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p_mobj.c
1622 lines (1383 loc) · 44.2 KB
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p_mobj.c
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/**\file
*\section License
* License: GPL
* Online License Link: http://www.gnu.org/licenses/gpl.html
*
*\author Copyright © 2003-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
*\author Copyright © 2006-2013 Daniel Swanson <danij@dengine.net>
*\author Copyright © 1999 Activision
*
* 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 St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* Moving object handling. Spawn functions.
*/
// HEADER FILES ------------------------------------------------------------
#include <math.h>
#include <string.h>
#include "jheretic.h"
#include "d_netcl.h"
#include "dmu_lib.h"
#include "hu_stuff.h"
#include "g_common.h"
#include "p_map.h"
#include "p_terraintype.h"
#include "p_player.h"
#include "p_tick.h"
#include <assert.h>
// MACROS ------------------------------------------------------------------
#define VANISHTICS (2*TICSPERSEC)
#define MAX_BOB_OFFSET (8)
#define NOMOMENTUM_THRESHOLD (0.000001)
#define WALKSTOP_THRESHOLD (0.062484741) // FIX2FLT(0x1000-1)
// PUBLIC DATA DEFINITIONS -------------------------------------------------
mobjtype_t puffType;
mobj_t *missileMobj;
// PRIVATE DATA DEFINITIONS ------------------------------------------------
// CODE --------------------------------------------------------------------
const terraintype_t* P_MobjGetFloorTerrainType(mobj_t* mo)
{
Sector* sec = P_GetPtrp(mo->bspLeaf, DMU_SECTOR);
return P_PlaneMaterialTerrainType(sec, PLN_FLOOR);
}
/**
* @return @c true, if the mobj is still present.
*/
boolean P_MobjChangeState(mobj_t* mobj, statenum_t state)
{
state_t* st;
if(state == S_NULL)
{
// Remove mobj.
mobj->state = (state_t *) S_NULL;
P_MobjRemove(mobj, false);
return false;
}
P_MobjSetState(mobj, state);
mobj->turnTime = false; // $visangle-facetarget.
st = &STATES[state];
if(Mobj_ActionFunctionAllowed(mobj))
{
if(st->action) st->action(mobj); // Call action function.
}
return true;
}
/**
* Same as P_MobjChangeState, but does not call the state function.
*/
boolean P_SetMobjStateNF(mobj_t *mobj, statenum_t state)
{
if(state == S_NULL)
{ // Remove mobj.
mobj->state = (state_t *) S_NULL;
P_MobjRemove(mobj, false);
return false;
}
mobj->turnTime = false; // $visangle-facetarget
P_MobjSetState(mobj, state);
return true;
}
void P_ExplodeMissile(mobj_t *mo)
{
if(!mo->info) return;
if(mo->type == MT_WHIRLWIND)
{
if(++mo->special2 < 60)
{
return;
}
}
mo->mom[MX] = mo->mom[MY] = mo->mom[MZ] = 0;
P_MobjChangeState(mo, P_GetState(mo->type, SN_DEATH));
if(mo->flags & MF_MISSILE)
{
mo->flags &= ~MF_MISSILE;
mo->flags |= MF_VIEWALIGN;
if(mo->flags & MF_BRIGHTEXPLODE)
mo->flags |= MF_BRIGHTSHADOW;
}
if(mo->info->deathSound)
{
S_StartSound(mo->info->deathSound, mo);
}
}
void P_FloorBounceMissile(mobj_t* mo)
{
mo->mom[MZ] = -mo->mom[MZ];
P_MobjChangeState(mo, P_GetState(mo->type, SN_DEATH));
}
void P_ThrustMobj(mobj_t* mo, angle_t angle, coord_t move)
{
uint an = angle >> ANGLETOFINESHIFT;
mo->mom[MX] += move * FIX2FLT(finecosine[an]);
mo->mom[MY] += move * FIX2FLT(finesine[an]);
}
/**
* @param delta The amount 'source' needs to turn.
*
* @return @c 1, = 'source' needs to turn clockwise, or
* @c 0, = 'source' needs to turn counter clockwise.
*/
int P_FaceMobj(mobj_t* source, mobj_t* target, angle_t* delta)
{
angle_t diff, angle1, angle2;
angle1 = source->angle;
angle2 = M_PointToAngle2(source->origin, target->origin);
if(angle2 > angle1)
{
diff = angle2 - angle1;
if(diff > ANGLE_180)
{
*delta = ANGLE_MAX - diff;
return 0;
}
else
{
*delta = diff;
return 1;
}
}
else
{
diff = angle1 - angle2;
if(diff > ANGLE_180)
{
*delta = ANGLE_MAX - diff;
return 1;
}
else
{
*delta = diff;
return 0;
}
}
}
/**
* The missile tracer field must be the target.
*
* @return @c true, if target was tracked else @c false.
*/
boolean P_SeekerMissile(mobj_t* actor, angle_t thresh, angle_t turnMax)
{
int dir;
uint an;
coord_t dist;
angle_t delta;
mobj_t* target;
target = actor->tracer;
if(!target) return false;
if(!(target->flags & MF_SHOOTABLE))
{ // Target died.
actor->tracer = NULL;
return false;
}
dir = P_FaceMobj(actor, target, &delta);
if(delta > thresh)
{
delta >>= 1;
if(delta > turnMax)
{
delta = turnMax;
}
}
if(dir)
{ // Turn clockwise.
actor->angle += delta;
}
else
{ // Turn counter clockwise.
actor->angle -= delta;
}
an = actor->angle >> ANGLETOFINESHIFT;
actor->mom[MX] = actor->info->speed * FIX2FLT(finecosine[an]);
actor->mom[MY] = actor->info->speed * FIX2FLT(finesine[an]);
if(actor->origin[VZ] + actor->height < target->origin[VZ] ||
target->origin[VZ] + target->height < actor->origin[VZ])
{ // Need to seek vertically.
dist = M_ApproxDistance(target->origin[VX] - actor->origin[VX],
target->origin[VY] - actor->origin[VY]);
dist /= actor->info->speed;
if(dist < 1)
dist = 1;
actor->mom[MZ] = (target->origin[VZ] - actor->origin[VZ]) / dist;
}
return true;
}
/**
* Wind pushes the mobj, if its sector special is a wind type.
*/
void P_WindThrust(mobj_t* mo)
{
static int windTab[3] = { 2048 * 5, 2048 * 10, 2048 * 25 };
Sector* sec = P_GetPtrp(mo->bspLeaf, DMU_SECTOR);
int special = P_ToXSector(sec)->special;
switch(special)
{
case 40: // Wind_East
case 41:
case 42:
P_ThrustMobj(mo, 0, FIX2FLT(windTab[special - 40]));
break;
case 43: // Wind_North
case 44:
case 45:
P_ThrustMobj(mo, ANG90, FIX2FLT(windTab[special - 43]));
break;
case 46: // Wind_South
case 47:
case 48:
P_ThrustMobj(mo, ANG270, FIX2FLT(windTab[special - 46]));
break;
case 49: // Wind_West
case 50:
case 51:
P_ThrustMobj(mo, ANG180, FIX2FLT(windTab[special - 49]));
break;
default:
break;
}
}
coord_t P_MobjGetFriction(mobj_t* mo)
{
if((mo->flags2 & MF2_FLY) && !(mo->origin[VZ] <= mo->floorZ) && !mo->onMobj)
{
return FRICTION_FLY;
}
else
{
Sector* sec = P_GetPtrp(mo->bspLeaf, DMU_SECTOR);
if(P_ToXSector(sec)->special == 15)
{
return FRICTION_LOW;
}
return XS_Friction(sec);
}
}
void P_MobjMoveXY(mobj_t* mo)
{
coord_t pos[2], mom[2];
player_t* player;
boolean largeNegative;
// $democam: cameramen have their own movement code
if(P_CameraXYMovement(mo))
return;
mom[MX] = MINMAX_OF(-MAXMOM, mo->mom[MX], MAXMOM);
mom[MY] = MINMAX_OF(-MAXMOM, mo->mom[MY], MAXMOM);
mo->mom[MX] = mom[MX];
mo->mom[MY] = mom[MY];
if(FEQUAL(mom[MX], 0) && FEQUAL(mom[MY], 0))
{
if(mo->flags & MF_SKULLFLY)
{
// A flying mobj slammed into something.
mo->flags &= ~MF_SKULLFLY;
mo->mom[MX] = mo->mom[MY] = mo->mom[MZ] = 0;
P_MobjChangeState(mo, P_GetState(mo->type, SN_SEE));
}
return;
}
if(mo->flags2 & MF2_WINDTHRUST)
P_WindThrust(mo);
player = mo->player;
do
{
/**
* DOOM.exe bug fix:
* Large negative displacements were never considered. This explains
* the tendency for Mancubus fireballs to pass through walls.
*/
largeNegative = false;
if(!cfg.moveBlock && (mom[MX] < -MAXMOMSTEP || mom[MY] < -MAXMOMSTEP))
{
// Make an exception for "north-only wallrunning".
if(!(cfg.wallRunNorthOnly && mo->wallRun))
largeNegative = true;
}
if(largeNegative || mom[MX] > MAXMOMSTEP || mom[MY] > MAXMOMSTEP)
{
pos[VX] = mo->origin[VX] + mom[MX] / 2;
pos[VY] = mo->origin[VY] + mom[MY] / 2;
mom[MX] /= 2;
mom[MY] /= 2;
}
else
{
pos[VX] = mo->origin[VX] + mom[MX];
pos[VY] = mo->origin[VY] + mom[MY];
mom[MX] = mom[MY] = 0;
}
// If mobj was wallrunning - stop.
if(mo->wallRun)
mo->wallRun = false;
// $dropoff_fix
if(!P_TryMoveXY(mo, pos[VX], pos[VY], true, false))
{ // Blocked mom.
if(mo->flags2 & MF2_SLIDE)
{ // Try to slide along it.
P_SlideMove(mo);
}
else if(mo->flags & MF_MISSILE)
{
// Explode a missile
Sector* backSec;
/// @kludge: Prevent missiles exploding against the sky.
if(ceilingLine && (backSec = P_GetPtrp(ceilingLine, DMU_BACK_SECTOR)))
{
if((P_GetIntp(P_GetPtrp(backSec, DMU_CEILING_MATERIAL), DMU_FLAGS) & MATF_SKYMASK) &&
mo->origin[VZ] > P_GetDoublep(backSec, DMU_CEILING_HEIGHT))
{
if(mo->type == MT_BLOODYSKULL)
{
mo->mom[MX] = mo->mom[MY] = 0;
mo->mom[MZ] = -1;
}
else
{
P_MobjRemove(mo, false);
}
return;
}
}
if(floorLine && (backSec = P_GetPtrp(floorLine, DMU_BACK_SECTOR)))
{
if((P_GetIntp(P_GetPtrp(backSec, DMU_FLOOR_MATERIAL), DMU_FLAGS) & MATF_SKYMASK) &&
mo->origin[VZ] < P_GetDoublep(backSec, DMU_FLOOR_HEIGHT))
{
if(mo->type == MT_BLOODYSKULL)
{
mo->mom[MX] = mo->mom[MY] = 0;
mo->mom[MZ] = -1;
}
else
{
P_MobjRemove(mo, false);
}
return;
}
}
// kludge end.
P_ExplodeMissile(mo);
}
else
{
mo->mom[MX] = mo->mom[MY] = 0;
}
}
} while(!INRANGE_OF(mom[MX], 0, NOMOM_THRESHOLD) ||
!INRANGE_OF(mom[MY], 0, NOMOM_THRESHOLD));
// Slow down.
Mobj_XYMoveStopping(mo);
}
void P_MobjMoveZ(mobj_t* mo)
{
coord_t gravity;
coord_t dist;
coord_t delta;
// $democam: cameramen get special z movement
if(P_CameraZMovement(mo))
return;
gravity = XS_Gravity(P_GetPtrp(mo->bspLeaf, DMU_SECTOR));
// $voodoodolls: Check for smooth step up unless a voodoo doll.
if(mo->player && mo->player->plr->mo == mo && mo->origin[VZ] < mo->floorZ)
{
mo->player->viewHeight -= mo->floorZ - mo->origin[VZ];
mo->player->viewHeightDelta =
(cfg.plrViewHeight - mo->player->viewHeight) / 8;
}
// Adjust height.
mo->origin[VZ] += mo->mom[MZ];
if((mo->flags2 & MF2_FLY) &&
mo->onMobj && mo->origin[VZ] > mo->onMobj->origin[VZ] + mo->onMobj->height)
mo->onMobj = NULL; // We were on a mobj, we are NOT now.
if((mo->flags & MF_FLOAT) && mo->target && !P_MobjIsCamera(mo->target))
{
// Float down towards target if too close.
if(!(mo->flags & MF_SKULLFLY) && !(mo->flags & MF_INFLOAT))
{
coord_t oldZ = mo->origin[VZ];
dist = M_ApproxDistance(mo->origin[VX] - mo->target->origin[VX],
mo->origin[VY] - mo->target->origin[VY]);
delta = (mo->target->origin[VZ] + mo->target->height /2) -
(mo->origin[VZ] + mo->height /2);
if(dist < mo->radius + mo->target->radius &&
fabs(delta) < mo->height + mo->target->height)
{
// Don't go INTO the target.
delta = 0;
}
if(delta < 0 && dist < -(delta * 3))
{
mo->origin[VZ] -= FLOATSPEED;
P_MobjSetSRVOZ(mo, -FLOATSPEED);
}
else if(delta > 0 && dist < (delta * 3))
{
mo->origin[VZ] += FLOATSPEED;
P_MobjSetSRVOZ(mo, FLOATSPEED);
}
if(delta)
{
// Where did we end up?
if(!P_CheckPosition(mo, mo->origin))
{
// Not a valid position; undo the move.
mo->origin[VZ] = oldZ;
P_MobjSetSRVOZ(mo, 0);
}
}
}
}
if(cfg.allowMonsterFloatOverBlocking && (mo->flags & MF_FLOAT) && !mo->player && !(mo->flags & MF_SKULLFLY))
{
if(!P_CheckPosition(mo, mo->origin))
{
#ifdef _DEBUG
Con_Message("Floating thing %i has gotten stuck! onmobj=%i z=%f flz=%f tmfz=%f",
mo->thinker.id, mo->onMobj? mo->onMobj->thinker.id : 0, mo->origin[VZ], mo->floorZ, tmFloorZ);
#endif
if(mo->origin[VZ] < tmFloorZ)
{
mo->origin[VZ] = mo->floorZ = tmFloorZ;
}
}
}
// Do some fly-bobbing.
if(mo->player && mo->player->plr->mo == mo &&
(mo->flags2 & MF2_FLY) && mo->origin[VZ] > mo->floorZ &&
!mo->onMobj && (mapTime & 2))
{
mo->origin[VZ] += FIX2FLT(finesine[(FINEANGLES / 20 * mapTime >> 2) & FINEMASK]);
}
// Clip movement. Another thing?
if(mo->onMobj && mo->origin[VZ] <= mo->onMobj->origin[VZ] + mo->onMobj->height)
{
if(mo->mom[MZ] < 0)
{
if(mo->player && mo->mom[MZ] < -gravity * 8 && !(mo->flags2 & MF2_FLY))
{
// Squat down. Decrease viewheight for a moment after
// hitting the ground (hard), and utter appropriate sound.
mo->player->viewHeightDelta = mo->mom[MZ] / 8;
if(mo->player->health > 0)
S_StartSound(SFX_PLROOF, mo);
}
mo->mom[MZ] = 0;
}
if(FEQUAL(mo->mom[MZ], 0))
mo->origin[VZ] = mo->onMobj->origin[VZ] + mo->onMobj->height;
if((mo->flags & MF_MISSILE) && !(mo->flags & MF_NOCLIP))
{
P_ExplodeMissile(mo);
return;
}
}
// The floor.
if(mo->origin[VZ] <= mo->floorZ)
{ // Hit the floor.
boolean movingDown;
// Note (id):
// somebody left this after the setting mom[MZ] to 0,
// kinda useless there.
//
// cph - This was the a bug in the linuxdoom-1.10 source which
// caused it not to sync Doom 2 v1.9 demos. Someone
// added the above comment and moved up the following code. So
// demos would desync in close lost soul fights.
// Note that this only applies to original Doom 1 or Doom2 demos - not
// Final Doom and Ultimate Doom. So we test demo_compatibility *and*
// gamemission. (Note we assume that Doom1 is always Ult Doom, which
// seems to hold for most published demos.)
//
// fraggle - cph got the logic here slightly wrong. There are three
// versions of Doom 1.9:
//
// * The version used in registered doom 1.9 + doom2 - no bounce
// * The version used in ultimate doom - has bounce
// * The version used in final doom - has bounce
//
// So we need to check that this is either retail or commercial
// (but not doom2)
int correct_lost_soul_bounce = false;
if(correct_lost_soul_bounce && (mo->flags & MF_SKULLFLY))
{
// the skull slammed into something
mo->mom[MZ] = -mo->mom[MZ];
}
if((movingDown = (mo->mom[MZ] < 0)))
{
if(mo->player && mo->mom[MZ] < -gravity * 8 && !(mo->flags2 & MF2_FLY))
{
// Squat down. Decrease viewheight for a moment after
// hitting the ground hard and utter appropriate sound.
mo->player->viewHeightDelta = mo->mom[MZ] / 8;
#if __JHERETIC__
mo->player->jumpTics = 12; // Can't jump in a while.
#endif
// Fix DOOM bug - dead players grunting when hitting the ground
// (e.g., after an archvile attack)
if(mo->player->health > 0)
S_StartSound(SFX_PLROOF, mo);
}
}
mo->origin[VZ] = mo->floorZ;
if(movingDown)
P_HitFloor(mo);
// cph 2001/05/26 -
// See lost soul bouncing comment above. We need this here for bug
// compatibility with original Doom2 v1.9 - if a soul is charging and
// hit by a raising floor this incorrectly reverses its Y momentum.
if(!correct_lost_soul_bounce && (mo->flags & MF_SKULLFLY))
mo->mom[MZ] = -mo->mom[MZ];
if((mo->flags & MF_MISSILE) && !(mo->flags & MF_NOCLIP))
{
if(mo->flags2 & MF2_FLOORBOUNCE)
{
P_FloorBounceMissile(mo);
return;
}
#if __JHERETIC__
else if(mo->type == MT_MNTRFX2)
{ // Minotaur floor fire can go up steps
return;
}
else
#endif
{
P_ExplodeMissile(mo);
return;
}
}
if(movingDown && mo->mom[MZ] < 0)
mo->mom[MZ] = 0;
#if __JHERETIC__
{
statenum_t state;
if((state = P_GetState(mo->type, SN_CRASH)) != S_NULL &&
(mo->flags & MF_CORPSE))
{
P_MobjChangeState(mo, state);
return;
}
}
#endif
}
else if(mo->flags2 & MF2_LOGRAV)
{
if(FEQUAL(mo->mom[MZ], 0))
mo->mom[MZ] = -(gravity / 8) * 2;
else
mo->mom[MZ] -= gravity / 8;
}
else if(!(mo->flags & MF_NOGRAVITY))
{
if(FEQUAL(mo->mom[MZ], 0))
mo->mom[MZ] = -gravity * 2;
else
mo->mom[MZ] -= gravity;
}
if(mo->origin[VZ] + mo->height > mo->ceilingZ)
{
// hit the ceiling
if(mo->mom[MZ] > 0)
mo->mom[MZ] = 0;
mo->origin[VZ] = mo->ceilingZ - mo->height;
if(mo->flags & MF_SKULLFLY)
{ // the skull slammed into something
mo->mom[MZ] = -mo->mom[MZ];
}
if((mo->flags & MF_MISSILE) && !(mo->flags & MF_NOCLIP))
{
if(P_GetIntp(P_GetPtrp(mo->bspLeaf, DMU_CEILING_MATERIAL),
DMU_FLAGS) & MATF_SKYMASK)
{
#if __JHERETIC__
if(mo->type == MT_BLOODYSKULL)
{
mo->mom[MX] = mo->mom[MY] = 0;
mo->mom[MZ] = -1;
}
else
#endif
// Don't explode against sky.
{
P_MobjRemove(mo, false);
}
return;
}
P_ExplodeMissile(mo);
return;
}
}
}
void P_NightmareRespawn(mobj_t* mobj)
{
mobj_t* mo;
// Something is occupying it's position?
if(!P_CheckPositionXY(mobj, mobj->spawnSpot.origin[VX],
mobj->spawnSpot.origin[VY]))
return; // No respwan.
if((mo = P_SpawnMobj(mobj->type, mobj->spawnSpot.origin,
mobj->spawnSpot.angle, mobj->spawnSpot.flags)))
{
mo->reactionTime = 18;
// Spawn a teleport fog at old spot because of removal of the body?
if((mo = P_SpawnMobjXYZ(MT_TFOG, mobj->origin[VX], mobj->origin[VY],
TELEFOGHEIGHT, mobj->angle, MSF_Z_FLOOR)))
S_StartSound(SFX_TELEPT, mo);
// Spawn a teleport fog at the new spot.
if((mo = P_SpawnMobjXYZ(MT_TFOG, mobj->spawnSpot.origin[VX],
mobj->spawnSpot.origin[VY], TELEFOGHEIGHT,
mobj->spawnSpot.angle, MSF_Z_FLOOR)))
S_StartSound(SFX_TELEPT, mo);
}
// Remove the old monster.
P_MobjRemove(mobj, true);
}
void P_MobjThinker(void *thinkerPtr)
{
mobj_t *mobj = thinkerPtr;
if(IS_CLIENT && !ClMobj_IsValid(mobj))
return; // We should not touch this right now.
if(mobj->type == MT_BLASTERFX1)
{
int i;
coord_t frac[3];
coord_t z;
boolean changexy;
// Handle movement
if(!FEQUAL(mobj->mom[MX], 0) || !FEQUAL(mobj->mom[MY], 0) || !FEQUAL(mobj->mom[MZ], 0) ||
!FEQUAL(mobj->origin[VZ], mobj->floorZ))
{
frac[MX] = mobj->mom[MX] / 8;
frac[MY] = mobj->mom[MY] / 8;
frac[MZ] = mobj->mom[MZ] / 8;
changexy = (!FEQUAL(frac[MX], 0) || !FEQUAL(frac[MY], 0));
for(i = 0; i < 8; ++i)
{
if(changexy)
{
if(!P_TryMoveXY(mobj, mobj->origin[VX] + frac[MX],
mobj->origin[VY] + frac[MY], false, false))
{ // Blocked move.
P_ExplodeMissile(mobj);
return;
}
}
mobj->origin[VZ] += frac[MZ];
if(mobj->origin[VZ] <= mobj->floorZ)
{
// Hit the floor.
mobj->origin[VZ] = mobj->floorZ;
P_HitFloor(mobj);
P_ExplodeMissile(mobj);
return;
}
if(mobj->origin[VZ] + mobj->height > mobj->ceilingZ)
{ // Hit the ceiling.
mobj->origin[VZ] = mobj->ceilingZ - mobj->height;
P_ExplodeMissile(mobj);
return;
}
if(changexy && (P_Random() < 64))
{
z = mobj->origin[VZ] - 8;
if(z < mobj->floorZ)
{
z = mobj->floorZ;
}
P_SpawnMobjXYZ(MT_BLASTERSMOKE, mobj->origin[VX], mobj->origin[VY],
z, P_Random() << 24, 0);
}
}
}
// Advance the state.
if(mobj->tics != -1)
{
mobj->tics--;
while(!mobj->tics)
{
if(!P_MobjChangeState(mobj, mobj->state->nextState))
{ // Mobj was removed.
return;
}
}
}
return;
}
// The first three bits of the selector special byte contain a relative
// health level.
P_UpdateHealthBits(mobj);
// Handle X and Y momentums.
if(!FEQUAL(mobj->mom[MX], 0) || !FEQUAL(mobj->mom[MY], 0) || (mobj->flags & MF_SKULLFLY))
{
// Detect moves into invalid positions.
/*
#if _DEBUG
boolean beforeOk = P_CheckPosition(mobj, mobj->origin);
#endif
*/
P_MobjMoveXY(mobj);
//assert(!beforeOk || P_CheckPosition(mobj, mobj->origin));
//// @todo decent NOP/NULL/Nil function pointer please.
if(mobj->thinker.function == (thinkfunc_t) NOPFUNC)
return; // Mobj was removed.
}
if(mobj->flags2 & MF2_FLOATBOB)
{ // Floating item bobbing motion.
// Keep it on the floor.
mobj->origin[VZ] = mobj->floorZ;
// Negative floorclip raises the mobj off the floor.
mobj->floorClip = -mobj->special1;
if(mobj->floorClip < -MAX_BOB_OFFSET)
{
// We don't want it going through the floor.
mobj->floorClip = -MAX_BOB_OFFSET;
}
}
else if(!FEQUAL(mobj->origin[VZ], mobj->floorZ) || !FEQUAL(mobj->mom[MZ], 0))
{
coord_t oldZ = mobj->origin[VZ];
P_MobjMoveZ(mobj);
if(mobj->thinker.function != (thinkfunc_t) P_MobjThinker)
return; // mobj was removed
/**
* @todo Instead of this post-move check, we should fix the root cause why
* the SKULLFLYer is ending up in an invalid position during P_MobjMoveZ().
* If only the movement validity checks weren't so convoluted... -jk
*/
if((mobj->flags & MF_SKULLFLY) && !P_CheckPosition(mobj, mobj->origin))
{
// Let's not get stuck.
if(mobj->origin[VZ] > oldZ && mobj->mom[VZ] > 0) mobj->mom[VZ] = 0;
if(mobj->origin[VZ] < oldZ && mobj->mom[VZ] < 0) mobj->mom[VZ] = 0;
mobj->origin[VZ] = oldZ;
}
}
// Non-sentient objects at rest.
else if(!(!FEQUAL(mobj->mom[MX], 0) || !FEQUAL(mobj->mom[MY], 0)) && !sentient(mobj) &&
!mobj->player && !((mobj->flags & MF_CORPSE) && cfg.slidingCorpses))
{
/**
* Objects fall off ledges if they are hanging off slightly push off
* of ledge if hanging more than halfway off.
*/
if(mobj->origin[VZ] > mobj->dropOffZ && // Only objects contacting dropoff
!(mobj->flags & MF_NOGRAVITY) && cfg.fallOff)
{
P_ApplyTorque(mobj);
}
else
{
mobj->intFlags &= ~MIF_FALLING;
mobj->gear = 0; // Reset torque.
}
}
if(cfg.slidingCorpses)
{
if(((mobj->flags & MF_CORPSE) ? mobj->origin[VZ] > mobj->dropOffZ :
mobj->origin[VZ] - mobj->dropOffZ > 24) && // Only objects contacting drop off.
!(mobj->flags & MF_NOGRAVITY)) // Only objects which fall.
{
P_ApplyTorque(mobj); // Apply torque.
}
else
{
mobj->intFlags &= ~MIF_FALLING;
mobj->gear = 0; // Reset torque.
}
}
// $vanish: dead monsters disappear after some time.
if(cfg.corpseTime && (mobj->flags & MF_CORPSE) && mobj->corpseTics != -1)
{
if(++mobj->corpseTics < cfg.corpseTime * TICSPERSEC)
{
mobj->translucency = 0; // Opaque.
}
else if(mobj->corpseTics < cfg.corpseTime * TICSPERSEC + VANISHTICS)
{
// Translucent during vanishing.
mobj->translucency =
((mobj->corpseTics -
cfg.corpseTime * TICSPERSEC) * 255) / VANISHTICS;
}
else
{
// Too long; get rid of the corpse.
mobj->corpseTics = -1;
return;
}
}
// Cycle through states, calling action functions at transitions.
if(mobj->tics != -1)
{
mobj->tics--;
P_MobjAngleSRVOTicker(mobj); // "angle-servo"; smooth actor turning.
// You can cycle through multiple states in a tic.
if(!mobj->tics)
{
P_MobjClearSRVO(mobj);
if(!P_MobjChangeState(mobj, mobj->state->nextState))
return; // Freed itself.
}
}
else if(!IS_CLIENT)
{
// Check for nightmare respawn.
if(!(mobj->flags & MF_COUNTKILL))
return;
if(!respawnMonsters)
return;
mobj->moveCount++;
if(mobj->moveCount < 12 * 35)
return;
if(mapTime & 31)
return;
if(P_Random() > 4)
return;
P_NightmareRespawn(mobj);
}
}
/**
* Spawns a mobj of "type" at the specified position.
*/
mobj_t* P_SpawnMobjXYZ(mobjtype_t type, coord_t x, coord_t y, coord_t z,
angle_t angle, int spawnFlags)
{