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-rw-r--r--src/doom/p_lights.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/src/doom/p_lights.c b/src/doom/p_lights.c
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+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2005 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.
+//
+// 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.
+//
+// DESCRIPTION:
+// Handle Sector base lighting effects.
+// Muzzle flash?
+//
+//-----------------------------------------------------------------------------
+
+
+
+#include "z_zone.h"
+#include "m_random.h"
+
+#include "doomdef.h"
+#include "p_local.h"
+
+
+// State.
+#include "r_state.h"
+
+//
+// FIRELIGHT FLICKER
+//
+
+//
+// T_FireFlicker
+//
+void T_FireFlicker (fireflicker_t* flick)
+{
+ int amount;
+
+ if (--flick->count)
+ return;
+
+ amount = (P_Random()&3)*16;
+
+ if (flick->sector->lightlevel - amount < flick->minlight)
+ flick->sector->lightlevel = flick->minlight;
+ else
+ flick->sector->lightlevel = flick->maxlight - amount;
+
+ flick->count = 4;
+}
+
+
+
+//
+// P_SpawnFireFlicker
+//
+void P_SpawnFireFlicker (sector_t* sector)
+{
+ fireflicker_t* flick;
+
+ // Note that we are resetting sector attributes.
+ // Nothing special about it during gameplay.
+ sector->special = 0;
+
+ flick = Z_Malloc ( sizeof(*flick), PU_LEVSPEC, 0);
+
+ P_AddThinker (&flick->thinker);
+
+ flick->thinker.function.acp1 = (actionf_p1) T_FireFlicker;
+ flick->sector = sector;
+ flick->maxlight = sector->lightlevel;
+ flick->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel)+16;
+ flick->count = 4;
+}
+
+
+
+//
+// BROKEN LIGHT FLASHING
+//
+
+
+//
+// T_LightFlash
+// Do flashing lights.
+//
+void T_LightFlash (lightflash_t* flash)
+{
+ if (--flash->count)
+ return;
+
+ if (flash->sector->lightlevel == flash->maxlight)
+ {
+ flash-> sector->lightlevel = flash->minlight;
+ flash->count = (P_Random()&flash->mintime)+1;
+ }
+ else
+ {
+ flash-> sector->lightlevel = flash->maxlight;
+ flash->count = (P_Random()&flash->maxtime)+1;
+ }
+
+}
+
+
+
+
+//
+// P_SpawnLightFlash
+// After the map has been loaded, scan each sector
+// for specials that spawn thinkers
+//
+void P_SpawnLightFlash (sector_t* sector)
+{
+ lightflash_t* flash;
+
+ // nothing special about it during gameplay
+ sector->special = 0;
+
+ flash = Z_Malloc ( sizeof(*flash), PU_LEVSPEC, 0);
+
+ P_AddThinker (&flash->thinker);
+
+ flash->thinker.function.acp1 = (actionf_p1) T_LightFlash;
+ flash->sector = sector;
+ flash->maxlight = sector->lightlevel;
+
+ flash->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel);
+ flash->maxtime = 64;
+ flash->mintime = 7;
+ flash->count = (P_Random()&flash->maxtime)+1;
+}
+
+
+
+//
+// STROBE LIGHT FLASHING
+//
+
+
+//
+// T_StrobeFlash
+//
+void T_StrobeFlash (strobe_t* flash)
+{
+ if (--flash->count)
+ return;
+
+ if (flash->sector->lightlevel == flash->minlight)
+ {
+ flash-> sector->lightlevel = flash->maxlight;
+ flash->count = flash->brighttime;
+ }
+ else
+ {
+ flash-> sector->lightlevel = flash->minlight;
+ flash->count =flash->darktime;
+ }
+
+}
+
+
+
+//
+// P_SpawnStrobeFlash
+// After the map has been loaded, scan each sector
+// for specials that spawn thinkers
+//
+void
+P_SpawnStrobeFlash
+( sector_t* sector,
+ int fastOrSlow,
+ int inSync )
+{
+ strobe_t* flash;
+
+ flash = Z_Malloc ( sizeof(*flash), PU_LEVSPEC, 0);
+
+ P_AddThinker (&flash->thinker);
+
+ flash->sector = sector;
+ flash->darktime = fastOrSlow;
+ flash->brighttime = STROBEBRIGHT;
+ flash->thinker.function.acp1 = (actionf_p1) T_StrobeFlash;
+ flash->maxlight = sector->lightlevel;
+ flash->minlight = P_FindMinSurroundingLight(sector, sector->lightlevel);
+
+ if (flash->minlight == flash->maxlight)
+ flash->minlight = 0;
+
+ // nothing special about it during gameplay
+ sector->special = 0;
+
+ if (!inSync)
+ flash->count = (P_Random()&7)+1;
+ else
+ flash->count = 1;
+}
+
+
+//
+// Start strobing lights (usually from a trigger)
+//
+void EV_StartLightStrobing(line_t* line)
+{
+ int secnum;
+ sector_t* sec;
+
+ secnum = -1;
+ while ((secnum = P_FindSectorFromLineTag(line,secnum)) >= 0)
+ {
+ sec = &sectors[secnum];
+ if (sec->specialdata)
+ continue;
+
+ P_SpawnStrobeFlash (sec,SLOWDARK, 0);
+ }
+}
+
+
+
+//
+// TURN LINE'S TAG LIGHTS OFF
+//
+void EV_TurnTagLightsOff(line_t* line)
+{
+ int i;
+ int j;
+ int min;
+ sector_t* sector;
+ sector_t* tsec;
+ line_t* templine;
+
+ sector = sectors;
+
+ for (j = 0;j < numsectors; j++, sector++)
+ {
+ if (sector->tag == line->tag)
+ {
+ min = sector->lightlevel;
+ for (i = 0;i < sector->linecount; i++)
+ {
+ templine = sector->lines[i];
+ tsec = getNextSector(templine,sector);
+ if (!tsec)
+ continue;
+ if (tsec->lightlevel < min)
+ min = tsec->lightlevel;
+ }
+ sector->lightlevel = min;
+ }
+ }
+}
+
+
+//
+// TURN LINE'S TAG LIGHTS ON
+//
+void
+EV_LightTurnOn
+( line_t* line,
+ int bright )
+{
+ int i;
+ int j;
+ sector_t* sector;
+ sector_t* temp;
+ line_t* templine;
+
+ sector = sectors;
+
+ for (i=0;i<numsectors;i++, sector++)
+ {
+ if (sector->tag == line->tag)
+ {
+ // bright = 0 means to search
+ // for highest light level
+ // surrounding sector
+ if (!bright)
+ {
+ for (j = 0;j < sector->linecount; j++)
+ {
+ templine = sector->lines[j];
+ temp = getNextSector(templine,sector);
+
+ if (!temp)
+ continue;
+
+ if (temp->lightlevel > bright)
+ bright = temp->lightlevel;
+ }
+ }
+ sector-> lightlevel = bright;
+ }
+ }
+}
+
+
+//
+// Spawn glowing light
+//
+
+void T_Glow(glow_t* g)
+{
+ switch(g->direction)
+ {
+ case -1:
+ // DOWN
+ g->sector->lightlevel -= GLOWSPEED;
+ if (g->sector->lightlevel <= g->minlight)
+ {
+ g->sector->lightlevel += GLOWSPEED;
+ g->direction = 1;
+ }
+ break;
+
+ case 1:
+ // UP
+ g->sector->lightlevel += GLOWSPEED;
+ if (g->sector->lightlevel >= g->maxlight)
+ {
+ g->sector->lightlevel -= GLOWSPEED;
+ g->direction = -1;
+ }
+ break;
+ }
+}
+
+
+void P_SpawnGlowingLight(sector_t* sector)
+{
+ glow_t* g;
+
+ g = Z_Malloc( sizeof(*g), PU_LEVSPEC, 0);
+
+ P_AddThinker(&g->thinker);
+
+ g->sector = sector;
+ g->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel);
+ g->maxlight = sector->lightlevel;
+ g->thinker.function.acp1 = (actionf_p1) T_Glow;
+ g->direction = -1;
+
+ sector->special = 0;
+}
+
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