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<hr><h1>patchuv_locator.cpp</h1><a href="patchuv__locator_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="patchuv__locator_8h.html">3d/patchuv_locator.h</a>"</font>
00029 
00030 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00032 
00033 <font class="keyword">namespace </font>NL3D 
00034 {
00035 
00036 
00037 <font class="comment">// ***************************************************************************</font>
<a name="l00038"></a><a class="code" href="classNL3D_1_1CPatchUVLocator.html#a0">00038</a> <font class="keywordtype">void</font>    CPatchUVLocator::build(<font class="keyword">const</font> CPatch *patchCenter, sint edgeCenter, CPatch::CBindInfo    &amp;bindInfo)
00039 {
00040         <a class="code" href="debug_8h.html#a6">nlassert</a>(bindInfo.Zone);
00041         <font class="comment">// copy basic. NB: NPatchs==0 means patchCenter is binded on a 1/X patch.</font>
00042         <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o0">_CenterPatch</a>= const_cast&lt;CPatch*&gt;(patchCenter);
00043         <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o1">_CenterPatchEdge</a>= edgeCenter;
00044         <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>= bindInfo.NPatchs;
00045 
00046 
00047         <font class="comment">// set it to true. false-d if one of the neighbor patch does not have same number of tile.</font>
00048         <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o5">_SameEdgeOrder</a>= <font class="keyword">true</font>;
00049 
00050 
00051         <font class="comment">// For all patchs binded to me.</font>
00052         <font class="keywordflow">for</font>(sint i=0; i&lt;<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>; i++)
00053         {
00054                 <font class="comment">// The edge of the neihbor on which we are binded.</font>
00055                 sint    edgeNeighbor= bindInfo.Edge[i];
00056                 CPatch  *paNeighbor= bindInfo.Next[i];
00057                 <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o3">_NeighborPatch</a>[i]= paNeighbor;
00058 
00059 
00060                 <font class="comment">// Find uvI, uvJ, uvP such that: </font>
00061                 <font class="comment">// uvOut= uvIn.x * uvI + uvIn.y * uvJ + uvP.</font>
00062                 CVector2f               &amp;uvI= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o4">_NeighborBasis</a>[i].<a class="code" href="structNL3D_1_1CPatchUVLocator_1_1CUVBasis.html#m0">UvI</a>;
00063                 CVector2f               &amp;uvJ= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o4">_NeighborBasis</a>[i].<a class="code" href="structNL3D_1_1CPatchUVLocator_1_1CUVBasis.html#m1">UvJ</a>;
00064                 CVector2f               &amp;uvP= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o4">_NeighborBasis</a>[i].<a class="code" href="structNL3D_1_1CPatchUVLocator_1_1CUVBasis.html#m2">UvP</a>;
00065 
00066 
00067                 <font class="comment">// Find the basis MeToNeighbor.</font>
00068                 <font class="comment">//=============================</font>
00069                 sint    rotation= (edgeCenter - edgeNeighbor + 4) &amp; 3;
00070                 <font class="comment">// Find scale to apply.</font>
00071                 <font class="keywordtype">float</font>   scX, scY;
00072                 <font class="comment">// If our neighbor edge is a vertical edge</font>
00073                 <font class="keywordflow">if</font>( (edgeNeighbor&amp;1)==0 )
00074                 {
00075                         scX= 1;
00076 
00077                         <font class="comment">// Manage difference of Order at the edge.</font>
00078                         scY= (float)paNeighbor-&gt;getOrderForEdge(edgeNeighbor) / (float)patchCenter-&gt;getOrderForEdge(edgeCenter);
00079                         <font class="comment">// Manage bind on the edge.</font>
00080                         <font class="comment">// If patchCenter is binded on a bigger</font>
00081                         <font class="keywordflow">if</font>(bindInfo.MultipleBindNum!=0)
00082                                 scY/= bindInfo.MultipleBindNum;
00083                         <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>&gt;1)
00084                                 scY*= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>;
00085                         <font class="comment">// same TileOrder on the edge??</font>
00086                         <font class="keywordflow">if</font>(scY!=1)
00087                                 <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o5">_SameEdgeOrder</a>= <font class="keyword">false</font>;
00088                 }
00089                 <font class="keywordflow">else</font>
00090                 {
00091                         scY= 1;
00092 
00093                         <font class="comment">// Manage difference of Order at the edge.</font>
00094                         scX= (float)paNeighbor-&gt;getOrderForEdge(edgeNeighbor) / (float)patchCenter-&gt;getOrderForEdge(edgeCenter);
00095                         <font class="comment">// Manage bind on the edge.</font>
00096                         <font class="comment">// If patchCenter is binded on a bigger</font>
00097                         <font class="keywordflow">if</font>(bindInfo.MultipleBindNum!=0)
00098                                 scX/= bindInfo.MultipleBindNum;
00099                         <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>&gt;1)
00100                                 scX*= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>;
00101                         <font class="comment">// same TileOrder on the edge??</font>
00102                         <font class="keywordflow">if</font>(scX!=1)
00103                                 <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o5">_SameEdgeOrder</a>= <font class="keyword">false</font>;
00104                 }
00105                 <font class="comment">// Find rotation to apply.</font>
00106                 <font class="keywordflow">switch</font>(rotation)
00107                 {
00108                 <font class="keywordflow">case</font> 0: uvI.set(-scX, 0); uvJ.set(0, -scY);     <font class="keywordflow">break</font>;
00109                 <font class="keywordflow">case</font> 1: uvI.set(0, -scY); uvJ.set(scX, 0);      <font class="keywordflow">break</font>;
00110                 <font class="keywordflow">case</font> 2: uvI.set(scX, 0); uvJ.set(0, scY);       <font class="keywordflow">break</font>;
00111                 <font class="keywordflow">case</font> 3: uvI.set(0, scY); uvJ.set(-scX, 0);      <font class="keywordflow">break</font>;
00112                 }
00113 
00114 
00115                 <font class="comment">// Find the position.</font>
00116                 <font class="comment">//=============================</font>
00117                 <font class="comment">// Find the uv coord at start of the edge, for 2 patchs.</font>
00118                 CVector2f               uvCenter;
00119                 CVector2f               uvNeighbor;
00120                 <font class="keywordtype">float</font>   decal;
00121 
00122                 <font class="comment">// find the uv at start of edgeCenter, + decal due to bind 1/X.</font>
00123                 <font class="keywordtype">float</font>   ocS= patchCenter-&gt;getOrderS();
00124                 <font class="keywordtype">float</font>   ocT= patchCenter-&gt;getOrderT();
00125                 <font class="comment">// Manage Bind 1/X.</font>
00126                 <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>&gt;1)
00127                 {
00128                         <font class="comment">// Move uvCenter, so it is near the position at start of edgeNeighbor.</font>
00129                         decal= (float)i / <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>;
00130                 }
00131                 <font class="keywordflow">else</font>
00132                         decal= 0;
00133                 <font class="comment">// Manage rotation.</font>
00134                 <font class="keywordflow">switch</font>(edgeCenter)
00135                 {
00136                 <font class="keywordflow">case</font> 0: uvCenter.set(0, decal*ocT);             <font class="keywordflow">break</font>;
00137                 <font class="keywordflow">case</font> 1: uvCenter.set(decal*ocS, ocT);   <font class="keywordflow">break</font>;
00138                 <font class="keywordflow">case</font> 2: uvCenter.set(ocS, (1-decal)*ocT);       <font class="keywordflow">break</font>;
00139                 <font class="keywordflow">case</font> 3: uvCenter.set((1-decal)*ocS, 0); <font class="keywordflow">break</font>;
00140                 };
00141 
00142                 <font class="comment">// find the uv at start of edgeNeighbor, + decal due to bind X/1.</font>
00143                 <font class="keywordtype">float</font>   onS= paNeighbor-&gt;getOrderS();
00144                 <font class="keywordtype">float</font>   onT= paNeighbor-&gt;getOrderT();
00145                 <font class="comment">// Manage Bind X/1.</font>
00146                 <font class="keywordflow">if</font>(bindInfo.MultipleBindNum!=0)
00147                 {
00148                         <font class="comment">// Must invert the id, because of mirror.... (make a draw).</font>
00149                         sint    <a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a>= (bindInfo.MultipleBindNum-1) - bindInfo.MultipleBindId;
00150                         <font class="comment">// Move uvNeighbor, so it is near the position at start of edgeCenter.</font>
00151                         decal= (float)<a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a> / bindInfo.MultipleBindNum;
00152                 }
00153                 <font class="keywordflow">else</font>
00154                         decal= 0;
00155                 <font class="comment">// Manage rotation.</font>
00156                 <font class="keywordflow">switch</font>(edgeNeighbor)
00157                 {
00158                 <font class="keywordflow">case</font> 0: uvNeighbor.set(0, (1-decal)*onT);               <font class="keywordflow">break</font>;
00159                 <font class="keywordflow">case</font> 1: uvNeighbor.set((1-decal)*onS, onT);     <font class="keywordflow">break</font>;
00160                 <font class="keywordflow">case</font> 2: uvNeighbor.set(onS, decal*onT);         <font class="keywordflow">break</font>;
00161                 <font class="keywordflow">case</font> 3: uvNeighbor.set(decal*onS, 0);           <font class="keywordflow">break</font>;
00162                 };
00163 
00164 
00165 
00166                 <font class="comment">// uvOut= uvIn.x * uvI + uvIn.y * uvJ + uvP.</font>
00167                 <font class="comment">// So uvP  = uvOut - uvIn.x * uvI - uvIn.y * uvJ</font>
00168                 uvP= uvNeighbor - uvCenter.x * uvI - uvCenter.y * uvJ;
00169 
00170         }
00171 }
00172 
00173 
00174 <font class="comment">// ***************************************************************************</font>
<a name="l00175"></a><a class="code" href="classNL3D_1_1CPatchUVLocator.html#a1">00175</a> uint    CPatchUVLocator::selectPatch(<font class="keyword">const</font> CVector2f &amp;uvIn)
00176 {
00177         <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>==1)
00178                 <font class="keywordflow">return</font> 0;
00179         <font class="keywordflow">else</font>
00180         {
00181                 <font class="comment">// Choice before on which patch we must go.</font>
00182                 <font class="keywordtype">float</font>   selection=0.0;
00183                 uint    os= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o0">_CenterPatch</a>-&gt;getOrderS();
00184                 uint    ot= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o0">_CenterPatch</a>-&gt;getOrderT();
00185                 <font class="keywordflow">switch</font>(_CenterPatchEdge)
00186                 {
00187                 <font class="keywordflow">case</font> 0: selection= uvIn.y / ot; <font class="keywordflow">break</font>;
00188                 <font class="keywordflow">case</font> 1: selection= uvIn.x / os; <font class="keywordflow">break</font>;
00189                 <font class="keywordflow">case</font> 2: selection= (ot-uvIn.y) / ot; <font class="keywordflow">break</font>;
00190                 <font class="keywordflow">case</font> 3: selection= (os-uvIn.x) / os; <font class="keywordflow">break</font>;
00191                 }
00192 
00193                 sint    sel= (sint)floor(selection*<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>);
00194                 <a class="code" href="namespaceNLMISC.html#a215">clamp</a>(sel, 0, <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>-1);
00195 
00196                 <font class="keywordflow">return</font> sel;
00197         }
00198 }
00199 
00200 
00201 <font class="comment">// ***************************************************************************</font>
<a name="l00202"></a><a class="code" href="classNL3D_1_1CPatchUVLocator.html#a2">00202</a> <font class="keywordtype">void</font>    CPatchUVLocator::locateUV(<font class="keyword">const</font> CVector2f &amp;uvIn, uint patch, CPatch *&amp;patchOut, CVector2f &amp;uvOut)
00203 {
00204         <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CPatchUVLocator.html#o2">_NPatchs</a>==1)
00205         {
00206                 <font class="comment">// Change basis and select good patch.</font>
00207                 <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o4">_NeighborBasis</a>[0].<a class="code" href="structNL3D_1_1CPatchUVLocator_1_1CUVBasis.html#a0">mulPoint</a>(uvIn, uvOut);
00208                 patchOut= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o3">_NeighborPatch</a>[0];
00209         }
00210         <font class="keywordflow">else</font>
00211         {
00212                 <font class="comment">// Change basis and select good patch.</font>
00213                 <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o4">_NeighborBasis</a>[patch].<a class="code" href="structNL3D_1_1CPatchUVLocator_1_1CUVBasis.html#a0">mulPoint</a>(uvIn, uvOut);
00214                 patchOut= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o3">_NeighborPatch</a>[patch];
00215         }
00216 }
00217 
00218 
00219 
00220 } <font class="comment">// NL3D</font>
</pre></div>

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