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<title>pbrt: matte.cpp Source File</title>
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<h1>matte.cpp</h1><a href="matte_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">// matte.cpp*</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="pbrt_8h.html">pbrt.h</a>"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="material_8h.html">material.h</a>"</span>
<a name="l00027"></a>00027 <span class="comment">// Matte Class Declarations</span>
<a name="l00028"></a><a class="code" href="classMatte.html">00028</a> <span class="keyword">class </span><a class="code" href="classMatte.html">Matte</a> : <span class="keyword">public</span> <a class="code" href="classMaterial.html">Material</a> {
<a name="l00029"></a>00029 <span class="keyword">public</span>:
<a name="l00030"></a>00030 <span class="comment">// Matte Public Methods</span>
<a name="l00031"></a><a class="code" href="classMatte.html#6b7e082daec8968c1ee4e4cdadfea81c">00031</a> <a class="code" href="classMatte.html#6b7e082daec8968c1ee4e4cdadfea81c">Matte</a>(<a class="code" href="classReference.html">Reference</a><<a class="code" href="classTexture.html">Texture<Spectrum></a> > kd,
<a name="l00032"></a>00032 <a class="code" href="classReference.html">Reference</a><<a class="code" href="classTexture.html">Texture<float></a> > sig,
<a name="l00033"></a>00033 <a class="code" href="classReference.html">Reference</a><<a class="code" href="classTexture.html">Texture<float></a> > bump) {
<a name="l00034"></a>00034 <a class="code" href="classMatte.html#50c7e19eb1b02e556af77cad75eac67e">Kd</a> = kd;
<a name="l00035"></a>00035 <a class="code" href="classMatte.html#6e4cf321cd4eaf48b9d4c27ac65d88e4">sigma</a> = sig;
<a name="l00036"></a>00036 <a class="code" href="classMatte.html#3f05e53e5c42e11ff5097619de868c6d">bumpMap</a> = bump;
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038 <a class="code" href="classBSDF.html">BSDF</a> *<a class="code" href="classMatte.html#91642d4f68e750583da7a83a5794e95e">GetBSDF</a>(<span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgGeom,
<a name="l00039"></a>00039 <span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgShading) <span class="keyword">const</span>;
<a name="l00040"></a>00040 <span class="keyword">private</span>:
<a name="l00041"></a>00041 <span class="comment">// Matte Private Data</span>
<a name="l00042"></a><a class="code" href="classMatte.html#50c7e19eb1b02e556af77cad75eac67e">00042</a> <a class="code" href="classReference.html">Reference<Texture<Spectrum></a> > <a class="code" href="classMatte.html#50c7e19eb1b02e556af77cad75eac67e">Kd</a>;
<a name="l00043"></a><a class="code" href="classMatte.html#6e4cf321cd4eaf48b9d4c27ac65d88e4">00043</a> <a class="code" href="classReference.html">Reference<Texture<float></a> > <a class="code" href="classMatte.html#6e4cf321cd4eaf48b9d4c27ac65d88e4">sigma</a>, <a class="code" href="classMatte.html#3f05e53e5c42e11ff5097619de868c6d">bumpMap</a>;
<a name="l00044"></a>00044 };
<a name="l00045"></a>00045 <span class="comment">// Matte Method Definitions</span>
<a name="l00046"></a><a class="code" href="classMatte.html#91642d4f68e750583da7a83a5794e95e">00046</a> <a class="code" href="classBSDF.html">BSDF</a> *<a class="code" href="classMatte.html#91642d4f68e750583da7a83a5794e95e">Matte::GetBSDF</a>(<span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgGeom,
<a name="l00047"></a>00047 <span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgShading)<span class="keyword"> const </span>{
<a name="l00048"></a>00048 <span class="comment">// Allocate _BSDF_, possibly doing bump-mapping with _bumpMap_</span>
<a name="l00049"></a>00049 <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> dgs;
<a name="l00050"></a>00050 <span class="keywordflow">if</span> (<a class="code" href="classMatte.html#3f05e53e5c42e11ff5097619de868c6d">bumpMap</a>)
<a name="l00051"></a>00051 <a class="code" href="classMaterial.html#c3e544e3e58d1044b82da2993d412bef">Bump</a>(<a class="code" href="classMatte.html#3f05e53e5c42e11ff5097619de868c6d">bumpMap</a>, dgGeom, dgShading, &dgs);
<a name="l00052"></a>00052 <span class="keywordflow">else</span>
<a name="l00053"></a>00053 dgs = dgShading;
<a name="l00054"></a>00054 <a class="code" href="classBSDF.html">BSDF</a> *bsdf = <a class="code" href="reflection_8h.html#3bf385d77eb4b6df8e24ace1df730cc2">BSDF_ALLOC</a>(<a class="code" href="classBSDF.html">BSDF</a>)(dgs, dgGeom.<a class="code" href="structDifferentialGeometry.html#1aa044f6c7b053ca460c10b0cf832c14">nn</a>);
<a name="l00055"></a>00055 <span class="comment">// Evaluate textures for _Matte_ material and allocate BRDF</span>
<a name="l00056"></a>00056 <a class="code" href="classSpectrum.html">Spectrum</a> r = <a class="code" href="classMatte.html#50c7e19eb1b02e556af77cad75eac67e">Kd</a>->Evaluate(dgs).Clamp();
<a name="l00057"></a>00057 <span class="keywordtype">float</span> sig = <a class="code" href="pbrt_8h.html#036098e5cec04b73d8720de12e8e5cd1">Clamp</a>(<a class="code" href="classMatte.html#6e4cf321cd4eaf48b9d4c27ac65d88e4">sigma</a>->Evaluate(dgs), 0.f, 90.f);
<a name="l00058"></a>00058 <span class="keywordflow">if</span> (sig == 0.)
<a name="l00059"></a>00059 bsdf-><a class="code" href="classBSDF.html#92c90b4b7eeff9a877f25faa80d616ee">Add</a>(<a class="code" href="reflection_8h.html#3bf385d77eb4b6df8e24ace1df730cc2">BSDF_ALLOC</a>(<a class="code" href="classLambertian.html">Lambertian</a>)(r));
<a name="l00060"></a>00060 <span class="keywordflow">else</span>
<a name="l00061"></a>00061 bsdf-><a class="code" href="classBSDF.html#92c90b4b7eeff9a877f25faa80d616ee">Add</a>(<a class="code" href="reflection_8h.html#3bf385d77eb4b6df8e24ace1df730cc2">BSDF_ALLOC</a>(<a class="code" href="classOrenNayar.html">OrenNayar</a>)(r, sig));
<a name="l00062"></a>00062 <span class="keywordflow">return</span> bsdf;
<a name="l00063"></a>00063 <span class="keywordflow">return</span> bsdf;
<a name="l00064"></a>00064 }
<a name="l00065"></a><a class="code" href="matte_8cpp.html#408b27babfc96df09044b99cd96a3d8b">00065</a> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> <a class="code" href="pbrt_8h.html#808e08638be3cba36e36759e5b150de0">DLLEXPORT</a> <a class="code" href="classMaterial.html">Material</a> * <a class="code" href="bluepaint_8cpp.html#408b27babfc96df09044b99cd96a3d8b">CreateMaterial</a>(<span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &xform,
<a name="l00066"></a>00066 <span class="keyword">const</span> <a class="code" href="classTextureParams.html">TextureParams</a> &mp) {
<a name="l00067"></a>00067 <a class="code" href="classReference.html">Reference<Texture<Spectrum></a> > <a class="code" href="classMatte.html#50c7e19eb1b02e556af77cad75eac67e">Kd</a> = mp.<a class="code" href="classTextureParams.html#974170db9e1829ef01a082ad7fdf2bc3">GetSpectrumTexture</a>(<span class="stringliteral">"Kd"</span>, <a class="code" href="classSpectrum.html">Spectrum</a>(1.f));
<a name="l00068"></a>00068 <a class="code" href="classReference.html">Reference<Texture<float></a> > <a class="code" href="classMatte.html#6e4cf321cd4eaf48b9d4c27ac65d88e4">sigma</a> = mp.<a class="code" href="classTextureParams.html#d416140fa1530ed88480419f79be07e0">GetFloatTexture</a>(<span class="stringliteral">"sigma"</span>, 0.f);
<a name="l00069"></a>00069 <a class="code" href="classReference.html">Reference<Texture<float></a> > <a class="code" href="classMatte.html#3f05e53e5c42e11ff5097619de868c6d">bumpMap</a> = mp.<a class="code" href="classTextureParams.html#d416140fa1530ed88480419f79be07e0">GetFloatTexture</a>(<span class="stringliteral">"bumpmap"</span>, 0.f);
<a name="l00070"></a>00070 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classMatte.html#6b7e082daec8968c1ee4e4cdadfea81c">Matte</a>(Kd, sigma, bumpMap);
<a name="l00071"></a>00071 }
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