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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<CVectInfo> <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> &f) <font class="keywordflow">throw</font>(NLMISC::EStream)
00067 {
00071 sint ver = f.serialVersion(4);
00072 <font class="keywordflow">if</font> (ver > 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 <= 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 > 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<ITexture> 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> && <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#a1">hasTransparentFaces</a>())
00131 || (pass == <a class="code" href="namespaceNL3D.html#a484a169">PSSolidRender</a> && <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 &ps = *(<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>->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 < (1 << 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> &dest, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &<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>) > <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> &mat, CVertexBuffer &vb, uint8 *currVert, uint32 vertexSize,
00203 <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &I,
00204 <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &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->Proj.y > <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a> && next->Proj.y > <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->Proj - prev->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) > 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->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->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->Proj.y > <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->Proj.y - next->Proj.y) > <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a>)
00242 {
00243 <font class="keywordtype">float</font> lambda = (next->Proj.y - <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) / (next->Proj.y - prev->Proj.y);
00244 inter = lambda * prev->Interp + (1.f - lambda) * next->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->Interp;
00250 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos->Interp;
00251 <font class="keywordflow">return</font>;
00252 }
00253
00254 tangent = tInter - prev->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 > 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->Proj.y > <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->Proj.y - next->Proj.y) > <a class="code" href="namespaceNL3D.html#a217">NormEpsilon</a>)
00278 {
00279 <font class="keywordtype">float</font> lambda = (next->Proj.y - <a class="code" href="namespaceNL3D.html#a216">ZEpsilon</a>) / (next->Proj.y - prev->Proj.y);
00280 inter = lambda * prev->Interp + (1.f - lambda) * next->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->Interp;
00286 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos->Interp;
00287 <font class="keywordflow">return</font>;
00288 }
00289
00290 tangent = next->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 > 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->Interp;
00310 *(<a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> *) (currVert + vertexSize) = pos->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> < 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>->getOwner()->getSystemDate();
00325 uint8 *currVert;
00326
00327 CVBnPB &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 &VB = VBnPB.VB;
00329 CPrimitiveBlock &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 << 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>->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>->computeK();
00336
00337
00338 CMatrix mat = <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>->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-><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->activeVertexBuffer(VB);
00343 <a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>->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<float> sizes;
00350 <font class="keyword">static</font> std::vector<NLMISC::CRGBA> 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 &ps = *(<a class="code" href="classNL3D_1_1CPSLocatedBindable.html#n0">_Owner</a>->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>->make(this->_Owner, ribbonIndex, &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 = &<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>->make(this->_Owner, ribbonIndex, &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 < 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 >> 16), &rIt->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->Proj, mat * rIt->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>->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 >> 16),
00446 &rIt->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->Proj, mat * rIt->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) << 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> << 1) * toProcess);
00502 <font class="comment">// display the result</font>
00503 drv->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>->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 &CPSRibbonLookAt::getVBnPB()
00533 {
00534 <a class="code" href="classNL3D_1_1CPSRibbonLookAt.html#z734_0">TVBMap</a> &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->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 &VBnPB = map[<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> + 1]; <font class="comment">// make an entry</font>
00544
00546 CVertexBuffer &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 &pb = VBnPB.PB;
00554 pb.setNumTri((<a class="code" href="classNL3D_1_1CPSRibbonBase.html#n3">_UsedNbSegs</a> << 1) * numRibbonInVB);
00556 uint vbIndex = 0;
00557 uint pbIndex = 0;
00558 <font class="keywordflow">for</font> (uint i = 0; i < numRibbonInVB; ++i)
00559 {
00560 <font class="keywordflow">for</font> (uint k = 0; k < (<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>
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