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<hr><h1>ps_ribbon_look_at.cpp</h1><a href="ps__ribbon__look__at_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="ps__ribbon__look__at_8h.html">3d/ps_ribbon_look_at.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="particle__system_8h.html">3d/particle_system.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="ps__macro_8h.html">3d/ps_macro.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="driver_8h.html">3d/driver.h</a>"</font>
00032 
00033 <font class="keyword">namespace </font>NL3D 
00034 {
00035 
00037 <font class="comment">// CPSRibbonLookAt implementation //</font>
00039 <font class="comment"></font>
00040 <font class="keyword">const</font> <font class="keywordtype">float</font> <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a> = 10E-3f;
00041 <font class="keyword">const</font> <font class="keywordtype">float</font> <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a> = 10E-8f;
00042 
00043 
<a name="l00044"></a><a class="code" href="structNL3D_1_1CVectInfo.html">00044</a> <font class="keyword">struct </font>CVectInfo
00045 {
<a name="l00046"></a><a class="code" href="structNL3D_1_1CVectInfo.html#m0">00046</a>         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> <a class="code" href="structNL3D_1_1CVectInfo.html#m0">Interp</a>;
<a name="l00047"></a><a class="code" href="structNL3D_1_1CVectInfo.html#m1">00047</a>         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> <a class="code" href="structNL3D_1_1CVectInfo.html#m1">Proj</a>;   
00048 };
00049 <font class="keyword">typedef</font> std::vector&lt;CVectInfo&gt; <a class="code" href="namespaceNL3D.html#a218">TRibbonVect</a>; <font class="comment">// a vector used for intermediate computations</font>
00050 
<a name="l00051"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_3">00051</a> CPSRibbonLookAt::TVBMap         CPSRibbonLookAt::_VBMap;                        <font class="comment">// index buffers with no color</font>
<a name="l00052"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_4">00052</a> CPSRibbonLookAt::TVBMap         CPSRibbonLookAt::_ColoredVBMap;  <font class="comment">// index buffer + colors       </font>
00053 
00054 <font class="comment">//=======================================================       </font>
<a name="l00055"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z731_0">00055</a> CPSRibbonLookAt::CPSRibbonLookAt()
00056 {
00057 }
00058 
00059 <font class="comment">//=======================================================       </font>
<a name="l00060"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z731_1">00060</a> CPSRibbonLookAt::~CPSRibbonLookAt()
00061 {
00062 <font class="comment">//      delete _DyingRibbons;</font>
00063 }
00064 
00065 <font class="comment">//=======================================================       </font>
<a name="l00066"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z731_2">00066</a> <font class="keywordtype">void</font> CPSRibbonLookAt::serial(<a class="code" href="classNLMISC_1_1IStream.html">NLMISC::IStream</a> &amp;f) <font class="keywordflow">throw</font>(NLMISC::EStream)
00067 {
00071         sint ver = f.serialVersion(4);
00072         <font class="keywordflow">if</font> (ver &gt; 3)
00073         {
00074                 CPSRibbonBase::serial(f);
00075         }
00076         <font class="keywordflow">else</font>
00077         {
00078                 CPSParticle::serial(f);
00079         }
00080         CPSColoredParticle::serialColorScheme(f);       
00081         CPSSizedParticle::serialSizeScheme(f);          
00082         serialMaterial(f);
00083         uint32 dummy = 0; <font class="comment">/* _NbDyingRibbons */</font>
00084         <font class="keywordflow">if</font> (ver &lt;= 3)
00085         {
00086                 f.serial(_SegDuration, _NbSegs, dummy <font class="comment">/*_NbDyingRibbons*/</font>);
00087         }
00088         ITexture *tex = NULL;
00089 
00090         <font class="keywordflow">if</font> (ver &gt; 2)
00091         {
00092                 f.serial(_Parametric);
00093         }
00094 
00095 
00096         <font class="keywordflow">if</font> (!f.isReading())
00097         {               
00098                 tex = _Tex;
00099                 f.serialPolyPtr(tex);   
00100         }
00101         <font class="keywordflow">else</font>
00102         {               
00103                 f.serialPolyPtr(tex);
00104                 setTexture(tex);
00105                 setTailNbSeg(_NbSegs); <font class="comment">// force to build the vb</font>
00106         }       
00107 }
00108 
00109 
00110 <font class="comment">//=======================================================       </font>
<a name="l00111"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z732_0">00111</a> <font class="keywordtype">void</font> CPSRibbonLookAt::setTexture(CSmartPtr&lt;ITexture&gt; tex)
00112 {
00113         <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#n0">_Tex</a> = tex;
00114         <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#c0">updateMatAndVbForColor</a>();
00115 }
00116 
00117 
00118 <font class="comment">//=======================================================       </font>
<a name="l00119"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a0">00119</a> <font class="keywordtype">void</font> CPSRibbonLookAt::step(<a class="code" href="namespaceNL3D.html#a484">TPSProcessPass</a> pass, <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> ellapsedTime, <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> realEt)
00120 {       
00121         <font class="keywordflow">if</font> (pass == <a class="code" href="namespaceNL3D.html#a484a168">PSMotion</a>)
00122         {               
00123                 <font class="keywordflow">if</font> (!<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n2">_Parametric</a>)
00124                 {
00125                         <a class="code" href="classNL3D_1_1CPSRibbonBase.html#b5">updateGlobals</a>();
00126                 }
00127         }
00128         <font class="keywordflow">else</font>
00129         <font class="keywordflow">if</font> (
00130                 (pass == <a class="code" href="namespaceNL3D.html#a484a170">PSBlendRender</a> &amp;&amp; <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a1">hasTransparentFaces</a>())
00131                 || (pass == <a class="code" href="namespaceNL3D.html#a484a169">PSSolidRender</a> &amp;&amp; <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a2">hasOpaqueFaces</a>())
00132                 )
00133         {
00134                 uint32 <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a0">step</a>;
00135                 uint   numToProcess;
00136                 <a class="code" href="classNL3D_1_1CPSParticle.html#b4">computeSrcStep</a>(<a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a0">step</a>, numToProcess);     
00137                 <font class="keywordflow">if</font> (!numToProcess) <font class="keywordflow">return</font>;
00138                 
00140                 CParticleSystem &amp;ps = *(<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;getOwner());    
00141                 <a class="code" href="classNL3D_1_1CPSMaterial.html#n0">_Mat</a>.setColor(ps.getGlobalColor());
00142                 
00147                 <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#c1">displayRibbons</a>(numToProcess, <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a0">step</a>);
00148 
00149         }
00150         <font class="keywordflow">else</font> 
00151         <font class="keywordflow">if</font> (pass == <a class="code" href="namespaceNL3D.html#a484a171">PSToolRender</a>) <font class="comment">// edition mode only</font>
00152         {                       
00153                 <font class="comment">//showTool();</font>
00154         }       
00155 }
00156 
00157 
00158 <font class="comment">//=======================================================       </font>
<a name="l00159"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#b0">00159</a> <font class="keywordtype">void</font> CPSRibbonLookAt::newElement(CPSLocated *emitterLocated, uint32 emitterIndex)
00160 {
00161         CPSRibbonBase::newElement(emitterLocated, emitterIndex);
00162         <a class="code" href="classNL3D_1_1CPSColoredParticle.html#b2">newColorElement</a>(emitterLocated, emitterIndex);
00163         <a class="code" href="classNL3D_1_1CPSSizedParticle.html#b1">newSizeElement</a>(emitterLocated, emitterIndex);   
00164 }
00165 
00166 
00167 <font class="comment">//=======================================================       </font>
<a name="l00168"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#b1">00168</a> <font class="keywordtype">void</font> CPSRibbonLookAt::deleteElement(uint32 <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>)
00169 {
00170         CPSRibbonBase::deleteElement(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>);
00171         <a class="code" href="classNL3D_1_1CPSColoredParticle.html#b3">deleteColorElement</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>);
00172         <a class="code" href="classNL3D_1_1CPSSizedParticle.html#b2">deleteSizeElement</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>);       
00173 }
00174 
00175 
00176 <font class="comment">//=======================================================       </font>
<a name="l00177"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#b2">00177</a> <font class="keywordtype">void</font> CPSRibbonLookAt::resize(uint32 size)
00178 {
00179         <a class="code" href="debug_8h.html#a6">nlassert</a>(size &lt; (1 &lt;&lt; 16));
00180         CPSRibbonBase::resize(size);    
00181         <a class="code" href="classNL3D_1_1CPSColoredParticle.html#b4">resizeColor</a>(size);
00182         <a class="code" href="classNL3D_1_1CPSSizedParticle.html#b3">resizeSize</a>(size);                       
00183 }
00184 
00185 <font class="comment">//=======================================================       </font>
<a name="l00186"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#c0">00186</a> <font class="keywordtype">void</font> CPSRibbonLookAt::updateMatAndVbForColor(<font class="keywordtype">void</font>)
00187 {
00188         <a class="code" href="classNL3D_1_1CPSMaterial.html#n0">_Mat</a>.setTexture(0, <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#n0">_Tex</a>);
00189 }
00190 
00191 <font class="comment">//=======================================================       </font>
00192 <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">void</font> <a class="code" href="namespaceNL3D.html#a452">MakeProj</a>(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;dest, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>)
00193 {               
00194         <font class="keywordflow">if</font> (fabsf(src.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>) &gt; <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a> * <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a>)
00195         {
00196                 dest.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> = src.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> / src.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>;
00197                 dest.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> = src.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> / src.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>;
00198                 dest.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = src.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>; 
00199         }       
00200 }
00201 
00202 <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">void</font> <a class="code" href="namespaceNL3D.html#a453">BuildSlice</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CMatrix.html">NLMISC::CMatrix</a> &amp;mat, CVertexBuffer &amp;vb, uint8 *currVert, uint32 vertexSize,
00203                                                           <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;I, 
00204                                                           <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;K, 
00205                                                           TRibbonVect::iterator  pos,
00206                                                           TRibbonVect::iterator  prev,
00207                                                           TRibbonVect::iterator  next,
00208                                                           <font class="keywordtype">float</font> ribSize)
00210 {
00211         <a class="code" href="ps__macro_8h.html#a0">CHECK_VERTEX_BUFFER</a>(vb, currVert);
00212         <a class="code" href="ps__macro_8h.html#a0">CHECK_VERTEX_BUFFER</a>(vb, currVert);
00213         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> tangent;
00214 
00215         <font class="keywordtype">float</font> invTgNorm; <font class="comment">// inverse of the' norm of the projected segment</font>
00216         <font class="keywordtype">float</font> tgNorm;
00217 
00218         <font class="keywordflow">if</font> (prev-&gt;Proj.y &gt; <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a> &amp;&amp; next-&gt;Proj.y &gt; <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) <font class="comment">// the 2 points are in front of the camera</font>
00219         {
00220                 tangent = next-&gt;Proj - prev-&gt;Proj;
00221                 tangent.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = 0;
00222                 tgNorm = tangent.<a class="code" href="classNLMISC_1_1CVector.html#z331_2">norm</a>();
00223                 <font class="keywordflow">if</font> (fabs(tgNorm) &gt; 10E-8)
00224                 {
00225                         invTgNorm = 1.f / tgNorm;
00226                 }
00227                 <font class="keywordflow">else</font>
00228                 {
00229                         invTgNorm = 1.f;
00230                 }
00231                 <font class="comment">// build orthogonals vectors to tangent</font>
00232                 
00233                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) currVert = pos-&gt;Interp + ribSize * invTgNorm * (tangent.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> * K - tangent.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> * I);                                            
00234                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos-&gt;Interp + ribSize * invTgNorm * (- tangent.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> * K + tangent.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> * I);                   
00235         }
00236         <font class="keywordflow">else</font> <font class="keywordflow">if</font> (prev-&gt;Proj.y &gt; <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) <font class="comment">// second point cross the near plane</font>
00237         {
00238                 <font class="comment">// compute intersection point</font>
00239                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> inter;
00240                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> tInter;         
00241                 <font class="keywordflow">if</font> (fabsf(prev-&gt;Proj.y - next-&gt;Proj.y) &gt; <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a>)
00242                 {
00243                                 <font class="keywordtype">float</font> lambda = (next-&gt;Proj.y - <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) / (next-&gt;Proj.y - prev-&gt;Proj.y);
00244                                 inter = lambda * prev-&gt;Interp + (1.f - lambda) * next-&gt;Interp;                          
00245                                 <a class="code" href="namespaceNL3D.html#a452">MakeProj</a>(tInter, mat * inter);
00246                 }
00247                 <font class="keywordflow">else</font> <font class="comment">// </font>
00248                 {
00249                         *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) currVert = pos-&gt;Interp;
00250                         *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos-&gt;Interp;                     
00251                         <font class="keywordflow">return</font>;
00252                 }
00253                 
00254                 tangent = tInter - prev-&gt;Proj;          
00255                 tangent.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = 0;
00256 
00257                 tgNorm = tangent.<a class="code" href="classNLMISC_1_1CVector.html#z331_2">norm</a>();
00258                 <font class="keywordflow">if</font> (fabs(tgNorm &gt; 10E-8))
00259                 {
00260                         invTgNorm = 1.f / tgNorm;                       
00261                 }
00262                 <font class="keywordflow">else</font>
00263                 {
00264                         invTgNorm = 1.f;
00265                 }
00266                 <font class="comment">// build orthogonals vectors to tangent</font>
00267                 
00268                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) currVert = inter + ribSize *  invTgNorm * (tangent.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> * K - tangent.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> * I);         
00269                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = inter + ribSize * invTgNorm * (- tangent.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> * K + tangent.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> * I);
00270         }
00271         <font class="keywordflow">else</font> <font class="keywordflow">if</font> (next-&gt;Proj.y &gt; <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) <font class="comment">// first point cross the near plane</font>
00272         {
00273                         <font class="comment">// compute intersection point</font>
00274                 <font class="comment">// compute intersection point</font>
00275                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> inter;
00276                 <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> tInter;
00277                 <font class="keywordflow">if</font> (fabsf(prev-&gt;Proj.y - next-&gt;Proj.y) &gt; <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a>)
00278                 {
00279                                 <font class="keywordtype">float</font> lambda = (next-&gt;Proj.y - <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) / (next-&gt;Proj.y - prev-&gt;Proj.y);
00280                                 inter = lambda * prev-&gt;Interp + (1.f - lambda) * next-&gt;Interp;                          
00281                                 <a class="code" href="namespaceNL3D.html#a452">MakeProj</a>(tInter, mat * inter);
00282                 }
00283                 <font class="keywordflow">else</font> <font class="comment">// </font>
00284                 {
00285                         *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) currVert = pos-&gt;Interp;
00286                         *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos-&gt;Interp;
00287                         <font class="keywordflow">return</font>;
00288                 }
00289                 
00290                 tangent = next-&gt;Proj - tInter;          
00291                 tangent.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = 0;
00292                 tgNorm = tangent.<a class="code" href="classNLMISC_1_1CVector.html#z331_2">norm</a>();
00293                 <font class="keywordflow">if</font> (fabs(tgNorm &gt; 10E-8))
00294                 {
00295                         invTgNorm = 1.f / tgNorm;                       
00296                 }
00297                 <font class="keywordflow">else</font>
00298                 {
00299                         invTgNorm = 1.f;
00300                 }
00301                 <font class="comment">// build orthogonals vectors to tangent</font>
00302                 
00303                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) currVert = inter + ribSize * invTgNorm * (tangent.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> * K - tangent.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> * I);          
00304                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = inter + ribSize * invTgNorm * (- tangent.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a> * K + tangent.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a> * I);
00305 
00306         }
00307         <font class="keywordflow">else</font> <font class="comment">// two points are not visible</font>
00308         {
00309                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) currVert = pos-&gt;Interp;
00310                 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos-&gt;Interp;
00311         }
00312         
00313 }
00314 
00315 
00316 <font class="comment">//==========================================================================    </font>
<a name="l00317"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#c1">00317</a> <font class="keywordtype">void</font> CPSRibbonLookAt::displayRibbons(uint32 nbRibbons, uint32 srcStep)
00318 {       
00319         <font class="keywordflow">if</font> (!nbRibbons) <font class="keywordflow">return</font>;
00320         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>);       
00321         CPSRibbonBase::updateLOD();
00322         <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> &lt; 2) <font class="keywordflow">return</font>;
00323 
00324         <font class="keyword">const</font> <font class="keywordtype">float</font> date = <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;getOwner()-&gt;getSystemDate();
00325         uint8                                           *currVert;
00326 
00327         CVBnPB                                          &amp;VBnPB = <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_1">getVBnPB</a>(); <font class="comment">// get the appropriate vb (build it if needed)</font>
00328         CVertexBuffer                           &amp;VB = VBnPB.VB;
00329         CPrimitiveBlock                         &amp;PB = VBnPB.PB;
00330 
00331         <font class="keyword">const</font> uint32                            vertexSize  = VB.getVertexSize();
00332         uint                                            colorOffset=0;
00333         <font class="keyword">const</font> uint32                            vertexSizeX2  = vertexSize &lt;&lt; 1;
00334         <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>       I = <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;computeI();
00335         <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>       K = <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;computeK();
00336 
00337         
00338         CMatrix mat =  <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;isInSystemBasis() ? <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#a19">getViewMat</a>()  *  <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#a15">getSysMat</a>()
00339                                                                                                                                   : <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#a19">getViewMat</a>();
00340         IDriver *drv = this-&gt;<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#a10">getDriver</a>();
00341         <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#a21">setupDriverModelMatrix</a>();
00342         drv-&gt;activeVertexBuffer(VB);
00343         <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;incrementNbDrawnParticles(nbRibbons); <font class="comment">// for benchmark purpose  </font>
00344         
00345         <font class="keyword">const</font> uint numRibbonBatch = <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_2">getNumRibbonsInVB</a>(); <font class="comment">// number of ribons to process at once</font>
00346         
00347 
00348         <font class="keyword">static</font> <a class="code" href="namespaceNL3D.html#a218">TRibbonVect</a>                                 currRibbon;
00349         <font class="keyword">static</font> std::vector&lt;float&gt;                  sizes;
00350         <font class="keyword">static</font> std::vector&lt;NLMISC::CRGBA&gt;  colors;
00351 
00352 
00353         
00354         
00355 
00356         <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> == 0) <font class="keywordflow">return</font>;
00357 
00358         currRibbon.resize(<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1);
00359         sizes.resize(numRibbonBatch);
00360 
00361 
00363         CParticleSystem &amp;ps = *(<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;getOwner());
00364         <font class="keywordflow">if</font> (ps.getColorAttenuationScheme() != NULL)
00365         {               
00366                 CPSMaterial::forceModulateConstantColor(<font class="keyword">true</font>, ps.getGlobalColor());             
00367         }
00368         <font class="keywordflow">else</font>
00369         {       
00370                 <a class="code" href="classNL3D_1_1CPSMaterial.html#a4">forceModulateConstantColor</a>(<font class="keyword">false</font>);
00371                 <a class="code" href="classNL3D_1_1CPSMaterial.html#n0">_Mat</a>.setColor(ps.getGlobalColor());
00372         }
00373 
00374         <font class="keywordflow">if</font> (_ColorScheme)
00375         {
00376                 colorOffset = VB.getColorOff();
00377                 colors.resize(numRibbonBatch);          
00378         }
00379         
00380         
00381         uint toProcess;
00382         uint ribbonIndex = 0; <font class="comment">// index of the first ribbon in the batch being processed</font>
00383         
00384         uint32 fpRibbonIndex = 0;
00385 
00386         <font class="keywordflow">do</font>
00387         {
00388                 toProcess = <a class="code" href="bit__set_8cpp.html#a0">std::min</a>((uint) (nbRibbons - ribbonIndex) <font class="comment">/* = left to do */</font>, numRibbonBatch);
00389         
00390 
00392                 <font class="keyword">const</font> <font class="keywordtype">float</font>     *ptCurrSize;
00393                 uint32  ptCurrSizeIncrement;
00394                 <font class="keywordflow">if</font> (_SizeScheme)
00395                 {                       
00396                         ptCurrSize = (<font class="keywordtype">float</font> *) <a class="code" href="classNL3D_1_1CPSSizedParticle.html#n1">_SizeScheme</a>-&gt;make(this-&gt;_Owner, ribbonIndex, &amp;sizes[0], <font class="keyword">sizeof</font>(<font class="keywordtype">float</font>), toProcess, <font class="keyword">true</font>, srcStep);                        
00397                         ptCurrSizeIncrement = 1;
00398                 }
00399                 <font class="keywordflow">else</font>
00400                 {
00401                         ptCurrSize = &amp;<a class="code" href="classNL3D_1_1CPSSizedParticle.html#n0">_ParticleSize</a>;
00402                         ptCurrSizeIncrement = 0;
00403                 }
00404 
00406                 <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a>   *ptCurrColor=0;
00407                 <font class="keywordflow">if</font> (_ColorScheme)
00408                 {
00409                         colors.resize(nbRibbons);
00410                         ptCurrColor = (<a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> *) <a class="code" href="classNL3D_1_1CPSColoredParticle.html#n1">_ColorScheme</a>-&gt;make(this-&gt;_Owner, ribbonIndex, &amp;colors[0], <font class="keyword">sizeof</font>(<a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a>), toProcess, <font class="keyword">true</font>, srcStep);                     
00411                 }               
00412                 
00413                 currVert = (uint8 *) VB.getVertexCoordPointer();
00414                 <font class="keywordflow">for</font> (uint k = ribbonIndex; k &lt; ribbonIndex + toProcess; ++k)
00415                 {                       
00416                         
00417                         TRibbonVect::iterator rIt = currRibbon.begin(), rItEnd = currRibbon.end(), rItEndMinusOne = rItEnd - 1;
00418 
00420                         <font class="comment">// interpolate and project points //</font>
00422 <font class="comment">                </font>
00423                                 <font class="keywordflow">if</font> (!<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n2">_Parametric</a>)
00424                                 {
00425 
00427                                         <font class="comment">// INCREMENTAL CASE //</font>
00429 <font class="comment"></font>
00430                                         <font class="comment">// the parent class has a method to get the ribbons positions</font>
00431                                         <a class="code" href="classNL3D_1_1CPSRibbonBase.html#b4">computeRibbon</a>((uint) (fpRibbonIndex &gt;&gt; 16), &amp;rIt-&gt;Interp, <font class="keyword">sizeof</font>(CVectInfo));                           
00432                                         <font class="keywordflow">do</font>
00433                                         {                                       
00434                                                 <a class="code" href="namespaceNL3D.html#a452">MakeProj</a>(rIt-&gt;Proj, mat * rIt-&gt;Interp); 
00435                                                 ++rIt;                          
00436                                         }
00437                                         <font class="keywordflow">while</font> (rIt != rItEnd);                  
00438                                 }
00439                                 <font class="keywordflow">else</font>
00440                                 {
00442                                         <font class="comment">// PARAMETRIC  CASE //</font>
00444 <font class="comment">                                        // we compute each pos thanks to the parametric curve                           </font>
00445                                         <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;integrateSingle(date - <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n4">_UsedSegDuration</a> * (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1), <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n4">_UsedSegDuration</a>, <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1, (uint) (fpRibbonIndex &gt;&gt; 16),
00446                                                                                          &amp;rIt-&gt;Interp, <font class="keyword">sizeof</font>(CVectInfo) );                             
00447                                         <font class="comment">// project each position now</font>
00448                                         <font class="keywordflow">do</font>
00449                                         {                                       
00450                                                 <a class="code" href="namespaceNL3D.html#a452">MakeProj</a>(rIt-&gt;Proj, mat * rIt-&gt;Interp); 
00451                                                 ++rIt;                          
00452                                         }
00453                                         <font class="keywordflow">while</font> (rIt != rItEnd);                  
00454                                 }
00455 
00456                                 rIt = currRibbon.begin();
00457 
00458                 
00459                                 <font class="comment">// setup colors</font>
00460                                 <font class="keywordflow">if</font> (_ColorScheme)
00461                                 {
00462                                         uint8 *currColVertex = currVert + colorOffset;
00463                                         uint colCount = (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1) &lt;&lt; 1;
00464                                         <font class="keywordflow">do</font>
00465                                         {
00466                                                 * (CRGBA *) currColVertex = *ptCurrColor;
00467                                                 currColVertex += vertexSize;
00468                                         }
00469                                         <font class="keywordflow">while</font> (--colCount);
00470 
00471                                         ++ptCurrColor;                  
00472                                 }
00473 
00475                                 <font class="comment">// deals with first point                               </font>
00476                                 <a class="code" href="namespaceNL3D.html#a453">BuildSlice</a>(mat, VB, currVert, vertexSize, I, K, rIt, rIt, rIt + 1, *ptCurrSize);                                
00477                                 currVert += vertexSizeX2;               
00478                                 ++rIt;
00479 
00480                                 
00481                                 <font class="comment">// deals with other points                              </font>
00482                                 <font class="keywordflow">for</font> (;;) <font class="comment">// we assume at least 2 segments, so we must have a middle point               </font>
00483                                 {                                               
00484                                         <font class="comment">// build 2 vertices with the right tangent. /* to project 2 */ is old projected point</font>
00485                                         <a class="code" href="namespaceNL3D.html#a453">BuildSlice</a>(mat, VB, currVert, vertexSize, I, K, rIt, rIt - 1, rIt + 1, *ptCurrSize); 
00486                                         <font class="comment">// next position                </font>
00487                                         ++rIt;
00488                                         <font class="keywordflow">if</font> (rIt == rItEndMinusOne) <font class="keywordflow">break</font>;                                       
00489                                         <font class="comment">// next vertex                  </font>
00490                                         currVert += vertexSizeX2;               
00491                                 }
00492                                 currVert += vertexSizeX2;
00493                                 <font class="comment">// last point.</font>
00494                                 <a class="code" href="namespaceNL3D.html#a453">BuildSlice</a>(mat, VB, currVert, vertexSize, I, K, rIt , rIt - 1, rIt, *ptCurrSize);                                                                               
00495                                 ptCurrSize += ptCurrSizeIncrement;
00496                                 currVert += vertexSizeX2;
00497 
00498                                 fpRibbonIndex += srcStep;
00499                 }
00500 
00501                 PB.setNumTri((<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> &lt;&lt; 1) * toProcess);
00502                 <font class="comment">// display the result</font>
00503                 drv-&gt;render(PB, <a class="code" href="classNL3D_1_1CPSMaterial.html#n0">_Mat</a>);
00504                 ribbonIndex += toProcess;               
00505         }
00506         <font class="keywordflow">while</font> (ribbonIndex != nbRibbons);
00507 }       
00508 
00509 <font class="comment">//==========================================================================    </font>
<a name="l00510"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a1">00510</a> <font class="keywordtype">bool</font> CPSRibbonLookAt::hasTransparentFaces(<font class="keywordtype">void</font>)
00511 {
00512         <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CPSMaterial.html#a3">getBlendingMode</a>() != CPSMaterial::alphaTest ;
00513 }
00514 
00515 
00516 <font class="comment">//==========================================================================    </font>
<a name="l00517"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a2">00517</a> <font class="keywordtype">bool</font> CPSRibbonLookAt::hasOpaqueFaces(<font class="keywordtype">void</font>)
00518 {
00519         <font class="keywordflow">return</font> !<a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a1">hasTransparentFaces</a>();
00520 }
00521 
00522 <font class="comment">//==========================================================================    </font>
<a name="l00523"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a3">00523</a> uint32 CPSRibbonLookAt::getMaxNumFaces(<font class="keywordtype">void</font>)<font class="keyword"> const</font>
00524 <font class="keyword"></font>{
00525         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>);
00526         <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>-&gt;getMaxSize() * <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n0">_NbSegs</a> * 2;      
00527 }
00528 
00529 
00530 
00531 <font class="comment">//==========================================================================    </font>
<a name="l00532"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_1">00532</a> CPSRibbonLookAt::CVBnPB &amp;CPSRibbonLookAt::getVBnPB()
00533 {
00534         <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_0">TVBMap</a> &amp;map = <a class="code" href="classNL3D_1_1CPSColoredParticle.html#n1">_ColorScheme</a> ? <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_3">_VBMap</a> : <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_4">_ColoredVBMap</a>;    
00535         TVBMap::iterator it = map.find(<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1);
00536         <font class="keywordflow">if</font> (it != map.end())
00537         {
00538                 <font class="keywordflow">return</font> it-&gt;second;
00539         }
00540         <font class="keywordflow">else</font>    <font class="comment">// must create this vb</font>
00541         {
00542                 <font class="keyword">const</font> uint numRibbonInVB = <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_2">getNumRibbonsInVB</a>();
00543                 CVBnPB &amp;VBnPB = map[<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1]; <font class="comment">// make an entry</font>
00544 
00546                 CVertexBuffer &amp;vb = VBnPB.VB;
00547                 vb.setVertexFormat(CVertexBuffer::PositionFlag |
00548                                                    CVertexBuffer::TexCoord0Flag | 
00549                                                    (<a class="code" href="classNL3D_1_1CPSColoredParticle.html#n1">_ColorScheme</a> ? CVertexBuffer::PrimaryColorFlag : 0));
00550                 vb.setNumVertices(2 * (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1) * numRibbonInVB );
00551 
00552                 <font class="comment">// set the primitive block size</font>
00553                 CPrimitiveBlock &amp;pb = VBnPB.PB;
00554                 pb.setNumTri((<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> &lt;&lt; 1) * numRibbonInVB);
00556                 uint vbIndex = 0;
00557                 uint pbIndex = 0; 
00558                 <font class="keywordflow">for</font> (uint i = 0; i &lt; numRibbonInVB; ++i)
00559                 {
00560                         <font class="keywordflow">for</font> (uint k = 0; k &lt; (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1); ++k)
00561                         {                               
00562                                 vb.setTexCoord(vbIndex, 0, CUV((1.f - k / (<font class="keywordtype">float</font>) <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a>), 0)); 
00563                                 vb.setTexCoord(vbIndex + 1, 0, CUV((1.f - k / (<font class="keywordtype">float</font>) <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a>), 1)); 
00564                                 <font class="keywordflow">if</font> (k != <a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a>)
00565                                 {
00567                                         pb.setTri(pbIndex ++, vbIndex + 1, vbIndex + 2, vbIndex);
00568                                         pb.setTri(pbIndex ++, vbIndex + 1, vbIndex + 3, vbIndex + 2);
00569                                 }
00570                                 vbIndex += 2;
00571                         }
00572                 }
00573                 <font class="keywordflow">return</font> VBnPB;
00574         }
00575 }
00576 
00577 <font class="comment">//==========================================================================    </font>
<a name="l00578"></a><a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_2">00578</a> uint    CPSRibbonLookAt::getNumRibbonsInVB()<font class="keyword"> const</font>
00579 <font class="keyword"></font>{
00581         <font class="keyword">const</font> uint vertexInVB = 256;    
00582         <font class="keywordflow">return</font> std::max(1u, (uint) (vertexInVB / (<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1)));
00583 }
00584 
00585 } <font class="comment">// NL3D</font>
</pre></div>

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