00001 00002 /* 00003 pbrt source code Copyright(c) 1998-2010 Matt Pharr and Greg Humphreys. 00004 00005 This file is part of pbrt. 00006 00007 pbrt is free software; you can redistribute it and/or modify 00008 it under the terms of the GNU General Public License as published by 00009 the Free Software Foundation; either version 2 of the License, or 00010 (at your option) any later version. Note that the text contents of 00011 the book "Physically Based Rendering" are *not* licensed under the 00012 GNU GPL. 00013 00014 pbrt is distributed in the hope that it will be useful, 00015 but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 GNU General Public License for more details. 00018 00019 You should have received a copy of the GNU General Public License 00020 along with this program. If not, see <http://www.gnu.org/licenses/>. 00021 00022 */ 00023 00024 00025 // filters/sinc.cpp* 00026 #include "stdafx.h" 00027 #include "filters/sinc.h" 00028 #include "paramset.h" 00029 00030 // Sinc Filter Method Definitions 00031 float LanczosSincFilter::Evaluate(float x, float y) const { 00032 return Sinc1D(x * invXWidth) * Sinc1D(y * invYWidth); 00033 } 00034 00035 00036 LanczosSincFilter *CreateSincFilter(const ParamSet &ps) { 00037 float xw = ps.FindOneFloat("xwidth", 4.); 00038 float yw = ps.FindOneFloat("ywidth", 4.); 00039 float tau = ps.FindOneFloat("tau", 3.f); 00040 return new LanczosSincFilter(xw, yw, tau); 00041 } 00042 00043