtype">float</font>   dt= 0;
00458         <font class="keywordflow">if</font>(numSamples&gt;1)
00459                 dt= (endTime-beginTime)/(numSamples-1);
00460         <font class="keywordflow">for</font>(uint i=0;i&lt;numSamples; i++, <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>+=dt)
00461         {
00462                 CVector vector;
00463 
00464                 <font class="comment">// make exact endTime match (avoid precision problem)</font>
00465                 <font class="keywordflow">if</font>(i==numSamples-1)
00466                         <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= endTime;
00467 
00468                 <font class="comment">// evaluate the track</font>
00469                 const_cast&lt;ITrack*&gt;(trackIn)-&gt;interpolate(<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>, vector);
00470 
00471                 <font class="comment">// store time and key.</font>
00472                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i]= i;
00473                 <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[i]= vector;
00474         }
00475 
00476 }
00477 
00478 <font class="comment">// ***************************************************************************</font>
<a name="l00479"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_1">00479</a> <font class="keywordtype">bool</font>            CAnimationOptimizer::testConstantVectorTrack()
00480 {
00481         uint    numSamples= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>.size();
00482         <a class="code" href="debug_8h.html#a6">nlassert</a>(numSamples&gt;0);
00483 
00484         <font class="comment">// Get the first sample as the reference Vectorer, and test others from this one.</font>
00485         CVector vectorRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[0];
00486         <font class="keywordflow">for</font>(uint i=0;i&lt;numSamples;i++)
00487         {
00488                 <font class="comment">// All values must be nearly equal to the reference vector.</font>
00489                 <font class="keywordflow">if</font>(!<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_3">nearlySameVector</a>(vectorRef, <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[i]))
00490                         <font class="keywordflow">return</font> <font class="keyword">false</font>;
00491         }
00492 
00493         <font class="comment">// ok.</font>
00494         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00495 }
00496 
00497 
00498 <font class="comment">// ***************************************************************************</font>
<a name="l00499"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_2">00499</a> <font class="keywordtype">void</font>            CAnimationOptimizer::optimizeVectorTrack()
00500 {
00501         uint    numSamples= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>.size();
00502         <a class="code" href="debug_8h.html#a6">nlassert</a>(numSamples&gt;0);
00503 
00504         <font class="comment">// &lt;=2 key? =&gt; no opt possible..</font>
00505         <font class="keywordflow">if</font>(numSamples&lt;=2)
00506                 <font class="keywordflow">return</font>;
00507 
00508         <font class="comment">// prepare dest opt</font>
00509         std::vector&lt;uint16&gt;             optTimeList;
00510         std::vector&lt;CVector&gt;    optKeyList;
00511         optTimeList.reserve(numSamples);
00512         optKeyList.reserve(numSamples);
00513 
00514         <font class="comment">// Add the first key.</font>
00515         optTimeList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[0]);
00516         optKeyList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[0]);
00517         <font class="keywordtype">double</font>          timeRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[0];
00518         CVectorD        vectorRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[0];
00519 
00520         <font class="comment">// For all keys, but the first and the last, test if can remove them.</font>
00521         <font class="keywordflow">for</font>(uint i=1; i&lt;numSamples-1; i++)
00522         {
00523                 CVectorD        vectorCur= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[i];
00524                 CVectorD        vectorNext= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[i+1];
00525                 <font class="keywordtype">double</font>  timeCur= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i];
00526                 <font class="keywordtype">double</font>  timeNext= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i+1];
00527 
00528                 <font class="comment">// must add the key?</font>
00529                 <font class="keywordtype">bool</font>    mustAdd= <font class="keyword">false</font>;
00530 
00531                 <font class="comment">// If the Delta time are too big, abort (CTrackSampledVector limitation)</font>
00532                 <font class="keywordflow">if</font>(timeNext-timeRef&gt;255)
00533                 {
00534                         mustAdd= <font class="keyword">true</font>;
00535                 }
00536                 <font class="comment">// else, test interpolation</font>
00537                 <font class="keywordflow">else</font>
00538                 {
00539                         <font class="comment">// If the 3 Vectors are nearly equals, it is ok (avoid interpolation)</font>
00540                         <font class="keywordflow">if</font>( <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_3">nearlySameVector</a>(vectorRef, vectorCur) &amp;&amp; <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_3">nearlySameVector</a>(vectorRef, vectorNext) )
00541                                 mustAdd= <font class="keyword">false</font>;
00542                         <font class="keywordflow">else</font>
00543                         {
00544                                 <font class="comment">// interpolate.</font>
00545                                 CVectorD        vectorInterpolated;
00546                                 <font class="keywordtype">double</font>  <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= (timeCur-timeRef)/(timeNext/timeRef);
00547                                 vectorInterpolated= vectorRef*(1-<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>) + vectorNext*<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>;
00548 
00549                                 <font class="comment">// test if cur and interpolate are equal.</font>
00550                                 <font class="keywordflow">if</font>( !<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_3">nearlySameVector</a>(vectorCur, vectorInterpolated) )
00551                                         mustAdd= <font class="keyword">true</font>;
00552                         }
00553                 }
00554 
00555                 <font class="comment">// If must add the key to the optimized track.</font>
00556                 <font class="keywordflow">if</font>(mustAdd)
00557                 {
00558                         optTimeList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i]);
00559                         optKeyList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[i]);
00560                         timeRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[i];
00561                         vectorRef= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[i];
00562                 }
00563         }
00564 
00565         <font class="comment">// Add the last key.</font>
00566         optTimeList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>[numSamples-1]);
00567         optKeyList.push_back(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>[numSamples-1]);
00568 
00569         <font class="comment">// copy the optimized track to the main one.</font>
00570         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o8">_TimeList</a>= optTimeList;
00571         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o10">_VectorKeyList</a>= optKeyList;
00572 }
00573 
00574 
00575 <font class="comment">// ***************************************************************************</font>
<a name="l00576"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#z380_3">00576</a> <font class="keywordtype">bool</font>            CAnimationOptimizer::nearlySameVector(<font class="keyword">const</font> CVectorD &amp;v0, <font class="keyword">const</font> CVectorD &amp;v1)
00577 {
00578         <font class="comment">// true if exactly same</font>
00579         <font class="keywordflow">if</font>(v0==v1)
00580                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00581 
00582         <font class="comment">// Else compute the dif, use double for better precision</font>
00583         CVectorD        vDif;
00584         vDif= v1-v0;
00585 
00586         <font class="comment">// compare norm</font>
00587         <font class="keywordflow">return</font> (vDif.norm() &lt;= <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o6">_VectorThreshold</a>);
00588 }
00589 
00590 
00591 <font class="comment">// ***************************************************************************</font>
00592 <font class="comment">// ***************************************************************************</font>
00593 <font class="comment">// LowPrecisionTrack</font>
00594 <font class="comment">// ***************************************************************************</font>
00595 <font class="comment">// ***************************************************************************</font>
00596 
00597 
00598 <font class="comment">// ***************************************************************************</font>
<a name="l00599"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a3">00599</a> <font class="keywordtype">void</font>            CAnimationOptimizer::addLowPrecisionTrack(<font class="keyword">const</font> std::string &amp;name)
00600 {
00601         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o7">_LowPrecTrackKeyName</a>.push_back(name);
00602 }
00603 
00604 <font class="comment">// ***************************************************************************</font>
<a name="l00605"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#a4">00605</a> <font class="keywordtype">void</font>            CAnimationOptimizer::clearLowPrecisionTracks()
00606 {
00607         <a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o7">_LowPrecTrackKeyName</a>.clear();
00608 }
00609 
00610 <font class="comment">// ***************************************************************************</font>
<a name="l00611"></a><a class="code" href="classNL3D_1_1CAnimationOptimizer.html#c3">00611</a> <font class="keywordtype">bool</font>            CAnimationOptimizer::isLowPrecisionTrack(<font class="keyword">const</font> std::string &amp;trackName)
00612 {
00613         <font class="keywordflow">for</font>(uint i=0; i&lt;<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o7">_LowPrecTrackKeyName</a>.size(); i++)
00614         {
00615                 <font class="comment">// if find a substr of the key, it is a low prec track</font>
00616                 <font class="keywordflow">if</font>( trackName.find(<a class="code" href="classNL3D_1_1CAnimationOptimizer.html#o7">_LowPrecTrackKeyName</a>[i]) != string::npos )
00617                         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00618         }
00619 
00620         <font class="comment">// no key found</font>
00621         <font class="keywordflow">return</font> <font class="keyword">false</font>;
00622 }
00623 
00624 
00625 } <font class="comment">// NL3D</font>
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