Source release of Wolfenstein 3D Classic Platinum for iOS, 1.0

wolf3d/newCode/env/angle.h

@@ -0,0 +1,53 @@
+/*
+
+	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__ */