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<hr><h1>chain_quad.cpp</h1><a href="chain__quad_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="stdpacs_8h.html">stdpacs.h</a>"</font>
00027
00028 <font class="preprocessor">#include "<a class="code" href="chain__quad_8h.html">pacs/chain_quad.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
00034 <font class="keyword">namespace </font>NLPACS
00035 {
00036
00037
00038 <font class="comment">// ***************************************************************************</font>
<a name="l00039"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#r0">00039</a> <font class="keyword">const</font> <font class="keywordtype">float</font> CChainQuad::_QuadElementSize= 4; <font class="comment">// = 4 meters.</font>
00040
00041
00042 <font class="comment">// ***************************************************************************</font>
<a name="l00043"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a0">00043</a> CChainQuad::CChainQuad()
00044 {
00045 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= NULL;
00046 <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>= 0;
00047 }
00048 <font class="comment">// ***************************************************************************</font>
<a name="l00049"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a2">00049</a> CChainQuad::~CChainQuad()
00050 {
00051 <font class="keyword">delete</font> [] <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>;
00052 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= NULL;
00053 <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>= 0;
00054 }
00055 <font class="comment">// ***************************************************************************</font>
<a name="l00056"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a1">00056</a> CChainQuad::CChainQuad(<font class="keyword">const</font> CChainQuad &o)
00057 {
00058 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= NULL;
00059 <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>= 0;
00060 *<font class="keyword">this</font>= o;
00061 }
00062 <font class="comment">// ***************************************************************************</font>
<a name="l00063"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a3">00063</a> CChainQuad &CChainQuad::operator=(<font class="keyword">const</font> CChainQuad &o)
00064 {
00065 <font class="comment">// Alloc good quaddata.</font>
00066 <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>= o._QuadDataLen;
00067 <font class="keyword">delete</font> [] <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>;
00068 <font class="keywordflow">if</font>(<a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>>0)
00069 {
00070 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= (uint8*)<font class="keyword">new</font> uint8[<a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>];
00071 <font class="comment">// copy contents.</font>
00072 memcpy(<a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>, o._QuadData, <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>);
00073 }
00074 <font class="keywordflow">else</font>
00075 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= NULL;
00076
00077 <font class="comment">// copy infos.</font>
00078 <a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>= o._Width;
00079 <a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>= o._Height;
00080 <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>= o._X;
00081 <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>= o._Y;
00082
00083 <font class="comment">// copy good pointers.</font>
00084 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>.clear();
00085 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>.resize(o._Quad.size(), NULL);
00086 <font class="keywordflow">for</font>(sint i=0; i<(sint)<a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>.size(); i++)
00087 {
00088 <font class="keywordflow">if</font>(o._Quad[i])
00089 {
00090 uint32 off= (uint32)(o._Quad[i]-o._QuadData);
00091 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[i]= <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>+off;
00092 }
00093 }
00094
00095
00096 <font class="keywordflow">return</font> *<font class="keyword">this</font>;
00097 }
00098
00099
00100
00101 <font class="comment">// ***************************************************************************</font>
<a name="l00102"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#c1">00102</a> <font class="keywordtype">void</font> CChainQuad::getGridBounds(sint32 &x0, sint32 &y0, sint32 &x1, sint32 &y1, <font class="keyword">const</font> CVector &minP, <font class="keyword">const</font> CVector &maxP)<font class="keyword"> const</font>
00103 <font class="keyword"></font>{
00104 x0= (sint32)floor(minP.x / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>;
00105 y0= (sint32)floor(minP.y / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>;
00106 x1= (sint32) ceil(maxP.x / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>;
00107 y1= (sint32) ceil(maxP.y / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>;
00108 <font class="comment">// Manage selection of a point exactly on a quad bound</font>
00109 <font class="keywordflow">if</font>(x1-x0==0)
00110 x0--, x1++;
00111 <font class="keywordflow">if</font>(y1-y0==0)
00112 y0--, y1++;
00113 <font class="comment">// clamp</font>
00114 x0= max(x0, (sint32)0);
00115 y0= max(y0, (sint32)0);
00116 x1= <a class="code" href="bit__set_8cpp.html#a0">min</a>(x1, (sint32)<a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>);
00117 y1= <a class="code" href="bit__set_8cpp.html#a0">min</a>(y1, (sint32)<a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>);
00118 }
00119
00120
00121 <font class="comment">// ***************************************************************************</font>
<a name="l00122"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a4">00122</a> <font class="keywordtype">void</font> CChainQuad::build(<font class="keyword">const</font> std::vector<COrderedChain> &ochains)
00123 {
00124 vector< list<CEdgeChainEntry> > tempQuad;
00125 sint i,j;
00126
00127 <font class="comment">// first, clear any pr-build.</font>
00128 <a class="code" href="namespaceNLMISC.html#a222">contReset</a>(<a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>);
00129 <font class="keyword">delete</font> [] <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>;
00130 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= NULL;
00131 <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>= 0;
00132
00133
00134 <font class="comment">// 0. Find BBox of the grid. Allocate grid.</font>
00135 <font class="comment">//=========================================</font>
00136 <font class="keywordtype">bool</font> first=<font class="keyword">true</font>;
00137 CAABBox chainquadBBox;
00138 <font class="comment">// run all chains.</font>
00139 <font class="keywordflow">for</font>(i=0;i<(sint)ochains.size();i++)
00140 {
00141 <font class="keyword">const</font> std::vector<CVector2s> &vertices= ochains[i].getVertices();
00142
00143 <font class="comment">// run all vertices.</font>
00144 <font class="keywordflow">for</font>(j= 0; j<(sint)vertices.size();j++)
00145 {
00146 <font class="comment">// enlarge bbox.</font>
00147 <font class="keywordflow">if</font>(first)
00148 first= <font class="keyword">false</font>, chainquadBBox.setCenter(vertices[j].unpack3f());
00149 <font class="keywordflow">else</font>
00150 chainquadBBox.extend(vertices[j].unpack3f());
00151 }
00152 }
00153
00154 <font class="comment">// compute X,Y,Width, Height.</font>
00155 <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>= (sint32)floor(chainquadBBox.getMin().x / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>);
00156 <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>= (sint32)floor(chainquadBBox.getMin().y / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>);
00157 <a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>= (sint32)ceil(chainquadBBox.getMax().x / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>;
00158 <a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>= (sint32)ceil(chainquadBBox.getMax().y / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>;
00159
00160 tempQuad.resize(<a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>);
00161 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>.resize(<a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>, NULL);
00162
00163
00164 <font class="comment">// 1. For each edge, add them to the quadgrid.</font>
00165 <font class="comment">//=========================================</font>
00166 <font class="comment">// run all chains.</font>
00167 <font class="keywordflow">for</font>(i=0;i<(sint)ochains.size();i++)
00168 {
00169 <font class="keyword">const</font> std::vector<CVector2s> &vertices= ochains[i].getVertices();
00170
00171 sint numEdges= (sint)vertices.size()-1;
00172
00173 <font class="comment">// run all edges.</font>
00174 <font class="keywordflow">for</font>(j= 0; j<numEdges; j++)
00175 {
00176 <font class="keyword">const</font> CVector p0= vertices[j].unpack3f();
00177 <font class="keyword">const</font> CVector p1= vertices[j+1].unpack3f();
00178 CVector minP,maxP;
00179 minP.minof(p0, p1);
00180 maxP.maxof(p0, p1);
00181 <font class="comment">// PrecisionPb: extend a little this edge. This is important for special case like borders on zones.</font>
00182 <font class="keywordflow">if</font>(minP.x-maxP.x==0)
00183 minP.x-=0.001f, maxP.x+=0.001f;
00184 <font class="keywordflow">if</font>(minP.y-maxP.y==0)
00185 minP.y-=0.001f, maxP.y+=0.001f;
00186
00187
00188 <font class="comment">// get bounding coordinate of this edge in the quadgrid.</font>
00189 sint32 x0, y0, x1, y1;
00190 <a class="code" href="classNLPACS_1_1CChainQuad.html#c1">getGridBounds</a>(x0, y0, x1, y1, minP, maxP);
00191
00192 <font class="comment">// add this edge to all the quadnode it touch.</font>
00193 <font class="keywordflow">for</font>(sint <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>= y0; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a><y1; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>++)
00194 {
00195 <font class="keywordflow">for</font>(sint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>= x0; <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a><x1; <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>++)
00196 {
00197 list<CEdgeChainEntry> &quadNode= tempQuad[<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>];
00198
00199 <a class="code" href="classNLPACS_1_1CChainQuad.html#c0">addEdgeToQuadNode</a>(quadNode, i, j);
00200 }
00201 }
00202 }
00203 }
00204
00205
00206 <font class="comment">// 2. Mem optimisation: Use only 1 block for ALL quads of the grid.</font>
00207 <font class="comment">//=========================================</font>
00208 sint memSize= 0;
00209 <font class="comment">// run all quads.</font>
00210 <font class="keywordflow">for</font>(i=0;i<(sint)tempQuad.size();i++)
00211 {
00212 list<CEdgeChainEntry> &quadNode= tempQuad[i];
00213
00214 <font class="keywordflow">if</font>(!quadNode.empty())
00215 {
00216 <font class="comment">// add an entry for Len.</font>
00217 memSize+= <font class="keyword">sizeof</font>(uint16);
00218 <font class="comment">// add N entry of CEdgeChainEntry.</font>
00219 memSize+= quadNode.size()*<font class="keyword">sizeof</font>(CEdgeChainEntry);
00220 }
00221 }
00222
00223 <font class="comment">// allocate.</font>
00224 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= (uint8*)<font class="keyword">new</font> uint8[memSize];
00225 <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>= memSize;
00226
00227
00228 <font class="comment">// 3. Fill _QuadData with lists.</font>
00229 <font class="comment">//=========================================</font>
00230 uint8 *ptr= <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>;
00231 <font class="keywordflow">for</font>(i=0;i<(sint)tempQuad.size();i++)
00232 {
00233 list<CEdgeChainEntry> &srcQuadNode= tempQuad[i];
00234 list<CEdgeChainEntry>::iterator it;
00235
00236 <font class="keywordflow">if</font>(!srcQuadNode.empty())
00237 {
00238 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[i]= ptr;
00239
00240 <font class="comment">// write len.</font>
00241 uint16 len= srcQuadNode.size();
00242 *((uint16*)ptr)= len;
00243 ptr+= <font class="keyword">sizeof</font>(uint16);
00244
00245 <font class="comment">// add entries.</font>
00246 it= srcQuadNode.begin();
00247 <font class="keywordflow">for</font>(j=0; j<len; j++, it++)
00248 {
00249 *((CEdgeChainEntry*)ptr)= *it;
00250 ptr+= <font class="keyword">sizeof</font>(CEdgeChainEntry);
00251 }
00252 }
00253 }
00254
00255
00256 <font class="comment">// End.</font>
00257 }
00258
00259
00260 <font class="comment">// ***************************************************************************</font>
<a name="l00261"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#c0">00261</a> <font class="keywordtype">void</font> CChainQuad::addEdgeToQuadNode(list<CEdgeChainEntry> &quadNode, sint ochainId, sint edgeId)
00262 {
00263 <font class="comment">// 0. try to find, insert an edge in an existing CEdgeChainEntry.</font>
00264 <font class="comment">//=========================================</font>
00265 list<CEdgeChainEntry>::iterator it;
00266 <font class="keywordflow">for</font>(it= quadNode.begin(); it!=quadNode.end();it++)
00267 {
00268 <font class="keywordflow">if</font>(it->OChainId==ochainId)
00269 {
00270 <font class="comment">// selection is faster if we only manages a single start/end block.</font>
00271 it->EdgeStart= <a class="code" href="bit__set_8cpp.html#a0">min</a>(it->EdgeStart, (uint16)edgeId);
00272 it->EdgeEnd= max(it->EdgeEnd, (uint16)(edgeId+1));
00273 <font class="keywordflow">return</font>;
00274 }
00275 }
00276
00277
00278 <font class="comment">// 1. else, create new one.</font>
00279 <font class="comment">//=========================================</font>
00280 CEdgeChainEntry entry;
00281 entry.OChainId= ochainId;
00282 entry.EdgeStart= edgeId;
00283 entry.EdgeEnd= edgeId+1;
00284 quadNode.push_back(entry);
00285 }
00286
00287
00288 <font class="comment">// ***************************************************************************</font>
<a name="l00289"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a5">00289</a> sint CChainQuad::selectEdges(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CAABBox.html">NLMISC::CAABBox</a> &bbox, CCollisionSurfaceTemp &cst)<font class="keyword"> const</font>
00290 <font class="keyword"></font>{
00291 sint nRes=0;
00292 sint i;
00293 uint16 *ochainLUT= cst.OChainLUT;
00294
00295 <font class="comment">// start: no edge found.</font>
00296 cst.EdgeChainEntries.clear();
00297
00298 <font class="comment">// get bounding coordinate of this bbox in the quadgrid.</font>
00299 sint32 x0, y0, x1, y1;
00300 <a class="code" href="classNLPACS_1_1CChainQuad.html#c1">getGridBounds</a>(x0, y0, x1, y1, bbox.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_0">getMin</a>(), bbox.<a class="code" href="classNLMISC_1_1CAABBox.html#z264_1">getMax</a>());
00301
00302
00303 <font class="comment">// run all intersected quads.</font>
00304 <font class="keywordflow">for</font>(sint <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>= y0; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a><y1; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>++)
00305 {
00306 <font class="keywordflow">for</font>(sint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>= x0; <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a><x1; <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>++)
00307 {
00308 uint8 *quadNode= <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>];
00309
00310 <font class="comment">// no edgechain entry??</font>
00311 <font class="keywordflow">if</font>(!quadNode)
00312 <font class="keywordflow">continue</font>;
00313
00314 <font class="comment">// get edgechain entries</font>
00315 sint numEdgeChainEntries= *((uint16*)quadNode);
00316 quadNode+= <font class="keyword">sizeof</font>(uint16);
00317 CEdgeChainEntry *ptrEdgeChainEntry= (CEdgeChainEntry*)quadNode;
00318
00319 <font class="comment">// For each one, add it to the result list.</font>
00320 <font class="keywordflow">for</font>(i=0;i<numEdgeChainEntries;i++)
00321 {
00322 uint16 ochainId= ptrEdgeChainEntry[i].OChainId;
00323
00324 <font class="comment">// if ochain not yet inserted.</font>
00325 <font class="keywordflow">if</font>(ochainLUT[ochainId]==0xFFFF)
00326 {
00327 <font class="comment">// inc the list.</font>
00328 ochainLUT[ochainId]= nRes;
00329 cst.EdgeChainEntries.push_back(ptrEdgeChainEntry[i]);
00330 nRes++;
00331 }
00332 <font class="keywordflow">else</font>
00333 {
00334 <font class="comment">// extend the entry in the list.</font>
00335 uint16 <a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a>= ochainLUT[ochainId];
00336 CEdgeChainEntry &ece= cst.EdgeChainEntries[<a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a>];
00337 ece.EdgeStart= <a class="code" href="bit__set_8cpp.html#a0">min</a>(ece.EdgeStart, ptrEdgeChainEntry[i].EdgeStart);
00338 ece.EdgeEnd= max(ece.EdgeEnd, ptrEdgeChainEntry[i].EdgeEnd);
00339 }
00340 }
00341 }
00342 }
00343
00344
00345 <font class="comment">// reset LUT to 0xFFFF for all ochains selected.</font>
00346 <font class="keywordflow">for</font>(i=0;i<nRes;i++)
00347 {
00348 uint16 ochainId= cst.EdgeChainEntries[i].OChainId;
00349 ochainLUT[ochainId]= 0xFFFF;
00350 }
00351
00352
00353 <font class="keywordflow">return</font> nRes;
00354 }
00355
<a name="l00356"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a6">00356</a> sint CChainQuad::selectEdges(CVector start, CVector end, CCollisionSurfaceTemp &cst)<font class="keyword"> const</font>
00357 <font class="keyword"></font>{
00358 sint nRes=0;
00359 sint i;
00360 uint16 *ochainLUT= cst.OChainLUT;
00361
00362 <font class="comment">// start: no edge found.</font>
00363 cst.EdgeChainEntries.clear();
00364
00365 <font class="keywordflow">if</font> (end.x < start.x)
00366 swap(start, end);
00367
00368 <font class="keywordtype">float</font> minx = <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>,
00369 miny = <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>,
00370 maxx = minx + <a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>,
00371 maxy = miny + <a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>;
00372
00373 <font class="keywordflow">if</font> (start.x > maxx || end.x < minx || start.y > maxy || end.y < miny)
00374 <font class="keywordflow">return</font> nRes;
00375
00376 <font class="keywordflow">if</font> (start.x < minx)
00377 {
00378 start.y = start.y+(end.y-start.y)*(minx-start.x)/(end.x-start.x);
00379 start.x = minx;
00380 }
00381
00382 <font class="keywordflow">if</font> (start.y < miny)
00383 {
00384 start.x = start.x+(end.x-start.x)*(miny-start.y)/(end.y-start.y);
00385 start.y = miny;
00386 }
00387
00388 <font class="keywordflow">if</font> (end.x > maxx)
00389 {
00390 end.y = start.y+(end.y-start.y)*(minx-start.x)/(end.x-start.x);
00391 end.x = maxx;
00392 }
00393
00394 <font class="keywordflow">if</font> (end.y > maxy)
00395 {
00396 end.x = start.x+(end.x-start.x)*(miny-start.y)/(end.y-start.y);
00397 end.y = maxy;
00398 }
00399
00400 sint32 x0, x1, ya, yb;
00401 sint <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>;
00402 <font class="keywordtype">float</font> fx, fxa, fxb, fya, fyb;
00403
00404 x0 = (sint32)floor(start.x / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>;
00405 x1 = (sint32)ceil(end.x / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>;
00406 fx = (x0+<a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>)*<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>;
00407
00408 <font class="keywordflow">for</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>=x0; <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a><x1; ++<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>)
00409 {
00410 fxa = (fx < start.x) ? start.x : fx;
00411 fxb = (fx+<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a> > end.x) ? end.x : fx+<a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>;
00412
00413 fya = start.y+(end.y-start.y)*(fxa-start.x)/(end.x-start.x);
00414 fyb = start.y+(end.y-start.y)*(fxb-start.x)/(end.x-start.x);
00415
00416 <font class="keywordflow">if</font> (fya > fyb)
00417 swap (fya, fyb);
00418
00419 ya = (sint32)floor(fya / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>;
00420 yb = (sint32)ceil(fyb / <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>) - <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>;
00421
00422 fx += <a class="code" href="classNLPACS_1_1CChainQuad.html#r0">_QuadElementSize</a>;
00423
00424 <font class="keywordflow">for</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>=ya; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a><yb; ++<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>)
00425 {
00426 uint8 *quadNode= <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>*<a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>];
00427
00428 <font class="comment">// no edgechain entry??</font>
00429 <font class="keywordflow">if</font>(!quadNode)
00430 <font class="keywordflow">continue</font>;
00431
00432 <font class="comment">// get edgechain entries</font>
00433 sint numEdgeChainEntries= *((uint16*)quadNode);
00434 quadNode+= <font class="keyword">sizeof</font>(uint16);
00435 CEdgeChainEntry *ptrEdgeChainEntry= (CEdgeChainEntry*)quadNode;
00436
00437 <font class="comment">// For each one, add it to the result list.</font>
00438 <font class="keywordflow">for</font>(i=0;i<numEdgeChainEntries;i++)
00439 {
00440 uint16 ochainId= ptrEdgeChainEntry[i].OChainId;
00441
00442 <font class="comment">// if ochain not yet inserted.</font>
00443 <font class="keywordflow">if</font>(ochainLUT[ochainId]==0xFFFF)
00444 {
00445 <font class="comment">// inc the list.</font>
00446 ochainLUT[ochainId]= nRes;
00447 cst.EdgeChainEntries.push_back(ptrEdgeChainEntry[i]);
00448 nRes++;
00449 }
00450 <font class="keywordflow">else</font>
00451 {
00452 <font class="comment">// extend the entry in the list.</font>
00453 uint16 <a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a>= ochainLUT[ochainId];
00454 CEdgeChainEntry &ece= cst.EdgeChainEntries[<a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a>];
00455 ece.EdgeStart= <a class="code" href="bit__set_8cpp.html#a0">min</a>(ece.EdgeStart, ptrEdgeChainEntry[i].EdgeStart);
00456 ece.EdgeEnd= max(ece.EdgeEnd, ptrEdgeChainEntry[i].EdgeEnd);
00457 }
00458 }
00459 }
00460 }
00461
00462 <font class="comment">// reset LUT to 0xFFFF for all ochains selected.</font>
00463 <font class="keywordflow">for</font>(i=0;i<nRes;i++)
00464 {
00465 uint16 ochainId= cst.EdgeChainEntries[i].OChainId;
00466 ochainLUT[ochainId]= 0xFFFF;
00467 }
00468
00469 <font class="keywordflow">return</font> nRes;
00470 }
00471
00472 <font class="comment">// ***************************************************************************</font>
<a name="l00473"></a><a class="code" href="classNLPACS_1_1CChainQuad.html#a7">00473</a> <font class="keywordtype">void</font> CChainQuad::serial(<a class="code" href="classNLMISC_1_1IStream.html">NLMISC::IStream</a> &f)
00474 {
00475 <font class="comment">/*</font>
00476 <font class="comment"> Version 0:</font>
00477 <font class="comment"> - base version.</font>
00478 <font class="comment"> */</font>
00479 (void)f.<a class="code" href="classNLMISC_1_1IStream.html#a29">serialVersion</a>(0);
00480 uint i;
00481
00482 <font class="comment">// serial basics.</font>
00483 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(<a class="code" href="classNLPACS_1_1CChainQuad.html#o3">_X</a>, <a class="code" href="classNLPACS_1_1CChainQuad.html#o4">_Y</a>, <a class="code" href="classNLPACS_1_1CChainQuad.html#o1">_Width</a>, <a class="code" href="classNLPACS_1_1CChainQuad.html#o2">_Height</a>, <a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>);
00484
00485
00486 <font class="comment">// serial _QuadData.</font>
00487 <font class="keywordflow">if</font>(f.<a class="code" href="classNLMISC_1_1IStream.html#a4">isReading</a>())
00488 {
00489 <font class="keyword">delete</font> [] <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>;
00490 <font class="keywordflow">if</font>(<a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>>0)
00491 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= (uint8*)<font class="keyword">new</font> uint8[<a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>];
00492 <font class="keywordflow">else</font>
00493 <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>= NULL;
00494 }
00495 <font class="comment">// Since we have only uint16 (see CEdgeChainEntry), serial them in a single block.</font>
00496 uint16 *ptrQData= (uint16*)<a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>;
00497 <font class="keywordflow">for</font>(i=0;i<<a class="code" href="classNLPACS_1_1CChainQuad.html#o6">_QuadDataLen</a>/2; i++, ptrQData++)
00498 {
00499 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(*ptrQData);
00500 }
00501
00502
00503 <font class="comment">// serial _Quad.</font>
00504 std::vector<uint32> offsets;
00505 uint32 len;
00506 uint32 val;
00507 <font class="keywordflow">if</font>(f.<a class="code" href="classNLMISC_1_1IStream.html#a4">isReading</a>())
00508 {
00509 <font class="comment">// len/resize.</font>
00510 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(len);
00511 offsets.resize(len);
00512 <a class="code" href="namespaceNLMISC.html#a222">contReset</a>(<a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>);
00513 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>.resize(len);
00514
00515 <font class="comment">// read offsets -> ptrs.</font>
00516 <font class="keywordflow">for</font>(i=0; i<len; i++)
00517 {
00518 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(val);
00519 <font class="keywordflow">if</font>(val== 0xFFFFFFFF)
00520 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[i]= NULL;
00521 <font class="keywordflow">else</font>
00522 <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[i]= <a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>+val;
00523 }
00524 }
00525 <font class="keywordflow">else</font>
00526 {
00527 <font class="comment">// len/resize.</font>
00528 len= <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>.size();
00529 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(len);
00530
00531 <font class="comment">// write offsets.</font>
00532 <font class="keywordflow">for</font>(i=0; i<len; i++)
00533 {
00534 uint8 *ptr= <a class="code" href="classNLPACS_1_1CChainQuad.html#o0">_Quad</a>[i];
00535 <font class="keywordflow">if</font>(ptr==NULL)
00536 val= 0xFFFFFFFF;
00537 <font class="keywordflow">else</font>
00538 val= (uint32)(ptr-<a class="code" href="classNLPACS_1_1CChainQuad.html#o5">_QuadData</a>);
00539 f.<a class="code" href="classNLMISC_1_1IStream.html#a5">serial</a>(val);
00540 }
00541 }
00542
00543 }
00544
00545
00546
00547 } <font class="comment">// NLPACS</font>
</pre></div>
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