51 lines
1.6 KiB
C
51 lines
1.6 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 trig.h
|
|
* * \brief Interface to trig lookup tables
|
|
*/
|
|
#ifndef _trig_h
|
|
#define _trig_h
|
|
|
|
/* The number of units around a full circle */
|
|
#define TRIG_DEGREES 360
|
|
|
|
/* conversion macros */
|
|
#define DEG_TO_RAD(x) (x * M_PI / 180.0)
|
|
#define RAD_TO_DEG(x) (x * 180.0 / M_PI)
|
|
|
|
/* Initialise the Trig tables */
|
|
extern BOOL trigInitialise(void);
|
|
|
|
/* Shutdown the trig tables */
|
|
extern void trigShutDown(void);
|
|
|
|
/* Lookup trig functions */
|
|
// These can be assumed const, since they only rely on memory setup on startup
|
|
extern float trigSin(int angle) WZ_DECL_CONST;
|
|
extern float trigCos(int angle) WZ_DECL_CONST;
|
|
extern float trigInvSin(float val) WZ_DECL_CONST;
|
|
extern float trigInvCos(float val) WZ_DECL_CONST;
|
|
|
|
/* Supposedly fast lookup sqrt - unfortunately it's probably slower than the FPU sqrt :-( */
|
|
extern float trigIntSqrt(unsigned int val);
|
|
|
|
#endif
|
|
|