mirror of
https://git.do.srb2.org/KartKrew/Kart-Public.git
synced 2024-11-10 07:12:03 +00:00
365 lines
8 KiB
C
365 lines
8 KiB
C
/*
|
|
* anglechk.c
|
|
*
|
|
* Copyright 2007 Alam Arias <Alam.GBC@gmail.com>
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#ifdef _MSC_VER
|
|
#include <assert.h>
|
|
#endif
|
|
#define NOASM
|
|
#include "../src/tables.h"
|
|
#define NO_M
|
|
#include "../src/m_fixed.c"
|
|
#define FIXEDPOINTCONV
|
|
|
|
// With angle_t,
|
|
// 360 deg = 2^32
|
|
// 45 deg = 2^29
|
|
// 1 deg = 2^29 / 45
|
|
// To convert an angle to a fixed-point number of degrees, then, use
|
|
// fixed = angle * FRACUNIT / ((1<<29) / 45)
|
|
// But, done literally like that, this will overflow.
|
|
// It's mathematically equivalent to
|
|
// fixed = angle * (1<<FRACBITS) / (1<<29) * 45
|
|
// fixed = 45 * angle * (1<<(FRACBITS-29))
|
|
// fixed = 45 * angle * (1>>(29-FRACBITS))
|
|
// fixed = (angle>>(29-FRACBITS)) * 45
|
|
|
|
#define ANGLE_TO_FIXED(a) (fixed_t)(((a)>>(29-FRACBITS))*45)
|
|
#define FIXED_TO_ANGLE(x) (angle_t)(((x)/45)<<(29-FRACBITS))
|
|
|
|
/*
|
|
Old code that failed if FRACBITS was not 16.
|
|
In particular, the use of FRACUNIT in the definition of ANGLE_F is completely
|
|
wrong. The value wanted actually happens to be 65536 due to the definition
|
|
of angle_t (it's specified so that 360 degrees = 2^32, to take advantage of
|
|
modular arithmetic). That 65536 has nothing whatsoever to do with the setting
|
|
of FRACUNIT.
|
|
|
|
#define ANGF_D 8192
|
|
#define ANGF_N 45
|
|
#define ANGLE_F (ANGF_N*FRACUNIT/ANGF_D)
|
|
#define FIXED_TO_ANGLE(x) (angle_t)FixedDiv(x, ANGLE_F) // angle_t = FixedDiv(fixed_t, ANGLE_F)
|
|
#define ANGLE_TO_FIXED(x) FixedMul((fixed_t)(x), ANGLE_F) // fixed_t = FixedMul(angle_t, ANGLE_F)
|
|
*/
|
|
|
|
static fixed_t AngleFixed204(angle_t af)
|
|
{
|
|
const fixed_t cfn = 180*FRACUNIT;
|
|
if (af == 0)
|
|
return 0;
|
|
else if (af > ANGLE_180)
|
|
return cfn + ANGLE_TO_FIXED(af - ANGLE_180);
|
|
else if (af < ANGLE_180)
|
|
return ANGLE_TO_FIXED(af);
|
|
else return cfn;
|
|
}
|
|
|
|
static inline angle_t FixedAngleC204(fixed_t fa, fixed_t factor)
|
|
{
|
|
#if 0 //FixedMod off?
|
|
const boolean neqda = da < 0, neqfa = fa < 0;
|
|
const fixed_t afactor = abs(factor);
|
|
angle_t ra = ANGLE_180;
|
|
|
|
if (factor == 0)
|
|
return FixedAngle204(fa);
|
|
else if (fa == 0)
|
|
return 0;
|
|
|
|
if (neqfactor)
|
|
{
|
|
const fixed_t maf = FixedDiv(afactor, ANGLE_F);
|
|
const fixed_t cfn = FixedMul(360*FRACUNIT, afactor), hcfn = (cfn/2);
|
|
const fixed_t fam = FixedMod(fa, cfn);
|
|
|
|
if (fam > hcfn)
|
|
ra = ANGLE_180 + (angle_t)FixedMul(fam - hcfn, maf);
|
|
else if (fam < hcfn)
|
|
ra = (angle_t)FixedMul(fam, maf);
|
|
}
|
|
else
|
|
{
|
|
const fixed_t maf = FixedMul(afactor, ANGLE_F);
|
|
const fixed_t cfn = FixedDiv(360*FRACUNIT, afactor), hcfn = (cfn/2);
|
|
const fixed_t fam = FixedMod(fa, cfn);
|
|
|
|
if (fam > hcfn)
|
|
ra = ANGLE_180 + (angle_t)FixedDiv(fam - hcfn, maf);
|
|
else if (fam < hcfn)
|
|
ra = (angle_t)FixedDiv(fam, maf);
|
|
}
|
|
|
|
if (neqfa)
|
|
ra = ANGLE_MAX-ra;
|
|
|
|
return ra;
|
|
#else
|
|
if (factor == 0)
|
|
return FixedAngle(fa);
|
|
else if (factor > 0)
|
|
return (angle_t)((FIXED_TO_FLOAT(fa)/FIXED_TO_FLOAT(factor))*(ANGLE_45/45));
|
|
else
|
|
return (angle_t)((FIXED_TO_FLOAT(fa)*FIXED_TO_FLOAT(-factor))*(ANGLE_45/45));
|
|
#endif
|
|
}
|
|
|
|
angle_t FixedAngle(fixed_t fa)
|
|
{
|
|
#if 0 //FixedMod off?
|
|
const boolean neqfa = fa < 0;
|
|
const fixed_t cfn = 180*FRACUNIT;
|
|
const fixed_t fam = FixedMod(fa, 360*FRACUNIT);
|
|
angle_t ra = ANGLE_180;
|
|
|
|
if (fa == 0)
|
|
return 0;
|
|
|
|
if (fam > cfn)
|
|
ra = ANGLE_180+FIXED_TO_ANGLE(fam-cfn);
|
|
else if (fam < cfn)
|
|
ra = FIXED_TO_ANGLE(fam);
|
|
|
|
if (neqfa)
|
|
ra = ANGLE_MAX-ra;
|
|
|
|
return ra;
|
|
#else
|
|
return (angle_t)(FIXED_TO_FLOAT(fa)*(ANGLE_45/45));
|
|
#endif
|
|
}
|
|
|
|
fixed_t AngleFixed205(angle_t af)
|
|
{
|
|
#ifdef FIXEDPOINTCONV
|
|
angle_t wa = ANGLE_180;
|
|
fixed_t wf = 180*FRACUNIT;
|
|
fixed_t rf = 0*FRACUNIT;
|
|
//const angle_t adj = 0x2000;
|
|
|
|
//if (af < adj) // too small to notice
|
|
//return rf;
|
|
|
|
while (af)
|
|
{
|
|
while (af < wa)
|
|
{
|
|
wa /= 2;
|
|
wf /= 2;
|
|
}
|
|
rf += wf;
|
|
af -= wa;
|
|
}
|
|
|
|
return rf;
|
|
#else
|
|
const fixed_t cfn = 180*FRACUNIT;
|
|
if (af == 0)
|
|
return 0;
|
|
else if (af > ANGLE_180)
|
|
return cfn + ANGLE_TO_FIXED(af - ANGLE_180);
|
|
else if (af < ANGLE_180)
|
|
return ANGLE_TO_FIXED(af);
|
|
else return cfn;
|
|
#endif
|
|
}
|
|
|
|
#ifdef FIXEDPOINTCONV
|
|
static FUNCMATH angle_t AngleAdj(const fixed_t fa, const fixed_t wf,
|
|
angle_t ra)
|
|
{
|
|
const angle_t adj = 0x77;
|
|
const boolean fan = fa < 0;
|
|
const fixed_t sl = FixedDiv(fa, wf*2);
|
|
const fixed_t lb = FixedRem(fa, wf*2);
|
|
const fixed_t lo = (wf*2)-lb;
|
|
|
|
if (ra == 0)
|
|
{
|
|
if (lb == 0)
|
|
{
|
|
ra = FixedMul(FRACUNIT/512, sl);
|
|
if (ra > FRACUNIT/64)
|
|
return ANGLE_MAX-ra+1;
|
|
return ra;
|
|
}
|
|
else if (lb > 0)
|
|
return ANGLE_MAX-FixedMul(lo*FRACUNIT, adj)+1;
|
|
else
|
|
return ANGLE_MAX-FixedMul(lo*FRACUNIT, adj)+1;
|
|
}
|
|
|
|
if (fan)
|
|
return ANGLE_MAX-ra+1;
|
|
else
|
|
return ra;
|
|
}
|
|
#endif
|
|
|
|
angle_t FixedAngleC205(fixed_t fa, fixed_t factor)
|
|
{
|
|
#ifdef FIXEDPOINTCONV
|
|
angle_t wa = ANGLE_180;
|
|
fixed_t wf = 180*FRACUNIT;
|
|
angle_t ra = 0;
|
|
const fixed_t cfa = fa;
|
|
fixed_t cwf = wf;
|
|
|
|
if (fa == 0)
|
|
return 0;
|
|
|
|
if (factor == 0)
|
|
return FixedAngle(fa);
|
|
else if (factor > 0)
|
|
cwf = wf = FixedMul(wf, factor);
|
|
else if (factor < 0)
|
|
cwf = wf = FixedDiv(wf, -factor);
|
|
|
|
fa = abs(fa);
|
|
|
|
while (fa)
|
|
{
|
|
while (fa < wf)
|
|
{
|
|
wa /= 2;
|
|
wf /= 2;
|
|
}
|
|
ra = ra + wa;
|
|
fa = fa - wf;
|
|
}
|
|
|
|
return AngleAdj(cfa, cwf, ra);
|
|
#else
|
|
if (factor == 0)
|
|
return FixedAngle(fa);
|
|
|
|
//fa = FixedMod(fa, 360*FRACUNIT);
|
|
|
|
if (factor > 0)
|
|
return (angle_t)((FIXED_TO_FLOAT(fa)/FIXED_TO_FLOAT(factor))*(ANGLE_45/45));
|
|
else
|
|
return (angle_t)((FIXED_TO_FLOAT(fa)*FIXED_TO_FLOAT(-factor))*(ANGLE_45/45));
|
|
#endif
|
|
}
|
|
|
|
angle_t FixedAngle205(fixed_t fa)
|
|
{
|
|
#ifdef FIXEDPOINTCONV
|
|
angle_t wa = ANGLE_180;
|
|
fixed_t wf = 180*FRACUNIT;
|
|
angle_t ra = 0;
|
|
const fixed_t cfa = fa;
|
|
const fixed_t cwf = wf;
|
|
|
|
if (fa == 0)
|
|
return 0;
|
|
|
|
fa = abs(fa);
|
|
|
|
while (fa)
|
|
{
|
|
while (fa < wf)
|
|
{
|
|
wa /= 2;
|
|
wf /= 2;
|
|
}
|
|
ra = ra + wa;
|
|
fa = fa - wf;
|
|
}
|
|
|
|
return AngleAdj(cfa, cwf, ra);
|
|
#else
|
|
//fa = FixedMod(fa, 360*FRACUNIT);
|
|
|
|
if (fa == 0)
|
|
return 0;
|
|
|
|
return (angle_t)(FIXED_TO_FLOAT(fa)*(ANGLE_45/45));
|
|
#endif
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
fixed_t f, f204, f205;
|
|
INT64 a;
|
|
angle_t a204, a205;
|
|
fixed_t CF = 40*FRACUNIT;
|
|
int err = 0;
|
|
(void)argc;
|
|
(void)argv;
|
|
|
|
err = 0x29; //41
|
|
|
|
if (1)
|
|
for (a = 0; a < ANGLE_MAX; a += 0x1)
|
|
{
|
|
f204 = AngleFixed204((angle_t)a);
|
|
f205 = AngleFixed205((angle_t)a);
|
|
if (f204 != f205 && (abs(f204-f205) > err || f204 == 0 || f205 == 0))
|
|
{
|
|
printf("Angle: %u, %d, %d, %d\n", (angle_t)a, f204, f205, f204-f205);
|
|
//err = abs(f204-f205);
|
|
}
|
|
}
|
|
|
|
//err = FixedDiv(FRACUNIT, 120*FRACUNIT); // 547
|
|
err = FixedDiv(FRACUNIT, 62*FRACUNIT); //1059
|
|
|
|
if (1)
|
|
for (f = FRACUNIT*-720; f < FRACUNIT*720; f += 1)
|
|
{
|
|
a204 = FixedAngle(f);
|
|
a205 = FixedAngle205(f);
|
|
if (a204 != a205 && (abs(a204-a205) > err || a204 == 0 || a205 == 0))
|
|
{
|
|
printf("Fixed: %f, %u, %u, %d\n", FIXED_TO_FLOAT(f), a204, a205, a204-a205);
|
|
err = abs(a204-a205);
|
|
}
|
|
}
|
|
|
|
//err = FixedDiv(FRACUNIT, 316*FRACUNIT); //207
|
|
err = FixedDiv(FRACUNIT, 125*FRACUNIT); //526
|
|
|
|
if (1)
|
|
for (f = FixedMul(FRACUNIT*-720, CF); f < FixedMul(FRACUNIT*720, CF); f += FRACUNIT/16)
|
|
{
|
|
a204 = FixedAngleC204(f, CF);
|
|
a205 = FixedAngleC205(f, CF);
|
|
if (a204 != a205 && (abs(a204-a205) > err || a204 == 0 || a205 == 0))
|
|
{
|
|
printf("FixedC: %f, %u, %u, %d\n", FIXED_TO_FLOAT(f), a204, a205, a204-a205);
|
|
//err = abs(a204-a205);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *cpu_cpy(void *dest, const void *src, size_t n)
|
|
{
|
|
return memcpy(dest, src, n);
|
|
}
|
|
|
|
void *(*M_Memcpy)(void* dest, const void* src, size_t n) = cpu_cpy;
|
|
|
|
void I_Error(const char *error, ...)
|
|
{
|
|
(void)error;
|
|
exit(-1);
|
|
}
|