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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>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> + +<!-- 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> |