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- define new function calcSinTableValue() to calculate an equivalent sintable[] entry.

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* Returns a true double result.
* Also supports fractional input for fractional input. That is, if `sintable[1]` = 50 and `sintable[2]` = 100, `calcSinTableValue(1.5)` = 75.
* Increased precision of `BANG2RAD` define to use double and not float.
* As such, revert addition of `sintablef[]`.
This commit is contained in:
Mitchell Richters 2020-08-02 22:08:35 +10:00 committed by Christoph Oelckers
parent abb23a7bd0
commit 9c8593018b
3 changed files with 29 additions and 27 deletions
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3
source/build/include/build.h
View file

@ -370,7 +370,6 @@ static inline int32_t BGetTime(void) { return (int32_t) totalclock; }
EXTERN int32_t numframes, randomseed; EXTERN int32_t numframes, randomseed;
EXTERN int16_t sintable[2048]; EXTERN int16_t sintable[2048];
EXTERN double sintablef[2048];
EXTERN int16_t numshades; EXTERN int16_t numshades;
EXTERN uint8_t paletteloaded; EXTERN uint8_t paletteloaded;
@ -939,6 +938,8 @@ int32_t videoSetRenderMode(int32_t renderer);
void renderSetRollAngle(float rolla); void renderSetRollAngle(float rolla);
#endif #endif
double calcSinTableValue(double index);
// pal: pass -1 to invalidate all palettes for the tile, or >=0 for a particular palette // pal: pass -1 to invalidate all palettes for the tile, or >=0 for a particular palette
// how: pass -1 to invalidate all instances of the tile in texture memory, or a bitfield // how: pass -1 to invalidate all instances of the tile in texture memory, or a bitfield
// bit 0: opaque or masked (non-translucent) texture, using repeating // bit 0: opaque or masked (non-translucent) texture, using repeating

19
source/build/src/engine.cpp
View file

@ -588,20 +588,11 @@ static int32_t engineLoadTables(void)
reciptable[i] = divscale30(2048, i+2048); reciptable[i] = divscale30(2048, i+2048);
for (i=0; i<=512; i++) for (i=0; i<=512; i++)
{
sintable[i] = (int16_t)(16384.f * sinf((float)i * BANG2RAD) + 0.0001f); sintable[i] = (int16_t)(16384.f * sinf((float)i * BANG2RAD) + 0.0001f);
sintablef[i] = 16384. * sin(BANG2RAD * i);
}
for (i=513; i<1024; i++) for (i=513; i<1024; i++)
{
sintable[i] = sintable[1024-i]; sintable[i] = sintable[1024-i];
sintablef[i] = sintablef[1024-i];
}
for (i=1024; i<2048; i++) for (i=1024; i<2048; i++)
{
sintable[i] = -sintable[i-1024]; sintable[i] = -sintable[i-1024];
sintablef[i] = -sintablef[i-1024];
}
for (i=0; i<640; i++) for (i=0; i<640; i++)
radarang[i] = (int16_t)(atanf(((float)(640-i)-0.5f) * (1.f/160.f)) * (-64.f * (1.f/BANG2RAD)) + 0.0001f); radarang[i] = (int16_t)(atanf(((float)(640-i)-0.5f) * (1.f/160.f)) * (-64.f * (1.f/BANG2RAD)) + 0.0001f);
@ -4331,3 +4322,13 @@ void renderSetRollAngle(float rolla)
gtang = rolla * (fPI * (1.f/1024.f)); gtang = rolla * (fPI * (1.f/1024.f));
} }
#endif #endif
//
// Calculates and returns a sintable[] value of the equivilent index (and supports fractional indexes also)
//
double calcSinTableValue(double index)
{
double value = fabs(16384. * sin(BANG2RAD * (index - (fmod(index, 512) * 2))));
return (index >= 1024 ? -value : value);
}

34
source/games/duke/src/hudweapon_d.cpp
View file

@ -72,7 +72,7 @@ void displayloogie(short snum)
{ {
a = abs(sintable[((ps[snum].loogcnt + i) << 5) & 2047]) >> 5; a = abs(sintable[((ps[snum].loogcnt + i) << 5) & 2047]) >> 5;
z = 4096 + ((ps[snum].loogcnt + i) << 9); z = 4096 + ((ps[snum].loogcnt + i) << 9);
x = (-getavel(snum)) + (sintablef[((ps[snum].loogcnt + i) << 6) & 2047] / 1024.); x = (-getavel(snum)) + (calcSinTableValue(((ps[snum].loogcnt + i) << 6) & 2047) / 1024.);
hud_drawsprite( hud_drawsprite(
(ps[snum].loogiex[i] + x), (200 + ps[snum].loogiey[i] - y), z - (i << 8), 256 - a, (ps[snum].loogiex[i] + x), (200 + ps[snum].loogiey[i] - y), z - (i << 8), 256 - a,
@ -103,7 +103,7 @@ int animatefist(int gs, int snum)
fistzoom = 90612L; fistzoom = 90612L;
if (fistzoom < 40920) if (fistzoom < 40920)
fistzoom = 40290; fistzoom = 40290;
fistz = 194 + (sintablef[((6 + fisti) << 7) & 2047] / 512.); fistz = 194 + (calcSinTableValue(((6 + fisti) << 7) & 2047) / 512.);
if (sprite[ps[snum].i].pal == 1) if (sprite[ps[snum].i].pal == 1)
fistpal = 1; fistpal = 1;
@ -303,11 +303,11 @@ void displayweapon_d(int snum, double smoothratio)
gun_pos = 80-(p->weapon_pos*p->weapon_pos); gun_pos = 80-(p->weapon_pos*p->weapon_pos);
weapon_xoffset = (160)-90; weapon_xoffset = (160)-90;
weapon_xoffset -= (sintablef[((xs_CRoundToInt(weapon_sway)>>1)+512)&2047] / (1024. + 512.)); weapon_xoffset -= calcSinTableValue(fmod((weapon_sway / 2.) + 512, 2048)) / (1024. + 512.);
weapon_xoffset -= 58 + p->weapon_ang; weapon_xoffset -= 58 + p->weapon_ang;
if( sprite[p->i].xrepeat < 32 ) if( sprite[p->i].xrepeat < 32 )
gun_pos -= fabs(sintablef[(xs_CRoundToInt(weapon_sway)<<2)&2047] / 512.); gun_pos -= fabs(calcSinTableValue(fmod(weapon_sway * 4., 2048)) / 512.);
else gun_pos -= fabs(sintablef[(xs_CRoundToInt(weapon_sway)>>1)&2047] / 1024.); else gun_pos -= fabs(calcSinTableValue(fmod(weapon_sway / 2., 2048)) / 1024.);
gun_pos -= (p->hard_landing<<3); gun_pos -= (p->hard_landing<<3);
@ -367,14 +367,14 @@ void displayweapon_d(int snum, double smoothratio)
fistsign += i >> 1; fistsign += i >> 1;
} }
cw = weapon_xoffset; cw = weapon_xoffset;
weapon_xoffset += sintablef[(fistsign) & 2047] / 1024.; weapon_xoffset += calcSinTableValue(fistsign & 2047) / 1024.;
hud_draw(weapon_xoffset + 250 - (p->q16look_ang / (2. * FRACUNIT)), hud_draw(weapon_xoffset + 250 - (p->q16look_ang / (2. * FRACUNIT)),
looking_arc + 258 - (fabs(sintablef[(fistsign) & 2047] / 256.)), looking_arc + 258 - (fabs(calcSinTableValue(fistsign & 2047) / 256.)),
FIST, gs, o); FIST, gs, o);
weapon_xoffset = cw; weapon_xoffset = cw;
weapon_xoffset -= sintablef[(fistsign) & 2047] / 1024.; weapon_xoffset -= calcSinTableValue(fistsign & 2047) / 1024.;
hud_draw(weapon_xoffset + 40 - (p->q16look_ang / (2. * FRACUNIT)), hud_draw(weapon_xoffset + 40 - (p->q16look_ang / (2. * FRACUNIT)),
looking_arc + 200 + (fabs(sintablef[(fistsign) & 2047] / 256.)), looking_arc + 200 + (fabs(calcSinTableValue(fistsign & 2047) / 256.)),
FIST, gs, o | 4); FIST, gs, o | 4);
} }
else else
@ -458,8 +458,8 @@ void displayweapon_d(int snum, double smoothratio)
pal = 1; pal = 1;
else pal = sector[p->cursectnum].floorpal; else pal = sector[p->cursectnum].floorpal;
weapon_xoffset -= sintablef[(768 + (p->kickback_pic << 7)) & 2047] / 2048.; weapon_xoffset -= calcSinTableValue((768 + (p->kickback_pic << 7)) & 2047) / 2048.;
gun_pos += sintablef[(768 + (p->kickback_pic << 7) & 2047)] / 2048.; gun_pos += calcSinTableValue((768 + (p->kickback_pic << 7)) & 2047) / 2048.;
if (*kb > 0) if (*kb > 0)
{ {
@ -510,7 +510,7 @@ void displayweapon_d(int snum, double smoothratio)
if (*kb > 0) if (*kb > 0)
{ {
gun_pos -= sintablef[p->kickback_pic << 7] / 4096.; gun_pos -= calcSinTableValue(p->kickback_pic << 7) / 4096.;
} }
if (*kb > 0 && sprite[p->i].pal != 1) if (*kb > 0 && sprite[p->i].pal != 1)
@ -655,7 +655,7 @@ void displayweapon_d(int snum, double smoothratio)
pal = sector[p->cursectnum].floorpal; pal = sector[p->cursectnum].floorpal;
if (*kb > 0) if (*kb > 0)
gun_pos -= sintablef[p->kickback_pic << 7] / 4096.; gun_pos -= calcSinTableValue(p->kickback_pic << 7) / 4096.;
if (*kb > 0 && sprite[p->i].pal != 1) weapon_xoffset += 1 - (rand() & 3); if (*kb > 0 && sprite[p->i].pal != 1) weapon_xoffset += 1 - (rand() & 3);
@ -768,7 +768,7 @@ void displayweapon_d(int snum, double smoothratio)
pal = sector[p->cursectnum].floorpal; pal = sector[p->cursectnum].floorpal;
if (*kb > 0) if (*kb > 0)
gun_pos -= sintablef[p->kickback_pic << 7] / 4096.; gun_pos -= calcSinTableValue(p->kickback_pic << 7) / 4096.;
if (*kb > 0 && sprite[p->i].pal != 1) weapon_xoffset += 1 - (rand() & 3); if (*kb > 0 && sprite[p->i].pal != 1) weapon_xoffset += 1 - (rand() & 3);
@ -1125,7 +1125,7 @@ void displayweapon_d(int snum, double smoothratio)
hud_drawpal(weapon_xoffset + 184 - (p->q16look_ang / (2. * FRACUNIT)), hud_drawpal(weapon_xoffset + 184 - (p->q16look_ang / (2. * FRACUNIT)),
looking_arc + 240 - gun_pos, SHRINKER + 2, looking_arc + 240 - gun_pos, SHRINKER + 2,
16 - (sintablef[p->random_club_frame & 2047] / 1024.), 16 - (calcSinTableValue(p->random_club_frame & 2047) / 1024.),
o, 0); o, 0);
hud_drawpal(weapon_xoffset + 188 - (p->q16look_ang / (2. * FRACUNIT)), hud_drawpal(weapon_xoffset + 188 - (p->q16look_ang / (2. * FRACUNIT)),
@ -1282,7 +1282,7 @@ void displayweapon_d(int snum, double smoothratio)
{ {
hud_drawpal(weapon_xoffset + 184 - (p->q16look_ang / (2. * FRACUNIT)), hud_drawpal(weapon_xoffset + 184 - (p->q16look_ang / (2. * FRACUNIT)),
looking_arc + 240 - gun_pos, SHRINKER + 2, looking_arc + 240 - gun_pos, SHRINKER + 2,
16 - (sintablef[p->random_club_frame & 2047] / 1024.), 16 - (calcSinTableValue(p->random_club_frame & 2047) / 1024.),
o, 2); o, 2);
hud_drawpal(weapon_xoffset + 188 - (p->q16look_ang / (2. * FRACUNIT)), hud_drawpal(weapon_xoffset + 188 - (p->q16look_ang / (2. * FRACUNIT)),
@ -1292,7 +1292,7 @@ void displayweapon_d(int snum, double smoothratio)
{ {
hud_drawpal(weapon_xoffset + 184 - (p->q16look_ang / (2. * FRACUNIT)), hud_drawpal(weapon_xoffset + 184 - (p->q16look_ang / (2. * FRACUNIT)),
looking_arc + 240 - gun_pos, SHRINKER + 2, looking_arc + 240 - gun_pos, SHRINKER + 2,
16 - (sintablef[p->random_club_frame & 2047] / 1024.), 16 - (calcSinTableValue(p->random_club_frame & 2047) / 1024.),
o, 0); o, 0);
hud_drawpal(weapon_xoffset + 188 - (p->q16look_ang / (2. * FRACUNIT)), hud_drawpal(weapon_xoffset + 188 - (p->q16look_ang / (2. * FRACUNIT)),