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<hr><h1>load_balancing_trav.cpp</h1><a href="load__balancing__trav_8cpp.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">#include "<a class="code" href="std3d_8h.html">std3d.h</a>"</font>
00027
00028 <font class="preprocessor">#include "<a class="code" href="load__balancing__trav_8h.html">3d/load_balancing_trav.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="hrc__trav_8h.html">3d/hrc_trav.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="clip__trav_8h.html">3d/clip_trav.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="common_8h.html">nel/misc/common.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="hierarchical__timer_8h.html">nel/misc/hierarchical_timer.h</a>"</font>
00033
00034
00035 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00036 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00037
00038
00039 <font class="comment">// ***************************************************************************</font>
<a name="l00040"></a><a class="code" href="load__balancing__trav_8cpp.html#a0">00040</a> <font class="preprocessor">#define NL3D_DEFAULT_LOADBALANCING_VALUE_SMOOTHER 50</font>
<a name="l00041"></a><a class="code" href="load__balancing__trav_8cpp.html#a1">00041</a> <font class="preprocessor"></font><font class="preprocessor">#define NL3D_LOADBALANCING_SMOOTHER_MAX_RATIO 1.1f</font>
00042 <font class="preprocessor"></font>
00043 <font class="keyword">namespace </font>NL3D
00044 {
00045
00046 <font class="comment">// ***************************************************************************</font>
00047 <font class="comment">// ***************************************************************************</font>
00048 <font class="comment">// ***************************************************************************</font>
00049 <font class="comment">// ***************************************************************************</font>
00050
00051
00052 <font class="comment">// ***************************************************************************</font>
<a name="l00053"></a><a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#a0">00053</a> CLoadBalancingGroup::CLoadBalancingGroup()
00054 {
00055 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o5">_PrecPolygonBalancingMode</a>= CLoadBalancingGroup::PolygonBalancingOff;
00056 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o2">_NbFaceWanted</a>= 20000;
00057 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o4">_ValueSmoother</a>.<a class="code" href="classNLMISC_1_1CValueSmoother.html#a1">init</a>(<a class="code" href="load__balancing__trav_8cpp.html#a0">NL3D_DEFAULT_LOADBALANCING_VALUE_SMOOTHER</a>);
00058 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o0">_DefaultGroup</a>= <font class="keyword">false</font>;
00059
00060 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o1">_NbFacePass0</a>= 0;
00061 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= 1;
00062 }
00063
00064
00065 <font class="comment">// ***************************************************************************</font>
<a name="l00066"></a><a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#c0">00066</a> <font class="keywordtype">void</font> CLoadBalancingGroup::computeRatioAndSmooth(TPolygonBalancingMode polMode)
00067 {
00068 <font class="comment">// If Default group, disable load balancing</font>
00069 <font class="keywordflow">if</font>(_DefaultGroup)
00070 polMode= <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#s4s0">PolygonBalancingOff</a>;
00071
00072 <font class="comment">// Compute ratio</font>
00073 <font class="keywordflow">switch</font>(polMode)
00074 {
00075 <font class="keywordflow">case</font> <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#s4s0">PolygonBalancingOff</a>:
00076 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= 1;
00077 <font class="keywordflow">break</font>;
00078 <font class="keywordflow">case</font> <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#s4s1">PolygonBalancingOn</a> :
00079 <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o1">_NbFacePass0</a>!=0)
00080 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= (float)<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o2">_NbFaceWanted</a> / <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o1">_NbFacePass0</a>;
00081 <font class="keywordflow">else</font>
00082 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= 1;
00083 <font class="keywordflow">break</font>;
00084 <font class="keywordflow">case</font> <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#s4s2">PolygonBalancingClamp</a>:
00085 <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o1">_NbFacePass0</a>!=0)
00086 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= (float)<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o2">_NbFaceWanted</a> / <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o1">_NbFacePass0</a>;
00087 <font class="keywordflow">else</font>
00088 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= 1;
00089 <a class="code" href="namespaceNLMISC.html#a215">clamp</a>(<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>, 0, 1);
00090 <font class="keywordflow">break</font>;
00091 <font class="keywordflow">default</font>: <font class="keywordflow">break</font>;
00092 };
00093
00094 <font class="comment">// smooth the value.</font>
00095 <font class="comment">// if change of PolygonBalancingMode, reset the _ValueSmoother.</font>
00096 <font class="keywordflow">if</font>(polMode!=<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o5">_PrecPolygonBalancingMode</a>)
00097 {
00098 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o4">_ValueSmoother</a>.<a class="code" href="classNLMISC_1_1CValueSmoother.html#a1">init</a>(<a class="code" href="load__balancing__trav_8cpp.html#a0">NL3D_DEFAULT_LOADBALANCING_VALUE_SMOOTHER</a>);
00099 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o5">_PrecPolygonBalancingMode</a>= polMode;
00100 }
00101 <font class="comment">// if not PolygonBalancingOff, smooth the ratio.</font>
00102 <font class="keywordflow">if</font>(polMode!=<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#s4s0">PolygonBalancingOff</a>)
00103 {
00104 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o4">_ValueSmoother</a>.<a class="code" href="classNLMISC_1_1CValueSmoother.html#a3">addValue</a>(<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>);
00105 <font class="keywordtype">float</font> fSmooth= <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o4">_ValueSmoother</a>.<a class="code" href="classNLMISC_1_1CValueSmoother.html#a4">getSmoothValue</a>();
00106
00107 <font class="comment">// If after smoothing, the number of faces is still too big, reduce smooth effect! (frustrum clip effect)</font>
00108 <font class="keywordflow">if</font>(fSmooth*<a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o1">_NbFacePass0</a> > <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o2">_NbFaceWanted</a>*<a class="code" href="load__balancing__trav_8cpp.html#a1">NL3D_LOADBALANCING_SMOOTHER_MAX_RATIO</a>)
00109 {
00110 <font class="comment">// reset the smoother</font>
00111 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o4">_ValueSmoother</a>.<a class="code" href="classNLMISC_1_1CValueSmoother.html#a2">reset</a>();
00112 <font class="comment">// reduce smooth effect</font>
00113 fSmooth= <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>*<a class="code" href="load__balancing__trav_8cpp.html#a1">NL3D_LOADBALANCING_SMOOTHER_MAX_RATIO</a>;
00114 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o4">_ValueSmoother</a>.<a class="code" href="classNLMISC_1_1CValueSmoother.html#a3">addValue</a>(fSmooth);
00115 }
00116
00117 <font class="comment">// take the smoothed value.</font>
00118 <a class="code" href="classNL3D_1_1CLoadBalancingGroup.html#o3">_FaceRatio</a>= fSmooth;
00119 }
00120
00121
00122 }
00123
00124
00125
00126 <font class="comment">// ***************************************************************************</font>
00127 <font class="comment">// ***************************************************************************</font>
00128 <font class="comment">// ***************************************************************************</font>
00129 <font class="comment">// ***************************************************************************</font>
00130
00131
00132 <font class="comment">// ***************************************************************************</font>
<a name="l00133"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z527_0">00133</a> IObs *CLoadBalancingTrav::createDefaultObs()<font class="keyword"> const</font>
00134 <font class="keyword"></font>{
00135 <font class="keywordflow">return</font> <font class="keyword">new</font> CDefaultLoadBalancingObs;
00136 }
00137
00138
00139 <font class="comment">// ***************************************************************************</font>
<a name="l00140"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#a0">00140</a> CLoadBalancingTrav::CLoadBalancingTrav()
00141 {
00142 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z528_5">PolygonBalancingMode</a>= CLoadBalancingGroup::PolygonBalancingOff;
00143
00144 <font class="comment">// Add the default group and make it default</font>
00145 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>[<font class="stringliteral">"Default"</font>].Name= <font class="stringliteral">"Default"</font>;
00146 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>[<font class="stringliteral">"Default"</font>]._DefaultGroup= <font class="keyword">true</font>;
00147
00148 <font class="comment">// set the DefaultGroup ptr.</font>
00149 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o2">_DefaultGroup</a>= &<a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>[<font class="stringliteral">"Default"</font>];
00150
00151 <font class="comment">// prepare some space</font>
00152 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o4">_VisibleList</a>.reserve(1024);
00153 }
00154
00155
00156 <font class="comment">// ***************************************************************************</font>
<a name="l00157"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#a4">00157</a> <font class="keywordtype">void</font> CLoadBalancingTrav::clearVisibleList()
00158 {
00159 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o4">_VisibleList</a>.clear();
00160 }
00161
00162 <font class="comment">// ***************************************************************************</font>
<a name="l00163"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#a5">00163</a> <font class="keywordtype">void</font> CLoadBalancingTrav::addVisibleObs(IBaseLoadBalancingObs *obs)
00164 {
00165 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o4">_VisibleList</a>.push_back(obs);
00166 }
00167
00168
00169 <font class="comment">// ***************************************************************************</font>
<a name="l00170"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z527_3">00170</a> <font class="keywordtype">void</font> CLoadBalancingTrav::traverse()
00171 {
00172 <a class="code" href="hierarchical__timer_8h.html#a4">H_AUTO</a>( NL3D_TravLoadBalancing );
00173
00174 ITravCameraScene::update();
00175
00176 <font class="comment">// Reset each group.</font>
00177 <font class="comment">//================</font>
00178 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#u1">ItGroupMap</a> it= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.begin();
00179 <font class="keywordflow">for</font>(;it!=<a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.end();it++)
00180 {
00181 <font class="comment">// reset _NbFacePass0.</font>
00182 it->second._NbFacePass0= 0;
00183 }
00184
00185
00186 <font class="comment">// Traverse the graph 2 times.</font>
00187
00188 <font class="comment">// 1st pass, count NBFaces drawed.</font>
00189 <font class="comment">//================</font>
00190 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o0">_LoadPass</a>= 0;
00191 <font class="comment">// count _NbFacePass0.</font>
00192 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#c0">traverseVisibilityList</a>();
00193
00194
00195 <font class="comment">// Reset _SumNbFacePass0</font>
00196 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o1">_SumNbFacePass0</a>= 0;
00197 <font class="comment">// For each group</font>
00198 it= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.begin();
00199 <font class="keywordflow">for</font>(;it!=<a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.end();it++)
00200 {
00201 <font class="comment">// compute ratio and smooth</font>
00202 it->second.computeRatioAndSmooth(<a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z528_5">PolygonBalancingMode</a>);
00203 <font class="comment">// update _SumNbFacePass0</font>
00204 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o1">_SumNbFacePass0</a>+= it->second.getNbFaceAsked();
00205 }
00206
00207
00208 <font class="comment">// 2nd pass, compute Faces that will be drawed.</font>
00209 <font class="comment">//================</font>
00210 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o0">_LoadPass</a>= 1;
00211 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#c0">traverseVisibilityList</a>();
00212
00213 }
00214
00215
00216 <font class="comment">// ***************************************************************************</font>
<a name="l00217"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#c0">00217</a> <font class="keywordtype">void</font> CLoadBalancingTrav::traverseVisibilityList()
00218 {
00219 <font class="comment">// Traverse all nodes of the visibility list.</font>
00220 uint nObs= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o4">_VisibleList</a>.size();
00221 <font class="keywordflow">for</font>(uint i=0; i<nObs; i++)
00222 {
00223 IBaseLoadBalancingObs *loadBalObs= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o4">_VisibleList</a>[i];
00224 loadBalObs->traverse(NULL);
00225 }
00226 }
00227
00228
00229 <font class="comment">// ***************************************************************************</font>
<a name="l00230"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z528_4">00230</a> <font class="keywordtype">float</font> CLoadBalancingTrav::getNbFaceAsked ()<font class="keyword"> const</font>
00231 <font class="keyword"></font>{
00232 <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o1">_SumNbFacePass0</a>;
00233 }
00234
00235
00236 <font class="comment">// ***************************************************************************</font>
<a name="l00237"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#a3">00237</a> CLoadBalancingGroup *CLoadBalancingTrav::getOrCreateGroup(<font class="keyword">const</font> std::string &group)
00238 {
00239 <font class="comment">// find</font>
00240 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#u1">ItGroupMap</a> it;
00241 it= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.find(group);
00242 <font class="comment">// if not exist, create.</font>
00243 <font class="keywordflow">if</font>(it==<a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.end())
00244 {
00245 <font class="comment">// create and set name.</font>
00246 it= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.insert(make_pair(group, CLoadBalancingGroup())).first;
00247 it->second.Name= group;
00248 }
00249
00250 <font class="keywordflow">return</font> &(it->second);
00251 }
00252
00253 <font class="comment">// ***************************************************************************</font>
<a name="l00254"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z528_1">00254</a> <font class="keywordtype">void</font> CLoadBalancingTrav::setGroupNbFaceWanted(<font class="keyword">const</font> std::string &group, uint nFaces)
00255 {
00256 <font class="comment">// get/create if needed, and assign.</font>
00257 <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#a3">getOrCreateGroup</a>(group)->setNbFaceWanted(nFaces);
00258 }
00259
00260 <font class="comment">// ***************************************************************************</font>
<a name="l00261"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z528_2">00261</a> uint CLoadBalancingTrav::getGroupNbFaceWanted(<font class="keyword">const</font> std::string &group)
00262 {
00263 <font class="comment">// get/create if needed, and get.</font>
00264 <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#a3">getOrCreateGroup</a>(group)->getNbFaceWanted();
00265 }
00266
00267 <font class="comment">// ***************************************************************************</font>
<a name="l00268"></a><a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#z528_3">00268</a> <font class="keywordtype">float</font> CLoadBalancingTrav::getGroupNbFaceAsked (<font class="keyword">const</font> std::string &group)<font class="keyword"> const</font>
00269 <font class="keyword"></font>{
00270 TGroupMap::const_iterator it;
00271 it= <a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.find(group);
00272 <font class="keywordflow">if</font>(it==<a class="code" href="classNL3D_1_1CLoadBalancingTrav.html#o3">_GroupMap</a>.end())
00273 <font class="keywordflow">return</font> 0;
00274 <font class="keywordflow">else</font>
00275 <font class="keywordflow">return</font> it->second.getNbFaceAsked();
00276 }
00277
00278
00279 <font class="comment">// ***************************************************************************</font>
00280 <font class="comment">// ***************************************************************************</font>
00281 <font class="comment">// ***************************************************************************</font>
00282 <font class="comment">// ***************************************************************************</font>
00283
00284
00285 <font class="comment">// ***************************************************************************</font>
<a name="l00286"></a><a class="code" href="classNL3D_1_1IBaseLoadBalancingObs.html#a1">00286</a> <font class="keywordtype">void</font> IBaseLoadBalancingObs::init()
00287 {
00288 IObs::init();
00289 <a class="code" href="debug_8h.html#a6">nlassert</a>( dynamic_cast<IBaseHrcObs*> (<a class="code" href="classNL3D_1_1IObs.html#z620_1">getObs</a>(<a class="code" href="namespaceNL3D.html#a41">HrcTravId</a>)) );
00290 <a class="code" href="classNL3D_1_1IBaseLoadBalancingObs.html#m0">HrcObs</a>= static_cast<IBaseHrcObs*> (<a class="code" href="classNL3D_1_1IObs.html#z620_1">getObs</a>(<a class="code" href="namespaceNL3D.html#a41">HrcTravId</a>));
00291 <a class="code" href="debug_8h.html#a6">nlassert</a>( dynamic_cast<IBaseClipObs*> (<a class="code" href="classNL3D_1_1IObs.html#z620_1">getObs</a>(<a class="code" href="namespaceNL3D.html#a25">ClipTravId</a>)) );
00292 <a class="code" href="classNL3D_1_1IBaseLoadBalancingObs.html#m1">ClipObs</a>= static_cast<IBaseClipObs*> (<a class="code" href="classNL3D_1_1IObs.html#z620_1">getObs</a>(<a class="code" href="namespaceNL3D.html#a25">ClipTravId</a>));
00293
00294 <font class="comment">// assign me to the default group</font>
00295 <a class="code" href="classNL3D_1_1IBaseLoadBalancingObs.html#m2">LoadBalancingGroup</a>= ((CLoadBalancingTrav*)<a class="code" href="classNL3D_1_1IObs.html#m1">Trav</a>)->getDefaultGroup();
00296 }
00297
00298
00299
00300
00301 } <font class="comment">// NL3D</font>
</pre></div>
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