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- /*
- Copyright (C) 2005 Michael Liebscher <johnnycanuck@users.sourceforge.net>
- Copyright (C) 1997-2001 Id Software, Inc.
- 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 for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- /*
- * angle.h: Angle math routines.
- *
- * Author: Michael Liebscher <johnnycanuck@users.sourceforge.net>
- *
- * Acknowledgement:
- * Portion of this code was derived from Quake II, and was originally
- * written by Id Software, Inc.
- *
- */
- #ifndef __ANGLE_H__
- #define __ANGLE_H__
- #define DEG2RAD( a ) ( (a) * 0.01745329251994329576f ) // a * M_PI / 180.0f
- #define RAD2DEG( a ) ( (int)((a) / 0.01745329251994329576f) ) // a * 180.0f / M_PI
- #define ANGLE2SHORT( x ) ( (int)((x) * 65536 / 360) & 65535 )
- #define SHORT2ANGLE( x ) ( (x) * (360.0 / 65536) )
- extern float angle_diff( float angle1, float angle2 );
- extern float angle_wise( float angle1, float angle2 );
- extern float interpolate_angle( float from, float to, float fraction );
- extern float normalize_angle( float angle );
- extern float LerpAngle( float from, float to, float frac );
- #endif /* __ANGLE_H__ */
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