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+<hr><h1>surface_light_grid.cpp</h1><a href="surface__light__grid_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="surface__light__grid_8h.html">3d/surface_light_grid.h</a>"</font>
+00029 <font class="preprocessor">#include "<a class="code" href="common_8h.html">nel/misc/common.h</a>"</font>
+00030 <font class="preprocessor">#include "<a class="code" href="ig__surface__light_8h.html">3d/ig_surface_light.h</a>"</font>
+00031 <font class="preprocessor">#include "<a class="code" href="fast__floor_8h.html">3d/fast_floor.h</a>"</font>
+00032 <font class="preprocessor">#include "<a class="code" href="light__influence__interpolator_8h.html">3d/light_influence_interpolator.h</a>"</font>
+00033 <font class="preprocessor">#include "<a class="code" href="point__light__named_8h.html">3d/point_light_named.h</a>"</font>
+00034 <font class="preprocessor">#include "<a class="code" href="scene__group_8h.html">3d/scene_group.h</a>"</font>
+00035
+00036
+00037 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
+00038
+00039 <font class="keyword">namespace </font>NL3D {
+00040
+00041
+00042 <font class="comment">// ***************************************************************************</font>
+<a name="l00043"></a><a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#a0">00043</a> CSurfaceLightGrid::CSurfaceLightGrid()
+00044 {
+00045 <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m1">Width</a>= 0;
+00046 <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m2">Height</a>= 0;
+00047 }
+00048
+00049
+00050 <font class="comment">// ***************************************************************************</font>
+<a name="l00051"></a><a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#a2">00051</a> <font class="keywordtype">void</font> CSurfaceLightGrid::serial(<a class="code" href="classNLMISC_1_1IStream.html">NLMISC::IStream</a> &amp;f)
+00052 {
+00053 (void)f.<a class="code" href="classNLMISC_1_1IStream.html#a29">serialVersion</a>(0);
+00054 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(<a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m0">Origin</a>);
+00055 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(<a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m1">Width</a>);
+00056 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(<a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m2">Height</a>);
+00057 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(<a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m3">Cells</a>);
+00058 }
+00059
+00060
+00061 <font class="comment">// ***************************************************************************</font>
+<a name="l00062"></a><a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#a1">00062</a> <font class="keywordtype">void</font> CSurfaceLightGrid::getStaticLightSetup(<font class="keyword">const</font> CVector &amp;localPos, std::vector&lt;CPointLightInfluence&gt; &amp;pointLightList, uint8 &amp;sunContribution,
+00063 CIGSurfaceLight &amp;igsl, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> &amp;localAmbient)<font class="keyword"> const</font>
+00064 <font class="keyword"></font>{
+00065 <font class="comment">// Get local coordinate to the grid.</font>
+00066 <font class="keywordtype">float</font> xfloat= (localPos.x - <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m0">Origin</a>.<a class="code" href="classNLMISC_1_1CVector2f.html#m0">x</a>) * igsl.getOOCellSize();
+00067 <font class="keywordtype">float</font> yfloat= (localPos.y - <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m0">Origin</a>.<a class="code" href="classNLMISC_1_1CVector2f.html#m1">y</a>) * igsl.getOOCellSize();
+00068 sint wCell= <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m1">Width</a>-1;
+00069 sint hCell= <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m2">Height</a>-1;
+00070 <font class="comment">// fastFloor: use a precision of 256 to avoid doing OptFastFloorBegin.</font>
+00071 sint wfixed= wCell&lt;&lt;8;
+00072 sint hfixed= hCell&lt;&lt;8;
+00073 sint xfixed= <a class="code" href="namespaceNL3D.html#a362">OptFastFloor</a>(xfloat * 256);
+00074 sint yfixed= <a class="code" href="namespaceNL3D.html#a362">OptFastFloor</a>(yfloat * 256);
+00075 <a class="code" href="namespaceNLMISC.html#a215">clamp</a>(xfixed, 0, wfixed);
+00076 <a class="code" href="namespaceNLMISC.html#a215">clamp</a>(yfixed, 0, hfixed);
+00077 <font class="comment">// compute the cell coord, and the subCoord for bilinear.</font>
+00078 sint xCell, yCell, xSub, ySub;
+00079 xCell= xfixed&gt;&gt;8;
+00080 yCell= yfixed&gt;&gt;8;
+00081 <a class="code" href="namespaceNLMISC.html#a215">clamp</a>(xCell, 0, wCell-1);
+00082 <a class="code" href="namespaceNLMISC.html#a215">clamp</a>(yCell, 0, hCell-1);
+00083 <font class="comment">// Hence, xSub and ySub range is [0, 256].</font>
+00084 xSub= xfixed - (xCell&lt;&lt;8);
+00085 ySub= yfixed - (yCell&lt;&lt;8);
+00086
+00087
+00088 <font class="comment">// Use a CLightInfluenceInterpolator to biLinear light influence</font>
+00089 CLightInfluenceInterpolator interp;
+00090 <font class="comment">// Must support only 2 light per cell corner.</font>
+00091 <a class="code" href="debug_8h.html#a6">nlassert</a>(CSurfaceLightGrid::NumLightPerCorner==2);
+00092 <a class="code" href="debug_8h.html#a6">nlassert</a>(CLightInfluenceInterpolator::NumLightPerCorner==2);
+00093 <font class="comment">// Get ref on array of PointLightNamed.</font>
+00094 CPointLightNamed *igPointLights= NULL;;
+00095 <font class="keywordflow">if</font>( igsl._Owner-&gt;getPointLightList().size() &gt;0 )
+00096 {
+00097 <font class="comment">// const_cast, because will only change _IdInfluence, and </font>
+00098 <font class="comment">// also because CLightingManager will call appendLightedModel()</font>
+00099 igPointLights= const_cast&lt;CPointLightNamed*&gt;(&amp;(igsl._Owner-&gt;getPointLightList()[0]));
+00100 }
+00101 <font class="comment">// For 4 corners.</font>
+00102 uint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>,<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>;
+00103 uint sunContribFixed= 0;
+00104 uint rLocalAmbientFixed= 0;
+00105 uint gLocalAmbientFixed= 0;
+00106 uint bLocalAmbientFixed= 0;
+00107 uint aLocalAmbientFixed= 0;
+00108 <font class="keywordflow">for</font>(<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>=0;<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>&lt;2;<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>++)
+00109 {
+00110 <font class="keywordflow">for</font>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>=0;<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>&lt;2;<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>++)
+00111 {
+00112 <font class="comment">// Prepare compute for PointLights.</font>
+00113 <font class="comment">//-------------</font>
+00114 <font class="comment">// get ref on TLI, and on corner.</font>
+00115 <font class="keyword">const</font> CCellCorner &amp;cellCorner= <a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m3">Cells</a>[ (yCell+<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>)*<a class="code" href="classNL3D_1_1CSurfaceLightGrid.html#m1">Width</a> + xCell+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> ];
+00116 CLightInfluenceInterpolator::CCorner &amp;corner= interp.Corners[<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>*2 + <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>];
+00117 <font class="comment">// For all lights</font>
+00118 uint lid;
+00119 <font class="keywordflow">for</font>(lid= 0; lid&lt;CSurfaceLightGrid::NumLightPerCorner; lid++)
+00120 {
+00121 <font class="comment">// get the id of the light in the ig</font>
+00122 uint igLightId= cellCorner.Light[lid];
+00123 <font class="comment">// If empty id, stop</font>
+00124 <font class="keywordflow">if</font>(igLightId==0xFF)
+00125 <font class="keywordflow">break</font>;
+00126 <font class="keywordflow">else</font>
+00127 {
+00128 <font class="comment">// Set pointer of the light in the corner</font>
+00129 corner.Lights[lid]= igPointLights + igLightId;
+00130 }
+00131 }
+00132 <font class="comment">// Reset Empty slots.</font>
+00133 <font class="keywordflow">for</font>(; lid&lt;CSurfaceLightGrid::NumLightPerCorner; lid++)
+00134 {
+00135 <font class="comment">// set to NULL</font>
+00136 corner.Lights[lid]= NULL;
+00137 }
+00138
+00139 <font class="comment">// BiLinear SunContribution.</font>
+00140 <font class="comment">//-------------</font>
+00141 uint xBi= (<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>==0)?256-xSub : xSub;
+00142 uint yBi= (<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>==0)?256-ySub : ySub;
+00143 uint mulBi= xBi * yBi;
+00144 sunContribFixed+= cellCorner.SunContribution * mulBi;
+00145
+00146
+00147 <font class="comment">// BiLinear Ambient Contribution.</font>
+00148 <font class="comment">//-------------</font>
+00149 <font class="comment">// If FF, then take Sun Ambient =&gt; leave color and alpha To 0.</font>
+00150 <font class="keywordflow">if</font>(cellCorner.LocalAmbientId!=0xFF)
+00151 {
+00152 <font class="comment">// take current ambient from pointLight</font>
+00153 CRGBA ambCorner= igPointLights[cellCorner.LocalAmbientId].getAmbient();
+00154 rLocalAmbientFixed+= ambCorner.R * mulBi;
+00155 gLocalAmbientFixed+= ambCorner.G * mulBi;
+00156 bLocalAmbientFixed+= ambCorner.B * mulBi;
+00157 <font class="comment">// increase the influence of igPointLights in alpha</font>
+00158 aLocalAmbientFixed+= 255 * mulBi;
+00159 }
+00160 }
+00161 }
+00162 <font class="comment">// interpolate PointLights.</font>
+00163 interp.interpolate(pointLightList, xSub/256.f, ySub/256.f);
+00164
+00165 <font class="comment">// Final SunContribution</font>
+00166 sunContribution= sunContribFixed&gt;&gt;16;
+00167
+00168 <font class="comment">// Final SunContribution</font>
+00169 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m0">R</a>= rLocalAmbientFixed&gt;&gt;16;
+00170 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m1">G</a>= gLocalAmbientFixed&gt;&gt;16;
+00171 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m2">B</a>= bLocalAmbientFixed&gt;&gt;16;
+00172 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m3">A</a>= aLocalAmbientFixed&gt;&gt;16;
+00173
+00174 }
+00175
+00176
+00177
+00178 } <font class="comment">// NL3D</font>
+</pre></div>
+
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