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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
committerneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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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&lt;CRenderTrav *&gt;(Trav);
+00063 CFlareModel *m = NLMISC::safe_cast&lt;CFlareModel *&gt;(Model);
+00064 IDriver *drv = trav-&gt;getDriver();
+00065 <font class="keywordflow">if</font> (trav-&gt;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>-&gt;WorldMatrix.getPos(); <font class="comment">// unstransformed pos </font>
+00071 <font class="keyword">const</font> CVector pt = trav-&gt;ViewMatrix * upt;
+00072
+00073
+00074
+00075 <font class="keywordflow">if</font> (pt.y &lt;= trav-&gt;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-&gt;Shape);
+00081 CFlareShape *fs = NLMISC::safe_cast&lt;CFlareShape *&gt;((IShape *) m-&gt;Shape);
+00082
+00083
+00084 <font class="keywordflow">if</font> (pt.y &gt; fs-&gt;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-&gt;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-&gt;getMaxViewDist();
+00099 distIntensity = distRatio &gt; fs-&gt;getMaxViewDistRatio() ? 1.f - (distRatio - fs-&gt;getMaxViewDistRatio()) / (1.f - fs-&gt;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-&gt;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-&gt;Left + trav-&gt;Right);
+00106 <font class="keyword">const</font> <font class="keywordtype">float</font> middleZ = .5f * (trav-&gt;Bottom + trav-&gt;Top);
+00107 <font class="keyword">const</font> sint xPos = (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>&gt;&gt;1) + (sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> * (((trav-&gt;Near * pt.x) / pt.y) - middleX) / (trav-&gt;Right - trav-&gt;Left));
+00108 <font class="keyword">const</font> sint yPos = (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>&gt;&gt;1) - (sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> * (((trav-&gt;Near * pt.z) / pt.y) - middleZ) / (trav-&gt;Top - trav-&gt;Bottom));
+00109
+00110 <font class="comment">// read z-buffer value at the pos we are</font>
+00111 <font class="keyword">static</font> std::vector&lt;float&gt; <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-&gt;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-&gt;Far) / (1.0 /trav-&gt;Near - 1.0 / trav-&gt;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> &gt; <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-&gt;getPersistence();
+00122 <font class="keywordflow">if</font> (fs == 0)
+00123 {
+00124 m-&gt;_Intensity = 0;
+00125 <font class="keywordflow">return</font>;
+00126 }
+00127 <font class="keywordflow">else</font>
+00128 {
+00129 m-&gt;_Intensity -= 1.f / p * (float)m-&gt;_Scene-&gt;getEllapsedTime();
+00130 <font class="keywordflow">if</font> (m-&gt;_Intensity &lt; 0.f)
+00131 {
+00132 m-&gt;_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-&gt;getPersistence();
+00140 <font class="keywordflow">if</font> (fs == 0)
+00141 {
+00142 m-&gt;_Intensity = 1;
+00143 }
+00144 <font class="keywordflow">else</font>
+00145 {
+00146 m-&gt;_Intensity += 1.f / p * (float)m-&gt;_Scene-&gt;getEllapsedTime();
+00147 <font class="keywordflow">if</font> (m-&gt;_Intensity &gt; 1.f) m-&gt;_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-&gt;activeVertexProgram(NULL);
+00182 drv-&gt;setupModelMatrix(CMatrix::Identity);
+00183 drv-&gt;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-&gt;Near + trav-&gt;Far);
+00189 <font class="keyword">const</font> <font class="keywordtype">float</font> zPosDivNear = zPos / trav-&gt;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-&gt;Right - trav-&gt;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-&gt;Right - trav-&gt;Left));
+00194 <font class="comment">//</font>
+00195 <font class="keyword">const</font> <font class="keywordtype">float</font> aY = - ( (trav-&gt;Top - trav-&gt;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-&gt;Top - trav-&gt;Bottom));
+00197
+00198 <font class="keyword">const</font> CVector I = trav-&gt;CamMatrix.getI();
+00199 <font class="keyword">const</font> CVector J = trav-&gt;CamMatrix.getJ();
+00200 <font class="keyword">const</font> CVector K = trav-&gt;CamMatrix.getK();
+00201 <font class="comment">//</font>
+00202 CRGBA col;
+00203 CRGBA flareColor = fs-&gt;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>&gt;&gt;1)) * (xPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>&gt;&gt;1)) + (yPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>&gt;&gt;1))*(yPos - (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>&gt;&gt;1)))))
+00205 / (float) (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>&gt;&gt;1);
+00206
+00207 <font class="comment">// check for dazzle and draw it</font>
+00208 <font class="keywordflow">if</font> (fs-&gt;hasDazzle())
+00209 {
+00210 <font class="keywordflow">if</font> (norm &lt; fs-&gt;getDazzleAttenuationRange())
+00211 {
+00212 <font class="keywordtype">float</font> dazzleIntensity = 1.f - norm / fs-&gt;getDazzleAttenuationRange();
+00213 CRGBA dazzleColor = fs-&gt;getDazzleColor();
+00214 col.modulateFromui(dazzleColor, (uint) (255.f * m-&gt;_Intensity * dazzleIntensity));
+00215 material.setColor(col);
+00216 material.setTexture(0, NULL);
+00217
+00218 <font class="keyword">const</font> CVector dazzleCenter = trav-&gt;CamPos + zPos * J;
+00219 <font class="keyword">const</font> CVector dI = (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>&gt;&gt;1) * aX * I;
+00220 <font class="keyword">const</font> CVector dK = (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>&gt;&gt;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-&gt;renderQuads(material, 0, 1);
+00228 }
+00229 }
+00230 <font class="keywordflow">if</font> (!fs-&gt;getAttenuable() )
+00231 {
+00232 col.modulateFromui(flareColor, (uint) (255.f * distIntensity * m-&gt;_Intensity));
+00233 }
+00234 <font class="keywordflow">else</font>
+00235 {
+00236 <font class="keywordflow">if</font> (norm &gt; fs-&gt;getAttenuationRange() || fs-&gt;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-&gt;_Intensity * (1.f - norm / fs-&gt;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-&gt;getFlareSpacing() * ((sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> &gt;&gt; 1) - xPos);
+00251 <font class="keyword">const</font> <font class="keywordtype">float</font> dY = fs-&gt;getFlareSpacing() * ((sint) (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> &gt;&gt; 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-&gt;getFirstFlareKeepSize())
+00259 {
+00260 tex = fs-&gt;getTexture(0);
+00261 <font class="keywordflow">if</font> (tex)
+00262 {
+00263 size = fs-&gt;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-&gt;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 &lt; <a class="code" href="namespaceNL3D.html#a39">MaxFlareNum</a>; ++k)
+00282 {
+00283 tex = fs-&gt;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-&gt;getRelativePos(k)) + bX) * I
+00289 + zPos * J + (aY * (yPos + dY * fs-&gt;getRelativePos(k)) + bY) * K + trav-&gt;CamMatrix.getPos();
+00290
+00291
+00292
+00293
+00294 size = fs-&gt;getSize(k) / trav-&gt;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-&gt;renderQuads(material, 0, 1);
+00301 }
+00302
+00303 }
+00304 this-&gt;<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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