Source release of Wolfenstein 3D Classic Platinum for iOS, 1.1

wolf3d/code/env/mymath.h

@@ -0,0 +1,95 @@
+/*
+
+	Copyright (C) 2004-2005 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.
+
+*/
+
+/*
+ *	mymath.h: 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 __MYMATH_H__
+#define __MYMATH_H__
+
+
+
+typedef	int	fixed4_t;
+typedef	int	fixed8_t;
+typedef	int	fixed16_t;
+
+
+#define	PITCH	0	/* up / down */
+#define	YAW		1	/* left / right */
+#define	ROLL	2	/* fall over */
+
+
+#ifndef M_PI
+
+	#define M_PI	3.14159265358979323846f	// matches value in gcc v2 math.h
+
+#endif
+
+
+
+#ifndef ABS
+
+	#define ABS( x )	( (x) < 0 ? -(x) : (x) )
+
+#endif
+
+
+
+#define	nanmask ( 255 << 23 )
+
+#define	IS_NAN( x ) ( ( (*(int *) &x ) & nanmask ) == nanmask )
+
+
+
+/* Use RINT() instead of rint() */
+#ifdef __GNUC__
+
+	#define RINT( x ) rint( x )
+
+#else
+
+	#define RINT( x ) floor( (x) + 0.5 )
+
+#endif
+
+
+
+
+extern void MathLib_Init( void );
+
+extern int my_log2( int val );
+
+extern float (*pfSqrt)( float x );
+
+extern float CalcFov( float fov_x, float width, float height );
+
+
+
+#endif /* __MYMATH_H__ */
+