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<hr><h1>landscape_vegetable_block.cpp</h1><a href="landscape__vegetable__block_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="landscape__vegetable__block_8h.html">3d/landscape_vegetable_block.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="vegetable__manager_8h.html">3d/vegetable_manager.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="vegetable__clip__block_8h.html">3d/vegetable_clip_block.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="vegetable__instance__group_8h.html">3d/vegetable_instance_group.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="patch_8h.html">3d/patch.h</a>"</font>
00033 <font class="preprocessor">#include "<a class="code" href="bezier__patch_8h.html">3d/bezier_patch.h</a>"</font>
00034 
00035 
00036 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00037 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00038 
00039 
00040 <font class="keyword">namespace </font>NL3D 
00041 {
00042 
00043 
00044 <font class="comment">// ***************************************************************************</font>
00045 <font class="comment">/*</font>
00046 <font class="comment">        Distances type squared.</font>
00047 <font class="comment">*/</font>
<a name="l00048"></a><a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html">00048</a> <font class="keyword">class   </font>CLVBSqrDistLUT
00049 {
00050 <font class="keyword">public</font>:
00051         <font class="keyword">static</font>  <font class="keywordtype">float</font>           <a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#p0">Array</a>[<a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>+1];
00052 
<a name="l00053"></a><a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#a0">00053</a>         <a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#a0">CLVBSqrDistLUT</a>()
00054         {
00055                 <font class="comment">// 0, 10, 20, 30, 40, 50</font>
00056                 <font class="keywordflow">for</font>(uint i=0;i&lt;<a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>+1;i++)
00057                 {
00058                         <a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#p0">Array</a>[i]= i*<a class="code" href="vegetable__def_8h.html#a8">NL3D_VEGETABLE_BLOCK_ELTDIST</a>;
00059                         <a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#p0">Array</a>[i]= <a class="code" href="namespaceNLMISC.html#a214">sqr</a>(<a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#p0">Array</a>[i]);
00060                 }
00061         }
00062 
00063 };
00064 
00065 
00066 CLVBSqrDistLUT  <a class="code" href="namespaceNL3D.html#a85">NL3D_InitSqrDistLUT</a>;
<a name="l00067"></a><a class="code" href="classNL3D_1_1CLVBSqrDistLUT.html#p0">00067</a> <font class="keywordtype">float</font>           CLVBSqrDistLUT::Array[<a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>+1];
00068 
00069 
00070 <font class="comment">// ***************************************************************************</font>
<a name="l00071"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#a0">00071</a> CLandscapeVegetableBlock::CLandscapeVegetableBlock()
00072 {
00073         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o1">_VegetableClipBlock</a>= NULL;
00074         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>= <a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>;
00075 
00076         <font class="keywordflow">for</font>(uint j=0;j&lt;<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>;j++)
00077         {
00078                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[j]= NULL;
00079                 <font class="keywordflow">for</font>(uint i=0;i&lt;<a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>;i++)
00080                 {
00081                         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i]= NULL;
00082                 }
00083         }
00084 }
00085 
00086 
00087 
00088 <font class="comment">// ***************************************************************************</font>
<a name="l00089"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#a1">00089</a> <font class="keywordtype">void</font>                    CLandscapeVegetableBlock::init(<font class="keyword">const</font> CVector &amp;center, CVegetableManager *vegetManager, 
00090         CVegetableClipBlock *vegetableClipBlock, CPatch *patch, uint ts, uint tt, CTessList&lt;CLandscapeVegetableBlock&gt; &amp;vblist)
00091 {
00092         <a class="code" href="debug_8h.html#a6">nlassert</a>(patch);
00093         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o0">_Center</a>= center;
00094         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o1">_VegetableClipBlock</a>= vegetableClipBlock;
00095         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o2">_Patch</a>= patch;
00096         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>= ts;
00097         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>= tt;
00098 
00099         <font class="comment">// Create the Vegetable SortBlocks</font>
00100         sint    tms,tmt;
00101         <font class="comment">// for all tiles</font>
00102         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>==4);
00103         <font class="keywordflow">for</font>(tmt= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>; tmt&lt;<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>+2; tmt++)
00104         {
00105                 <font class="keywordflow">for</font>(tms= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>; tms&lt;<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>+2; tms++)
00106                 {
00107                         <font class="comment">// compute approximate center of the tile.</font>
00108                         <font class="keywordtype">float</font>   <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>= (tms + 0.5f) / <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o2">_Patch</a>-&gt;getOrderS();
00109                         <font class="keywordtype">float</font>   <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= (tmt + 0.5f) / <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o2">_Patch</a>-&gt;getOrderT();
00110                         CBezierPatch    *bpatch= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o2">_Patch</a>-&gt;unpackIntoCache();
00111                         CVector center= bpatch-&gt;eval(<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>);
00112 
00113                         <font class="comment">// create the sortBlock. NB: very approximate SortBlock radius....</font>
00114                         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[(tmt-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>)*2 + (tms-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>)]= vegetManager-&gt;createSortBlock(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o1">_VegetableClipBlock</a>, center, <a class="code" href="landscape__def_8h.html#a12">NL3D_PATCH_TILE_RADIUS</a>);
00115                 }
00116         }
00117 
00118         <font class="comment">// append to list.</font>
00119         vblist.append(<font class="keyword">this</font>);
00120 }
00121 
00122 
00123 <font class="comment">// ***************************************************************************</font>
<a name="l00124"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#a2">00124</a> <font class="keywordtype">void</font>                    CLandscapeVegetableBlock::release(CVegetableManager *vegeManager, CTessList&lt;CLandscapeVegetableBlock&gt; &amp;vblist)
00125 {
00126         <font class="comment">// release all Igs, and all Sbs.</font>
00127         <font class="keywordflow">for</font>(uint j=0;j&lt;<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>;j++)
00128         {
00129                 <font class="comment">// release IGs first.</font>
00130                 <font class="keywordflow">for</font>(uint i=0;i&lt;<a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>;i++)
00131                 {
00132                         <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i])
00133                         {
00134                                 vegeManager-&gt;deleteIg(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i]);
00135                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i]= NULL;
00136                         }
00137                 }
00138 
00139                 <font class="comment">// release SB</font>
00140                 <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[j])
00141                 {
00142                         vegeManager-&gt;deleteSortBlock(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[j]);
00143                         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[j]= NULL;
00144                 }
00145         }
00146 
00147         <font class="comment">// reset state.</font>
00148         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>= <a class="code" href="vegetable__def_8h.html#a7">NL3D_VEGETABLE_BLOCK_NUMDIST</a>;
00149 
00150         <font class="comment">// remove from list.</font>
00151         vblist.remove(<font class="keyword">this</font>);
00152 }
00153 
00154 <font class="comment">// ***************************************************************************</font>
<a name="l00155"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#a3">00155</a> <font class="keywordtype">void</font>                    CLandscapeVegetableBlock::update(<font class="keyword">const</font> CVector &amp;viewCenter, CVegetableManager *vegeManager)
00156 {
00157         <font class="keywordtype">float</font>   sqrDist= (viewCenter-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o0">_Center</a>).sqrnorm();
00158 
00159         <font class="comment">// compute new distance type. Incremental mode.</font>
00160         uint    newDistType= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>;
00161         <font class="keywordflow">while</font>(sqrDist&lt;CLVBSqrDistLUT::Array[newDistType])
00162         {
00163                 newDistType--;
00164         }
00165         <font class="keywordflow">while</font>(newDistType&lt;NL3D_VEGETABLE_BLOCK_NUMDIST &amp;&amp; sqrDist&gt;CLVBSqrDistLUT::Array[newDistType+1])
00166         {
00167                 newDistType++;
00168         }
00169         <font class="comment">/*</font>
00170 <font class="comment">                NB: to test but may be better than </font>
00171 <font class="comment">                        newDistType= floor()(delta.norm() / NL3D_VEGETABLE_BLOCK_ELTDIST);</font>
00172 <font class="comment">        */</font>
00173 
00174 
00175         <font class="comment">// Change of distance type??</font>
00176         <font class="keywordflow">if</font>(newDistType!=<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>)
00177         {
00178                 <font class="comment">// Erase or create IGs.</font>
00179                 <font class="keywordflow">if</font>(newDistType&gt;<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>)
00180                 {
00181                         <font class="comment">// For all tiles</font>
00182                         <font class="keywordflow">for</font>(uint j=0;j&lt;<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>;j++)
00183                         {
00184                                 <font class="comment">// Erase no more needed Igs.</font>
00185                                 <font class="keywordflow">for</font>(uint i=<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>; i&lt;newDistType; i++)
00186                                 {
00187                                         <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i])
00188                                         {
00189                                                 vegeManager-&gt;deleteIg(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i]);
00190                                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[j][i]= NULL;
00191                                         }
00192                                 }
00193 
00194                                 <font class="comment">// update the sort block for this tile</font>
00195                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[j]-&gt;updateSortBlock(*vegeManager);
00196                         }
00197                 }
00198                 <font class="keywordflow">else</font>
00199                 {
00200                         <font class="comment">// Create a context for creation.</font>
00201                         CLandscapeVegetableBlockCreateContext   ctx;
00202                         ctx.init(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o2">_Patch</a>, <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>, <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>);
00203 
00204                         <font class="comment">// create new Igs, for all tiles</font>
00205                         <font class="keywordflow">for</font>(uint i=newDistType; i&lt;<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>; i++)
00206                         {
00207                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#c0">createVegetableIGForDistType</a>(i, vegeManager, ctx);
00208                         }
00209 
00210                         <font class="comment">// For all tiles</font>
00211                         <font class="keywordflow">for</font>(uint j=0;j&lt;<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>;j++)
00212                         {
00213                                 <font class="comment">// update the sort block for this tile</font>
00214                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[j]-&gt;updateSortBlock(*vegeManager);
00215                         }
00216                 }
00217 
00218                 <font class="comment">// copy new dist type.</font>
00219                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o5">_CurDistType</a>= newDistType;
00220         }
00221 
00222 
00223 }
00224 
00225 
00226 <font class="comment">// ***************************************************************************</font>
<a name="l00227"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#c0">00227</a> <font class="keywordtype">void</font>                    CLandscapeVegetableBlock::createVegetableIGForDistType(uint i, CVegetableManager *vegeManager,
00228         CLandscapeVegetableBlockCreateContext &amp;vbCreateCtx)
00229 {
00230         <font class="comment">// check</font>
00231         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>==4);
00232         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[0][i]==NULL);
00233         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[1][i]==NULL);
00234         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[2][i]==NULL);
00235         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[3][i]==NULL);
00236 
00237         <font class="comment">// Create vegetables instances per tile_material.</font>
00238         sint    tms,tmt;
00239         <font class="comment">// for all tiles</font>
00240         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>==4);
00241         <font class="keywordflow">for</font>(tmt= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>; tmt&lt;<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>+2; tmt++)
00242         {
00243                 <font class="keywordflow">for</font>(tms= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>; tms&lt;<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a>+2; tms++)
00244                 {
00245                         uint    tileId= tms-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o3">_Ts</a> + (tmt-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o4">_Tt</a>)*2;
00246 
00247                         <font class="comment">// create the instance group in the good sortBlock</font>
00248                         CVegetableInstanceGroup         *vegetIg= vegeManager-&gt;createIg(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o6">_VegetableSortBlock</a>[tileId]);
00249                         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[tileId][i]= vegetIg;
00250 
00251                         <font class="comment">// generate </font>
00252                         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o2">_Patch</a>-&gt;generateTileVegetable(vegetIg, i, tms, tmt, vbCreateCtx);
00253 
00254                         <font class="comment">// If the ig is empty, delete him. This optimize rendering because no unusefull ig are </font>
00255                         <font class="comment">// tested for rendering. This speed up some 1/10 of ms...</font>
00256                         <font class="keywordflow">if</font>(vegetIg-&gt;isEmpty())
00257                         {
00258                                 vegeManager-&gt;deleteIg(vegetIg);
00259                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlock.html#o7">_VegetableIG</a>[tileId][i]= NULL;
00260                         }
00261 
00262                         <font class="comment">// NB: vegtable SortBlock is updated in CLandscapeVegetableBlock::update() after</font>
00263                 }
00264         }
00265 
00266 }
00267 
00268 
00269 <font class="comment">// ***************************************************************************</font>
00270 <font class="comment">// ***************************************************************************</font>
00271 <font class="comment">// CLandscapeVegetableIGCreateContext</font>
00272 <font class="comment">// ***************************************************************************</font>
00273 <font class="comment">// ***************************************************************************</font>
00274 
00275 
00276 <font class="comment">// ***************************************************************************</font>
<a name="l00277"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#a0">00277</a> CLandscapeVegetableBlockCreateContext::CLandscapeVegetableBlockCreateContext()
00278 {
00279         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o1">_Patch</a>= NULL;
00280 }
00281 
00282 
00283 <font class="comment">// ***************************************************************************</font>
<a name="l00284"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#a1">00284</a> <font class="keywordtype">void</font>                    CLandscapeVegetableBlockCreateContext::init(CPatch *patch, uint ts, uint tt)
00285 {
00286         <a class="code" href="debug_8h.html#a6">nlassert</a>(patch);
00287         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o0">_Empty</a>= <font class="keyword">true</font>;
00288         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o1">_Patch</a>= patch;
00289         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o2">_Ts</a>= ts;
00290         <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o3">_Tt</a>= tt;
00291 }
00292 
00293 
00294 <font class="comment">// ***************************************************************************</font>
<a name="l00295"></a><a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#a2">00295</a> <font class="keywordtype">void</font>                    CLandscapeVegetableBlockCreateContext::eval(uint ts, uint tt, <font class="keywordtype">float</font> <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <font class="keywordtype">float</font> <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, CVector &amp;pos)
00296 {
00297         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="tess__block_8h.html#a1">NL3D_TESSBLOCK_TILESIZE</a>==4);
00298 
00299         <font class="comment">// If never created, do it now</font>
00300         <font class="comment">// ==================</font>
00301         <font class="keywordflow">if</font>(_Empty)
00302         {
00303                 <font class="comment">// Eval Position and normals for the 9 vertices (around the 2x2 tiles)</font>
00304                 <font class="keywordflow">for</font>(uint j=0; j&lt;3;j++)
00305                 {
00306                         <font class="keywordtype">float</font>   <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>= (float)(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o3">_Tt</a>+j)/<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o1">_Patch</a>-&gt;getOrderT();
00307                         <font class="keywordflow">for</font>(uint i=0; i&lt;3;i++)
00308                         {
00309                                 <font class="keywordtype">float</font>   <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>= (float)(<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o2">_Ts</a>+i)/<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o1">_Patch</a>-&gt;getOrderS();
00310                                 <font class="comment">// eval position.</font>
00311                                 <font class="comment">// use computeVertex() and not bpatch-&gt;eval() because vegetables must follow the </font>
00312                                 <font class="comment">// noise (at least at tile precision...). It is slower but necessary.</font>
00313                                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o4">_Pos</a>[j*3+i]= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o1">_Patch</a>-&gt;computeVertex(<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>);
00314                         }
00315                 }
00316 
00317                 <font class="comment">// Ok, it's done</font>
00318                 <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o0">_Empty</a>= <font class="keyword">false</font>;
00319         }
00320 
00321 
00322         <font class="comment">// Eval, with simple bilinear</font>
00323         <font class="comment">// ==================</font>
00324         <a class="code" href="debug_8h.html#a6">nlassert</a>(ts==<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o2">_Ts</a> || ts==<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o2">_Ts</a>+1);
00325         <a class="code" href="debug_8h.html#a6">nlassert</a>(tt==<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o3">_Tt</a> || tt==<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o3">_Tt</a>+1);
00326         uint    ds= ts-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o2">_Ts</a>;
00327         uint    dt= tt-<a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o3">_Tt</a>;
00328         <font class="comment">// Indices.</font>
00329         uint    v00= dt*3 + ds;
00330         uint    v10= v00 + 1;
00331         uint    v01= v00 + 3;
00332         uint    v11= v00 + 4;
00333         <font class="comment">// BiLinearFactor.</font>
00334         <font class="keywordtype">float</font>   dxdy= (1-<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>)*(1-<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>);
00335         <font class="keywordtype">float</font>   dx2dy= <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>*(1-<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>);
00336         <font class="keywordtype">float</font>   dxdy2= (1-<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>;
00337         <font class="keywordtype">float</font>   dx2dy2= <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>;
00338 
00339         <font class="comment">// Compute Pos.</font>
00340         pos = <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o4">_Pos</a>[v00] * dxdy;
00341         pos+= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o4">_Pos</a>[v10] * dx2dy;
00342         pos+= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o4">_Pos</a>[v01] * dxdy2;
00343         pos+= <a class="code" href="classNL3D_1_1CLandscapeVegetableBlockCreateContext.html#o4">_Pos</a>[v11] * dx2dy2;
00344 }
00345 
00346 
00347 } <font class="comment">// NL3D</font>
</pre></div>

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