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<title>pbrt: felt.cpp Source File</title>
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<h1>felt.cpp</h1><a href="felt_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">// felt.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">// Felt Class Declarations</span>
<a name="l00028"></a><a class="code" href="classFelt.html">00028</a> <span class="keyword">class </span><a class="code" href="classFelt.html">Felt</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><a class="code" href="classFelt.html#e8f49da52e73f994b728927d8a633d2f">00030</a> <a class="code" href="classFelt.html#e8f49da52e73f994b728927d8a633d2f">Felt</a>(<a class="code" href="classReference.html">Reference</a><<a class="code" href="classTexture.html">Texture<float></a> > bump) : <a class="code" href="classFelt.html#df9b9f43ea3e74a48b8b84113c9429b6">bumpMap</a>(bump) { }
<a name="l00031"></a>00031 <a class="code" href="classBSDF.html">BSDF</a> *<a class="code" href="classFelt.html#716ea8e36625592b07b91211ec9030bb">GetBSDF</a>(<span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgGeom, <span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgShading) <span class="keyword">const</span>;
<a name="l00032"></a><a class="code" href="classFelt.html#df9b9f43ea3e74a48b8b84113c9429b6">00032</a> <a class="code" href="classReference.html">Reference<Texture<float></a> > <a class="code" href="classFelt.html#df9b9f43ea3e74a48b8b84113c9429b6">bumpMap</a>;
<a name="l00033"></a>00033 };
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">// Felt Method Definitions</span>
<a name="l00036"></a><a class="code" href="classFelt.html#716ea8e36625592b07b91211ec9030bb">00036</a> <a class="code" href="classBSDF.html">BSDF</a> *<a class="code" href="classFelt.html#716ea8e36625592b07b91211ec9030bb">Felt::GetBSDF</a>(<span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgGeom, <span class="keyword">const</span> <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> &dgShading)<span class="keyword"> const </span>{
<a name="l00037"></a>00037 <span class="comment">// Declare felt coefficients</span>
<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keywordtype">float</span> diffuse[3] = { 0.025865<a class="code" href="classBSDF.html#137c0efa679347a2787b366effdeeb50">f</a>, 0.025865f, 0.025865f};
<a name="l00039"></a>00039 <span class="keyword">static</span> <span class="keywordtype">float</span> xy0[3] = { -0.304075f, -0.304075f, -0.304075f};
<a name="l00040"></a>00040 <span class="keyword">static</span> <span class="keywordtype">float</span> z0[3] = { -0.065992f, -0.065992f, -0.065992f};
<a name="l00041"></a>00041 <span class="keyword">static</span> <span class="keywordtype">float</span> e0[3] = { 3.047892f, 3.047892f, 3.047892f};
<a name="l00042"></a>00042 <span class="keyword">static</span> <span class="keywordtype">float</span> xy1[3] = { -0.749561f, -0.749561f, -0.749561f};
<a name="l00043"></a>00043 <span class="keyword">static</span> <span class="keywordtype">float</span> z1[3] = { -1.167929f, -1.167929f, -1.167929f};
<a name="l00044"></a>00044 <span class="keyword">static</span> <span class="keywordtype">float</span> e1[3] = { 6.931827f, 6.931827f, 6.931827f};
<a name="l00045"></a>00045 <span class="keyword">static</span> <span class="keywordtype">float</span> xy2[3] = { 1.004921f, 1.004921f, 1.004921f};
<a name="l00046"></a>00046 <span class="keyword">static</span> <span class="keywordtype">float</span> z2[3] = { -0.205529f, -0.205529f, -0.205529f};
<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keywordtype">float</span> e2[3] = { 94.117332f, 94.117332f, 94.117332f};
<a name="l00048"></a>00048 <span class="keyword">static</span> <a class="code" href="classSpectrum.html">Spectrum</a> xy[3] = { <a class="code" href="classSpectrum.html">Spectrum</a>(xy0), <a class="code" href="classSpectrum.html">Spectrum</a>(xy1), <a class="code" href="classSpectrum.html">Spectrum</a>(xy2) };
<a name="l00049"></a>00049 <span class="keyword">static</span> <a class="code" href="classSpectrum.html">Spectrum</a> z[3] = { <a class="code" href="classSpectrum.html">Spectrum</a>(z0), <a class="code" href="classSpectrum.html">Spectrum</a>(z1), <a class="code" href="classSpectrum.html">Spectrum</a>(z2) };
<a name="l00050"></a>00050 <span class="keyword">static</span> <a class="code" href="classSpectrum.html">Spectrum</a> e[3] = { <a class="code" href="classSpectrum.html">Spectrum</a>(e0), <a class="code" href="classSpectrum.html">Spectrum</a>(e1), <a class="code" href="classSpectrum.html">Spectrum</a>(e2) };
<a name="l00051"></a>00051 <span class="comment">// Allocate _BSDF_, possibly doing bump-mapping with _bumpMap_</span>
<a name="l00052"></a>00052 <a class="code" href="structDifferentialGeometry.html">DifferentialGeometry</a> dgs;
<a name="l00053"></a>00053 <span class="keywordflow">if</span> (<a class="code" href="classFelt.html#df9b9f43ea3e74a48b8b84113c9429b6">bumpMap</a>)
<a name="l00054"></a>00054 <a class="code" href="classMaterial.html#c3e544e3e58d1044b82da2993d412bef">Bump</a>(<a class="code" href="classFelt.html#df9b9f43ea3e74a48b8b84113c9429b6">bumpMap</a>, dgGeom, dgShading, &dgs);
<a name="l00055"></a>00055 <span class="keywordflow">else</span>
<a name="l00056"></a>00056 dgs = dgShading;
<a name="l00057"></a>00057 <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="l00058"></a>00058 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="classLafortune.html">Lafortune</a>)(<a class="code" href="classSpectrum.html">Spectrum</a>(diffuse), 3, xy, xy, z, e,
<a name="l00059"></a>00059 <a class="code" href="reflection_8h.html#0ab5fa7d70a51348af4188bf1e669730">BxDFType</a>(<a class="code" href="reflection_8h.html#0ab5fa7d70a51348af4188bf1e6697304331da0ab7ddceadcfffa81ecf70577e">BSDF_REFLECTION</a> | <a class="code" href="reflection_8h.html#0ab5fa7d70a51348af4188bf1e669730f9e3fbf437624bc9cbe69860ff6c7b80">BSDF_DIFFUSE</a>)));
<a name="l00060"></a>00060 <span class="keywordflow">return</span> bsdf;
<a name="l00061"></a>00061 }
<a name="l00062"></a><a class="code" href="felt_8cpp.html#408b27babfc96df09044b99cd96a3d8b">00062</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="l00063"></a>00063 <span class="keyword">const</span> <a class="code" href="classTextureParams.html">TextureParams</a> &mp) {
<a name="l00064"></a>00064 <a class="code" href="classReference.html">Reference<Texture<float></a> > <a class="code" href="classFelt.html#df9b9f43ea3e74a48b8b84113c9429b6">bumpMap</a> = mp.<a class="code" href="classTextureParams.html#d416140fa1530ed88480419f79be07e0">GetFloatTexture</a>(<span class="stringliteral">"bumpmap"</span>, 0.f);
<a name="l00065"></a>00065 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classFelt.html#e8f49da52e73f994b728927d8a633d2f">Felt</a>(bumpMap);
<a name="l00066"></a>00066 }
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