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<hr><h1>flare_model.cpp</h1><a href="flare__model_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2000, 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="flare__model_8h.html">3d/flare_model.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="flare__shape_8h.html">3d/flare_shape.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="driver_8h.html">3d/driver.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="material_8h.html">3d/material.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="dru_8h.html">3d/dru.h</a>"</font>
00033 <font class="preprocessor">#include "<a class="code" href="scene_8h.html">3d/scene.h</a>"</font>
00034 <font class="preprocessor">#include "<a class="code" href="render__trav_8h.html">3d/render_trav.h</a>"</font>
00035
00036
00037
00038 <font class="keyword">namespace </font>NL3D {
00039
00040
00041 <font class="comment">/*</font>
00042 <font class="comment"> * Constructor</font>
00043 <font class="comment"> */</font>
<a name="l00044"></a><a class="code" href="classNL3D_1_1CFlareModel.html#a0">00044</a> CFlareModel::CFlareModel() : _Intensity(0)
00045 {
00046 <a class="code" href="classNL3D_1_1CTransform.html#a0">setTransparency</a>(<font class="keyword">true</font>);
00047 <a class="code" href="classNL3D_1_1CTransform.html#a1">setOpacity</a>(<font class="keyword">false</font>);
00048 }
00049
<a name="l00050"></a><a class="code" href="classNL3D_1_1CFlareModel.html#d0">00050</a> <font class="keywordtype">void</font> CFlareModel::registerBasic()
00051 {
00052 <font class="comment">// register the model and his observers</font>
00053 CMOT::registerModel(<a class="code" href="namespaceNL3D.html#a38">FlareModelClassId</a>, <a class="code" href="namespaceNL3D.html#a277">TransformShapeId</a>, CFlareModel::creator);
00054 CMOT::registerObs(<a class="code" href="namespaceNL3D.html#a232">RenderTravId</a>, <a class="code" href="namespaceNL3D.html#a38">FlareModelClassId</a>, CFlareRenderObs::creator);
00055 }
00056
00057
00058
00059
<a name="l00060"></a><a class="code" href="classNL3D_1_1CFlareRenderObs.html#a0">00060</a> <font class="keywordtype">void</font> CFlareRenderObs::traverse(IObs *caller)
00061 {
00062 CRenderTrav *trav = NLMISC::safe_cast<CRenderTrav *>(Trav);
00063 CFlareModel *m = NLMISC::safe_cast<CFlareModel *>(Model);
00064 IDriver *drv = trav->getDriver();
00065 <font class="keywordflow">if</font> (trav->isCurrentPassOpaque()) <font class="keywordflow">return</font>;
00066
00067
00068
00069 <font class="comment">// transform the flare on screen </font>
00070 <font class="keyword">const</font> CVector upt = <a class="code" href="classNL3D_1_1IBaseRenderObs.html#m0">HrcObs</a>->WorldMatrix.getPos(); <font class="comment">// unstransformed pos </font>
00071 <font class="keyword">const</font> CVector pt = trav->ViewMatrix * upt;
00072
00073
00074
00075 <font class="keywordflow">if</font> (pt.y <= trav->Near)
00076 {
00077 <font class="keywordflow">return</font>; <font class="comment">// flare behind us</font>
00078 }
00079
00080 <a class="code" href="debug_8h.html#a6">nlassert</a>(m->Shape);
00081 CFlareShape *fs = NLMISC::safe_cast<CFlareShape *>((IShape *) m->Shape);
00082
00083
00084 <font class="keywordflow">if</font> (pt.y > fs->getMaxViewDist())
00085 {
00086 <font class="keywordflow">return</font>; <font class="comment">// flare too far away</font>
00087 }
00088
00089 <font class="keywordtype">float</font> distIntensity;
00090
00091 <font class="keywordflow">if</font> (fs->getFlareAtInfiniteDist())
00092 {
00093 distIntensity = 1.f;
00094 }
00095 <font class="keywordflow">else</font>
00096 {
00097 <font class="comment">// compute a color ratio for attenuation with distance</font>
00098 <font class="keyword">const</font> <font class="keywordtype">float</font> distRatio = pt.y / fs->getMaxViewDist();
00099 distIntensity = distRatio > fs->getMaxViewDistRatio() ? 1.f - (distRatio - fs->getMaxViewDistRatio()) / (1.f - fs->getMaxViewDistRatio()) : 1.f;
00100 }
00101
00102 <font class="comment">// compute position on screen</font>
00103 uint32 <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>;
00104 drv->getWindowSize(<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>);
00105 <font class="keyword">const</font> <font class="keywordtype">float</font> middleX = .5f * (trav->Left + trav->Right);
00106 <font class="keyword">const</font> <font class="keywordtype">float</font> middleZ = .5f * (trav->Bottom + trav->Top);
00107 <font class="keyword">const</font> sint xPos = (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>>>1) + (sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> * (((trav->Near * pt.x) / pt.y) - middleX) / (trav->Right - trav->Left));
00108 <font class="keyword">const</font> sint yPos = (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>>>1) - (sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> * (((trav->Near * pt.z) / pt.y) - middleZ) / (trav->Top - trav->Bottom));
00109
00110 <font class="comment">// read z-buffer value at the pos we are</font>
00111 <font class="keyword">static</font> std::vector<float> <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>(1);
00112 <a class="code" href="classNLMISC_1_1CRect.html">NLMISC::CRect</a> rect(xPos, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> - yPos, 1, 1);
00113 drv->getZBufferPart(<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>, rect);
00114
00115 <font class="comment">// project in screen space</font>
00116 <font class="keyword">const</font> <font class="keywordtype">float</font> <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> = (float) (1.0 - (1.0 / pt.y - 1.0 / trav->Far) / (1.0 /trav->Near - 1.0 / trav->Far));
00117
00118
00119 <font class="keywordflow">if</font> (!<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>.size() || <a class="code" href="driver__opengl__extension__def_8h.html#a366">z</a> > <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[0]) <font class="comment">// test against z-buffer</font>
00120 {
00121 <font class="keywordtype">float</font> p = fs->getPersistence();
00122 <font class="keywordflow">if</font> (fs == 0)
00123 {
00124 m->_Intensity = 0;
00125 <font class="keywordflow">return</font>;
00126 }
00127 <font class="keywordflow">else</font>
00128 {
00129 m->_Intensity -= 1.f / p * (float)m->_Scene->getEllapsedTime();
00130 <font class="keywordflow">if</font> (m->_Intensity < 0.f)
00131 {
00132 m->_Intensity = 0.f;
00133 <font class="keywordflow">return</font>; <font class="comment">// nothing to draw</font>
00134 }
00135 }
00136 }
00137 <font class="keywordflow">else</font>
00138 {
00139 <font class="keywordtype">float</font> p = fs->getPersistence();
00140 <font class="keywordflow">if</font> (fs == 0)
00141 {
00142 m->_Intensity = 1;
00143 }
00144 <font class="keywordflow">else</font>
00145 {
00146 m->_Intensity += 1.f / p * (float)m->_Scene->getEllapsedTime();
00147 <font class="keywordflow">if</font> (m->_Intensity > 1.f) m->_Intensity = 1.f;
00148 }
00149 }
00150
00151 <font class="keyword">static</font> CMaterial material;
00152 <font class="keyword">static</font> CVertexBuffer vb;
00153
00154 <font class="keyword">static</font> <font class="keywordtype">bool</font> setupDone = <font class="keyword">false</font>;
00155
00156
00157 <font class="keywordflow">if</font> (!setupDone)
00158 {
00159 material.setBlend(<font class="keyword">true</font>);
00160 material.setBlendFunc(CMaterial::one, CMaterial::one);
00161 material.setZWrite(<font class="keyword">false</font>);
00162 material.setZFunc(CMaterial::always);
00163 material.setLighting(<font class="keyword">false</font>);
00164 material.setDoubleSided(<font class="keyword">true</font>);
00165
00166 <font class="comment">// setup vertex buffer</font>
00167 vb.setVertexFormat(CVertexBuffer::PositionFlag | CVertexBuffer::TexCoord0Flag);
00168 vb.setNumVertices(4);
00169 vb.setTexCoord(0, 0, <a class="code" href="classNLMISC_1_1CUV.html">NLMISC::CUV</a>(1, 0));
00170 vb.setTexCoord(1, 0, <a class="code" href="classNLMISC_1_1CUV.html">NLMISC::CUV</a>(1, 1));
00171 vb.setTexCoord(2, 0, <a class="code" href="classNLMISC_1_1CUV.html">NLMISC::CUV</a>(0, 1));
00172 vb.setTexCoord(3, 0, <a class="code" href="classNLMISC_1_1CUV.html">NLMISC::CUV</a>(0, 0));
00173
00174 setupDone = <font class="keyword">true</font>;
00175 }
00176
00177
00178
00179
00180 <font class="comment">// setup driver </font>
00181 drv->activeVertexProgram(NULL);
00182 drv->setupModelMatrix(CMatrix::Identity);
00183 drv->activeVertexBuffer(vb);
00184
00185
00186 <font class="comment">// we don't change the fustrum to draw 2d shapes : it is costly, and we need to restore it after the drawing has been done</font>
00187 <font class="comment">// we setup Z to be (near + far) / 2, and setup x and y to get the screen coordinates we want</font>
00188 <font class="keyword">const</font> <font class="keywordtype">float</font> zPos = 0.5f * (trav->Near + trav->Far);
00189 <font class="keyword">const</font> <font class="keywordtype">float</font> zPosDivNear = zPos / trav->Near;
00190
00191 <font class="comment">// compute the coeeff so that x = ax * px + bx; y = ax * py + by</font>
00192 <font class="keyword">const</font> <font class="keywordtype">float</font> aX = ( (trav->Right - trav->Left) / (float) <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>) * zPosDivNear;
00193 <font class="keyword">const</font> <font class="keywordtype">float</font> bX = zPosDivNear * (middleX - 0.5f * (trav->Right - trav->Left));
00194 <font class="comment">//</font>
00195 <font class="keyword">const</font> <font class="keywordtype">float</font> aY = - ( (trav->Top - trav->Bottom) / (float) <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>) * zPosDivNear;
00196 <font class="keyword">const</font> <font class="keywordtype">float</font> bY = zPosDivNear * (middleZ + 0.5f * (trav->Top - trav->Bottom));
00197
00198 <font class="keyword">const</font> CVector I = trav->CamMatrix.getI();
00199 <font class="keyword">const</font> CVector J = trav->CamMatrix.getJ();
00200 <font class="keyword">const</font> CVector K = trav->CamMatrix.getK();
00201 <font class="comment">//</font>
00202 CRGBA col;
00203 CRGBA flareColor = fs->getColor();
00204 <font class="keyword">const</font> <font class="keywordtype">float</font> norm = sqrtf((<font class="keywordtype">float</font>) (((xPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>>>1)) * (xPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>>>1)) + (yPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>>>1))*(yPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>>>1)))))
00205 / (float) (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>>>1);
00206
00207 <font class="comment">// check for dazzle and draw it</font>
00208 <font class="keywordflow">if</font> (fs->hasDazzle())
00209 {
00210 <font class="keywordflow">if</font> (norm < fs->getDazzleAttenuationRange())
00211 {
00212 <font class="keywordtype">float</font> dazzleIntensity = 1.f - norm / fs->getDazzleAttenuationRange();
00213 CRGBA dazzleColor = fs->getDazzleColor();
00214 col.modulateFromui(dazzleColor, (uint) (255.f * m->_Intensity * dazzleIntensity));
00215 material.setColor(col);
00216 material.setTexture(0, NULL);
00217
00218 <font class="keyword">const</font> CVector dazzleCenter = trav->CamPos + zPos * J;
00219 <font class="keyword">const</font> CVector dI = (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>>>1) * aX * I;
00220 <font class="keyword">const</font> CVector dK = (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>>>1) * bX * K;
00221
00222 vb.setVertexCoord(0, dazzleCenter + dI + dK);
00223 vb.setVertexCoord(1, dazzleCenter + dI - dK);
00224 vb.setVertexCoord(2, dazzleCenter - dI - dK);
00225 vb.setVertexCoord(3, dazzleCenter - dI + dK);
00226
00227 drv->renderQuads(material, 0, 1);
00228 }
00229 }
00230 <font class="keywordflow">if</font> (!fs->getAttenuable() )
00231 {
00232 col.modulateFromui(flareColor, (uint) (255.f * distIntensity * m->_Intensity));
00233 }
00234 <font class="keywordflow">else</font>
00235 {
00236 <font class="keywordflow">if</font> (norm > fs->getAttenuationRange() || fs->getAttenuationRange() == 0.f)
00237 {
00238 <font class="keywordflow">return</font>; <font class="comment">// nothing to draw; </font>
00239 }
00240 col.modulateFromui(flareColor, (uint) (255.f * distIntensity * m->_Intensity * (1.f - norm / fs->getAttenuationRange() )));
00241 }
00242
00243
00244 material.setColor(col);
00245
00246 CVector scrPos; <font class="comment">// vector that will map to the center of the flare on scree</font>
00247
00248 <font class="comment">// process each flare</font>
00249 <font class="comment">// delta for each new Pos </font>
00250 <font class="keyword">const</font> <font class="keywordtype">float</font> dX = fs->getFlareSpacing() * ((sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> >> 1) - xPos);
00251 <font class="keyword">const</font> <font class="keywordtype">float</font> dY = fs->getFlareSpacing() * ((sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> >> 1) - yPos);
00252
00253 <font class="keywordtype">float</font> size; <font class="comment">// size of the current flare</font>
00254
00255 uint k = 0;
00256 ITexture *tex;
00257
00258 <font class="keywordflow">if</font> (fs->getFirstFlareKeepSize())
00259 {
00260 tex = fs->getTexture(0);
00261 <font class="keywordflow">if</font> (tex)
00262 {
00263 size = fs->getSize(0);
00264
00265 vb.setVertexCoord(0, upt + size * (I + K) );
00266 vb.setVertexCoord(1, upt + size * (I - K) );
00267 vb.setVertexCoord(2, upt + size * (-I - K) );
00268 vb.setVertexCoord(3, upt + size * (-I + K) );
00269
00270
00271 material.setTexture(0, tex);
00272 drv->renderQuads(material, 0, 1);
00273 k = 1;
00274 }
00275 }
00276 <font class="keywordflow">else</font>
00277 {
00278 k = 0;
00279 }
00280
00281 <font class="keywordflow">for</font> (; k < <a class="code" href="namespaceNL3D.html#a39">MaxFlareNum</a>; ++k)
00282 {
00283 tex = fs->getTexture(k);
00284 <font class="keywordflow">if</font> (tex)
00285 {
00286 <font class="comment">// compute vector that map to the center of the flare</font>
00287
00288 scrPos = (aX * (xPos + dX * fs->getRelativePos(k)) + bX) * I
00289 + zPos * J + (aY * (yPos + dY * fs->getRelativePos(k)) + bY) * K + trav->CamMatrix.getPos();
00290
00291
00292
00293
00294 size = fs->getSize(k) / trav->Near;
00295 vb.setVertexCoord(0, scrPos + size * (I + K) );
00296 vb.setVertexCoord(1, scrPos + size * (I - K) );
00297 vb.setVertexCoord(2, scrPos + size * (-I - K) );
00298 vb.setVertexCoord(3, scrPos + size * (-I + K) );
00299 material.setTexture(0, tex);
00300 drv->renderQuads(material, 0, 1);
00301 }
00302
00303 }
00304 this-><a class="code" href="classNL3D_1_1IObs.html#z620_0">traverseSons</a>();
00305 }
00306
00307
00308
00309 } <font class="comment">// NL3D</font>
</pre></div>
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