mirror of
https://github.com/OpenDriver2/REDRIVER2.git
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102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
#ifndef DR2MATH_H
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#define DR2MATH_H
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#include <abs.h>
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// Driver 2 math definitions
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extern short rcossin_tbl[8192];
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#define ONE 4096
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#define ONE_BITS 12
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#define PH_ONE 256
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#define PH_ONE_BITS 8
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// math constants
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#define FixHalfRound(x, bits) (((x) + (1 << (bits-1))) >> bits)
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#define FixFloorSigned(x, bits) ((x) / (1 << bits)) // in disassembly: ((int(x) < 0 ? int(x) + (1 << bits)-1 : int(x)) >> bits)
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#define FIXEDH(a) FixHalfRound(a, ONE_BITS) // Fixed Half Round number
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#define FIXED(a) ((a) >> ONE_BITS) // Fixed number (unsigned)
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#define RSIN(a) rcossin_tbl[(a & 0xFFFU) * 2]
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#define RCOS(a) rcossin_tbl[(a & 0xFFFU) * 2 + 1]
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// Remap a value in the range [A,B] to [C,D].
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#define RemapVal( val, A, B, C, D) \
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(C + (D - C) * (val - A) / (B - A))
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#define SetVec(_v, _x, _y, _z) \
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{ \
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(_v)->vx = _x; \
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(_v)->vy = _y; \
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(_v)->vz = _z; \
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}
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#define VecAdd(vecOut, vecLeft, vecRight) \
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{ \
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(vecOut)->vx = (vecLeft)->vx + (vecRight)->vx; \
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(vecOut)->vy = (vecLeft)->vy + (vecRight)->vy; \
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(vecOut)->vz = (vecLeft)->vz + (vecRight)->vz; \
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}
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#define VecSubtract(vecOut, vecLeft, vecRight) \
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{ \
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(vecOut)->vx = (vecLeft)->vx - (vecRight)->vx; \
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(vecOut)->vy = (vecLeft)->vy - (vecRight)->vy; \
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(vecOut)->vz = (vecLeft)->vz - (vecRight)->vz; \
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}
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#define VecAddEq(vecLeft, vecRight) \
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{ \
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(vecLeft)->vx += (vecRight)->vz; \
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(vecLeft)->vy += (vecRight)->vy; \
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(vecLeft)->vz += (vecRight)->vz; \
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}
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#define VecSubtractEq(vecLeft, vecRight) \
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{ \
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(vecLeft)->vx -= (vecRight)->vx; \
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(vecLeft)->vy -= (vecRight)->vy; \
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(vecLeft)->vz -= (vecRight)->vz; \
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}
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#define VecDivEq(vecLeft, vecRight) \
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{ \
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(vecLeft)->vx /= (vecRight)->vz; \
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(vecLeft)->vy /= (vecRight)->vy; \
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(vecLeft)->vz /= (vecRight)->vz; \
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}
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#define VecMulEq(vecLeft, vecRight) \
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{ \
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(vecLeft)->vx *= (vecRight)->vx; \
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(vecLeft)->vy *= (vecRight)->vy; \
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(vecLeft)->vz *= (vecRight)->vz; \
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}
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#define numberOf(sexToys) (sizeof(sexToys) / sizeof(sexToys[0]))
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#ifndef MIN
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#define MIN(a,b) fst_min(a,b)
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#endif
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#ifndef MAX
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#define MAX(a,b) fst_max(a,b)
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#endif
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inline int fst_min(int a, int b)
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{
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int diff = a - b;
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int dsgn = diff >> 31;
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return b + (diff & dsgn);
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}
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inline int fst_max(int a, int b)
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{
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int diff = a - b;
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int dsgn = diff >> 31;
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return a - (diff & dsgn);
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}
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#endif // DR2MATH_H
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