1 files changed, 437 insertions, 0 deletions

diff --git a/apps/plugins/doom/p_lights.c b/apps/plugins/doom/p_lights.c
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+++ b/apps/plugins/doom/p_lights.c
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+/* Emacs style mode select   -*- C++ -*-
+ *-----------------------------------------------------------------------------
+ *
+ *
+ *  PrBoom a Doom port merged with LxDoom and LSDLDoom
+ *  based on BOOM, a modified and improved DOOM engine
+ *  Copyright (C) 1999 by
+ *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+ *  Copyright (C) 1999-2000 by
+ *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
+ *
+ *  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:
+ *  Action routines for lighting thinkers
+ *  Spawn sector based lighting effects.
+ *  Handle lighting linedef types
+ *
+ *-----------------------------------------------------------------------------*/
+
+#include "doomstat.h" //jff 5/18/98
+#include "doomdef.h"
+#include "m_random.h"
+#include "r_main.h"
+#include "p_spec.h"
+#include "p_tick.h"
+
+//////////////////////////////////////////////////////////
+//
+// Lighting action routines, called once per tick
+//
+//////////////////////////////////////////////////////////
+
+//
+// T_FireFlicker()
+//
+// Firelight flicker action routine, called once per tick
+//
+// Passed a fireflicker_t structure containing light levels and timing
+// Returns nothing
+//
+void T_FireFlicker (fireflicker_t* flick)
+{
+   int amount;
+
+   if (--flick->count)
+      return;
+
+   amount = (P_Random(pr_lights)&3)*16;
+
+   if (flick->sector->lightlevel - amount < flick->minlight)
+      flick->sector->lightlevel = flick->minlight;
+   else
+      flick->sector->lightlevel = flick->maxlight - amount;
+
+   flick->count = 4;
+}
+
+//
+// T_LightFlash()
+//
+// Broken light flashing action routine, called once per tick
+//
+// Passed a lightflash_t structure containing light levels and timing
+// Returns nothing
+//
+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(pr_lights)&flash->mintime)+1;
+   }
+   else
+   {
+      flash-> sector->lightlevel = flash->maxlight;
+      flash->count = (P_Random(pr_lights)&flash->maxtime)+1;
+   }
+
+}
+
+//
+// T_StrobeFlash()
+//
+// Strobe light flashing action routine, called once per tick
+//
+// Passed a strobe_t structure containing light levels and timing
+// Returns nothing
+//
+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;
+   }
+}
+
+//
+// T_Glow()
+//
+// Glowing light action routine, called once per tick
+//
+// Passed a glow_t structure containing light levels and timing
+// Returns nothing
+//
+
+void T_Glow(glow_t* g)
+{
+   switch(g->direction)
+   {
+   case -1:
+      // light dims
+      g->sector->lightlevel -= GLOWSPEED;
+      if (g->sector->lightlevel <= g->minlight)
+      {
+         g->sector->lightlevel += GLOWSPEED;
+         g->direction = 1;
+      }
+      break;
+
+   case 1:
+      // light brightens
+      g->sector->lightlevel += GLOWSPEED;
+      if (g->sector->lightlevel >= g->maxlight)
+      {
+         g->sector->lightlevel -= GLOWSPEED;
+         g->direction = -1;
+      }
+      break;
+   }
+}
+
+//////////////////////////////////////////////////////////
+//
+// Sector lighting type spawners
+//
+// After the map has been loaded, each sector is scanned
+// for specials that spawn thinkers
+//
+//////////////////////////////////////////////////////////
+
+//
+// P_SpawnFireFlicker()
+//
+// Spawns a fire flicker lighting thinker
+//
+// Passed the sector that spawned the thinker
+// Returns nothing
+//
+void P_SpawnFireFlicker (sector_t*  sector)
+{
+   fireflicker_t*  flick;
+
+   // Note that we are resetting sector attributes.
+   // Nothing special about it during gameplay.
+   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type
+
+   flick = Z_Malloc ( sizeof(*flick), PU_LEVSPEC, 0);
+
+   P_AddThinker (&flick->thinker);
+
+   flick->thinker.function = T_FireFlicker;
+   flick->sector = sector;
+   flick->maxlight = sector->lightlevel;
+   flick->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel)+16;
+   flick->count = 4;
+}
+
+//
+// P_SpawnLightFlash()
+//
+// Spawns a broken light flash lighting thinker
+//
+// Passed the sector that spawned the thinker
+// Returns nothing
+//
+void P_SpawnLightFlash (sector_t* sector)
+{
+   lightflash_t* flash;
+
+   // nothing special about it during gameplay
+   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type
+
+   flash = Z_Malloc ( sizeof(*flash), PU_LEVSPEC, 0);
+
+   P_AddThinker (&flash->thinker);
+
+   flash->thinker.function = 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(pr_lights)&flash->maxtime)+1;
+}
+
+//
+// P_SpawnStrobeFlash
+//
+// Spawns a blinking light thinker
+//
+// Passed the sector that spawned the thinker, speed of blinking
+// and whether blinking is to by syncrhonous with other sectors
+//
+// Returns nothing
+//
+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 = 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 &= ~31; //jff 3/14/98 clear non-generalized sector type
+
+   if (!inSync)
+      flash->count = (P_Random(pr_lights)&7)+1;
+   else
+      flash->count = 1;
+}
+
+//
+// P_SpawnGlowingLight()
+//
+// Spawns a glowing light (smooth oscillation from min to max) thinker
+//
+// Passed the sector that spawned the thinker
+// Returns nothing
+//
+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 = T_Glow;
+   g->direction = -1;
+
+   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type
+}
+
+//////////////////////////////////////////////////////////
+//
+// Linedef lighting function handlers
+//
+//////////////////////////////////////////////////////////
+
+//
+// EV_StartLightStrobing()
+//
+// Start strobing lights (usually from a trigger)
+//
+// Passed the line that activated the strobing
+// Returns true
+//
+// jff 2/12/98 added int return value, fixed return
+//
+int EV_StartLightStrobing(line_t* line)
+{
+   int   secnum;
+   sector_t* sec;
+
+   secnum = -1;
+   // start lights strobing in all sectors tagged same as line
+   while ((secnum = P_FindSectorFromLineTag(line,secnum)) >= 0)
+   {
+      sec = &sectors[secnum];
+      // if already doing a lighting function, don't start a second
+      if (P_SectorActive(lighting_special,sec)) //jff 2/22/98
+         continue;
+
+      P_SpawnStrobeFlash (sec,SLOWDARK, 0);
+   }
+   return 1;
+}
+
+//
+// EV_TurnTagLightsOff()
+//
+// Turn line's tagged sector's lights to min adjacent neighbor level
+//
+// Passed the line that activated the lights being turned off
+// Returns true
+//
+// jff 2/12/98 added int return value, fixed return
+//
+int EV_TurnTagLightsOff(line_t* line)
+{
+   int j;
+
+   // search sectors for those with same tag as activating line
+
+   // killough 10/98: replaced inefficient search with fast search
+   for (j = -1; (j = P_FindSectorFromLineTag(line,j)) >= 0;)
+   {
+      sector_t *sector = sectors + j, *tsec;
+      int i, min = sector->lightlevel;
+      // find min neighbor light level
+      for (i = 0;i < sector->linecount; i++)
+         if ((tsec = getNextSector(sector->lines[i], sector)) &&
+               tsec->lightlevel < min)
+            min = tsec->lightlevel;
+      sector->lightlevel = min;
+   }
+   return 1;
+}
+
+//
+// EV_LightTurnOn()
+//
+// Turn sectors tagged to line lights on to specified or max neighbor level
+//
+// Passed the activating line, and a level to set the light to
+// If level passed is 0, the maximum neighbor lighting is used
+// Returns true
+//
+// jff 2/12/98 added int return value, fixed return
+//
+int EV_LightTurnOn(line_t *line, int bright)
+{
+   int i;
+
+   // search all sectors for ones with same tag as activating line
+
+   // killough 10/98: replace inefficient search with fast search
+   for (i = -1; (i = P_FindSectorFromLineTag(line,i)) >= 0;)
+   {
+      sector_t *temp, *sector = sectors+i;
+      int j, tbright = bright; //jff 5/17/98 search for maximum PER sector
+
+      // bright = 0 means to search for highest light level surrounding sector
+
+      if (!bright)
+         for (j = 0;j < sector->linecount; j++)
+            if ((temp = getNextSector(sector->lines[j],sector)) &&
+                  temp->lightlevel > tbright)
+               tbright = temp->lightlevel;
+
+      sector->lightlevel = tbright;
+
+      //jff 5/17/98 unless compatibility optioned
+      //then maximum near ANY tagged sector
+      if (comp[comp_model])
+         bright = tbright;
+   }
+   return 1;
+}
+
+/* killough 10/98:
+ *
+ * EV_LightTurnOnPartway()
+ *
+ * Turn sectors tagged to line lights on to specified or max neighbor level
+ *
+ * Passed the activating line, and a light level fraction between 0 and 1.
+ * Sets the light to min on 0, max on 1, and interpolates in-between.
+ * Used for doors with gradual lighting effects.
+ *
+ * Returns true
+ */
+
+int EV_LightTurnOnPartway(line_t *line, fixed_t level)
+{
+   int i;
+
+   if (level < 0)          // clip at extremes
+      level = 0;
+   if (level > FRACUNIT)
+      level = FRACUNIT;
+
+   // search all sectors for ones with same tag as activating line
+   for (i = -1; (i = P_FindSectorFromLineTag(line,i)) >= 0;)
+   {
+      sector_t *temp, *sector = sectors+i;
+      int j, bright = 0, min = sector->lightlevel;
+
+      for (j = 0; j < sector->linecount; j++)
+         if ((temp = getNextSector(sector->lines[j],sector)))
+         {
+            if (temp->lightlevel > bright)
+               bright = temp->lightlevel;
+            if (temp->lightlevel < min)
+               min = temp->lightlevel;
+         }
+
+      sector->lightlevel =   // Set level in-between extremes
+         (level * bright + (FRACUNIT-level) * min) >> FRACBITS;
+   }
+   return 1;
+}
+