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- misc math stuff

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This commit is contained in:
Ilya Shurumov 2020-12-09 15:50:50 +06:00
parent 38972cd5a3
commit 3f236b7630
1 changed files with 3 additions and 10 deletions
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13
src_rebuild/GAME/DR2MATH.H
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@ -4,6 +4,7 @@
#include "ABS.H"
// Driver 2 math definitions
extern short rcossin_tbl[8192];
#define ONE 4096
#define ONE_BITS 12
@ -12,22 +13,14 @@
#define PH_ONE_BITS 8
// math constants
#if 0
// DO NOT USE IT unless you don't care about replays and chases
#define FIXED(a) (int(a) / ONE)
#define HFIXED(a) (int(a) / (ONE*2))
#define PH_FIXED(a) (int(a) / (PH_ONE))
#else
#define FixHalfRound(x, bits) (((x) + (1 << (bits-1))) >> bits)
#define FixFloorSigned(x, bits) ((x) / (1 << bits)) // in disassembly: ((int(x) < 0 ? int(x) + (1 << bits)-1 : int(x)) >> bits)
#define FIXEDH(a) FixHalfRound(a, ONE_BITS) // Fixed Half Round number
#define FIXED(a) ((a) >> ONE_BITS) // Fixed number (unsigned)
#endif
#define RSIN(a) rcossin_tbl[(a & 0xFFFU) * 2]
#define RCOS(a) rcossin_tbl[(a & 0xFFFU) * 2 + 1]
#define SetVec(_v, _x, _y, _z) \
{ \