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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 &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<CPatch*>(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<<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 &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 &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 &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) & 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&1)==0 )
00074 {
00075 scX= 1;
00076
00077 <font class="comment">// Manage difference of Order at the edge.</font>
00078 scY= (float)paNeighbor->getOrderForEdge(edgeNeighbor) / (float)patchCenter->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>>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->getOrderForEdge(edgeNeighbor) / (float)patchCenter->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>>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->getOrderS();
00124 <font class="keywordtype">float</font> ocT= patchCenter->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>>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->getOrderS();
00144 <font class="keywordtype">float</font> onT= paNeighbor->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 &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>->getOrderS();
00184 uint ot= <a class="code" href="classNL3D_1_1CPatchUVLocator.html#o0">_CenterPatch</a>->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 &uvIn, uint patch, CPatch *&patchOut, CVector2f &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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