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<hr><h1>mesh_multi_lod_instance.cpp</h1><a href="mesh__multi__lod__instance_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="mesh__multi__lod__instance_8h.html">3d/mesh_multi_lod_instance.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="mesh__multi__lod_8h.html">3d/mesh_multi_lod.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="coarse__mesh__manager_8h.html">3d/coarse_mesh_manager.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="scene_8h.html">3d/scene.h</a>"</font>
00032 
00033 <font class="preprocessor">#include "<a class="code" href="debug_8h.html">nel/misc/debug.h</a>"</font>
00034 
00035 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00036 
00037 <font class="keyword">namespace </font>NL3D 
00038 {
00039 
00040 <font class="comment">// ***************************************************************************</font>
00041 
<a name="l00042"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a0">00042</a>         CMeshMultiLodInstance::CMeshMultiLodInstance ()
00043 {
00044         <font class="comment">// No flags</font>
00045         <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o2">Flags</a>=0;
00046         <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o7">_CoarseMeshDistance</a> = -1.f;
00047 }
00048 
00049 <font class="comment">// ***************************************************************************</font>
00050 
<a name="l00051"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a1">00051</a> CMeshMultiLodInstance::~CMeshMultiLodInstance ()
00052 {
00053         <font class="comment">// delete instances from manager</font>
00054         <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a3">deleteCoarseInstances</a>();
00055 }
00056 
00057 
00058 <font class="comment">// ***************************************************************************</font>
00059 
<a name="l00060"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#d0">00060</a> <font class="keywordtype">void</font>            CMeshMultiLodInstance::registerBasic()
00061 {
00062         CMOT::registerModel (<a class="code" href="namespaceNL3D.html#a144">MeshMultiLodInstanceId</a>, <a class="code" href="namespaceNL3D.html#a140">MeshBaseInstanceId</a>, CMeshMultiLodInstance::creator);
00063         CMOT::registerObs (<a class="code" href="namespaceNL3D.html#a93">LoadBalancingTravId</a>, <a class="code" href="namespaceNL3D.html#a144">MeshMultiLodInstanceId</a>, CMeshMultiLodBalancingObs::creator);
00064         CMOT::registerObs (<a class="code" href="namespaceNL3D.html#a25">ClipTravId</a>, <a class="code" href="namespaceNL3D.html#a144">MeshMultiLodInstanceId</a>, CMeshMultiLodClipObs::creator);
00065 }
00066 
00067 
00068 <font class="comment">// ***************************************************************************</font>
<a name="l00069"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a3">00069</a> <font class="keywordtype">void</font>            CMeshMultiLodInstance::deleteCoarseInstances()
00070 {
00071         <font class="comment">// If at least one coarse instance is created</font>
00072         <font class="keywordflow">if</font>( <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o2">Flags</a> &amp; (<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#s3s1">Coarse0Loaded</a>|<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#s3s2">Coarse1Loaded</a>) )
00073         {
00074                 <font class="comment">// Cast shape</font>
00075                 <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#l0">CMeshMultiLod</a> *shape=safe_cast&lt;CMeshMultiLod*&gt; ((IShape*)<a class="code" href="classNL3D_1_1CTransformShape.html#m0">Shape</a>);
00076 
00077                 <font class="comment">// Manager pointer</font>
00078                 CCoarseMeshManager *manager;
00079 
00080                 <font class="comment">// Get the manager</font>
00081                 <font class="keywordflow">if</font> (shape-&gt;isStatic ())
00082                         manager=<a class="code" href="classNL3D_1_1CMeshBaseInstance.html#a1">getScene</a>()-&gt;getStaticCoarseMeshManager ();
00083                 <font class="keywordflow">else</font>
00084                         manager=<a class="code" href="classNL3D_1_1CMeshBaseInstance.html#a1">getScene</a>()-&gt;getDynamicCoarseMeshManager ();
00085 
00086                 <font class="comment">// Manager ok ?</font>
00087                 <font class="keywordflow">if</font> (manager)
00088                 {
00089                         <font class="comment">// Coarse mesh loaded ?</font>
00090                         <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o2">Flags</a>&amp;<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#s3s1">Coarse0Loaded</a>)
00091                         {
00092                                 manager-&gt;removeMesh (<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o3">CoarseMeshId</a>[0]);
00093                                 <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o2">Flags</a>&amp;= ~<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#s3s1">Coarse0Loaded</a>;
00094                         }
00095                         <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o2">Flags</a>&amp;<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#s3s2">Coarse1Loaded</a>)
00096                         {
00097                                 manager-&gt;removeMesh (<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o3">CoarseMeshId</a>[1]);
00098                                 <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o2">Flags</a>&amp;= ~<a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#s3s2">Coarse1Loaded</a>;
00099                         }
00100                 }
00101         }
00102 }
00103 
00104 
00105 <font class="comment">// ***************************************************************************</font>
<a name="l00106"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#c0">00106</a> CRGBA           CMeshMultiLodInstance::getCoarseMeshLighting()
00107 {
00108         CScene  *scene= <a class="code" href="classNL3D_1_1CMeshBaseInstance.html#a1">getScene</a>();
00109         <a class="code" href="debug_8h.html#a6">nlassert</a>(scene);
00110 
00111         <font class="comment">// compute his sun contribution result, and update</font>
00112         CRGBA   sunContrib= scene-&gt;getSunDiffuse();
00113         <font class="comment">// simulate/average diffuse lighting over the mesh by dividing diffuse by 2.</font>
00114         sunContrib.modulateFromuiRGBOnly(sunContrib, <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a4">getLightContribution</a>().SunContribution/2 );
00115         <font class="comment">// Add Ambient</font>
00116         sunContrib.addRGBOnly(sunContrib, scene-&gt;getSunAmbient());
00117         sunContrib.A= 255;
00118 
00119         <font class="keywordflow">return</font> sunContrib;
00120 }
00121 
00122 
00123 <font class="comment">// ***************************************************************************</font>
<a name="l00124"></a><a class="code" href="classNL3D_1_1CMeshMultiLodClipObs.html#a0">00124</a> <font class="keywordtype">bool</font>            CMeshMultiLodClipObs::clip(IBaseClipObs *caller)
00125 {
00126         <font class="comment">// Call Base method. If clipped</font>
00127         <font class="keywordflow">if</font>( !CTransformShapeClipObs::clip(caller) )
00128         {
00129                 <font class="comment">// If the clip is due to a DistMax reason, must delete Coarses instances.</font>
00130                 <font class="keywordflow">if</font>(CTransformShapeClipObs::isLastClipDueToDistMax())
00131                 {
00132                         CMeshMultiLodInstance   *inst= (CMeshMultiLodInstance*)<a class="code" href="classNL3D_1_1IObs.html#m0">Model</a>;
00133                         inst-&gt;deleteCoarseInstances();
00134                 }
00135 
00136                 <font class="comment">// return result of clip</font>
00137                 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00138         }
00139         <font class="keywordflow">else</font>
00140                 <font class="comment">// return result of clip</font>
00141                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00142 }
00143 
00144 
00145 <font class="comment">// ***************************************************************************</font>
<a name="l00146"></a><a class="code" href="classNL3D_1_1CMeshMultiLodClipObs.html#a1">00146</a> <font class="keywordtype">void</font>            CMeshMultiLodClipObs::forceClip(TClipReason clipReason)
00147 {
00148         <font class="comment">// If the clip is due to a DistMax reason, must delete Coarses instances.</font>
00149         <font class="keywordflow">if</font>(clipReason == IBaseClipObs::DistMaxClip)
00150         {
00151                 CMeshMultiLodInstance   *inst= (CMeshMultiLodInstance*)<a class="code" href="classNL3D_1_1IObs.html#m0">Model</a>;
00152                 inst-&gt;deleteCoarseInstances();
00153         }
00154 
00155         <font class="comment">// Call Base method (traverse Sons)</font>
00156         CTransformShapeClipObs::forceClip(clipReason);
00157 }
00158 
00159 
00160 <font class="comment">// ***************************************************************************</font>
00161 
<a name="l00162"></a><a class="code" href="classNL3D_1_1CMeshMultiLodBalancingObs.html#a0">00162</a> <font class="keywordtype">void</font>            CMeshMultiLodBalancingObs::traverse(IObs *caller)
00163 {
00164         <font class="comment">// Call previous</font>
00165         CTransformShapeLoadBalancingObs::traverse (caller);
00166 
00167         <font class="comment">// If this is the second pass of LoadBalancing, choose the Lods, according to getNumTrianglesAfterLoadBalancing()</font>
00168         CLoadBalancingTrav              *loadTrav= (CLoadBalancingTrav*)<a class="code" href="classNL3D_1_1IObs.html#m1">Trav</a>;
00169         <font class="keywordflow">if</font>(loadTrav-&gt;getLoadPass()==1)
00170         {
00171                 <font class="comment">// Get a pointer on the model</font>
00172                 CMeshMultiLodInstance *model=safe_cast&lt;CMeshMultiLodInstance*&gt; (Model);
00173 
00174                 <font class="comment">// Get a pointer on the shape</font>
00175                 CMeshMultiLod *shape=safe_cast&lt;CMeshMultiLod*&gt; ((IShape*)model-&gt;Shape);
00176 
00177                 <font class="comment">// Reset render pass</font>
00178                 model-&gt;setTransparency(<font class="keyword">false</font>);
00179                 model-&gt;setOpacity(<font class="keyword">false</font>);
00180 
00181                 <font class="comment">// Get the wanted number of polygons</font>
00182                 <font class="keywordtype">float</font> polygonCount=model-&gt;getNumTrianglesAfterLoadBalancing ();
00183 
00184                 <font class="comment">// Look for the good slot</font>
00185                 uint meshCount=shape-&gt;_MeshVector.size();
00186                 model-&gt;Lod0=0;
00187                 <font class="keywordflow">if</font> (meshCount&gt;1)
00188                 {
00189                         <font class="comment">// Look for good i</font>
00190                         <font class="keywordflow">while</font> ( polygonCount &lt; shape-&gt;_MeshVector[model-&gt;Lod0].EndPolygonCount )
00191                         {
00192                                 model-&gt;Lod0++;
00193                                 <font class="keywordflow">if</font> (model-&gt;Lod0==meshCount-1)
00194                                         <font class="keywordflow">break</font>;
00195                         }
00196                 }
00197                 
00198                 <font class="comment">// The slot</font>
00199                 CMeshMultiLod::CMeshSlot        &amp;slot=shape-&gt;_MeshVector[model-&gt;Lod0];
00200 
00201                 <font class="comment">// Get the distance with polygon count</font>
00202                 <font class="keywordtype">float</font> distance=(polygonCount-slot.B)/slot.A;
00203 
00204                 <font class="comment">// Get the final polygon count</font>
00205                 <font class="keywordflow">if</font> (slot.MeshGeom)
00206                         model-&gt;PolygonCountLod0=slot.MeshGeom-&gt;getNumTriangles (distance);
00207 
00208                 <font class="comment">// Second slot in use ?</font>
00209                 model-&gt;Lod1=0xffffffff;
00210 
00211                 <font class="comment">// The next slot</font>
00212                 CMeshMultiLod::CMeshSlot        *nextSlot=NULL;
00213 
00214                 <font class="comment">// Next slot exist ?</font>
00215                 <font class="keywordflow">if</font> (model-&gt;Lod0!=meshCount-1)
00216                 {
00217                         nextSlot=&amp;(shape-&gt;_MeshVector[model-&gt;Lod0+1]);
00218                 }
00219 
00220                 <font class="comment">// Max dist before blend</font>
00221                 <font class="keywordtype">float</font> startBlend;
00222                 <font class="keywordflow">if</font> (nextSlot)
00223                         startBlend=slot.DistMax-nextSlot-&gt;BlendLength;
00224                 <font class="keywordflow">else</font>
00225                         startBlend=slot.DistMax-slot.BlendLength;
00226 
00227                 <font class="comment">// In blend zone ?</font>
00228                 <font class="keywordflow">if</font> ( startBlend &lt; distance )
00229                 {
00230                         <font class="comment">// Alpha factor for main Lod</font>
00231                         model-&gt;BlendFactor = (slot.DistMax-distance)/(slot.DistMax-startBlend);
00232                         <font class="keywordflow">if</font> (model-&gt;BlendFactor&lt;0)
00233                                 model-&gt;BlendFactor=0;
00234                         <a class="code" href="debug_8h.html#a6">nlassert</a> (model-&gt;BlendFactor&lt;=1);
00235 
00236                         <font class="comment">// Render this mesh</font>
00237                         <font class="keywordflow">if</font> (slot.MeshGeom)
00238                         {
00239                                 <font class="keywordflow">if</font> (slot.Flags&amp;CMeshMultiLod::CMeshSlot::BlendOut)
00240                                 {
00241                                         <font class="comment">// Render the geom mesh with alpha blending with goodPolyCount</font>
00242                                         model-&gt;setTransparency(<font class="keyword">true</font>);
00243                                         model-&gt;Flags|=CMeshMultiLodInstance::Lod0Blend;
00244                                 }
00245                                 <font class="keywordflow">else</font>
00246                                 {
00247                                         <font class="comment">// Render the geom mesh without alpha blending with goodPolyCount</font>
00248                                         model-&gt;setTransparency (slot.isTransparent());
00249                                         model-&gt;setOpacity (slot.isOpaque());
00250                                         model-&gt;Flags&amp;=~CMeshMultiLodInstance::Lod0Blend;
00251                                 }
00252                         }
00253                         <font class="keywordflow">else</font>
00254                                 model-&gt;Lod0=0xffffffff;
00255 
00256                         <font class="comment">// Next mesh, BlendIn actived ?</font>
00257                         <font class="keywordflow">if</font> (nextSlot &amp;&amp; shape-&gt;_MeshVector[model-&gt;Lod0+1].MeshGeom &amp;&amp; (nextSlot-&gt;Flags&amp;CMeshMultiLod::CMeshSlot::BlendIn))
00258                         {
00259                                 <font class="comment">// Render the geom mesh with alpha blending with nextSlot-&gt;BeginPolygonCount</font>
00260                                 model-&gt;PolygonCountLod1=nextSlot-&gt;MeshGeom-&gt;getNumTriangles (distance);
00261                                 model-&gt;Lod1=model-&gt;Lod0+1;
00262                                 model-&gt;setTransparency(<font class="keyword">true</font>);
00263                         }
00264                 }
00265                 <font class="keywordflow">else</font>
00266                 {
00267                         <font class="keywordflow">if</font> (slot.MeshGeom)
00268                         {
00269                                 <font class="comment">// Render without blend with goodPolyCount</font>
00270                                 model-&gt;setTransparency (slot.isTransparent());
00271                                 model-&gt;setOpacity (slot.isOpaque());
00272                                 model-&gt;Flags&amp;=~CMeshMultiLodInstance::Lod0Blend;
00273                         }
00274                         <font class="keywordflow">else</font>
00275                                 model-&gt;Lod0=0xffffffff;
00276                 }
00277         }
00278 }
00279 
00280 <font class="comment">// ***************************************************************************</font>
<a name="l00281"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a2">00281</a> <font class="keywordtype">void</font>            CMeshMultiLodInstance::changeMRMDistanceSetup(<font class="keywordtype">float</font> distanceFinest, <font class="keywordtype">float</font> distanceMiddle, <font class="keywordtype">float</font> distanceCoarsest)
00282 {
00283         <font class="keywordflow">if</font>(Shape)
00284         {
00285                 <font class="comment">// Get a pointer on the shape.</font>
00286                 <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#l0">CMeshMultiLod</a> *pMesh =safe_cast&lt;CMeshMultiLod*&gt; ((IShape*)<a class="code" href="classNL3D_1_1CTransformShape.html#m0">Shape</a>);
00287                 <font class="comment">// Affect the mesh directly.</font>
00288                 pMesh-&gt;changeMRMDistanceSetup(distanceFinest, distanceMiddle, distanceCoarsest);
00289         }
00290 }
00291 
00292 
00293 <font class="comment">// ***************************************************************************</font>
<a name="l00294"></a><a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#a7">00294</a> <font class="keywordtype">float</font>      CMeshMultiLodInstance::getNumTriangles (<font class="keywordtype">float</font> distance)
00295 {
00296         <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#l0">CMeshMultiLod</a> *shape = safe_cast&lt;CMeshMultiLod*&gt; ((IShape*)<a class="code" href="classNL3D_1_1CTransformShape.html#m0">Shape</a>);
00297         <font class="keywordflow">return</font> shape-&gt;getNumTrianglesWithCoarsestDist(distance, <a class="code" href="classNL3D_1_1CMeshMultiLodInstance.html#o7">_CoarseMeshDistance</a>);   
00298 }
00299 
00300 } <font class="comment">// NL3D</font>
</pre></div>

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