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<hr><h1>cube_map_builder.cpp</h1><a href="cube__map__builder_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 
00029 
00030 <font class="preprocessor">#include "<a class="code" href="cube__map__builder_8h.html">3d/cube_map_builder.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="texture__cube_8h.html">3d/texture_cube.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="texture__mem_8h.html">3d/texture_mem.h</a>"</font>
00033 <font class="preprocessor">#include "<a class="code" href="vector_8h.html">nel/misc/vector.h</a>"</font>
00034 <font class="preprocessor">#include "<a class="code" href="rgba_8h.html">nel/misc/rgba.h</a>"</font>
00035 
00036 
00037 
00038 
00039 <font class="keyword">namespace </font>NL3D
00040 {
00041 
00042 
00043 <font class="comment">// utility function : build  a side of a cube map</font>
00044 <font class="keyword">static</font> uint8 *<a class="code" href="namespaceNL3D.html#a319">BuildCubeMapTex</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;start,
00045                                                           <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;uDir,
00046                                                           <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;vDir,
00047                                                           uint size,
00048                                                           ICubeMapFunctor &amp;f
00049                                                          )
00050 {
00051         <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> *map = <font class="keyword">new</font> <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a>[size * size];
00052         NLMISC::CRGBA *destTexel = map;
00053         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> currN = start;
00054         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> uStep = (2.f / size) * uDir;
00055         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> vStep = (2.f / size) * vDir;
00056 
00057         <font class="keywordflow">for</font> (uint <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; size; ++<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>)
00058         {
00059                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> hCurrN = currN;
00060                 <font class="keywordflow">for</font> (uint <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; size; ++<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>)
00061                 {                                               
00062                         destTexel[<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> *size] = f(hCurrN.<a class="code" href="classNLMISC_1_1CVector.html#z331_5">normed</a>());                    
00063                         hCurrN += uStep;
00064                 }
00065                 currN += vStep;
00066         }
00067         <font class="keywordflow">return</font> (uint8 *) map;
00068 }
00069 
00070 <font class="comment">// utility function : build  a side of a cube map, with luminance only</font>
00071 <font class="keyword">static</font> uint8 *<a class="code" href="namespaceNL3D.html#a320">BuildCubeMapTexLuminance</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;start,
00072                                                           <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;uDir,
00073                                                           <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;vDir,
00074                                                           uint size,
00075                                                           ICubeMapFunctor &amp;f
00076                                                          )
00077 {
00078         uint8 *map = <font class="keyword">new</font> uint8[size * size];
00079         uint8 *destTexel = map;
00080         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> currN = start;
00081         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> uStep = (2.f / size) * uDir;
00082         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> vStep = (2.f / size) * vDir;
00083 
00084         <font class="keywordflow">for</font> (uint <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; size; ++<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>)
00085         {
00086                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> hCurrN = currN;
00087                 <font class="keywordflow">for</font> (uint <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; size; ++<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>)
00088                 {                                               
00089                         destTexel[<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> *size] = f(hCurrN.<a class="code" href="classNLMISC_1_1CVector.html#z331_5">normed</a>()).A;          
00090                         hCurrN += uStep;
00091                 }
00092                 currN += vStep;
00093         }
00094         <font class="keywordflow">return</font> map;
00095 }
00096 
00097 
00098 
00099 CTextureCube *<a class="code" href="namespaceNL3D.html#a321">BuildCubeMap</a>(sint mapSize, ICubeMapFunctor &amp;f, <font class="keywordtype">bool</font> luminanceOnly <font class="comment">/* = false*/</font>, <font class="keyword">const</font> std::string &amp;shareName <font class="comment">/* = "" */</font>)
00100 {       
00101         std::auto_ptr&lt;CTextureCube&gt; cubeMap(<font class="keyword">new</font> CTextureCube);
00102         std::auto_ptr&lt;CTextureMem&gt; faces[6];            
00103 
00105         <font class="keyword">static</font> <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> start[] = 
00106         { 
00107                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(1, 1, 1),               
00108                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(-1, 1, -1),             
00109                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(-1, 1, -1),             
00110                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(-1, -1, 1),             
00111                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(-1, 1, 1),              
00112                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>(1, 1, -1)               
00113         };
00114 
00115 
00116         <font class="keyword">static</font> <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> uDir[] = 
00117         { 
00118                 - <a class="code" href="classNLMISC_1_1CVector.html#p3">NLMISC::CVector::K</a>,           
00119                 <a class="code" href="classNLMISC_1_1CVector.html#p3">NLMISC::CVector::K</a>,                     
00120                 <a class="code" href="classNLMISC_1_1CVector.html#p1">NLMISC::CVector::I</a>,                     
00121                 <a class="code" href="classNLMISC_1_1CVector.html#p1">NLMISC::CVector::I</a>,                     
00122                 <a class="code" href="classNLMISC_1_1CVector.html#p1">NLMISC::CVector::I</a>,                     
00123                 -<a class="code" href="classNLMISC_1_1CVector.html#p1">NLMISC::CVector::I</a>,                    
00124         };
00125 
00126         <font class="keyword">static</font> <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> vDir[] = 
00127         { 
00128                 - <a class="code" href="classNLMISC_1_1CVector.html#p2">NLMISC::CVector::J</a>,           
00129                 - <a class="code" href="classNLMISC_1_1CVector.html#p2">NLMISC::CVector::J</a>,           
00130                 <a class="code" href="classNLMISC_1_1CVector.html#p3">NLMISC::CVector::K</a>,                     
00131                 - <a class="code" href="classNLMISC_1_1CVector.html#p3">NLMISC::CVector::K</a>,           
00132                 - <a class="code" href="classNLMISC_1_1CVector.html#p2">NLMISC::CVector::J</a>,           
00133                 - <a class="code" href="classNLMISC_1_1CVector.html#p2">NLMISC::CVector::J</a>,           
00134         };
00135         
00136 
00137 
00138         uint k;
00139 
00141         <font class="keywordflow">for</font> (k = 0;  k &lt; 6; ++k)
00142         {                               
00143                 faces[k].reset(<font class="keyword">new</font> CTextureMem);
00144                 uint8 *map = luminanceOnly ?    <a class="code" href="namespaceNL3D.html#a320">BuildCubeMapTexLuminance</a>(start[k], uDir[k], vDir[k], mapSize, f)
00145                                                            :    <a class="code" href="namespaceNL3D.html#a319">BuildCubeMapTex</a>(start[k], uDir[k], vDir[k], mapSize, f);                                
00146                 faces[k]-&gt;setPointer(map,
00147                                                          mapSize * mapSize * <font class="keyword">sizeof</font>(uint8) * (luminanceOnly ? 1 : 4),
00148                                                          <font class="keyword">true</font>,
00149                                                          <font class="keyword">false</font>,
00150                                                          mapSize,
00151                                                          mapSize,
00152                                                          luminanceOnly ? CBitmap::Luminance : CBitmap::RGBA
00153                                                         );
00154                 <font class="keywordflow">if</font> (!shareName.empty())
00155                 {
00156                         faces[k]-&gt;setShareName(shareName + (<font class="keywordtype">char</font>) (<font class="charliteral">'0'</font> + k));
00157                 }
00158         }
00159                 
00160         <font class="keyword">static</font> <font class="keyword">const</font> CTextureCube::TFace toTC[] = { CTextureCube::positive_x, CTextureCube::negative_x,
00161                                                                                                 CTextureCube::positive_z, CTextureCube::negative_z,
00162                                                                                                 CTextureCube::negative_y, CTextureCube::positive_y };
00164         <font class="keywordflow">for</font> (k = 0;  k &lt; 6; ++k)
00165         {
00166                 cubeMap-&gt;setTexture(toTC[k], faces[k].release());       
00167         }
00168 
00169         cubeMap-&gt;setNoFlip(); <font class="comment">// keep faces texture as it</font>
00170 
00171         <font class="keywordflow">return</font> cubeMap.release();
00172 }
00173 
00174 
00175 
00176 
00177 
00178 
00179 
00180 } <font class="comment">// NL3D</font>
00181  
00182  
</pre></div>

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