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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> &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 &localPos, std::vector<CPointLightInfluence> &pointLightList, uint8 &sunContribution,
00063 CIGSurfaceLight &igsl, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> &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<<8;
00072 sint hfixed= hCell<<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>>8;
00080 yCell= yfixed>>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<<8);
00085 ySub= yfixed - (yCell<<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->getPointLightList().size() >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<CPointLightNamed*>(&(igsl._Owner->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><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><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 &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 &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<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<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 => 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>>16;
00167
00168 <font class="comment">// Final SunContribution</font>
00169 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m0">R</a>= rLocalAmbientFixed>>16;
00170 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m1">G</a>= gLocalAmbientFixed>>16;
00171 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m2">B</a>= bLocalAmbientFixed>>16;
00172 localAmbient.<a class="code" href="classNLMISC_1_1CRGBA.html#m3">A</a>= aLocalAmbientFixed>>16;
00173
00174 }
00175
00176
00177
00178 } <font class="comment">// NL3D</font>
</pre></div>
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