quakeforge/ruamoko/include/math.h

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/*
math.h
Built-in math function definitions
Copyright (C) 2002 Bill Currie <taniwha@quakeforge.net>
Copyright (C) 2002 Jeff Teunissen <deek@quakeforge.net>
This file is part of the Ruamoko Standard Library.
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
#ifndef __ruamoko_math_h
#define __ruamoko_math_h
/**
Generate a random number such that 0 <= n <= 1 (0 to 1 inclusive)
*/
@extern float random (void);
/**
Returns the integer component of \a f
*/
@extern int ftoi (float f);
/**
Returns the float representation of \a i
*/
@extern float itof (int i);
/**
Rounds \a f to the nearest integer value and returns it. Does not change the type.
*/
@extern float rint (float f);
/**
Returns \a f, rounded down to the next lower integer
*/
@extern float floor (float f);
/**
Returns \a f, rounded up to the next highest integer
*/
@extern float ceil (float f);
/**
Returns the absolute value of \a f
*/
@extern float fabs (float f);
/****************************************************************************
* VECTORS *
****************************************************************************/
@extern vector v_forward, v_up, v_right;
/**
Transform vector \a v into a unit vector (a vector with a length of 1).
The direction is not changed, except for (possible) roundoff errors.
*/
@extern vector normalize (vector v);
/**
Return the length of vector \a v
*/
@extern float vlen (vector v);
/**
Returns the yaw angle ("bearing"), in degrees, associated with vector \a v.
*/
@extern float vectoyaw (vector v);
/**
Returns a vector 'pitch yaw 0' corresponding to vector \a v.
*/
@extern vector vectoangles (vector v);
/**
Returns the sine of \a x.
*/
@extern float sin (float x);
/**
Returns the cosine of \a x.
*/
@extern float cos (float x);
/**
Returns the tangent of \a x.
*/
@extern float tan (float x);
/**
Returns the arcsine of \a x.
*/
@extern float asin (float x);
/**
Returns the arccosine of \a x.
*/
@extern float acos (float x);
/**
Returns the arctangent of \a x.
*/
@extern float atan (float x);
@extern float atan2 (float y, float x);
/**
Returns the natural log of \a x.
*/
@extern float log (float x);
/**
Returns the base-10 log of \a x.
*/
@extern float log10 (float x);
/**
Returns \a x to the \a y power
*/
@extern float pow (float x, float y);
@extern float sinh (float x);
@extern float cosh (float x);
@extern float tanh (float x);
@extern float asinh (float x);
@extern float acosh (float x);
@extern float atanh (float x);
#endif //__ruamoko_math_h