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<h1>light.cpp</h1><a href="light_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">/*</span>
<a name="l00003"></a>00003 <span class="comment"> pbrt source code Copyright(c) 1998-2007 Matt Pharr and Greg Humphreys.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> This file is part of pbrt.</span>
<a name="l00006"></a>00006 <span class="comment"></span>
<a name="l00007"></a>00007 <span class="comment"> pbrt is free software; you can redistribute it and/or modify</span>
<a name="l00008"></a>00008 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
<a name="l00009"></a>00009 <span class="comment"> the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00010"></a>00010 <span class="comment"> (at your option) any later version. Note that the text contents of</span>
<a name="l00011"></a>00011 <span class="comment"> the book "Physically Based Rendering" are *not* licensed under the</span>
<a name="l00012"></a>00012 <span class="comment"> GNU GPL.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment"> pbrt is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00017"></a>00017 <span class="comment"> GNU General Public License for more details.</span>
<a name="l00018"></a>00018 <span class="comment"></span>
<a name="l00019"></a>00019 <span class="comment"> You should have received a copy of the GNU General Public License</span>
<a name="l00020"></a>00020 <span class="comment"> along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
<a name="l00021"></a>00021 <span class="comment"></span>
<a name="l00022"></a>00022 <span class="comment"> */</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="comment">// light.cpp*</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="light_8h.html">light.h</a>"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="scene_8h.html">scene.h</a>"</span>
<a name="l00027"></a>00027 <span class="comment">// Light Method Definitions</span>
<a name="l00028"></a><a class="code" href="classLight.html#d0e59fad13bb6cfadc25b2c477e9ddc7">00028</a> <a class="code" href="classLight.html#d0e59fad13bb6cfadc25b2c477e9ddc7">Light::~Light</a>() {
<a name="l00029"></a>00029 }
<a name="l00030"></a><a class="code" href="structVisibilityTester.html#07e2c29afee9b3d6df35fd367861a19d">00030</a> <span class="keywordtype">bool</span> <a class="code" href="structVisibilityTester.html#07e2c29afee9b3d6df35fd367861a19d">VisibilityTester::Unoccluded</a>(<span class="keyword">const</span> <a class="code" href="classScene.html">Scene</a> *scene)<span class="keyword"> const </span>{
<a name="l00031"></a>00031 <span class="comment">// Update shadow ray statistics</span>
<a name="l00032"></a>00032 <span class="keyword">static</span> <a class="code" href="classStatsCounter.html">StatsCounter</a> nShadowRays(<span class="stringliteral">"Lights"</span>,
<a name="l00033"></a>00033 <span class="stringliteral">"Number of shadow rays traced"</span>);
<a name="l00034"></a>00034 ++nShadowRays;
<a name="l00035"></a>00035 <span class="keywordflow">return</span> !scene-><a class="code" href="classScene.html#558b5f74407c7479517ef82b0fe3f913">IntersectP</a>(<a class="code" href="structVisibilityTester.html#1f2673f216c444f41ff59bc4dd3ed8b8">r</a>);
<a name="l00036"></a>00036 }
<a name="l00037"></a>00037 <a class="code" href="classSpectrum.html">Spectrum</a> <a class="code" href="structVisibilityTester.html#21b6d9b0540abf25e1c593bc2a6b2f79">VisibilityTester::</a>
<a name="l00038"></a><a class="code" href="structVisibilityTester.html#21b6d9b0540abf25e1c593bc2a6b2f79">00038</a> <a class="code" href="structVisibilityTester.html#21b6d9b0540abf25e1c593bc2a6b2f79"> Transmittance</a>(<span class="keyword">const</span> <a class="code" href="classScene.html">Scene</a> *scene)<span class="keyword"> const </span>{
<a name="l00039"></a>00039 <span class="keywordflow">return</span> scene-><a class="code" href="classScene.html#c80ef18b12e54a64a809de677aada2e9">Transmittance</a>(<a class="code" href="structVisibilityTester.html#1f2673f216c444f41ff59bc4dd3ed8b8">r</a>);
<a name="l00040"></a>00040 }
<a name="l00041"></a><a class="code" href="classLight.html#677f9b00e0c8702fc57e87dc24a6a10e">00041</a> <a class="code" href="classSpectrum.html">Spectrum</a> <a class="code" href="classLight.html#677f9b00e0c8702fc57e87dc24a6a10e">Light::Le</a>(<span class="keyword">const</span> <a class="code" href="classRayDifferential.html">RayDifferential</a> &)<span class="keyword"> const </span>{
<a name="l00042"></a>00042 <span class="keywordflow">return</span> <a class="code" href="classSpectrum.html">Spectrum</a>(0.);
<a name="l00043"></a>00043 }
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