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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
committerneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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+<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> &amp;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-&gt;_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 &amp;bbox= cluster-&gt;_BBox;
+00100 <font class="comment">// if clip DistMax enabled</font>
+00101 <font class="keywordflow">if</font>(cluster-&gt;_DistMax!=-1)
+00102 {
+00103 CVector c= bbox.getCenter();
+00104 <font class="keywordtype">float</font> dist= (c - clipTrav-&gt;CamPos).norm();
+00105 <font class="comment">// it the bbox is entirely out the distMax</font>
+00106 <font class="keywordflow">if</font>( dist-cluster-&gt;_Radius &gt; cluster-&gt;_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&lt;(sint)clipTrav-&gt;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-&gt;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-&gt;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-&gt;ForceNoFrustumClip= <font class="keyword">true</font>;
+00173 <a class="code" href="classNL3D_1_1IObs.html#z620_0">traverseSons</a>();
+00174 clipTrav-&gt;ForceNoFrustumClip= <font class="keyword">false</font>;
+00175 }
+00176 }
+00177 }
+00178
+00179
+00180 } <font class="comment">// NL3D</font>
+</pre></div>
+
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