warzone2100/lib/framework/math-help.h

48 lines
1.5 KiB
C

/*
This file is part of Warzone 2100.
Copyright (C) 1999-2004 Eidos Interactive
Copyright (C) 2005-2007 Warzone Resurrection Project
Warzone 2100 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.
Warzone 2100 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 for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*! \file math-help.h
* \brief Routines to provide simple math helper functions
*/
// Also PERCENT(int,int); // returns a int value 0->100 of the percentage of the first param over the second
#ifndef __INCLUDED_LIB_FRAMEWORK_MATH_HELP_H__
#define __INCLUDED_LIB_FRAMEWORK_MATH_HELP_H__
#define PERCENT(a,b) (((a)*100)/(b))
#define PERNUM(range,a,b) (((a)*range)/(b))
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
#if !defined(WZ_C99) && !(defined(__cplusplus) && defined(WZ_CC_GNU))
static inline int roundf(float x)
{
// Ensure that float truncation results in a proper rounding
if (x < 0.0f)
return x - 0.5f;
else
return x + 0.5f;
}
#endif
#endif // __INCLUDED_LIB_FRAMEWORK_MATH_HELP_H__