vcglib/vcg/math/base.h

/****************************************************************************
* VCGLib                                                            o o     *
* Visual and Computer Graphics Library                            o     o   *
*                                                                _   O  _   *
* Copyright(C) 2004                                                \/)\/    *
* Visual Computing Lab                                            /\/|      *
* ISTI - Italian National Research Council                           |      *
*                                                                    \      *
* All rights reserved.                                                      *
*                                                                           *
* This program is free software; you can redistribute it and/or modify      *   
* it under the terms of the GNU General Public License as published by      *
* the Free Software Foundation; either version 2 of the License, or         *
* (at your option) any later version.                                       *
*                                                                           *
* This program is distributed in the hope that it will be useful,           *
* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
* for more details.                                                         *
*                                                                           *
****************************************************************************/
/****************************************************************************
  History

$Log: not supported by cvs2svn $
Revision 1.3  2004/02/19 15:28:01  ponchio
*** empty log message ***

Revision 1.2  2004/02/13 02:18:57  cignoni
Edited Comments and GPL license


****************************************************************************/

#ifndef __VCGLIB_MATH_BASE
#define __VCGLIB_MATH_BASE

#include <math.h>
#include <assert.h>

  #ifdef __BORLANDC__
    float sqrtf (float v) {return sqrt(v);}
    float fabsf (float v) {return fabs(v);}
  #endif     

namespace vcg {
namespace math {

 template <class SCALAR> 
 class MagnitudoComparer
    {
      public:
	    inline bool operator() ( const SCALAR a, const SCALAR b ) { return fabs(a)>fabs(b);  }
    };
  

  float Sqrt(const float v)   { return sqrtf(v); }
  float Abs(const float v)   { return fabsf(v); }
  float Cos(const float v)   { return cosf(v); }
  float Sin(const float v)   { return sinf(v); }

  double Sqrt(const double v)   { return sqrt(v); }
  double Abs(const double v)   { return fabs(v); }
  double Cos(const double v)   { return cos(v); }
  double Sin(const double v)   { return sin(v); }
  
    
    
  template <class SCALAR> 
  class MaxVal
  {
  public:
  //const unsigned char   Math<unsigned char  >::MaxVal = 255;
  //const char	          Math<char 	        >::MaxVal = 127; 
  //const unsigned short	Math<unsigned short	>::MaxVal = 0xFFFFu; 
  //const short	          Math<short	        >::MaxVal = 0x7FFF; 
  //const float	          Math<float	        >::MaxVal = 3.4E38F; 
  //const int             Math<int            >::MaxVal = 2147483647; 
  //const long double     Math<long double    >::MaxVal = 1.2E308; 
  //const double          Math<double         >::MaxVal = 1.7E308; 
  //const __int64         Math<__int64        >::MaxVal = 9223372036854775807; 
  };
/* Some <math.h> files do not define M_PI... */
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

template <class SCALAR> 
inline SCALAR  Clamp( const SCALAR & val, const SCALAR& minval, const SCALAR& maxval)
{
	if(val < minval) return minval;
	if(val > maxval) return maxval;
	return val;
}



inline float   ToDeg(const float &a){return a*180.0f/float(M_PI);}
inline float   ToRad(const float &a){return float(M_PI)*a/180.0f;}
inline double  ToDeg(const double &a){return a*180.0/M_PI;}
inline double  ToRad(const double &a){return M_PI*a/180.0;}

}	// End namespace
}	// End namespace


#endif