p_mobj.c
资源名称:21.rar [点击查看]
上传用户:xuyinpeng
上传日期:2021-05-12
资源大小:455k
文件大小:20k
源码类别:
射击游戏
开发平台:
Visual C++
- // Emacs style mode select -*- C++ -*-
- //-----------------------------------------------------------------------------
- //
- // $Id:$
- //
- // Copyright (C) 1993-1996 by id Software, Inc.
- //
- // This source is available for distribution and/or modification
- // only under the terms of the DOOM Source Code License as
- // published by id Software. All rights reserved.
- //
- // The source is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
- // for more details.
- //
- // $Log:$
- //
- // DESCRIPTION:
- // Moving object handling. Spawn functions.
- //
- //-----------------------------------------------------------------------------
- static const char
- rcsid[] = "$Id: p_mobj.c,v 1.5 1997/02/03 22:45:12 b1 Exp $";
- #include "i_system.h"
- #include "z_zone.h"
- #include "m_random.h"
- #include "doomdef.h"
- #include "p_local.h"
- #include "sounds.h"
- #include "st_stuff.h"
- #include "hu_stuff.h"
- #include "s_sound.h"
- #include "doomstat.h"
- void WriteDebug(char *);
- char MsgText[256];
- void G_PlayerReborn (int player);
- void P_SpawnMapThing (mapthing_t* mthing);
- //
- // P_SetMobjState
- // Returns true if the mobj is still present.
- //
- int test;
- boolean
- P_SetMobjState
- ( mobj_t* mobj,
- statenum_t state )
- {
- state_t* st;
- do
- {
- if (state == S_NULL)
- {
- mobj->state = (state_t *) S_NULL;
- P_RemoveMobj (mobj);
- return false;
- }
- st = &states[state];
- mobj->state = st;
- mobj->tics = st->tics;
- mobj->sprite = st->sprite;
- mobj->frame = st->frame;
- // Modified handling.
- // Call action functions when the state is set
- if (st->action.acp1)
- st->action.acp1(mobj);
- state = st->nextstate;
- } while (!mobj->tics);
- return true;
- }
- //
- // P_ExplodeMissile
- //
- void P_ExplodeMissile (mobj_t* mo)
- {
- mo->momx = mo->momy = mo->momz = 0;
- P_SetMobjState (mo, mobjinfo[mo->type].deathstate);
- mo->tics -= P_Random()&3;
- if (mo->tics < 1)
- mo->tics = 1;
- mo->flags &= ~MF_MISSILE;
- if (mo->info->deathsound)
- S_StartSound (mo, mo->info->deathsound);
- }
- //
- // P_XYMovement
- //
- #define STOPSPEED 0x1000
- #define FRICTION 0xe800
- void P_XYMovement (mobj_t* mo)
- {
- fixed_t ptryx;
- fixed_t ptryy;
- player_t* player;
- fixed_t xmove;
- fixed_t ymove;
- if (!mo->momx && !mo->momy)
- {
- if (mo->flags & MF_SKULLFLY)
- {
- // the skull slammed into something
- mo->flags &= ~MF_SKULLFLY;
- mo->momx = mo->momy = mo->momz = 0;
- P_SetMobjState (mo, mo->info->spawnstate);
- }
- return;
- }
- player = mo->player;
- if (mo->momx > MAXMOVE)
- mo->momx = MAXMOVE;
- else if (mo->momx < -MAXMOVE)
- mo->momx = -MAXMOVE;
- if (mo->momy > MAXMOVE)
- mo->momy = MAXMOVE;
- else if (mo->momy < -MAXMOVE)
- mo->momy = -MAXMOVE;
- xmove = mo->momx;
- ymove = mo->momy;
- do
- {
- if (xmove > MAXMOVE/2 || ymove > MAXMOVE/2)
- {
- ptryx = mo->x + xmove/2;
- ptryy = mo->y + ymove/2;
- xmove >>= 1;
- ymove >>= 1;
- }
- else
- {
- ptryx = mo->x + xmove;
- ptryy = mo->y + ymove;
- xmove = ymove = 0;
- }
- if (!P_TryMove (mo, ptryx, ptryy))
- {
- // blocked move
- if (mo->player)
- { // try to slide along it
- P_SlideMove (mo);
- }
- else if (mo->flags & MF_MISSILE)
- {
- // explode a missile
- if (ceilingline &&
- ceilingline->backsector &&
- ceilingline->backsector->ceilingpic == skyflatnum)
- {
- // Hack to prevent missiles exploding
- // against the sky.
- // Does not handle sky floors.
- P_RemoveMobj (mo);
- return;
- }
- P_ExplodeMissile (mo);
- }
- else
- mo->momx = mo->momy = 0;
- }
- } while (xmove || ymove);
- // slow down
- if (player && player->cheats & CF_NOMOMENTUM)
- {
- // debug option for no sliding at all
- mo->momx = mo->momy = 0;
- return;
- }
- if (mo->flags & (MF_MISSILE | MF_SKULLFLY) )
- return; // no friction for missiles ever
- if (mo->z > mo->floorz)
- return; // no friction when airborne
- if (mo->flags & MF_CORPSE)
- {
- // do not stop sliding
- // if halfway off a step with some momentum
- if (mo->momx > FRACUNIT/4
- || mo->momx < -FRACUNIT/4
- || mo->momy > FRACUNIT/4
- || mo->momy < -FRACUNIT/4)
- {
- if (mo->floorz != mo->subsector->sector->floorheight)
- return;
- }
- }
- if (mo->momx > -STOPSPEED
- && mo->momx < STOPSPEED
- && mo->momy > -STOPSPEED
- && mo->momy < STOPSPEED
- && (!player
- || (player->cmd.forwardmove== 0
- && player->cmd.sidemove == 0 ) ) )
- {
- // if in a walking frame, stop moving
- if ( player&&(unsigned)((player->mo->state - states)- S_PLAY_RUN1) < 4)
- P_SetMobjState (player->mo, S_PLAY);
- mo->momx = 0;
- mo->momy = 0;
- }
- else
- {
- mo->momx = FixedMul (mo->momx, FRICTION);
- mo->momy = FixedMul (mo->momy, FRICTION);
- }
- }
- //
- // P_ZMovement
- //
- void P_ZMovement (mobj_t* mo)
- {
- fixed_t dist;
- fixed_t delta;
- // check for smooth step up
- if (mo->player && mo->z < mo->floorz)
- {
- mo->player->viewheight -= mo->floorz-mo->z;
- mo->player->deltaviewheight
- = (VIEWHEIGHT - mo->player->viewheight)>>3;
- }
- // adjust height
- mo->z += mo->momz;
- if ( mo->flags & MF_FLOAT
- && mo->target)
- {
- // float down towards target if too close
- if ( !(mo->flags & MF_SKULLFLY)
- && !(mo->flags & MF_INFLOAT) )
- {
- dist = P_AproxDistance (mo->x - mo->target->x,
- mo->y - mo->target->y);
- delta =(mo->target->z + (mo->height>>1)) - mo->z;
- if (delta<0 && dist < -(delta*3) )
- mo->z -= FLOATSPEED;
- else if (delta>0 && dist < (delta*3) )
- mo->z += FLOATSPEED;
- }
- }
- // clip movement
- if (mo->z <= mo->floorz)
- {
- // hit the floor
- // Note (id):
- // somebody left this after the setting momz to 0,
- // kinda useless there.
- if (mo->flags & MF_SKULLFLY)
- {
- // the skull slammed into something
- mo->momz = -mo->momz;
- }
- if (mo->momz < 0)
- {
- if (mo->player
- && mo->momz < -GRAVITY*8)
- {
- // Squat down.
- // Decrease viewheight for a moment
- // after hitting the ground (hard),
- // and utter appropriate sound.
- mo->player->deltaviewheight = mo->momz>>3;
- S_StartSound (mo, sfx_oof);
- }
- mo->momz = 0;
- }
- mo->z = mo->floorz;
- if ( (mo->flags & MF_MISSILE)
- && !(mo->flags & MF_NOCLIP) )
- {
- P_ExplodeMissile (mo);
- return;
- }
- }
- else if (! (mo->flags & MF_NOGRAVITY) )
- {
- if (mo->momz == 0)
- mo->momz = -GRAVITY*2;
- else
- mo->momz -= GRAVITY;
- }
- if (mo->z + mo->height > mo->ceilingz)
- {
- // hit the ceiling
- if (mo->momz > 0)
- mo->momz = 0;
- {
- mo->z = mo->ceilingz - mo->height;
- }
- if (mo->flags & MF_SKULLFLY)
- { // the skull slammed into something
- mo->momz = -mo->momz;
- }
- if ( (mo->flags & MF_MISSILE)
- && !(mo->flags & MF_NOCLIP) )
- {
- P_ExplodeMissile (mo);
- return;
- }
- }
- }
- //
- // P_NightmareRespawn
- //
- void
- P_NightmareRespawn (mobj_t* mobj)
- {
- fixed_t x;
- fixed_t y;
- fixed_t z;
- subsector_t* ss;
- mobj_t* mo;
- mapthing_t* mthing;
- x = mobj->spawnpoint.x << FRACBITS;
- y = mobj->spawnpoint.y << FRACBITS;
- // somthing is occupying it's position?
- if (!P_CheckPosition (mobj, x, y) )
- return; // no respwan
- // spawn a teleport fog at old spot
- // because of removal of the body?
- mo = P_SpawnMobj (mobj->x,
- mobj->y,
- mobj->subsector->sector->floorheight , MT_TFOG);
- // initiate teleport sound
- S_StartSound (mo, sfx_telept);
- // spawn a teleport fog at the new spot
- ss = R_PointInSubsector (x,y);
- mo = P_SpawnMobj (x, y, ss->sector->floorheight , MT_TFOG);
- S_StartSound (mo, sfx_telept);
- // spawn the new monster
- mthing = &mobj->spawnpoint;
- // spawn it
- if (mobj->info->flags & MF_SPAWNCEILING)
- z = ONCEILINGZ;
- else
- z = ONFLOORZ;
- // inherit attributes from deceased one
- mo = P_SpawnMobj (x,y,z, mobj->type);
- mo->spawnpoint = mobj->spawnpoint;
- mo->angle = ANG45 * (mthing->angle/45);
- if (mthing->options & MTF_AMBUSH)
- mo->flags |= MF_AMBUSH;
- mo->reactiontime = 18;
- // remove the old monster,
- P_RemoveMobj (mobj);
- }
- //
- // P_MobjThinker
- //
- void P_MobjThinker (mobj_t* mobj)
- {
- // momentum movement
- if (mobj->momx
- || mobj->momy
- || (mobj->flags&MF_SKULLFLY) )
- {
- P_XYMovement (mobj);
- // FIXME: decent NOP/NULL/Nil function pointer please.
- if (mobj->thinker.function.acv == (actionf_v) (-1))
- return; // mobj was removed
- }
- if ( (mobj->z != mobj->floorz)
- || mobj->momz )
- {
- P_ZMovement (mobj);
- // FIXME: decent NOP/NULL/Nil function pointer please.
- if (mobj->thinker.function.acv == (actionf_v) (-1))
- return; // mobj was removed
- }
- // cycle through states,
- // calling action functions at transitions
- if (mobj->tics != -1)
- {
- mobj->tics--;
- // you can cycle through multiple states in a tic
- if (!mobj->tics)
- if (!P_SetMobjState (mobj, mobj->state->nextstate) )
- return; // freed itself
- }
- else
- {
- // check for nightmare respawn
- if (! (mobj->flags & MF_COUNTKILL) )
- return;
- if (!respawnmonsters)
- return;
- mobj->movecount++;
- if (mobj->movecount < 12*35)
- return;
- if ( leveltime&31 )
- return;
- if (P_Random () > 4)
- return;
- P_NightmareRespawn (mobj);
- }
- }
- //
- // P_SpawnMobj
- //
- mobj_t*
- P_SpawnMobj
- ( fixed_t x,
- fixed_t y,
- fixed_t z,
- mobjtype_t type )
- {
- mobj_t* mobj;
- state_t* st;
- mobjinfo_t* info;
- mobj = Z_Malloc (sizeof(*mobj), PU_LEVEL, NULL);
- memset (mobj, 0, sizeof (*mobj));
- info = &mobjinfo[type];
- mobj->type = type;
- mobj->info = info;
- mobj->x = x;
- mobj->y = y;
- mobj->radius = info->radius;
- mobj->height = info->height;
- mobj->flags = info->flags;
- mobj->health = info->spawnhealth;
- if (gameskill != sk_nightmare)
- mobj->reactiontime = info->reactiontime;
- mobj->lastlook = P_Random () % MAXPLAYERS;
- // do not set the state with P_SetMobjState,
- // because action routines can not be called yet
- st = &states[info->spawnstate];
- mobj->state = st;
- mobj->tics = st->tics;
- mobj->sprite = st->sprite;
- mobj->frame = st->frame;
- // set subsector and/or block links
- P_SetThingPosition (mobj);
- mobj->floorz = mobj->subsector->sector->floorheight;
- mobj->ceilingz = mobj->subsector->sector->ceilingheight;
- if (z == ONFLOORZ)
- mobj->z = mobj->floorz;
- else if (z == ONCEILINGZ)
- mobj->z = mobj->ceilingz - mobj->info->height;
- else
- mobj->z = z;
- mobj->thinker.function.acp1 = (actionf_p1)P_MobjThinker;
- P_AddThinker (&mobj->thinker);
- return mobj;
- }
- //
- // P_RemoveMobj
- //
- mapthing_t itemrespawnque[ITEMQUESIZE];
- int itemrespawntime[ITEMQUESIZE];
- int iquehead;
- int iquetail;
- void P_RemoveMobj (mobj_t* mobj)
- {
- if ((mobj->flags & MF_SPECIAL)
- && !(mobj->flags & MF_DROPPED)
- && (mobj->type != MT_INV)
- && (mobj->type != MT_INS))
- {
- itemrespawnque[iquehead] = mobj->spawnpoint;
- itemrespawntime[iquehead] = leveltime;
- iquehead = (iquehead+1)&(ITEMQUESIZE-1);
- // lose one off the end?
- if (iquehead == iquetail)
- iquetail = (iquetail+1)&(ITEMQUESIZE-1);
- }
- // unlink from sector and block lists
- P_UnsetThingPosition (mobj);
- // stop any playing sound
- S_StopSound (mobj);
- // free block
- P_RemoveThinker ((thinker_t*)mobj);
- }
- //
- // P_RespawnSpecials
- //
- void P_RespawnSpecials (void)
- {
- fixed_t x;
- fixed_t y;
- fixed_t z;
- subsector_t* ss;
- mobj_t* mo;
- mapthing_t* mthing;
- int i;
- // only respawn items in deathmatch
- if (deathmatch != 2)
- return; //
- // nothing left to respawn?
- if (iquehead == iquetail)
- return;
- // wait at least 30 seconds
- if (leveltime - itemrespawntime[iquetail] < 30*35)
- return;
- mthing = &itemrespawnque[iquetail];
- x = mthing->x << FRACBITS;
- y = mthing->y << FRACBITS;
- // spawn a teleport fog at the new spot
- ss = R_PointInSubsector (x,y);
- mo = P_SpawnMobj (x, y, ss->sector->floorheight , MT_IFOG);
- S_StartSound (mo, sfx_itmbk);
- // find which type to spawn
- for (i=0 ; i< NUMMOBJTYPES ; i++)
- {
- if (mthing->type == mobjinfo[i].doomednum)
- break;
- }
- // spawn it
- if (mobjinfo[i].flags & MF_SPAWNCEILING)
- z = ONCEILINGZ;
- else
- z = ONFLOORZ;
- mo = P_SpawnMobj (x,y,z, i);
- mo->spawnpoint = *mthing;
- mo->angle = ANG45 * (mthing->angle/45);
- // pull it from the que
- iquetail = (iquetail+1)&(ITEMQUESIZE-1);
- }
- //
- // P_SpawnPlayer
- // Called when a player is spawned on the level.
- // Most of the player structure stays unchanged
- // between levels.
- //
- void P_SpawnPlayer (mapthing_t* mthing)
- {
- player_t* p;
- fixed_t x;
- fixed_t y;
- fixed_t z;
- mobj_t* mobj;
- int i;
- // not playing?
- if (!playeringame[mthing->type-1])
- return;
- p = &players[mthing->type-1];
- if (p->playerstate == PST_REBORN)
- G_PlayerReborn (mthing->type-1);
- x = mthing->x << FRACBITS;
- y = mthing->y << FRACBITS;
- z = ONFLOORZ;
- mobj = P_SpawnMobj (x,y,z, MT_PLAYER);
- // set color translations for player sprites
- if (mthing->type > 1)
- mobj->flags |= (mthing->type-1)<<MF_TRANSSHIFT;
- mobj->angle = ANG45 * (mthing->angle/45);
- mobj->player = p;
- mobj->health = p->health;
- p->mo = mobj;
- p->playerstate = PST_LIVE;
- p->refire = 0;
- p->message = NULL;
- p->damagecount = 0;
- p->bonuscount = 0;
- p->extralight = 0;
- p->fixedcolormap = 0;
- p->viewheight = VIEWHEIGHT;
- // setup gun psprite
- P_SetupPsprites (p);
- // give all cards in death match mode
- if (deathmatch)
- for (i=0 ; i<NUMCARDS ; i++)
- p->cards[i] = true;
- if (mthing->type-1 == consoleplayer)
- {
- // wake up the status bar
- ST_Start ();
- // wake up the heads up text
- HU_Start ();
- }
- }
- //
- // P_SpawnMapThing
- // The fields of the mapthing should
- // already be in host byte order.
- //
- void P_SpawnMapThing (mapthing_t* mthing)
- {
- int i;
- int bit;
- mobj_t* mobj;
- fixed_t x;
- fixed_t y;
- fixed_t z;
- // count deathmatch start positions
- if (mthing->type == 11)
- {
- if (deathmatch_p < &deathmatchstarts[10])
- {
- memcpy (deathmatch_p, mthing, sizeof(*mthing));
- deathmatch_p++;
- }
- return;
- }
- // check for players specially
- if (mthing->type <= 4)
- {
- // save spots for respawning in network games
- playerstarts[mthing->type-1] = *mthing;
- if (!deathmatch)
- P_SpawnPlayer (mthing);
- return;
- }
- // check for apropriate skill level
- if (!netgame && (mthing->options & 16) )
- return;
- if (gameskill == sk_baby)
- bit = 1;
- else if (gameskill == sk_nightmare)
- bit = 4;
- else
- bit = 1<<(gameskill-1);
- if (!(mthing->options & bit) )
- return;
- // find which type to spawn
- for (i=0 ; i< NUMMOBJTYPES ; i++)
- if (mthing->type == mobjinfo[i].doomednum)
- break;
- if (i==NUMMOBJTYPES)
- I_Error ("P_SpawnMapThing: Unknown type %i at (%i, %i)",
- mthing->type,
- mthing->x, mthing->y);
- // don't spawn keycards and players in deathmatch
- if (deathmatch && mobjinfo[i].flags & MF_NOTDMATCH)
- return;
- // don't spawn any monsters if -nomonsters
- if (nomonsters
- && ( i == MT_SKULL
- || (mobjinfo[i].flags & MF_COUNTKILL)) )
- {
- return;
- }
- // spawn it
- x = mthing->x << FRACBITS;
- y = mthing->y << FRACBITS;
- if (mobjinfo[i].flags & MF_SPAWNCEILING)
- z = ONCEILINGZ;
- else
- z = ONFLOORZ;
- mobj = P_SpawnMobj (x,y,z, i);
- mobj->spawnpoint = *mthing;
- if (mobj->tics > 0)
- mobj->tics = 1 + (P_Random () % mobj->tics);
- if (mobj->flags & MF_COUNTKILL)
- totalkills++;
- if (mobj->flags & MF_COUNTITEM)
- totalitems++;
- mobj->angle = ANG45 * (mthing->angle/45);
- if (mthing->options & MTF_AMBUSH)
- mobj->flags |= MF_AMBUSH;
- }
- //
- // GAME SPAWN FUNCTIONS
- //
- //
- // P_SpawnPuff
- //
- extern fixed_t attackrange;
- void
- P_SpawnPuff
- ( fixed_t x,
- fixed_t y,
- fixed_t z )
- {
- mobj_t* th;
- z += ((P_Random()-P_Random())<<10);
- th = P_SpawnMobj (x,y,z, MT_PUFF);
- th->momz = FRACUNIT;
- th->tics -= P_Random()&3;
- if (th->tics < 1)
- th->tics = 1;
- // don't make punches spark on the wall
- if (attackrange == MELEERANGE)
- P_SetMobjState (th, S_PUFF3);
- }
- //
- // P_SpawnBlood
- //
- void
- P_SpawnBlood
- ( fixed_t x,
- fixed_t y,
- fixed_t z,
- int damage )
- {
- mobj_t* th;
- z += ((P_Random()-P_Random())<<10);
- th = P_SpawnMobj (x,y,z, MT_BLOOD);
- th->momz = FRACUNIT*2;
- th->tics -= P_Random()&3;
- if (th->tics < 1)
- th->tics = 1;
- if (damage <= 12 && damage >= 9)
- P_SetMobjState (th,S_BLOOD2);
- else if (damage < 9)
- P_SetMobjState (th,S_BLOOD3);
- }
- //
- // P_CheckMissileSpawn
- // Moves the missile forward a bit
- // and possibly explodes it right there.
- //
- void P_CheckMissileSpawn (mobj_t* th)
- {
- th->tics -= P_Random()&3;
- if (th->tics < 1)
- th->tics = 1;
- // move a little forward so an angle can
- // be computed if it immediately explodes
- th->x += (th->momx>>1);
- th->y += (th->momy>>1);
- th->z += (th->momz>>1);
- if (!P_TryMove (th, th->x, th->y))
- P_ExplodeMissile (th);
- }
- //
- // P_SpawnMissile
- //
- mobj_t*
- P_SpawnMissile
- ( mobj_t* source,
- mobj_t* dest,
- mobjtype_t type )
- {
- mobj_t* th;
- angle_t an;
- int dist;
- th = P_SpawnMobj (source->x,
- source->y,
- source->z + 4*8*FRACUNIT, type);
- if (th->info->seesound)
- S_StartSound (th, th->info->seesound);
- th->target = source; // where it came from
- an = R_PointToAngle2 (source->x, source->y, dest->x, dest->y);
- // fuzzy player
- if (dest->flags & MF_SHADOW)
- an += (P_Random()-P_Random())<<20;
- th->angle = an;
- an >>= ANGLETOFINESHIFT;
- th->momx = FixedMul (th->info->speed, finecosine[an]);
- th->momy = FixedMul (th->info->speed, finesine[an]);
- dist = P_AproxDistance (dest->x - source->x, dest->y - source->y);
- dist = dist / th->info->speed;
- if (dist < 1)
- dist = 1;
- th->momz = (dest->z - source->z) / dist;
- P_CheckMissileSpawn (th);
- return th;
- }
- //
- // P_SpawnPlayerMissile
- // Tries to aim at a nearby monster
- //
- void
- P_SpawnPlayerMissile
- ( mobj_t* source,
- mobjtype_t type )
- {
- mobj_t* th;
- angle_t an;
- fixed_t x;
- fixed_t y;
- fixed_t z;
- fixed_t slope;
- // see which target is to be aimed at
- an = source->angle;
- slope = P_AimLineAttack (source, an, 16*64*FRACUNIT);
- if (!linetarget)
- {
- an += 1<<26;
- slope = P_AimLineAttack (source, an, 16*64*FRACUNIT);
- if (!linetarget)
- {
- an -= 2<<26;
- slope = P_AimLineAttack (source, an, 16*64*FRACUNIT);
- }
- if (!linetarget)
- {
- an = source->angle;
- slope = 0;
- }
- }
- x = source->x;
- y = source->y;
- z = source->z + 4*8*FRACUNIT;
- th = P_SpawnMobj (x,y,z, type);
- if (th->info->seesound)
- S_StartSound (th, th->info->seesound);
- th->target = source;
- th->angle = an;
- th->momx = FixedMul( th->info->speed,
- finecosine[an>>ANGLETOFINESHIFT]);
- th->momy = FixedMul( th->info->speed,
- finesine[an>>ANGLETOFINESHIFT]);
- th->momz = FixedMul( th->info->speed, slope);
- P_CheckMissileSpawn (th);
- }