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Merge branch 'slope_optimisations' into 'master'

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Optimisation of P_GetMobjGravity (relevant for slopes)

Cleaned up some performance issues in Skytop Zone (2.1.16: THE SUGOI UPDATE) arising from some inefficiencies with P_GetMobjGravity. FPS drops only occasionally to 34 now, which is a big improvement when I was frequently getting 27 in Salt's 15andahalf.exe.

(I also tested in a build of 2.1.16's first release candidate, and was getting drops to 16! So SOMETHING improved since then, but this was the major issue.)

See merge request !109
This commit is contained in:
Wolfy 2016-09-03 16:40:50 -04:00
commit 7f9accf38b
1 changed files with 25 additions and 38 deletions
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63
src/p_mobj.c
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@ -1278,25 +1278,23 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
for (rover = mo->subsector->sector->ffloors; rover; rover = rover->next)
{
if (!(rover->flags & FF_EXISTS))
if (!(rover->flags & FF_EXISTS) || !P_InsideANonSolidFFloor(mo, rover)) // P_InsideANonSolidFFloor checks for FF_EXISTS itself, but let's not always call this function
continue;
if (P_InsideANonSolidFFloor(mo, rover))
{
if ((rover->flags & (FF_SWIMMABLE|FF_GOOWATER)) == (FF_SWIMMABLE|FF_GOOWATER))
goopgravity = true;
if (rover->master->frontsector->gravity)
{
gravityadd = -FixedMul(gravity,
(FixedDiv(*rover->master->frontsector->gravity>>FRACBITS, 1000)));
if ((rover->flags & (FF_SWIMMABLE|FF_GOOWATER)) == (FF_SWIMMABLE|FF_GOOWATER))
goopgravity = true;
if (rover->master->frontsector->verticalflip && gravityadd > 0)
mo->eflags |= MFE_VERTICALFLIP;
if (!(rover->master->frontsector->gravity))
continue;
no3dfloorgrav = false;
break;
}
}
gravityadd = -FixedMul(gravity,
(FixedDiv(*rover->master->frontsector->gravity>>FRACBITS, 1000)));
if (rover->master->frontsector->verticalflip && gravityadd > 0)
mo->eflags |= MFE_VERTICALFLIP;
no3dfloorgrav = false;
break;
}
}
@ -1318,28 +1316,20 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
if (mo->player)
{
if (mo->player->charability == CA_FLY && (mo->player->powers[pw_tailsfly]
|| (mo->state >= &states[S_PLAY_SPC1] && mo->state <= &states[S_PLAY_SPC4])))
gravityadd = gravityadd/3; // less gravity while flying
if (mo->player->pflags & PF_GLIDING)
gravityadd = gravityadd/3; // less gravity while gliding
if (mo->player->climbing)
gravityadd = 0;
if (mo->player->pflags & PF_NIGHTSMODE)
if ((mo->player->pflags & PF_GLIDING)
|| (mo->player->charability == CA_FLY && (mo->player->powers[pw_tailsfly]
|| (mo->state >= &states[S_PLAY_SPC1] && mo->state <= &states[S_PLAY_SPC4]))))
gravityadd = gravityadd/3; // less gravity while flying/gliding
if (mo->player->climbing || (mo->player->pflags & PF_NIGHTSMODE))
gravityadd = 0;
if (!(mo->flags2 & MF2_OBJECTFLIP) != !(mo->player->powers[pw_gravityboots])) // negated to turn numeric into bool - would be double negated, but not needed if both would be
{
UINT8 bits = 0;
if (mo->flags2 & MF2_OBJECTFLIP)
bits ^= 1;
if (mo->player->powers[pw_gravityboots])
bits ^= 1;
if (bits & 1)
{
gravityadd = -gravityadd;
mo->eflags ^= MFE_VERTICALFLIP;
}
gravityadd = -gravityadd;
mo->eflags ^= MFE_VERTICALFLIP;
}
if (!!(mo->eflags & MFE_VERTICALFLIP) != wasflip)
P_PlayerFlip(mo);
}
else
{
@ -1347,10 +1337,10 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
if (mo->flags2 & MF2_OBJECTFLIP)
{
mo->eflags |= MFE_VERTICALFLIP;
if (gravityadd < 0) // Don't sink, only rise up
gravityadd *= -1;
if (mo->z + mo->height >= mo->ceilingz)
gravityadd = 0;
else if (gravityadd < 0) // Don't sink, only rise up
gravityadd *= -1;
}
else //Otherwise, sort through the other exceptions.
{
@ -1396,9 +1386,6 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
if (goopgravity)
gravityadd = -gravityadd/5;
if (mo->player && !!(mo->eflags & MFE_VERTICALFLIP) != wasflip)
P_PlayerFlip(mo);
gravityadd = FixedMul(gravityadd, mo->scale);
return gravityadd;