ref: 080ed4ee4324fa873b4049f5cda8749d9bd801c7
dir: /src/doom/p_plats.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// 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.
//
// DESCRIPTION:
// Plats (i.e. elevator platforms) code, raising/lowering.
//
#include <stdio.h>
#include "i_system.h"
#include "z_zone.h"
#include "m_random.h"
#include "doomdef.h"
#include "p_local.h"
#include "s_sound.h"
// State.
#include "doomstat.h"
#include "r_state.h"
// Data.
#include "sounds.h"
plat_t* activeplats[MAXPLATS];
//
// Move a plat up and down
//
void T_PlatRaise(plat_t* plat)
{
result_e res;
switch(plat->status)
{
case up:
res = T_MovePlane(plat->sector,
plat->speed,
plat->high,
plat->crush,0,1);
if (plat->type == raiseAndChange
|| plat->type == raiseToNearestAndChange)
{
if (!(leveltime&7))
S_StartSound(&plat->sector->soundorg, sfx_stnmov);
}
if (res == crushed && (!plat->crush))
{
plat->count = plat->wait;
plat->status = down;
S_StartSound(&plat->sector->soundorg, sfx_pstart);
}
else
{
if (res == pastdest)
{
plat->count = plat->wait;
plat->status = waiting;
S_StartSound(&plat->sector->soundorg, sfx_pstop);
switch(plat->type)
{
case blazeDWUS:
case downWaitUpStay:
P_RemoveActivePlat(plat);
break;
case raiseAndChange:
case raiseToNearestAndChange:
P_RemoveActivePlat(plat);
break;
default:
break;
}
}
}
break;
case down:
res = T_MovePlane(plat->sector,plat->speed,plat->low,false,0,-1);
if (res == pastdest)
{
plat->count = plat->wait;
plat->status = waiting;
S_StartSound(&plat->sector->soundorg,sfx_pstop);
}
break;
case waiting:
if (!--plat->count)
{
if (plat->sector->floorheight == plat->low)
plat->status = up;
else
plat->status = down;
S_StartSound(&plat->sector->soundorg,sfx_pstart);
}
case in_stasis:
break;
}
}
//
// Do Platforms
// "amount" is only used for SOME platforms.
//
int
EV_DoPlat
( line_t* line,
plattype_e type,
int amount )
{
plat_t* plat;
int secnum;
int rtn;
sector_t* sec;
secnum = -1;
rtn = 0;
// Activate all <type> plats that are in_stasis
switch(type)
{
case perpetualRaise:
P_ActivateInStasis(line->tag);
break;
default:
break;
}
while ((secnum = P_FindSectorFromLineTag(line,secnum)) >= 0)
{
sec = §ors[secnum];
if (sec->specialdata)
continue;
// Find lowest & highest floors around sector
rtn = 1;
plat = Z_Malloc( sizeof(*plat), PU_LEVSPEC, 0);
P_AddThinker(&plat->thinker);
plat->type = type;
plat->sector = sec;
plat->sector->specialdata = plat;
plat->thinker.function.acp1 = (actionf_p1) T_PlatRaise;
plat->crush = false;
plat->tag = line->tag;
switch(type)
{
case raiseToNearestAndChange:
plat->speed = PLATSPEED/2;
sec->floorpic = sides[line->sidenum[0]].sector->floorpic;
plat->high = P_FindNextHighestFloor(sec,sec->floorheight);
plat->wait = 0;
plat->status = up;
// NO MORE DAMAGE, IF APPLICABLE
sec->special = 0;
S_StartSound(&sec->soundorg,sfx_stnmov);
break;
case raiseAndChange:
plat->speed = PLATSPEED/2;
sec->floorpic = sides[line->sidenum[0]].sector->floorpic;
plat->high = sec->floorheight + amount*FRACUNIT;
plat->wait = 0;
plat->status = up;
S_StartSound(&sec->soundorg,sfx_stnmov);
break;
case downWaitUpStay:
plat->speed = PLATSPEED * 4;
plat->low = P_FindLowestFloorSurrounding(sec);
if (plat->low > sec->floorheight)
plat->low = sec->floorheight;
plat->high = sec->floorheight;
plat->wait = TICRATE*PLATWAIT;
plat->status = down;
S_StartSound(&sec->soundorg,sfx_pstart);
break;
case blazeDWUS:
plat->speed = PLATSPEED * 8;
plat->low = P_FindLowestFloorSurrounding(sec);
if (plat->low > sec->floorheight)
plat->low = sec->floorheight;
plat->high = sec->floorheight;
plat->wait = TICRATE*PLATWAIT;
plat->status = down;
S_StartSound(&sec->soundorg,sfx_pstart);
break;
case perpetualRaise:
plat->speed = PLATSPEED;
plat->low = P_FindLowestFloorSurrounding(sec);
if (plat->low > sec->floorheight)
plat->low = sec->floorheight;
plat->high = P_FindHighestFloorSurrounding(sec);
if (plat->high < sec->floorheight)
plat->high = sec->floorheight;
plat->wait = TICRATE*PLATWAIT;
plat->status = P_Random()&1;
S_StartSound(&sec->soundorg,sfx_pstart);
break;
}
P_AddActivePlat(plat);
}
return rtn;
}
void P_ActivateInStasis(int tag)
{
int i;
for (i = 0;i < MAXPLATS;i++)
if (activeplats[i]
&& (activeplats[i])->tag == tag
&& (activeplats[i])->status == in_stasis)
{
(activeplats[i])->status = (activeplats[i])->oldstatus;
(activeplats[i])->thinker.function.acp1
= (actionf_p1) T_PlatRaise;
}
}
void EV_StopPlat(line_t* line)
{
int j;
for (j = 0;j < MAXPLATS;j++)
if (activeplats[j]
&& ((activeplats[j])->status != in_stasis)
&& ((activeplats[j])->tag == line->tag))
{
(activeplats[j])->oldstatus = (activeplats[j])->status;
(activeplats[j])->status = in_stasis;
(activeplats[j])->thinker.function.acv = (actionf_v)NULL;
}
}
void P_AddActivePlat(plat_t* plat)
{
int i;
for (i = 0;i < MAXPLATS;i++)
if (activeplats[i] == NULL)
{
activeplats[i] = plat;
return;
}
I_Error ("P_AddActivePlat: no more plats!");
}
void P_RemoveActivePlat(plat_t* plat)
{
int i;
for (i = 0;i < MAXPLATS;i++)
if (plat == activeplats[i])
{
(activeplats[i])->sector->specialdata = NULL;
P_RemoveThinker(&(activeplats[i])->thinker);
activeplats[i] = NULL;
return;
}
I_Error ("P_RemoveActivePlat: can't find plat!");
}