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<h1>camera.cpp</h1><a href="camera_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">// camera.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="camera_8h.html">camera.h</a>"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="film_8h.html">film.h</a>"</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="mc_8h.html">mc.h</a>"</span>
<a name="l00029"></a>00029 <span class="comment">// Camera Method Definitions</span>
<a name="l00030"></a><a class="code" href="classCamera.html#d1897942d0ccf91052386388a497349f">00030</a> <a class="code" href="classCamera.html#d1897942d0ccf91052386388a497349f">Camera::~Camera</a>() {
<a name="l00031"></a>00031 <span class="keyword">delete</span> <a class="code" href="classCamera.html#a1b701af2d6b0e2cff382ed173e4a20a">film</a>;
<a name="l00032"></a>00032 }
<a name="l00033"></a><a class="code" href="classCamera.html#8d99a3756d201a1487b8eb8e21dc7621">00033</a> <a class="code" href="classCamera.html#8d99a3756d201a1487b8eb8e21dc7621">Camera::Camera</a>(<span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &world2cam,
<a name="l00034"></a>00034 <span class="keywordtype">float</span> hither, <span class="keywordtype">float</span> yon,
<a name="l00035"></a>00035 <span class="keywordtype">float</span> sopen, <span class="keywordtype">float</span> sclose, <a class="code" href="classFilm.html">Film</a> *f) {
<a name="l00036"></a>00036 <a class="code" href="classCamera.html#cb957365b5a4773f16f78f0cab0127b0">WorldToCamera</a> = world2cam;
<a name="l00037"></a>00037 <a class="code" href="classCamera.html#e1b3ad505d20080729260283e6008b2e">CameraToWorld</a> = <a class="code" href="classCamera.html#cb957365b5a4773f16f78f0cab0127b0">WorldToCamera</a>.<a class="code" href="classTransform.html#ced6cc3fb16b20846fcee5aaf6432f49">GetInverse</a>();
<a name="l00038"></a>00038 <a class="code" href="classCamera.html#26ba51506b026c42c13b1c1ce15d8305">ClipHither</a> = hither;
<a name="l00039"></a>00039 <a class="code" href="classCamera.html#a7ce0cb7fb54f5dbfb8fce2a63613d78">ClipYon</a> = yon;
<a name="l00040"></a>00040 <a class="code" href="classCamera.html#b845952bba832f3d28e85c6c1095288c">ShutterOpen</a> = sopen;
<a name="l00041"></a>00041 <a class="code" href="classCamera.html#3d7d26840cc59e219d85b24449d80d70">ShutterClose</a> = sclose;
<a name="l00042"></a>00042 <a class="code" href="classCamera.html#a1b701af2d6b0e2cff382ed173e4a20a">film</a> = f;
<a name="l00043"></a>00043 <span class="keywordflow">if</span> (<a class="code" href="classCamera.html#cb957365b5a4773f16f78f0cab0127b0">WorldToCamera</a>.<a class="code" href="classTransform.html#8ef54fec2a1579988b13ae1b850fa6fd">HasScale</a>())
<a name="l00044"></a>00044 <a class="code" href="pbrt_8h.html#79abc2e750c4774bd9d433ad4f6e440a">Warning</a>(<span class="stringliteral">"Scaling detected in world-to-camera transformation!\n"</span>
<a name="l00045"></a>00045 <span class="stringliteral">"The system has numerous assumptions, implicit and explicit,\n"</span>
<a name="l00046"></a>00046 <span class="stringliteral">"that this transform will have no scale factors in it.\n"</span>
<a name="l00047"></a>00047 <span class="stringliteral">"Proceed at your own risk; your image may have errors or\n"</span>
<a name="l00048"></a>00048 <span class="stringliteral">"the system may crash as a result of this."</span>);
<a name="l00049"></a>00049 }
<a name="l00050"></a><a class="code" href="classProjectiveCamera.html#3f82b55dd37dab37e5bee291235c6e91">00050</a> <a class="code" href="classProjectiveCamera.html#3f82b55dd37dab37e5bee291235c6e91">ProjectiveCamera::ProjectiveCamera</a>(<span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &w2c,
<a name="l00051"></a>00051 <span class="keyword">const</span> <a class="code" href="classTransform.html">Transform</a> &proj, <span class="keyword">const</span> <span class="keywordtype">float</span> Screen[4],
<a name="l00052"></a>00052 <span class="keywordtype">float</span> hither, <span class="keywordtype">float</span> yon, <span class="keywordtype">float</span> sopen,
<a name="l00053"></a>00053 <span class="keywordtype">float</span> sclose, <span class="keywordtype">float</span> lensr, <span class="keywordtype">float</span> focald, <a class="code" href="classFilm.html">Film</a> *f)
<a name="l00054"></a>00054 : <a class="code" href="classCamera.html">Camera</a>(w2c, hither, yon, sopen, sclose, f) {
<a name="l00055"></a>00055 <span class="comment">// Initialize depth of field parameters</span>
<a name="l00056"></a>00056 <a class="code" href="classProjectiveCamera.html#61ec2c2a2afa3f86c313b0058a724582">LensRadius</a> = lensr;
<a name="l00057"></a>00057 <a class="code" href="classProjectiveCamera.html#e72e2701b478962e49bf33e72d156ccd">FocalDistance</a> = focald;
<a name="l00058"></a>00058 <span class="comment">// Compute projective camera transformations</span>
<a name="l00059"></a>00059 <a class="code" href="classProjectiveCamera.html#a5530c89d8913e27a2343fd7b123237a">CameraToScreen</a> = proj;
<a name="l00060"></a>00060 <a class="code" href="classProjectiveCamera.html#1e722b916fc5a6a4e451e97dd767b4a9">WorldToScreen</a> = <a class="code" href="classProjectiveCamera.html#a5530c89d8913e27a2343fd7b123237a">CameraToScreen</a> * <a class="code" href="classCamera.html#cb957365b5a4773f16f78f0cab0127b0">WorldToCamera</a>;
<a name="l00061"></a>00061 <span class="comment">// Compute projective camera screen transformations</span>
<a name="l00062"></a>00062 <a class="code" href="classProjectiveCamera.html#613d2ea790d3d791446009d068419348">ScreenToRaster</a> = <a class="code" href="pbrt_8h.html#f6b012272269020d52792d1ed65c7904">Scale</a>(<span class="keywordtype">float</span>(<a class="code" href="classCamera.html#a1b701af2d6b0e2cff382ed173e4a20a">film</a>-><a class="code" href="classFilm.html#2a6768612de9b5c940ce90edf74e51e4">xResolution</a>),
<a name="l00063"></a>00063 <span class="keywordtype">float</span>(<a class="code" href="classCamera.html#a1b701af2d6b0e2cff382ed173e4a20a">film</a>-><a class="code" href="classFilm.html#063949abe489b632809617887e32a87c">yResolution</a>), 1.f) *
<a name="l00064"></a>00064 <a class="code" href="pbrt_8h.html#f6b012272269020d52792d1ed65c7904">Scale</a>(1.f / (Screen[1] - Screen[0]),
<a name="l00065"></a>00065 1.f / (Screen[2] - Screen[3]), 1.f) *
<a name="l00066"></a>00066 <a class="code" href="pbrt_8h.html#dcfb331b19053e5b60008c68e78f7b81">Translate</a>(<a class="code" href="classVector.html">Vector</a>(-Screen[0], -Screen[3], 0.f));
<a name="l00067"></a>00067 <a class="code" href="classProjectiveCamera.html#17b594490a558f68cc0de401969af0e1">RasterToScreen</a> = <a class="code" href="classProjectiveCamera.html#613d2ea790d3d791446009d068419348">ScreenToRaster</a>.<a class="code" href="classTransform.html#ced6cc3fb16b20846fcee5aaf6432f49">GetInverse</a>();
<a name="l00068"></a>00068 <a class="code" href="classProjectiveCamera.html#4cdee8d3b004ec9f9fc9d3770a3ab7a1">RasterToCamera</a> =
<a name="l00069"></a>00069 <a class="code" href="classProjectiveCamera.html#a5530c89d8913e27a2343fd7b123237a">CameraToScreen</a>.<a class="code" href="classTransform.html#ced6cc3fb16b20846fcee5aaf6432f49">GetInverse</a>() * <a class="code" href="classProjectiveCamera.html#17b594490a558f68cc0de401969af0e1">RasterToScreen</a>;
<a name="l00070"></a>00070 }
</pre></div></div>
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