188 lines
7.5 KiB
C++
188 lines
7.5 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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Revision 1.13 2004/03/31 10:09:19 cignoni
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int64 -> long long for GCC compatibility
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Revision 1.12 2004/03/16 00:23:50 tarini
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- added VoidType - added "static_assert"
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Revision 1.11 2004/03/10 17:37:54 tarini
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Added Atan2.
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Added common utilities: Max, Min, Swap, Sort(a,b), Sort(a,b,c).
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Changed Max values syntax. example: Value<float>::Max
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Revision 1.10 2004/03/10 16:54:57 tarini
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Added Atan2.
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Added common utilities: Max, Min, Swap, Sort(a,b), Sort(a,b,c).
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Changed Max values syntax. example: Value<float>::Max
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Revision 1.7 2004/03/08 19:38:29 tarini
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Added Min e Max. usage: Min<float>::Value (tarini)
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Revision 1.6 2004/03/08 14:49:37 ponchio
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Aggiunti un po di inline davanti alle funzioni
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Revision 1.5 2004/03/04 00:21:00 ponchio
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added Acos e Asin
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Revision 1.4 2004/03/03 22:51:49 cignoni
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changed math from class to template
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Revision 1.2 2004/02/13 02:18:57 cignoni
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Edited Comments and GPL license
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****************************************************************************/
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#ifndef __VCGLIB_MATH_BASE
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#define __VCGLIB_MATH_BASE
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#include <math.h>
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#include <assert.h>
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#include <limits.h>
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/// static_assert: implemented as a macro for "assert", but it is separated for clarity.
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/// Should be used for checking integrity constraints that can be tested at complile time,
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/// as the ones involving templated constants in templated classes.
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#define static_assert assert
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#ifdef __BORLANDC__
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float sqrtf (float v) {return sqrt(v);}
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float fabsf (float v) {return fabs(v);}
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#endif
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namespace vcg {
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namespace math {
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template <class SCALAR>
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class MagnitudoComparer
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{
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public:
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inline bool operator() ( const SCALAR a, const SCALAR b ) { return fabs(a)>fabs(b); }
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};
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inline float Sqrt(const float v) { return sqrtf(v); }
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inline float Abs(const float v) { return fabsf(v); }
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inline float Cos(const float v) { return cosf(v); }
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inline float Sin(const float v) { return sinf(v); }
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inline float Acos(const float v) { return acosf(v); }
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inline float Asin(const float v) { return asinf(v); }
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inline float Atan2(const float v0,const float v1) { return atan2f(v0,v1); }
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inline double Sqrt(const double v) { return sqrt(v); }
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inline double Abs(const double v) { return fabs(v); }
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inline double Cos(const double v) { return cos(v); }
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inline double Sin(const double v) { return sin(v); }
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inline double Acos(const double v) { return acos(v); }
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inline double Asin(const double v) { return asin(v); }
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inline double Atan2(const double v0,const double v1) { return atan2(v0,v1); }
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/// max and min values for each scalar type
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/// syntax: Max<float>::Value
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template <class SCALAR> class Value {
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public: const SCALAR Min; const SCALAR Max;
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};
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class Value<char > { public: const char Min=-128;
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const char Max=+127;};
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class Value<unsigned char > { public: const unsigned char Min=0;
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const unsigned char Max=255;};
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class Value<short > { public: const short Min=(-32767 -1);
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const short Max=+32767;};
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class Value<unsigned short> { public: const unsigned short Min=0;
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const unsigned short Max=65535;};
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class Value<int > { public: const int Min=(-2147483647 - 1);
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const int Max= +2147483647;};
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class Value<unsigned int > { public: const unsigned int Min=0;
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const unsigned int Max=4294967295;};
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class Value<__int64 > { public: const __int64 Min=(-9223372036854775807i64 - 1);
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const __int64 Max= +9223372036854775807i64;};
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class Value<long > { public: const long Min=(-2147483647L -1L);
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const long Max= +2147483647L;};
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class Value<unsigned long > { public: const unsigned long Min=0;
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const unsigned long Max=4294967295;};
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class Value<float > { public: const float Min=-3.4E38F;
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const float Max=+3.4E38F;};
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class Value<double > { public: const double Min=-1.7E308;;
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const double Max=+1.7E308;};
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class Value<long double > { public: const long double Min=-1.7E308; //-1.2E4931 ?
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const long double Max=+1.7E308;};//+1.2E4931 ?
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template<class T> inline const T & Min(const T &a, const T &b){
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if (a<b) return a; else return b;
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};
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template<class T> inline const T & Max(const T &a, const T &b){
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if (a<b) return b; else return a;
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};
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template<class T> inline void Swap(T &a, T &b){
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T tmp=a; a=b; b=tmp;
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};
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template<class T> inline void Sort(T &a, T &b){
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if (a>b) Swap(a,b);
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};
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template<class T> inline void Sort(T &a, T &b, T &c){
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if (a>b) Swap(a,b);
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if (b>c) {Swap(b,c); if (a>b) Swap(a,b);}
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};
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/* Some <math.h> files do not define M_PI... */
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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template <class SCALAR>
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inline SCALAR Clamp( const SCALAR & val, const SCALAR& minval, const SCALAR& maxval)
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{
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if(val < minval) return minval;
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if(val > maxval) return maxval;
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return val;
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}
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inline float ToDeg(const float &a){return a*180.0f/float(M_PI);}
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inline float ToRad(const float &a){return float(M_PI)*a/180.0f;}
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inline double ToDeg(const double &a){return a*180.0/M_PI;}
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inline double ToRad(const double &a){return M_PI*a/180.0;}
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} // End math namespace
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/// a type that stands for "void". Useful for Parameter type of a point.
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class VoidType{ public:
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VoidType(){};
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};
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} // End vcg namespace
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#endif
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