doxygen/html/transform_8cpp-source.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>pbrt: transform.cpp Source File</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
<link href="tabs.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.5.6 -->
<div class="navigation" id="top">
  <div class="tabs">
    <ul>
      <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
      <li><a href="annotated.html"><span>Classes</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
    </ul>
  </div>
<h1>transform.cpp</h1><a href="transform_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 &lt;http://www.gnu.org/licenses/&gt;.</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">// transform.cpp*</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="transform_8h.html">transform.h</a>"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="shape_8h.html">shape.h</a>"</span>
<a name="l00027"></a>00027 <span class="comment">// Transform Method Definitions</span>
<a name="l00028"></a><a class="code" href="transform_8cpp.html#1486ad9a6498b14a26944fca91489129">00028</a> ostream &amp;<a class="code" href="color_8cpp.html#3b3bb63dabe75a974aab091b1d698db1">operator&lt;&lt;</a>(ostream &amp;os, <span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &amp;t) {
<a name="l00029"></a>00029         t.<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;Print(os);
<a name="l00030"></a>00030         <span class="keywordflow">return</span> os;
<a name="l00031"></a>00031 }
<a name="l00032"></a><a class="code" href="transform_8cpp.html#dcfb331b19053e5b60008c68e78f7b81">00032</a> <a class="code" href="pbrt_8h.html#1ca894daa11d476d9e76947dceaf0255">COREDLL</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#dcfb331b19053e5b60008c68e78f7b81">Translate</a>(<span class="keyword">const</span> <a class="code" href="classVector.html">Vector</a> &amp;delta) {
<a name="l00033"></a>00033         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *m, *minv;
<a name="l00034"></a>00034         m = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(1, 0, 0, delta.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a>,
<a name="l00035"></a>00035                       0, 1, 0, delta.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a>,
<a name="l00036"></a>00036                       0, 0, 1, delta.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a>,
<a name="l00037"></a>00037                       0, 0, 0,       1);
<a name="l00038"></a>00038         minv = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(1, 0, 0, -delta.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a>,
<a name="l00039"></a>00039                          0, 1, 0, -delta.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a>,
<a name="l00040"></a>00040                          0, 0, 1, -delta.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a>,
<a name="l00041"></a>00041                          0, 0, 0,        1);
<a name="l00042"></a>00042         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(m, minv);
<a name="l00043"></a>00043 }
<a name="l00044"></a><a class="code" href="transform_8cpp.html#f6b012272269020d52792d1ed65c7904">00044</a> <a class="code" href="pbrt_8h.html#1ca894daa11d476d9e76947dceaf0255">COREDLL</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#f6b012272269020d52792d1ed65c7904">Scale</a>(<span class="keywordtype">float</span> x, <span class="keywordtype">float</span> y, <span class="keywordtype">float</span> z) {
<a name="l00045"></a>00045         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *m, *minv;
<a name="l00046"></a>00046         m = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(x, 0, 0, 0,
<a name="l00047"></a>00047                       0, y, 0, 0,
<a name="l00048"></a>00048                       0, 0, z, 0,
<a name="l00049"></a>00049                       0, 0, 0, 1);
<a name="l00050"></a>00050         minv = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(1.f/x,     0,     0, 0,
<a name="l00051"></a>00051                              0, 1.f/y,     0, 0,
<a name="l00052"></a>00052                              0,     0, 1.f/z, 0,
<a name="l00053"></a>00053                              0,     0,     0, 1);
<a name="l00054"></a>00054         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(m, minv);
<a name="l00055"></a>00055 }
<a name="l00056"></a><a class="code" href="transform_8cpp.html#383c812891d89203e96963f8dfe329e2">00056</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#3e45cc944e9c00d11169f9a7380a5660">RotateX</a>(<span class="keywordtype">float</span> angle) {
<a name="l00057"></a>00057         <span class="keywordtype">float</span> sin_t = sinf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00058"></a>00058         <span class="keywordtype">float</span> cos_t = cosf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00059"></a>00059         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *m = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(1,     0,      0, 0,
<a name="l00060"></a>00060                                  0, cos_t, -sin_t, 0,
<a name="l00061"></a>00061                                  0, sin_t,  cos_t, 0,
<a name="l00062"></a>00062                                  0,     0,      0, 1);
<a name="l00063"></a>00063         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(m, m-&gt;<a class="code" href="structMatrix4x4.html#0523a8cf829f239e2ffdd93599926e0b">Transpose</a>());
<a name="l00064"></a>00064 }
<a name="l00065"></a><a class="code" href="transform_8cpp.html#5d53d8abd5fb20464429468213bef214">00065</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#fcc5ff131fc39eeaa3a19cb0eac02984">RotateY</a>(<span class="keywordtype">float</span> angle) {
<a name="l00066"></a>00066         <span class="keywordtype">float</span> sin_t = sinf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00067"></a>00067         <span class="keywordtype">float</span> cos_t = cosf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00068"></a>00068         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *m = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>( cos_t,   0, sin_t, 0,
<a name="l00069"></a>00069                                       0,   1,     0, 0,
<a name="l00070"></a>00070                                  -sin_t,   0, cos_t, 0,
<a name="l00071"></a>00071                                       0,   0,     0, 1);
<a name="l00072"></a>00072         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(m, m-&gt;<a class="code" href="structMatrix4x4.html#0523a8cf829f239e2ffdd93599926e0b">Transpose</a>());
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074 
<a name="l00075"></a><a class="code" href="transform_8cpp.html#ca1575955cfd7cc977fae5f4b666ad92">00075</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#13e6b5d16eb2807a90b32b757e39aea2">RotateZ</a>(<span class="keywordtype">float</span> angle) {
<a name="l00076"></a>00076         <span class="keywordtype">float</span> sin_t = sinf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00077"></a>00077         <span class="keywordtype">float</span> cos_t = cosf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00078"></a>00078         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *m = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(cos_t, -sin_t, 0, 0,
<a name="l00079"></a>00079                                  sin_t,  cos_t, 0, 0,
<a name="l00080"></a>00080                                  0,      0, 1, 0,
<a name="l00081"></a>00081                                  0,      0, 0, 1);
<a name="l00082"></a>00082         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(m, m-&gt;<a class="code" href="structMatrix4x4.html#0523a8cf829f239e2ffdd93599926e0b">Transpose</a>());
<a name="l00083"></a>00083 }
<a name="l00084"></a><a class="code" href="transform_8cpp.html#e9a59d716d9cb6277e15f4fe182e9021">00084</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#351ec748c80266cff77f6bafc8414c54">Rotate</a>(<span class="keywordtype">float</span> angle, <span class="keyword">const</span> <a class="code" href="classVector.html">Vector</a> &amp;axis) {
<a name="l00085"></a>00085         <a class="code" href="classVector.html">Vector</a> a = <a class="code" href="geometry_8h.html#46448bfa3df1c2de5e3b763f163866a4">Normalize</a>(axis);
<a name="l00086"></a>00086         <span class="keywordtype">float</span> s = sinf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00087"></a>00087         <span class="keywordtype">float</span> c = cosf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(angle));
<a name="l00088"></a>00088         <span class="keywordtype">float</span> m[4][4];
<a name="l00089"></a>00089 
<a name="l00090"></a>00090         m[0][0] = a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> + (1.f - a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a>) * c;
<a name="l00091"></a>00091         m[0][1] = a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * (1.f - c) - a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * s;
<a name="l00092"></a>00092         m[0][2] = a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * (1.f - c) + a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * s;
<a name="l00093"></a>00093         m[0][3] = 0;
<a name="l00094"></a>00094 
<a name="l00095"></a>00095         m[1][0] = a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * (1.f - c) + a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * s;
<a name="l00096"></a>00096         m[1][1] = a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> + (1.f - a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a>) * c;
<a name="l00097"></a>00097         m[1][2] = a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * (1.f - c) - a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * s;
<a name="l00098"></a>00098         m[1][3] = 0;
<a name="l00099"></a>00099 
<a name="l00100"></a>00100         m[2][0] = a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * (1.f - c) - a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * s;
<a name="l00101"></a>00101         m[2][1] = a.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a> * a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * (1.f - c) + a.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a> * s;
<a name="l00102"></a>00102         m[2][2] = a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> + (1.f - a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a> * a.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a>) * c;
<a name="l00103"></a>00103         m[2][3] = 0;
<a name="l00104"></a>00104 
<a name="l00105"></a>00105         m[3][0] = 0;
<a name="l00106"></a>00106         m[3][1] = 0;
<a name="l00107"></a>00107         m[3][2] = 0;
<a name="l00108"></a>00108         m[3][3] = 1;
<a name="l00109"></a>00109 
<a name="l00110"></a>00110         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *mat = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(m);
<a name="l00111"></a>00111         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(mat, mat-&gt;<a class="code" href="structMatrix4x4.html#0523a8cf829f239e2ffdd93599926e0b">Transpose</a>());
<a name="l00112"></a>00112 }
<a name="l00113"></a><a class="code" href="transform_8cpp.html#c9698f6abfc6f27ee31250ba474987d6">00113</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#289f82edc6f111331550a6fa5b18be44">LookAt</a>(<span class="keyword">const</span> <a class="code" href="classPoint.html">Point</a> &amp;pos, <span class="keyword">const</span> <a class="code" href="classPoint.html">Point</a> &amp;look, <span class="keyword">const</span> <a class="code" href="classVector.html">Vector</a> &amp;up) {
<a name="l00114"></a>00114         <span class="keywordtype">float</span> m[4][4];
<a name="l00115"></a>00115         <span class="comment">// Initialize fourth column of viewing matrix</span>
<a name="l00116"></a>00116         m[0][3] = pos.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>;
<a name="l00117"></a>00117         m[1][3] = pos.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>;
<a name="l00118"></a>00118         m[2][3] = pos.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>;
<a name="l00119"></a>00119         m[3][3] = 1;
<a name="l00120"></a>00120         <span class="comment">// Initialize first three columns of viewing matrix</span>
<a name="l00121"></a>00121         <a class="code" href="classVector.html">Vector</a> dir = <a class="code" href="geometry_8h.html#46448bfa3df1c2de5e3b763f163866a4">Normalize</a>(look - pos);
<a name="l00122"></a>00122         <a class="code" href="classVector.html">Vector</a> right = <a class="code" href="geometry_8h.html#46448bfa3df1c2de5e3b763f163866a4">Normalize</a>(<a class="code" href="geometry_8h.html#340d6d877ba46443c9ad20e7c0d0668f">Cross</a>(dir, up));
<a name="l00123"></a>00123         <a class="code" href="classVector.html">Vector</a> newUp = <a class="code" href="geometry_8h.html#340d6d877ba46443c9ad20e7c0d0668f">Cross</a>(right, dir);
<a name="l00124"></a>00124         m[0][0] = right.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a>;
<a name="l00125"></a>00125         m[1][0] = right.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a>;
<a name="l00126"></a>00126         m[2][0] = right.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a>;
<a name="l00127"></a>00127         m[3][0] = 0.;
<a name="l00128"></a>00128         m[0][1] = newUp.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a>;
<a name="l00129"></a>00129         m[1][1] = newUp.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a>;
<a name="l00130"></a>00130         m[2][1] = newUp.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a>;
<a name="l00131"></a>00131         m[3][1] = 0.;
<a name="l00132"></a>00132         m[0][2] = dir.<a class="code" href="classVector.html#ca49165049a1e21ae47afcfc078819ed">x</a>;
<a name="l00133"></a>00133         m[1][2] = dir.<a class="code" href="classVector.html#81be9102fca6d9beea3efef522c4c09d">y</a>;
<a name="l00134"></a>00134         m[2][2] = dir.<a class="code" href="classVector.html#0e84237d0830d5c459bfa5676b5fbfba">z</a>;
<a name="l00135"></a>00135         m[3][2] = 0.;
<a name="l00136"></a>00136         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *camToWorld = <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(m);
<a name="l00137"></a>00137         <span class="keywordflow">return</span> <a class="code" href="classTransform.html">Transform</a>(camToWorld-&gt;<a class="code" href="structMatrix4x4.html#8ee73c372cbe5966f7e65a0fb2a91ea8">Inverse</a>(), camToWorld);
<a name="l00138"></a>00138 }
<a name="l00139"></a><a class="code" href="classTransform.html#8ef54fec2a1579988b13ae1b850fa6fd">00139</a> <span class="keywordtype">bool</span> <a class="code" href="classTransform.html#8ef54fec2a1579988b13ae1b850fa6fd">Transform::HasScale</a>()<span class="keyword"> const </span>{
<a name="l00140"></a>00140 <span class="preprocessor">#if 0</span>
<a name="l00141"></a>00141 <span class="preprocessor"></span>        <span class="keywordtype">float</span> det = fabsf(<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[0][0] * (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][1] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][2] - <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][2] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][1])) -
<a name="l00142"></a>00142                 (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[0][1] * (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][0] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][2] - <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][2] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][0])) +
<a name="l00143"></a>00143                 (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[0][2] * (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][0] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][1] - <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][1] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][0]));
<a name="l00144"></a>00144         <span class="keywordflow">return</span> (det &lt; .999f || det &gt; 1.001f);
<a name="l00145"></a>00145 <span class="preprocessor">#endif</span>
<a name="l00146"></a>00146 <span class="preprocessor"></span>        <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00147"></a>00147 }
<a name="l00148"></a><a class="code" href="classTransform.html#2fb250701deb7ff66ca65001c329c72f">00148</a> <a class="code" href="classBBox.html">BBox</a> <a class="code" href="classTransform.html#ab432461b60446b78d3c91053fb44d85">Transform::operator()</a>(<span class="keyword">const</span> <a class="code" href="classBBox.html">BBox</a> &amp;b)<span class="keyword"> const </span>{
<a name="l00149"></a>00149         <span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &amp;<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a> = *<span class="keyword">this</span>;
<a name="l00150"></a>00150         <a class="code" href="classBBox.html">BBox</a> ret(       <a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00151"></a>00151         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00152"></a>00152         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00153"></a>00153         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00154"></a>00154         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00155"></a>00155         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00156"></a>00156         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#6efc252ac04a7236369d0ebdc11dab4c">pMin</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00157"></a>00157         ret = <a class="code" href="geometry_8cpp.html#b6b355a05ae9130aceaa5ed34f3eb75b">Union</a>(ret,<a class="code" href="util_8cpp.html#52037c938e3c1b126c6277da5ca689d0">M</a>(<a class="code" href="classPoint.html">Point</a>(b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#05dfe2dfbde813ad234b514f30e662f1">x</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#6101960c8d2d4e8ea1d32c9234bbeb8d">y</a>, b.<a class="code" href="classBBox.html#144894960e2a634983f4d579d7cfc02e">pMax</a>.<a class="code" href="classPoint.html#9a666531e0e99adff132be93d2407d0c">z</a>)));
<a name="l00158"></a>00158         <span class="keywordflow">return</span> ret;
<a name="l00159"></a>00159 }
<a name="l00160"></a><a class="code" href="classTransform.html#6b8ae9c022495016732b0dce0bbbbdf7">00160</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="classTransform.html#6b8ae9c022495016732b0dce0bbbbdf7">Transform::operator*</a>(<span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &amp;t2)<span class="keyword"> const </span>{
<a name="l00161"></a>00161         <a class="code" href="classReference.html">Reference&lt;Matrix4x4&gt;</a> m1 = <a class="code" href="structMatrix4x4.html#02afdc3204111b94a50e70cd6a89656a">Matrix4x4::Mul</a>(<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>, t2.<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>);
<a name="l00162"></a>00162         <a class="code" href="classReference.html">Reference&lt;Matrix4x4&gt;</a> m2 = <a class="code" href="structMatrix4x4.html#02afdc3204111b94a50e70cd6a89656a">Matrix4x4::Mul</a>(t2.<a class="code" href="classTransform.html#bc22f9bd5fc99dd23da65372fbeef7ab">mInv</a>, <a class="code" href="classTransform.html#bc22f9bd5fc99dd23da65372fbeef7ab">mInv</a>);
<a name="l00163"></a>00163         <span class="keywordflow">return</span> <a class="code" href="classTransform.html#a08ca4266efabc768973cdeea51945ab">Transform</a>(m1, m2);
<a name="l00164"></a>00164 }
<a name="l00165"></a><a class="code" href="classTransform.html#11804a097060d0c89b9e87b1594f139a">00165</a> <span class="keywordtype">bool</span> <a class="code" href="classTransform.html#11804a097060d0c89b9e87b1594f139a">Transform::SwapsHandedness</a>()<span class="keyword"> const </span>{
<a name="l00166"></a>00166         <span class="keywordtype">float</span> det = ((<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[0][0] *
<a name="l00167"></a>00167                   (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][1] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][2] -
<a name="l00168"></a>00168                    <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][2] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][1])) -
<a name="l00169"></a>00169                  (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[0][1] *
<a name="l00170"></a>00170                   (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][0] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][2] -
<a name="l00171"></a>00171                    <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][2] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][0])) +
<a name="l00172"></a>00172                  (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[0][2] *
<a name="l00173"></a>00173                   (<a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][0] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][1] -
<a name="l00174"></a>00174                    <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[1][1] * <a class="code" href="classTransform.html#2184e2d58808e70cc0a13c1758103c11">m</a>-&gt;m[2][0])));
<a name="l00175"></a>00175         <span class="keywordflow">return</span> det &lt; 0.f;
<a name="l00176"></a>00176 }
<a name="l00177"></a><a class="code" href="transform_8cpp.html#3d2897cdab5d1a698e02bcf7933e7d9a">00177</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#1ca894daa11d476d9e76947dceaf0255">COREDLL</a> <a class="code" href="pbrt_8h.html#afa5b6be57d705879eb446aa864fc0ad">Orthographic</a>(<span class="keywordtype">float</span> znear, <span class="keywordtype">float</span> zfar) {
<a name="l00178"></a>00178         <span class="keywordflow">return</span> <a class="code" href="pbrt_8h.html#f6b012272269020d52792d1ed65c7904">Scale</a>(1.f, 1.f, 1.f / (zfar-znear)) *
<a name="l00179"></a>00179                 <a class="code" href="pbrt_8h.html#dcfb331b19053e5b60008c68e78f7b81">Translate</a>(<a class="code" href="classVector.html">Vector</a>(0.f, 0.f, -znear));
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181 <a class="code" href="pbrt_8h.html#1ca894daa11d476d9e76947dceaf0255">COREDLL</a>
<a name="l00182"></a><a class="code" href="transform_8cpp.html#b84f45b217020849ea3adf68003e365d">00182</a> <a class="code" href="classTransform.html">Transform</a> <a class="code" href="pbrt_8h.html#b6306bd808488c136237a0dfe1cb57e5">Perspective</a>(<span class="keywordtype">float</span> fov, <span class="keywordtype">float</span> n, <span class="keywordtype">float</span> f) {
<a name="l00183"></a>00183         <span class="comment">// Perform projective divide</span>
<a name="l00184"></a>00184         <span class="keywordtype">float</span> inv_denom = 1.f/(f-n);
<a name="l00185"></a>00185         <a class="code" href="structMatrix4x4.html">Matrix4x4</a> *persp =
<a name="l00186"></a>00186             <span class="keyword">new</span> <a class="code" href="structMatrix4x4.html">Matrix4x4</a>(1, 0,       0,          0,
<a name="l00187"></a>00187                           0, 1,       0,          0,
<a name="l00188"></a>00188                           0, 0, f*inv_denom, -f*n*inv_denom,
<a name="l00189"></a>00189                           0, 0,       1,          0);
<a name="l00190"></a>00190         <span class="comment">// Scale to canonical viewing volume</span>
<a name="l00191"></a>00191         <span class="keywordtype">float</span> invTanAng = 1.f / tanf(<a class="code" href="pbrt_8h.html#12544670622d3fbc783e1cb4d56b3a23">Radians</a>(fov) / 2.f);
<a name="l00192"></a>00192         <span class="keywordflow">return</span> <a class="code" href="pbrt_8h.html#f6b012272269020d52792d1ed65c7904">Scale</a>(invTanAng, invTanAng, 1) *
<a name="l00193"></a>00193                <a class="code" href="classTransform.html#a08ca4266efabc768973cdeea51945ab">Transform</a>(persp);
<a name="l00194"></a>00194 }
</pre></div></div>
<hr size="1"><address style="text-align: right;"><small>Generated on Mon Jul 20 17:31:53 2009 for pbrt by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
</body>
</html>