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nux  3.0.0
Constants.cpp
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00001 /*
00002  * Copyright 2010-2012 Inalogic® Inc.
00003  *
00004  * This program is free software: you can redistribute it and/or modify it
00005  * under the terms of the GNU Lesser General Public License, as
00006  * published by the  Free Software Foundation; either version 2.1 or 3.0
00007  * of the License.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranties of
00011  * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
00012  * PURPOSE.  See the applicable version of the GNU Lesser General Public
00013  * License for more details.
00014  *
00015  * You should have received a copy of both the GNU Lesser General Public
00016  * License along with this program. If not, see <http://www.gnu.org/licenses/>
00017  *
00018  * Authored by: Jay Taoko <jaytaoko@inalogic.com>
00019  *
00020  */
00021 
00022 #include "../NuxCore.h"
00023 #include "Constants.h"
00024 
00025 #include <limits>
00026 namespace nux
00027 {
00028   namespace constants
00029   {
00030     const float pi       = 3.1415926535f;
00031     const float e        = 2.7182817f;
00032     const float sqrt2    = 1.414214f;
00033     const float sqrt3    = 1.732051f;
00034     const float golden   = 1.618034f;
00035 
00036     const double epsilon_milli  =   0.001;
00037     const double epsilon_micro  =   0.000001;
00038     const double epsilon_nano   =   0.000000001;
00039     const double epsilon_pico   =   0.000000000001;
00040     const double epsilon_femto  =   0.000000000000001;
00041 
00042 #if defined(NUX_OS_WINDOWS)
00043     const float flt_epsilon     = FLT_EPSILON;
00044     const double dbl_epsilon    = DBL_EPSILON;
00045 #elif defined(NUX_OS_LINUX)
00046     const float flt_epsilon     = __FLT_EPSILON__;
00047     const double dbl_epsilon    = __DBL_EPSILON__;
00048 #elif defined(NUX_OS_MACOSX)
00049     const float dbl_epsilon     = _FLT_EPSILON_;
00050     const double dbl_epsilon    = _DBL_EPSILON_;
00051 #else
00052 #error Undefined OS.
00053 #endif
00054 
00055   } // namespace constants
00056 }