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class="qindex" href="pages.html">Related Pages</a> <a class="qindexRef" doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>quad_grid_clip_cluster.cpp</h1><a href="quad__grid__clip__cluster_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="quad__grid__clip__cluster_8h.html">3d/quad_grid_clip_cluster.h</a>"</font> +00029 +00030 +00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC; +00032 <font class="keyword">using</font> <font class="keyword">namespace </font>std; +00033 +00034 +00035 <font class="keyword">namespace </font>NL3D { +00036 +00037 +00038 <font class="comment">// ***************************************************************************</font> +<a name="l00039"></a><a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#d0">00039</a> <font class="keywordtype">void</font> CQuadGridClipCluster::registerBasic() +00040 { +00041 CMOT::registerModel( <a class="code" href="namespaceNL3D.html#a224">QuadGridClipClusterId</a>, 0, CQuadGridClipCluster::creator); +00042 CMOT::registerObs( <a class="code" href="namespaceNL3D.html#a25">ClipTravId</a>, <a class="code" href="namespaceNL3D.html#a224">QuadGridClipClusterId</a>, CQuadGridClipClusterClipObs::creator ); +00043 } +00044 +00045 +00046 <font class="comment">// ***************************************************************************</font> +<a name="l00047"></a><a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#a0">00047</a> <font class="keywordtype">void</font> CQuadGridClipCluster::extendCluster(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CAABBox.html">NLMISC::CAABBox</a> &worldBBox) +00048 { +00049 <font class="keywordflow">if</font>(_Empty) +00050 { +00051 <a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#o1">_Empty</a>= <font class="keyword">false</font>; +00052 <a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#o0">_BBox</a>= worldBBox; +00053 } +00054 <font class="keywordflow">else</font> +00055 { +00056 <font class="comment">// extend the bbox with 2 corners of the incoming bbox (sufficient for an AABBox).</font> +00057 <a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#o0">_BBox</a>.<a class="code" href="classNLMISC_1_1CAABBox.html#z263_4">extend</a>( worldBBox.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_4">getCenter</a>() + worldBBox.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_5">getHalfSize</a>() ); +00058 <a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#o0">_BBox</a>.<a class="code" href="classNLMISC_1_1CAABBox.html#z263_4">extend</a>( worldBBox.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_4">getCenter</a>() - worldBBox.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_5">getHalfSize</a>() ); +00059 } +00060 +00061 <font class="comment">// update _Radius</font> +00062 <a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#o3">_Radius</a>= <a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#o0">_BBox</a>.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_8">getRadius</a>(); +00063 } +00064 +00065 +00066 <font class="comment">// ***************************************************************************</font> +<a name="l00067"></a><a class="code" href="classNL3D_1_1CQuadGridClipCluster.html#a2">00067</a> <font class="keywordtype">void</font> CQuadGridClipCluster::update() +00068 { +00069 <font class="comment">// never need to update, so unlink me from ValidateList.</font> +00070 <a class="code" href="classNL3D_1_1IModel.html#z616_3">unlinkFromValidateList</a>(); +00071 } +00072 +00073 +00074 <font class="comment">// ***************************************************************************</font> +<a name="l00075"></a><a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#a0">00075</a> CQuadGridClipClusterClipObs::CQuadGridClipClusterClipObs() +00076 { +00077 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o0">_LastClipWasDistMaxClip</a>= <font class="keyword">false</font>; +00078 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o1">_LastClipWasFrustumClip</a>= <font class="keyword">false</font>; +00079 } +00080 +00081 <font class="comment">// ***************************************************************************</font> +<a name="l00082"></a><a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#z744_0">00082</a> <font class="keywordtype">void</font> CQuadGridClipClusterClipObs::traverse(IObs *caller) +00083 { +00084 CQuadGridClipCluster *cluster= (CQuadGridClipCluster*)<a class="code" href="classNL3D_1_1IObs.html#m0">Model</a>; +00085 CClipTrav *clipTrav= (CClipTrav*)<a class="code" href="classNL3D_1_1IObs.html#m1">Trav</a>; +00086 +00087 <font class="comment">// if empty, just return (not visible at all).</font> +00088 <font class="keywordflow">if</font>(cluster->_Empty) +00089 { +00090 <font class="comment">/* reset cache, to be sure that any instances added to this cluster later will </font> +00091 <font class="comment"> be correctly updated if a clip of this cluster occurs.</font> +00092 <font class="comment"> */</font> +00093 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o0">_LastClipWasDistMaxClip</a>= <font class="keyword">false</font>; +00094 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o1">_LastClipWasFrustumClip</a>= <font class="keyword">false</font>; +00095 <font class="keywordflow">return</font>; +00096 } +00097 +00098 <font class="comment">// First, clip DistMax.</font> +00099 CAABBox &bbox= cluster->_BBox; +00100 <font class="comment">// if clip DistMax enabled</font> +00101 <font class="keywordflow">if</font>(cluster->_DistMax!=-1) +00102 { +00103 CVector c= bbox.getCenter(); +00104 <font class="keywordtype">float</font> dist= (c - clipTrav->CamPos).norm(); +00105 <font class="comment">// it the bbox is entirely out the distMax</font> +00106 <font class="keywordflow">if</font>( dist-cluster->_Radius > cluster->_DistMax ) +00107 { +00108 <font class="comment">// if the cluster was DistMax-visible at last frame</font> +00109 <font class="keywordflow">if</font>( !<a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o0">_LastClipWasDistMaxClip</a> ) +00110 { +00111 <font class="comment">// Advert sons of the clip. Important for CMeshMultiLodInstace. Do it for me and my sons.</font> +00112 <a class="code" href="classNL3D_1_1IBaseClipObs.html#a5">forceClip</a>(IBaseClipObs::DistMaxClip); +00113 <font class="comment">// new state.</font> +00114 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o0">_LastClipWasDistMaxClip</a>= <font class="keyword">true</font>; +00115 } +00116 <font class="comment">// quit</font> +00117 <font class="keywordflow">return</font>; +00118 } +00119 <font class="keywordflow">else</font> +00120 { +00121 <font class="comment">// reset.</font> +00122 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o0">_LastClipWasDistMaxClip</a>= <font class="keyword">false</font>; +00123 } +00124 } +00125 +00126 <font class="comment">// Then clip against pyramid</font> +00127 <font class="keywordtype">bool</font> unspecified= <font class="keyword">false</font>; +00128 <font class="keywordtype">bool</font> visible= <font class="keyword">true</font>; +00129 <font class="keywordflow">for</font>(sint i=0;i<(sint)clipTrav->WorldPyramid.size();i++) +00130 { +00131 <font class="comment">// We are sure that pyramid has normalized plane normals.</font> +00132 <font class="keywordflow">if</font>(!bbox.clipBack(clipTrav->WorldPyramid[i])) +00133 { +00134 visible= <font class="keyword">false</font>; +00135 <font class="keywordflow">break</font>; +00136 } +00137 <font class="comment">// else test is the bbox is partially or fully in the plane</font> +00138 <font class="keywordflow">else</font> <font class="keywordflow">if</font>(!unspecified) +00139 { +00140 <font class="comment">// if clipFront AND clipBack, it means partially.</font> +00141 <font class="keywordflow">if</font>(bbox.clipFront(clipTrav->WorldPyramid[i])) +00142 unspecified= <font class="keyword">true</font>; +00143 } +00144 } +00145 +00146 <font class="comment">// if ! visible at all, just skip sons.</font> +00147 <font class="keywordflow">if</font>(!visible) +00148 { +00149 <font class="comment">// if the cluster was frustum visible at last frame</font> +00150 <font class="keywordflow">if</font>( !<a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o1">_LastClipWasFrustumClip</a> ) +00151 { +00152 <font class="comment">// Advert sons of the clip. Do it for me and my sons.</font> +00153 <a class="code" href="classNL3D_1_1IBaseClipObs.html#a5">forceClip</a>(IBaseClipObs::FrustumClip); +00154 <font class="comment">// new state.</font> +00155 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o1">_LastClipWasFrustumClip</a>= <font class="keyword">true</font>; +00156 } +00157 } +00158 <font class="keywordflow">else</font> +00159 { +00160 <font class="comment">// reset frustum clip cache.</font> +00161 <a class="code" href="classNL3D_1_1CQuadGridClipClusterClipObs.html#o1">_LastClipWasFrustumClip</a>= <font class="keyword">false</font>; +00162 +00163 <font class="comment">// clip sons.</font> +00164 <font class="keywordflow">if</font>(unspecified) +00165 { +00166 <font class="comment">// clip the sons individually </font> +00167 <a class="code" href="classNL3D_1_1IObs.html#z620_0">traverseSons</a>(); +00168 } +00169 <font class="keywordflow">else</font> +00170 { +00171 <font class="comment">// udpdate the sons, but don't clip, because we know they are fully visible.</font> +00172 clipTrav->ForceNoFrustumClip= <font class="keyword">true</font>; +00173 <a class="code" href="classNL3D_1_1IObs.html#z620_0">traverseSons</a>(); +00174 clipTrav->ForceNoFrustumClip= <font class="keyword">false</font>; +00175 } +00176 } +00177 } +00178 +00179 +00180 } <font class="comment">// NL3D</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |