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p_ceilng.pas
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p_ceilng.pas
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//------------------------------------------------------------------------------
//
// FPCDoom - Port of Doom to Free Pascal Compiler
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 2004-2007 by Jim Valavanis
// Copyright (C) 2017-2022 by Jim Valavanis
//
// 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., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//------------------------------------------------------------------------------
// E-Mail: jimmyvalavanis@yahoo.gr
// Site : https://sourceforge.net/projects/fpcdoom/
//------------------------------------------------------------------------------
{$I FPCDoom.inc}
unit p_ceilng;
interface
uses
z_memory,
p_spec,
r_defs,
s_sound,
// Data.
sounds;
var
activeceilings: array[0..MAXCEILINGS - 1] of Pceiling_t;
//==============================================================================
//
// T_MoveCeiling
//
//==============================================================================
procedure T_MoveCeiling(ceiling: Pceiling_t);
//==============================================================================
//
// EV_DoCeiling
//
//==============================================================================
function EV_DoCeiling(line: Pline_t; _type: ceiling_e): integer;
//==============================================================================
//
// P_AddActiveCeiling
//
//==============================================================================
procedure P_AddActiveCeiling(c: Pceiling_t);
//==============================================================================
//
// EV_CeilingCrushStop
//
//==============================================================================
function EV_CeilingCrushStop(line: Pline_t): integer;
implementation
uses
m_fixed,
p_mobj_h,
p_tick,
p_setup,
p_floor;
//==============================================================================
// P_AddActiveCeiling
//
// Add an active ceiling
//
//==============================================================================
procedure P_AddActiveCeiling(c: Pceiling_t);
var
i: integer;
begin
for i := 0 to MAXCEILINGS - 1 do
if activeceilings[i] = nil then
begin
activeceilings[i] := c;
exit;
end;
end;
//==============================================================================
// P_RemoveActiveCeiling
//
// Remove a ceiling's thinker
//
//==============================================================================
procedure P_RemoveActiveCeiling(c: Pceiling_t);
var
i: integer;
begin
for i := 0 to MAXCEILINGS - 1 do
if activeceilings[i] = c then
begin
activeceilings[i].sector.specialdata := nil;
P_RemoveThinker(@activeceilings[i].thinker);
activeceilings[i] := nil;
exit;
end;
end;
//==============================================================================
// P_ActivateInStasisCeiling
//
// Restart a ceiling that's in-stasis
//
//==============================================================================
procedure P_ActivateInStasisCeiling(line: Pline_t);
var
i: integer;
begin
for i := 0 to MAXCEILINGS - 1 do
if (activeceilings[i] <> nil) and
(activeceilings[i].tag = line.tag) and
(activeceilings[i].direction = 0) then
begin
activeceilings[i].direction := activeceilings[i].olddirection;
activeceilings[i].thinker._function.acp1 := @T_MoveCeiling;
end;
end;
//==============================================================================
//
// T_MoveCeiling
//
//==============================================================================
procedure T_MoveCeiling(ceiling: Pceiling_t);
var
res: result_e;
begin
case ceiling.direction of
0:
// IN STASIS
begin
end;
1:
// UP
begin
res := T_MovePlane(ceiling.sector,
ceiling.speed,
ceiling.topheight,
false, 1, ceiling.direction);
if leveltime and 7 = 0 then
begin
if ceiling._type <> silentCrushAndRaise then
S_StartSound(Pmobj_t(@ceiling.sector.soundorg),
Ord(sfx_stnmov));
end;
if res = pastdest then
begin
case ceiling._type of
raiseToHighest:
P_RemoveActiveCeiling(ceiling);
silentCrushAndRaise:
begin
S_StartSound(Pmobj_t(@ceiling.sector.soundorg), Ord(sfx_pstop));
ceiling.direction := -1;
end;
fastCrushAndRaise,
crushAndRaise:
ceiling.direction := -1;
end;
end;
end;
-1:
// DOWN
begin
res := T_MovePlane(ceiling.sector,
ceiling.speed,
ceiling.bottomheight,
ceiling.crush, 1, ceiling.direction);
if leveltime and 7 = 0 then
begin
if ceiling._type <> silentCrushAndRaise then
S_StartSound(Pmobj_t(@ceiling.sector.soundorg), Ord(sfx_stnmov));
end;
if res = pastdest then
begin
case ceiling._type of
silentCrushAndRaise:
begin
S_StartSound(Pmobj_t(@ceiling.sector.soundorg), Ord(sfx_pstop));
ceiling.speed := CEILSPEED;
ceiling.direction := 1;
end;
crushAndRaise:
begin
ceiling.speed := CEILSPEED;
ceiling.direction := 1;
end;
fastCrushAndRaise:
begin
ceiling.direction := 1;
end;
lowerAndCrush,
lowerToFloor:
P_RemoveActiveCeiling(ceiling);
end;
end
else // ( res <> pastdest )
begin
if res = crushed then
begin
case ceiling._type of
silentCrushAndRaise,
crushAndRaise,
lowerAndCrush:
ceiling.speed := CEILSPEED div 8;
end;
end;
end;
end;
end;
end;
//==============================================================================
//
// EV_DoCeiling
// Move a ceiling up/down and all around!
//
//==============================================================================
function EV_DoCeiling(line: Pline_t; _type: ceiling_e): integer;
var
initial: boolean;
secnum: integer;
sec: Psector_t;
ceiling: Pceiling_t;
begin
secnum := -1;
result := 0;
// Reactivate in-stasis ceilings...for certain types.
case _type of
fastCrushAndRaise,
silentCrushAndRaise,
crushAndRaise:
P_ActivateInStasisCeiling(line);
end;
initial := true;
while (secnum >= 0) or initial do
begin
initial := false;
secnum := P_FindSectorFromLineTag(line, secnum);
if secnum < 0 then
break;
sec := @sectors[secnum];
if sec.specialdata <> nil then
continue;
// new door thinker
result := 1;
ceiling := Z_Malloc(SizeOf(ceiling_t), PU_LEVSPEC, nil);
P_AddThinker(@ceiling.thinker);
sec.specialdata := ceiling;
ceiling.thinker._function.acp1 := @T_MoveCeiling;
ceiling.sector := sec;
ceiling.crush := false;
case _type of
fastCrushAndRaise:
begin
ceiling.crush := true;
ceiling.topheight := sec.ceilingheight;
ceiling.bottomheight := sec.floorheight + (8 * FRACUNIT);
ceiling.direction := -1;
ceiling.speed := CEILSPEED * 2;
end;
silentCrushAndRaise,
crushAndRaise:
begin
ceiling.crush := true;
ceiling.topheight := sec.ceilingheight;
ceiling.bottomheight := sec.floorheight;
if _type <> lowerToFloor then
ceiling.bottomheight := ceiling.bottomheight + 8 * FRACUNIT;
ceiling.direction := -1;
ceiling.speed := CEILSPEED;
end;
lowerAndCrush,
lowerToFloor:
begin
ceiling.bottomheight := sec.floorheight;
if _type <> lowerToFloor then
ceiling.bottomheight := ceiling.bottomheight + 8 * FRACUNIT;
ceiling.direction := -1;
ceiling.speed := CEILSPEED;
end;
raiseToHighest:
begin
ceiling.topheight := P_FindHighestCeilingSurrounding(sec);
ceiling.direction := 1;
ceiling.speed := CEILSPEED;
end;
end;
ceiling.tag := sec.tag;
ceiling._type := _type;
P_AddActiveCeiling(ceiling);
end;
end;
//==============================================================================
//
// EV_CeilingCrushStop
// Stop a ceiling from crushing!
//
//==============================================================================
function EV_CeilingCrushStop(line: Pline_t): integer;
var
i: integer;
begin
result := 0;
for i := 0 to MAXCEILINGS - 1 do
if (activeceilings[i] <> nil) and
(activeceilings[i].tag = line.tag) and
(activeceilings[i].direction <> 0) then
begin
activeceilings[i].olddirection := activeceilings[i].direction;
activeceilings[i].thinker._function.acv := nil;
activeceilings[i].direction := 0; // in-stasis
result := 1;
end;
end;
end.