00001 /*************************************************************************** 00002 * Copyright (C) 1998-2007 by authors (see AUTHORS.txt ) * 00003 * * 00004 * This file is part of Lux Renderer. * 00005 * * 00006 * Lux Renderer is free software; you can redistribute it and/or modify * 00007 * it under the terms of the GNU General Public License as published by * 00008 * the Free Software Foundation; either version 3 of the License, or * 00009 * (at your option) any later version. * 00010 * * 00011 * Lux Renderer is distributed in the hope that it will be useful, * 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00014 * GNU General Public License for more details. * 00015 * * 00016 * You should have received a copy of the GNU General Public License * 00017 * along with this program. If not, see <http://www.gnu.org/licenses/>. * 00018 * * 00019 * This project is based on PBRT ; see http://www.pbrt.org * 00020 * Lux Renderer website : http://www.luxrender.org * 00021 ***************************************************************************/ 00022 00023 // spd.cpp* 00024 #include "spd.h" 00025 #include "memory.h" 00026 00027 using namespace lux; 00028 00029 void SPD::AllocateSamples(int n) { 00030 // Allocate memory for samples 00031 samples = (float *) 00032 AllocAligned(n * sizeof(float)); 00033 } 00034 00035 void SPD::Normalize() { 00036 float max = 0.f; 00037 00038 for(int i=0; i<nSamples; i++) 00039 if(samples[i] > max) 00040 max = samples[i]; 00041 00042 float scale = 1.f/max; 00043 00044 for(int i=0; i<nSamples; i++) 00045 samples[i] *= scale; 00046 } 00047 00048 void SPD::Clamp() { 00049 for(int i=0; i<nSamples; i++) { 00050 if(samples[i] < 0.f) samples[i] = 0.f; 00051 if(samples[i] > INFINITY) samples[i] = INFINITY; 00052 } 00053 } 00054 00055 void SPD::Scale(float s) { 00056 for(int i=0; i<nSamples; i++) 00057 samples[i] *= s; 00058 } 00059