mirror of
https://github.com/scp-fs2open/fs2open.github.com.git
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taylor
b399461826
cleanup some debug messages so they can be turned off if needed get rid of extra strstr() check for thrusters since it should never get that far anyway page_in/page_out of model glows should be better now removed a bunch of unneeded casts and get type specific math functions right
152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/*
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* Copyright (C) Volition, Inc. 1999. All rights reserved.
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*
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* All source code herein is the property of Volition, Inc. You may not sell
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* or otherwise commercially exploit the source or things you created based on the
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* source.
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*
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*/
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/*
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* $Logfile: /Freespace2/code/Math/Floating.h $
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* $Revision: 2.2 $
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* $Date: 2005-03-24 23:36:13 $
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* $Author: taylor $
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*
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* Low-level floating point math macros and routines
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*
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* $Log: not supported by cvs2svn $
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* Revision 2.1 2004/08/11 05:06:27 Kazan
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* added preprocdefines.h to prevent what happened with fred -- make sure to make all fred2 headers include this file as the _first_ include -- i have already modified fs2 files to do this
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*
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* Revision 2.0 2002/06/03 04:02:24 penguin
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* Warpcore CVS sync
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*
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* Revision 1.1 2002/05/02 18:03:09 mharris
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* Initial checkin - converted filenames and includes to lower case
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*
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*
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* 4 4/07/99 6:22p Dave
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* Fred and Freespace support for multiple background bitmaps and suns.
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* Fixed link errors on all subprojects. Moved encrypt_init() to
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* cfile_init() and lcl_init(), since its safe to call twice.
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*
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* 3 11/05/98 4:18p Dave
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* First run nebula support. Beefed up localization a bit. Removed all
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* conditional compiles for foreign versions. Modified mission file
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* format.
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*
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* 2 10/07/98 10:53a Dave
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* Initial checkin.
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*
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* 1 10/07/98 10:49a Dave
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*
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* 13 2/26/98 3:28p John
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* Changed all sqrt's to use fl_sqrt. Took out isqrt function
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*
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* 12 1/26/98 10:43p Mike
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* Make ships not all zoom away from an impending shockwave at the same
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* time. Based on ai class and randomness
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*
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* 11 1/17/98 3:32p Mike
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* Add rand_range(), returns random float in min..max.
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*
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* 10 7/29/97 2:36p Hoffoss
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* Added header file required by _isnan().
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*
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* 9 7/29/97 2:35p Hoffoss
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* Added a NaN check macro.
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*
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* 8 2/17/97 5:18p John
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* Added a bunch of RCS headers to a bunch of old files that don't have
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* them.
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*
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* $NoKeywords: $
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*/
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#include "PreProcDefines.h"
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#ifndef _FLOATING_H
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#define _FLOATING_H
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#include <math.h>
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#include <float.h>
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extern float frand();
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extern int rand_chance(float frametime, float chance = 1.0f);
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float frand_range(float min, float max);
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// determine if a floating point number is NaN (Not a Number)
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#define fl_is_nan(fl) _isnan((double)(fl))
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// Handy macros to prevent type casting all over the place
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#define fl_sqrt(fl) sqrtf(fl)
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#define fl_isqrt(fl) (1.0f/sqrtf(fl))
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#define fl_abs(fl) fabsf(fl)
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#define i2fl(i) ((float)(i))
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#define fl2i(fl) ((int)(fl))
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#define flceil(fl) (int)ceil(fl)
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#define flfloor(fl) (int)floor(fl)
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#define f2fl(fx) ((float)(fx)/65536.0f)
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#define fl2f(fl) (int)((fl)*65536.0f)
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// convert a measurement in degrees to radians
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#define fl_radian(fl) ((float)((fl * 3.14159f)/180.0f))
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// convert a measurement in radians to degrees
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#define fl_degrees(fl) ((float)((fl * 180.0f)/3.14159))
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// use this instead of:
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// for: (int)floor(x+0.5f) use fl_round_2048(x)
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// (int)ceil(x-0.5f) use fl_round_2048(x)
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// (int)floor(x-0.5f) use fl_round_2048(x-1.0f)
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// (int)floor(x) use fl_round_2048(x-0.5f)
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// for values in the range -2048 to 2048
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// use this instead of:
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// for: (int)floor(x+0.5f) use fl_round_2048(x)
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// (int)ceil(x-0.5f) use fl_round_2048(x)
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// (int)floor(x-0.5f) use fl_round_2048(x-1.0f)
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// (int)floor(x) use fl_round_2048(x-0.5f)
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// for values in the range -2048 to 2048
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extern const float *p_fl_magic;
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inline int fl_round_2048( float x )
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{
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double tmp_quad;
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tmp_quad = x + *p_fl_magic;
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return *((int *)&tmp_quad);
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}
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/*
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inline float fl_sqrt( float x)
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{
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float retval;
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_asm fld x
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_asm fsqrt
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_asm fstp retval
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return retval;
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}
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float fl_isqrt( float x )
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{
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float retval;
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_asm fld x
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_asm fsqrt
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_asm fstp retval
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return 1.0f / retval;
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}
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*/
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// rounds off a floating point number to a multiple of some number
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extern float fl_roundoff(float x, int multiple);
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#endif
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