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raze/source/games/blood/src/prediction.cpp

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//-------------------------------------------------------------------------
/*
Copyright (C) 2010-2019 EDuke32 developers and contributors
Copyright (C) 2019 Nuke.YKT
This file is part of NBlood.
NBlood is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
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 "ns.h" // Must come before everything else!
#include <stdlib.h>
#include <string.h>
#include "compat.h"
#include "build.h"
#include "v_font.h"
#include "blood.h"
#include "choke.h"
#include "zstring.h"
#include "razemenu.h"
#include "gstrings.h"
#include "v_2ddrawer.h"
#include "v_video.h"
#include "v_font.h"
BEGIN_BLD_NS
void fakePlayerProcess(PLAYER* pPlayer, InputPacket* pInput);
void fakeActProcessSprites(void);
bool gPrediction = true;
VIEW predict, predictOld;
static VIEW predictFifo[256];
void viewInitializePrediction(void)
{
predict.angle = gMe->angle.ang;
predict.horiz = gMe->horizon.horiz;
predict.horizoff = gMe->horizon.horizoff;
predict.at2c = gMe->slope;
predict.at6f = gMe->cantJump;
predict.at70 = gMe->isRunning;
predict.at72 = gMe->isUnderwater;
predict.at71 = !!(gMe->input.actions & SB_JUMP);
predict.x = gMe->pSprite->x;
predict.y = gMe->pSprite->y;
predict.z = gMe->pSprite->z;
predict.sectnum = gMe->pSprite->sectnum;
predict.at73 = gMe->pSprite->flags;
predict.xvel = xvel[gMe->pSprite->index];
predict.yvel = yvel[gMe->pSprite->index];
predict.zvel = zvel[gMe->pSprite->index];
predict.floordist = gMe->pXSprite->height;
predict.at48 = gMe->posture;
predict.spin = gMe->angle.spin;
predict.at6e = !!(gMe->input.actions & SB_CENTERVIEW);
memcpy(&predict.at75,&gSpriteHit[gMe->pSprite->extra],sizeof(SPRITEHIT));
predict.bobPhase = gMe->bobPhase;
predict.Kills = gMe->bobAmp;
predict.bobHeight = gMe->bobHeight;
predict.bobWidth = gMe->bobWidth;
predict.at10 = gMe->swayPhase;
predict.at14 = gMe->swayAmp;
predict.shakeBobY = gMe->swayHeight;
predict.shakeBobX = gMe->swayWidth;
predict.weaponZ = gMe->zWeapon-gMe->zView-(12<<8);
predict.viewz = gMe->zView;
predict.at3c = gMe->zViewVel;
predict.at40 = gMe->zWeapon;
predict.at44 = gMe->zWeaponVel;
predictOld = predict;
}
void viewUpdatePrediction(InputPacket *pInput)
{
predictOld = predict;
short bakCstat = gMe->pSprite->cstat;
gMe->pSprite->cstat = 0;
fakePlayerProcess(gMe, pInput);
fakeActProcessSprites();
gMe->pSprite->cstat = bakCstat;
//predictFifo[gPredictTail&255] = predict;
//gPredictTail++;
}
static void sub_158B4(PLAYER *pPlayer)
{
predict.viewz = predict.z - pPlayer->pPosture[pPlayer->lifeMode][predict.at48].eyeAboveZ;
predict.at40 = predict.z - pPlayer->pPosture[pPlayer->lifeMode][predict.at48].weaponAboveZ;
}
static void fakeProcessInput(PLAYER *pPlayer, InputPacket *pInput)
{
POSTURE *pPosture = &pPlayer->pPosture[pPlayer->lifeMode][predict.at48];
predict.at70 = !!(gMe->input.actions & SB_RUN);
predict.at71 = !!(gMe->input.actions & SB_JUMP);
if (predict.at48 == 1)
{
int x = Cos(predict.angle.asbuild());
int y = Sin(predict.angle.asbuild());
if (pInput->fvel)
{
int forward = pInput->fvel;
if (forward > 0)
forward = MulScale(pPosture->frontAccel, forward, 8);
else
forward = MulScale(pPosture->backAccel, forward, 8);
predict.xvel += MulScale(forward, x, 30);
predict.yvel += MulScale(forward, y, 30);
}
if (pInput->svel)
{
int strafe = pInput->svel;
strafe = MulScale(pPosture->sideAccel, strafe, 8);
predict.xvel += MulScale(strafe, y, 30);
predict.yvel -= MulScale(strafe, x, 30);
}
}
else if (predict.floordist < 0x100)
{
int speed = 0x10000;
if (predict.floordist > 0)
speed -= DivScale(predict.floordist, 0x100, 16);
int x = Cos(predict.angle.asbuild());
int y = Sin(predict.angle.asbuild());
if (pInput->fvel)
{
int forward = pInput->fvel;
if (forward > 0)
forward = MulScale(pPosture->frontAccel, forward, 8);
else
forward = MulScale(pPosture->backAccel, forward, 8);
if (predict.floordist)
forward = MulScale(forward, speed, 16);
predict.xvel += MulScale(forward, x, 30);
predict.yvel += MulScale(forward, y, 30);
}
if (pInput->svel)
{
int strafe = pInput->svel;
strafe = MulScale(pPosture->sideAccel, strafe, 8);
if (predict.floordist)
strafe = MulScale(strafe, speed, 16);
predict.xvel += MulScale(strafe, y, 30);
predict.yvel -= MulScale(strafe, x, 30);
}
}
if (pInput->avel)
predict.angle = degang(pInput->avel);
if (pInput->actions & SB_TURNAROUND)
if (!predict.spin)
predict.spin = -1024;
if (predict.spin < 0)
{
int speed;
if (predict.at48 == 1)
speed = 64;
else
speed = 128;
predict.spin = min(int(predict.spin) + speed, 0);
predict.angle += buildang(speed);
}
if (!predict.at71)
predict.at6f = 0;
switch (predict.at48)
{
case 1:
if (predict.at71)
predict.zvel -= pPosture->normalJumpZ;//0x5b05;
if (pInput->actions & SB_CROUCH)
predict.zvel += pPosture->normalJumpZ;//0x5b05;
break;
case 2:
if (!(pInput->actions & SB_CROUCH))
predict.at48 = 0;
break;
default:
if (!predict.at6f && predict.at71 && predict.floordist == 0) {
if (packItemActive(pPlayer, 4)) predict.zvel = pPosture->pwupJumpZ;//-0x175555;
else predict.zvel = pPosture->normalJumpZ;//-0xbaaaa;
predict.at6f = 1;
}
if (pInput->actions & SB_CROUCH)
predict.at48 = 2;
break;
}
#if 0
if (predict.at6e && !(pInput->actions & (SB_LOOK_UP | SB_LOOK_DOWN)))
{
if (predict.at20 < 0)
predict.at20 = min(predict.at20+IntToFixed(4), 0);
if (predict.at20 > 0)
predict.at20 = max(predict.at20-IntToFixed(4), 0);
if (predict.at20 == 0)
predict.at6e = 0;
}
else
{
if (pInput->actions & SB_LOOK_UP)
predict.at20 = min(predict.at20+IntToFixed(4), IntToFixed(60));
if (pInput->actions & SB_LOOK_DOWN)
predict.at20 = max(predict.at20-IntToFixed(4), IntToFixed(-60));
}
predict.at20 = clamp(predict.at20+pInput->horz, IntToFixed(-60), IntToFixed(60));
if (predict.at20 > 0)
predict.at24 = FloatToFixed(MulScaleF(120., bsinf(FixedToFloat(predict.at20) * 8., 16)), 30);
else if (predict.at20 < 0)
predict.at24 = FloatToFixed(MulScaleF(180., bsinf(FixedToFloat(predict.at20) * 8., 16)), 30);
else
predict.at24 = 0;
#endif
int nSector = predict.sectnum;
int florhit = predict.at75.florhit & 0xc000;
char va;
if (predict.floordist < 16 && (florhit == 0x4000 || florhit == 0))
va = 1;
else
va = 0;
if (va && (sector[nSector].floorstat&2) != 0)
{
int z1 = getflorzofslope(nSector, predict.x, predict.y);
int x2 = predict.x+MulScale(64, Cos(predict.angle.asbuild()), 30);
int y2 = predict.y+MulScale(64, Sin(predict.angle.asbuild()), 30);
short nSector2 = nSector;
updatesector(x2, y2, &nSector2);
if (nSector2 == nSector)
{
int z2 = getflorzofslope(nSector2, x2, y2);
predict.horizoff = q16horiz(interpolatedvalue(predict.horizoff.asq16(), IntToFixed(z1 - z2) >> 3, 0x4000));
}
}
else
{
predict.horizoff = q16horiz(interpolatedvalue(predict.horizoff.asq16(), 0, 0x4000));
if (abs(predict.horizoff.asq16()) < 4)
predict.horizoff = q16horiz(0);
}
predict.at2c = -predict.horiz.asq16() >> 9;
}
void fakePlayerProcess(PLAYER *pPlayer, InputPacket *pInput)
{
spritetype *pSprite = pPlayer->pSprite;
XSPRITE *pXSprite = pPlayer->pXSprite;
POSTURE* pPosture = &pPlayer->pPosture[pPlayer->lifeMode][predict.at48];
int top, bottom;
GetSpriteExtents(pSprite, &top, &bottom);
top += predict.z-pSprite->z;
bottom += predict.z-pSprite->z;
int dzb = (bottom-predict.z)/4;
int dzt = (predict.z-top)/4;
int dw = pSprite->clipdist<<2;
short nSector = predict.sectnum;
if (!gNoClip)
{
pushmove_old((int32_t*)&predict.x, (int32_t*)&predict.y, (int32_t*)&predict.z, &predict.sectnum, dw, dzt, dzb, CLIPMASK0);
if (predict.sectnum == -1)
predict.sectnum = nSector;
}
fakeProcessInput(pPlayer, pInput);
int nSpeed = approxDist(predict.xvel, predict.yvel);
predict.at3c = interpolatedvalue(predict.at3c, predict.zvel, 0x7000);
int dz = predict.z-pPosture->eyeAboveZ-predict.viewz;
if (dz > 0)
predict.at3c += MulScale(dz<<8, 0xa000, 16);
else
predict.at3c += MulScale(dz<<8, 0x1800, 16);
predict.viewz += predict.at3c>>8;
predict.at44 = interpolatedvalue(predict.at44, predict.zvel, 0x5000);
dz = predict.z-pPosture->weaponAboveZ-predict.at40;
if (dz > 0)
predict.at44 += MulScale(dz<<8, 0x8000, 16);
else
predict.at44 += MulScale(dz<<8, 0xc00, 16);
predict.at40 += predict.at44>>8;
predict.weaponZ = predict.at40 - predict.viewz - (12<<8);
predict.bobPhase = ClipLow(predict.bobPhase-4, 0);
nSpeed >>= FRACBITS;
if (predict.at48 == 1)
{
predict.Kills = (predict.Kills+17)&2047;
predict.at14 = (predict.at14+17)&2047;
predict.bobHeight = MulScale(10*pPosture->bobV,Sin(predict.Kills*2), 30);
predict.bobWidth = MulScale(predict.bobPhase*pPosture->bobH,Sin(predict.Kills-256), 30);
predict.shakeBobY = MulScale(predict.bobPhase*pPosture->swayV,Sin(predict.at14*2), 30);
predict.shakeBobX = MulScale(predict.bobPhase*pPosture->swayH,Sin(predict.at14-0x155), 30);
}
else
{
if (pXSprite->height < 256)
{
predict.Kills = (predict.Kills+(pPosture->pace[predict.at70]*4))&2047;
predict.at14 = (predict.at14+(pPosture->pace[predict.at70]*4)/2)&2047;
if (predict.at70)
{
if (predict.bobPhase < 60)
predict.bobPhase = ClipHigh(predict.bobPhase + nSpeed, 60);
}
else
{
if (predict.bobPhase < 30)
predict.bobPhase = ClipHigh(predict.bobPhase + nSpeed, 30);
}
}
predict.bobHeight = MulScale(predict.bobPhase*pPosture->bobV,Sin(predict.Kills*2), 30);
predict.bobWidth = MulScale(predict.bobPhase*pPosture->bobH,Sin(predict.Kills-256), 30);
predict.shakeBobY = MulScale(predict.bobPhase*pPosture->swayV,Sin(predict.at14*2), 30);
predict.shakeBobX = MulScale(predict.bobPhase*pPosture->swayH,Sin(predict.at14-0x155), 30);
}
if (!pXSprite->health)
return;
predict.at72 = 0;
if (predict.at48 == 1)
{
predict.at72 = 1;
int nSector = predict.sectnum;
int nLink = gLowerLink[nSector];
if (nLink > 0 && (sprite[nLink].type == kMarkerLowGoo || sprite[nLink].type == kMarkerLowWater))
{
if (getceilzofslope(nSector, predict.x, predict.y) > predict.viewz)
predict.at72 = 0;
}
}
}
static void fakeMoveDude(spritetype *pSprite)
{
PLAYER *pPlayer = NULL;
int bottom, top;
if (IsPlayerSprite(pSprite))
pPlayer = &gPlayer[pSprite->type-kDudePlayer1];
assert(pSprite->type >= kDudeBase && pSprite->type < kDudeMax);
GetSpriteExtents(pSprite, &top, &bottom);
top += predict.z - pSprite->z;
bottom += predict.z - pSprite->z;
int bz = (bottom-predict.z)/4;
int tz = (predict.z-top)/4;
int wd = pSprite->clipdist*4;
int nSector = predict.sectnum;
assert(nSector >= 0 && nSector < kMaxSectors);
if (predict.xvel || predict.yvel)
{
if (pPlayer && gNoClip)
{
predict.x += predict.xvel>>12;
predict.y += predict.yvel>>12;
if (!FindSector(predict.x, predict.y, &nSector))
nSector = predict.sectnum;
}
else
{
short bakCstat = pSprite->cstat;
pSprite->cstat &= ~257;
predict.at75.hit = ClipMove(&predict.x, &predict.y, &predict.z, &nSector, predict.xvel >> 12, predict.yvel >> 12, wd, tz, bz, CLIPMASK0);
if (nSector == -1)
nSector = predict.sectnum;
if (sector[nSector].type >= kSectorPath && sector[nSector].type <= kSectorRotate)
{
short nSector2 = nSector;
pushmove_old((int32_t*)&predict.x, (int32_t*)&predict.y, (int32_t*)&predict.z, &nSector2, wd, tz, bz, CLIPMASK0);
if (nSector2 != -1)
nSector = nSector2;
}
assert(nSector >= 0);
pSprite->cstat = bakCstat;
}
switch (predict.at75.hit&0xc000)
{
case 0x8000:
{
int nHitWall = predict.at75.hit&0x3fff;
walltype *pHitWall = &wall[nHitWall];
if (pHitWall->nextsector != -1)
{
sectortype *pHitSector = &sector[pHitWall->nextsector];
if (top < pHitSector->ceilingz || bottom > pHitSector->floorz)
{
// ???
}
}
actWallBounceVector(&predict.xvel, &predict.yvel, nHitWall, 0);
break;
}
}
}
if (predict.sectnum != nSector)
{
assert(nSector >= 0 && nSector < kMaxSectors);
predict.sectnum = nSector;
}
char bUnderwater = 0;
char bDepth = 0;
int nXSector = sector[nSector].extra;
if (nXSector > 0)
{
XSECTOR *pXSector = &xsector[nXSector];
if (pXSector->Underwater)
bUnderwater = 1;
if (pXSector->Depth)
bDepth = 1;
}
int nUpperLink = gUpperLink[nSector];
int nLowerLink = gLowerLink[nSector];
if (nUpperLink >= 0 && (sprite[nUpperLink].type == kMarkerUpWater || sprite[nUpperLink].type == kMarkerUpGoo))
bDepth = 1;
if (nLowerLink >= 0 && (sprite[nLowerLink].type == kMarkerLowWater || sprite[nLowerLink].type == kMarkerLowGoo))
bDepth = 1;
if (pPlayer)
wd += 16;
if (predict.zvel)
predict.z += predict.zvel >> 8;
static_assert(sizeof(tspritetype) == sizeof(spritetype));
tspritetype pSpriteBak; memcpy(&pSpriteBak, pSprite, sizeof(pSpriteBak)); // how dare you??? (Use a tspritetype here so that if the sprite storage gets refactored, this line gets flagged.)
spritetype *pTempSprite = pSprite;
pTempSprite->x = predict.x;
pTempSprite->y = predict.y;
pTempSprite->z = predict.z;
pTempSprite->sectnum = predict.sectnum;
int ceilZ, ceilHit, floorZ, floorHit;
GetZRange(pTempSprite, &ceilZ, &ceilHit, &floorZ, &floorHit, wd, CLIPMASK0);
GetSpriteExtents(pTempSprite, &top, &bottom);
if (predict.at73 & 2)
{
int vc = 58254;
if (bDepth)
{
if (bUnderwater)
{
int cz = getceilzofslope(nSector, predict.x, predict.y);
if (cz > top)
vc += ((bottom-cz)*-80099) / (bottom-top);
else
vc = 0;
}
else
{
int fz = getflorzofslope(nSector, predict.x, predict.y);
if (fz < bottom)
vc += ((bottom-fz)*-80099) / (bottom-top);
}
}
else
{
if (bUnderwater)
vc = 0;
else if (bottom >= floorZ)
vc = 0;
}
if (vc)
{
predict.z += ((vc*4)/2)>>8;
predict.zvel += vc;
}
}
GetSpriteExtents(pTempSprite, &top, &bottom);
if (bottom >= floorZ)
{
int floorZ2 = floorZ;
int floorHit2 = floorHit;
GetZRange(pTempSprite, &ceilZ, &ceilHit, &floorZ, &floorHit, pSprite->clipdist<<2, CLIPMASK0, PARALLAXCLIP_CEILING|PARALLAXCLIP_FLOOR);
if (bottom <= floorZ && predict.z-floorZ2 < bz)
{
floorZ = floorZ2;
floorHit = floorHit2;
}
}
if (floorZ <= bottom)
{
predict.at75.florhit = floorHit;
predict.z += floorZ-bottom;
int var44 = predict.zvel-velFloor[predict.sectnum];
if (var44 > 0)
{
actFloorBounceVector(&predict.xvel, &predict.yvel, &var44, predict.sectnum, 0);
predict.zvel = var44;
if (abs(predict.zvel) < 0x10000)
{
predict.zvel = velFloor[predict.sectnum];
predict.at73 &= ~4;
}
else
predict.at73 |= 4;
}
else if (predict.zvel == 0)
predict.at73 &= ~4;
}
else
{
predict.at75.florhit = 0;
if (predict.at73 & 2)
predict.at73 |= 4;
}
if (top <= ceilZ)
{
predict.at75.ceilhit = ceilHit;
predict.z += ClipLow(ceilZ-top, 0);
if (predict.zvel <= 0 && (predict.at73&4))
predict.zvel = MulScale(-predict.zvel, 0x2000, 16);
}
else
predict.at75.ceilhit = 0;
GetSpriteExtents(pTempSprite, &top, &bottom);
memcpy(pSprite, &pSpriteBak, sizeof(pSpriteBak));
predict.floordist = ClipLow(floorZ-bottom, 0)>>8;
if (predict.xvel || predict.yvel)
{
if ((floorHit & 0xc000) == 0xc000)
{
int nHitSprite = floorHit & 0x3fff;
if ((sprite[nHitSprite].cstat & 0x30) == 0)
{
predict.xvel += MulScale(4, predict.x - sprite[nHitSprite].x, 2);
predict.yvel += MulScale(4, predict.y - sprite[nHitSprite].y, 2);
return;
}
}
int nXSector = sector[pSprite->sectnum].extra;
if (nXSector > 0 && xsector[nXSector].Underwater)
return;
if (predict.floordist >= 0x100)
return;
int nDrag = gDudeDrag;
if (predict.floordist > 0)
nDrag -= scale(gDudeDrag, predict.floordist, 0x100);
predict.xvel -= mulscale16r(predict.xvel, nDrag);
predict.yvel -= mulscale16r(predict.yvel, nDrag);
if (approxDist(predict.xvel, predict.yvel) < 0x1000)
predict.xvel = predict.yvel = 0;
}
}
static void fakeActAirDrag(spritetype *, int num)
{
int xvec = 0;
int yvec = 0;
int nSector = predict.sectnum;
assert(nSector >= 0 && nSector < kMaxSectors);
sectortype *pSector = &sector[nSector];
int nXSector = pSector->extra;
if (nXSector > 0)
{
assert(nXSector < kMaxXSectors);
XSECTOR *pXSector = &xsector[nXSector];
if (pXSector->windVel && (pXSector->windAlways || pXSector->busy))
{
int vel = pXSector->windVel<<12;
if (!pXSector->windAlways && pXSector->busy)
vel = MulScale(vel, pXSector->busy, 16);
xvec = MulScale(vel, Cos(pXSector->windAng), 30);
yvec = MulScale(vel, Sin(pXSector->windAng), 30);
}
}
predict.xvel += MulScale(xvec-predict.xvel, num, 16);
predict.yvel += MulScale(yvec-predict.yvel, num, 16);
predict.zvel -= MulScale(predict.zvel, num, 16);
}
void fakeActProcessSprites(void)
{
spritetype *pSprite = gMe->pSprite;
if (pSprite->statnum == kStatDude)
{
int nXSprite = pSprite->extra;
assert(nXSprite > 0 && nXSprite < kMaxXSprites);
int nSector = predict.sectnum;
int nXSector = sector[nSector].extra;
XSECTOR *pXSector = NULL;
if (nXSector > 0)
{
assert(nXSector > 0 && nXSector < kMaxXSectors);
assert(xsector[nXSector].reference == nSector);
pXSector = &xsector[nXSector];
}
if (pXSector)
{
int top, bottom;
GetSpriteExtents(pSprite, &top, &bottom);
top += predict.z - pSprite->z;
bottom += predict.z - pSprite->z;
if (getflorzofslope(nSector, predict.x, predict.y) < bottom)
{
int angle = pXSector->panAngle;
int speed = 0;
if (pXSector->panAlways || pXSector->state || pXSector->busy)
{
speed = pXSector->panVel << 9;
if (!pXSector->panAlways && pXSector->busy)
speed = MulScale(speed, pXSector->busy, 16);
}
if (sector[nSector].floorstat&64)
angle = (GetWallAngle(sector[nSector].wallptr)+512)&2047;
predict.xvel += MulScale(speed,Cos(angle), 30);
predict.yvel += MulScale(speed,Sin(angle), 30);
}
}
if (pXSector && pXSector->Underwater)
fakeActAirDrag(pSprite, 5376);
else
fakeActAirDrag(pSprite, 128);
if ((predict.at73 & 4) != 0 || predict.xvel != 0 || predict.yvel != 0 || predict.zvel != 0 || velFloor[predict.sectnum] != 0 || velCeil[predict.sectnum] != 0)
{
fakeMoveDude(pSprite);
}
}
}
void viewCorrectPrediction(void)
{
#if 0
spritetype *pSprite = gMe->pSprite;
VIEW *pView = &predictFifo[(gNetFifoTail-1)&255];
if (gMe->angle.ang != pView->at30 || pView->at24 != gMe->horizon.horiz || pView->at50 != pSprite->x || pView->at54 != pSprite->y || pView->at58 != pSprite->z)
{
viewInitializePrediction();
predictOld = gPrevView[myconnectindex];
gPredictTail = gNetFifoTail;
while (gPredictTail < gNetFifoHead[myconnectindex])
{
viewUpdatePrediction(&gFifoInput[gPredictTail&255][myconnectindex]);
}
}
#endif
}
END_BLD_NS
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