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b6c749ffbd
Can't indent the .y files yet, they need special treatment. Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
157 lines
2.3 KiB
C
157 lines
2.3 KiB
C
/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* INCLUDES
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*
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*/
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#include <math.h>
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#include <stdio.h>
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#include "types.h"
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#include "mymath.h"
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#include "symbol.h"
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#define fix2double(i) ((double)(i/65536.0))
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#define double2fix(d) ((SLONG)(d*65536.0))
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#ifndef PI
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#define PI (acos(-1))
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#endif
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Define the _PI symbol
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*
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*/
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void math_DefinePI(void)
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{
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sym_AddEqu("_PI", double2fix(PI));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Print a fixed point value
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*
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*/
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void math_Print(SLONG i)
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{
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if (i >= 0)
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printf("%ld.%05ld", i >> 16,
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((SLONG) (fix2double(i) * 100000 + 0.5)) % 100000);
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else
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printf("-%ld.%05ld", (-i) >> 16,
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((SLONG) (fix2double(-i) * 100000 + 0.5)) % 100000);
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate sine
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*
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*/
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SLONG math_Sin(SLONG i)
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{
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return (double2fix(sin(fix2double(i) * 2 * PI / 65536)));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate cosine
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*
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*/
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SLONG math_Cos(SLONG i)
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{
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return (double2fix(cos(fix2double(i) * 2 * PI / 65536)));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate tangent
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*
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*/
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SLONG math_Tan(SLONG i)
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{
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return (double2fix(tan(fix2double(i) * 2 * PI / 65536)));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate sine^-1
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*
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*/
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SLONG math_ASin(SLONG i)
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{
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return (double2fix(asin(fix2double(i)) / 2 / PI * 65536));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate cosine^-1
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*
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*/
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SLONG math_ACos(SLONG i)
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{
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return (double2fix(acos(fix2double(i)) / 2 / PI * 65536));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate tangent^-1
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*
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*/
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SLONG math_ATan(SLONG i)
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{
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return (double2fix(atan(fix2double(i)) / 2 / PI * 65536));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Calculate atan2
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*
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*/
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SLONG math_ATan2(SLONG i, SLONG j)
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{
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return (double2fix
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(atan2(fix2double(i), fix2double(j)) / 2 / PI * 65536));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Multiplication
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*
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*/
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SLONG math_Mul(SLONG i, SLONG j)
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{
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return (double2fix(fix2double(i) * fix2double(j)));
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}
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/*
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* RGBAsm - MATH.C (Fixedpoint math routines)
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*
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* Division
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*
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*/
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SLONG math_Div(SLONG i, SLONG j)
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{
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return (double2fix(fix2double(i) / fix2double(j)));
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}
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