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807 lines
18 KiB
C++
807 lines
18 KiB
C++
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// $Id:$
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//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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// This source is available for distribution and/or modification
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// only under the terms of the DOOM Source Code License as
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// published by id Software. All rights reserved.
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//
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// The source is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
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// for more details.
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//
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// $Log:$
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//
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// DESCRIPTION:
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// Sector utility functions.
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//
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//-----------------------------------------------------------------------------
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#include "p_spec.h"
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#include "c_cvars.h"
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#include "doomstat.h"
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#include "r_main.h"
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#include "resources/colormaps.h"
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// [RH]
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// P_NextSpecialSector()
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//
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// Returns the next special sector attached to this sector
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// with a certain special.
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sector_t *sector_t::NextSpecialSector (int type, sector_t *nogood) const
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{
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sector_t *tsec;
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int i;
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for (i = 0; i < linecount; i++)
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{
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line_t *ln = lines[i];
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if (NULL != (tsec = getNextSector (ln, this)) &&
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tsec != nogood &&
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(tsec->special & 0x00ff) == type)
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{
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return tsec;
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}
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}
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return NULL;
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}
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//
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// P_FindLowestFloorSurrounding()
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// FIND LOWEST FLOOR HEIGHT IN SURROUNDING SECTORS
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//
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fixed_t sector_t::FindLowestFloorSurrounding (vertex_t **v) const
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{
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int i;
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sector_t *other;
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line_t *check;
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fixed_t floor;
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fixed_t ofloor;
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vertex_t *spot;
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if (linecount == 0) return GetPlaneTexZ(sector_t::floor);
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spot = lines[0]->v1;
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floor = floorplane.ZatPoint (spot);
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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ofloor = other->floorplane.ZatPoint (check->v1);
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if (ofloor < floor && ofloor < floorplane.ZatPoint (check->v1))
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{
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floor = ofloor;
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spot = check->v1;
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}
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ofloor = other->floorplane.ZatPoint (check->v2);
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if (ofloor < floor && ofloor < floorplane.ZatPoint (check->v2))
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{
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floor = ofloor;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return floor;
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}
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//
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// P_FindHighestFloorSurrounding()
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// FIND HIGHEST FLOOR HEIGHT IN SURROUNDING SECTORS
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//
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fixed_t sector_t::FindHighestFloorSurrounding (vertex_t **v) const
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{
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int i;
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line_t *check;
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sector_t *other;
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fixed_t floor;
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fixed_t ofloor;
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vertex_t *spot;
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if (linecount == 0) return GetPlaneTexZ(sector_t::floor);
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spot = lines[0]->v1;
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floor = FIXED_MIN;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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ofloor = other->floorplane.ZatPoint (check->v1);
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if (ofloor > floor)
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{
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floor = ofloor;
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spot = check->v1;
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}
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ofloor = other->floorplane.ZatPoint (check->v2);
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if (ofloor > floor)
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{
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floor = ofloor;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return floor;
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}
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//
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// P_FindNextHighestFloor()
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//
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// Passed a sector and a floor height, returns the fixed point value
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// of the smallest floor height in a surrounding sector larger than
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// the floor height passed. If no such height exists the floorheight
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// passed is returned.
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//
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// Rewritten by Lee Killough to avoid fixed array and to be faster
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//
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fixed_t sector_t::FindNextHighestFloor (vertex_t **v) const
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{
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fixed_t height;
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fixed_t heightdiff;
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fixed_t ofloor, floor;
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sector_t *other;
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vertex_t *spot;
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line_t *check;
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int i;
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if (linecount == 0) return GetPlaneTexZ(sector_t::floor);
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spot = lines[0]->v1;
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height = floorplane.ZatPoint (spot);
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heightdiff = FIXED_MAX;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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ofloor = other->floorplane.ZatPoint (check->v1);
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floor = floorplane.ZatPoint (check->v1);
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if (ofloor > floor && ofloor - floor < heightdiff && !IsLinked(other, false))
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{
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heightdiff = ofloor - floor;
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height = ofloor;
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spot = check->v1;
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}
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ofloor = other->floorplane.ZatPoint (check->v2);
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floor = floorplane.ZatPoint (check->v2);
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if (ofloor > floor && ofloor - floor < heightdiff && !IsLinked(other, false))
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{
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heightdiff = ofloor - floor;
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height = ofloor;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return height;
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}
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//
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// P_FindNextLowestFloor()
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//
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// Passed a sector and a floor height, returns the fixed point value
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// of the largest floor height in a surrounding sector smaller than
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// the floor height passed. If no such height exists the floorheight
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// passed is returned.
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//
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// jff 02/03/98 Twiddled Lee's P_FindNextHighestFloor to make this
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//
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fixed_t sector_t::FindNextLowestFloor (vertex_t **v) const
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{
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fixed_t height;
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fixed_t heightdiff;
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fixed_t ofloor, floor;
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sector_t *other;
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vertex_t *spot;
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line_t *check;
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int i;
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if (linecount == 0) return GetPlaneTexZ(sector_t::floor);
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spot = lines[0]->v1;
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height = floorplane.ZatPoint (spot);
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heightdiff = FIXED_MAX;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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if (other - sectors == 6)
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other = other;
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ofloor = other->floorplane.ZatPoint (check->v1);
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floor = floorplane.ZatPoint (check->v1);
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if (ofloor < floor && floor - ofloor < heightdiff && !IsLinked(other, false))
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{
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heightdiff = floor - ofloor;
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height = ofloor;
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spot = check->v1;
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}
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ofloor = other->floorplane.ZatPoint (check->v2);
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floor = floorplane.ZatPoint (check->v2);
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if (ofloor < floor && floor - ofloor < heightdiff && !IsLinked(other, false))
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{
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heightdiff = floor - ofloor;
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height = ofloor;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return height;
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}
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//
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// P_FindNextLowestCeiling()
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//
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// Passed a sector and a ceiling height, returns the fixed point value
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// of the largest ceiling height in a surrounding sector smaller than
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// the ceiling height passed. If no such height exists the ceiling height
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// passed is returned.
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//
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// jff 02/03/98 Twiddled Lee's P_FindNextHighestFloor to make this
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//
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fixed_t sector_t::FindNextLowestCeiling (vertex_t **v) const
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{
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fixed_t height;
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fixed_t heightdiff;
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fixed_t oceil, ceil;
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sector_t *other;
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vertex_t *spot;
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line_t *check;
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int i;
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if (linecount == 0) return GetPlaneTexZ(sector_t::ceiling);
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spot = lines[0]->v1;
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height = ceilingplane.ZatPoint (spot);
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heightdiff = FIXED_MAX;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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oceil = other->ceilingplane.ZatPoint (check->v1);
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ceil = ceilingplane.ZatPoint (check->v1);
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if (oceil < ceil && ceil - oceil < heightdiff && !IsLinked(other, true))
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{
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heightdiff = ceil - oceil;
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height = oceil;
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spot = check->v1;
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}
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oceil = other->ceilingplane.ZatPoint (check->v2);
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ceil = ceilingplane.ZatPoint (check->v2);
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if (oceil < ceil && ceil - oceil < heightdiff && !IsLinked(other, true))
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{
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heightdiff = ceil - oceil;
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height = oceil;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return height;
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}
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//
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// P_FindNextHighestCeiling()
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//
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// Passed a sector and a ceiling height, returns the fixed point value
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// of the smallest ceiling height in a surrounding sector larger than
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// the ceiling height passed. If no such height exists the ceiling height
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// passed is returned.
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//
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// jff 02/03/98 Twiddled Lee's P_FindNextHighestFloor to make this
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//
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fixed_t sector_t::FindNextHighestCeiling (vertex_t **v) const
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{
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fixed_t height;
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fixed_t heightdiff;
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fixed_t oceil, ceil;
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sector_t *other;
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vertex_t *spot;
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line_t *check;
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int i;
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if (linecount == 0) return GetPlaneTexZ(sector_t::ceiling);
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spot = lines[0]->v1;
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height = ceilingplane.ZatPoint (spot);
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heightdiff = FIXED_MAX;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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oceil = other->ceilingplane.ZatPoint (check->v1);
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ceil = ceilingplane.ZatPoint (check->v1);
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if (oceil > ceil && oceil - ceil < heightdiff && !IsLinked(other, true))
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{
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heightdiff = oceil - ceil;
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height = oceil;
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spot = check->v1;
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}
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oceil = other->ceilingplane.ZatPoint (check->v2);
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ceil = ceilingplane.ZatPoint (check->v2);
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if (oceil > ceil && oceil - ceil < heightdiff && !IsLinked(other, true))
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{
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heightdiff = oceil - ceil;
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height = oceil;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return height;
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}
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//
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// FIND LOWEST CEILING IN THE SURROUNDING SECTORS
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//
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fixed_t sector_t::FindLowestCeilingSurrounding (vertex_t **v) const
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{
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fixed_t height;
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fixed_t oceil;
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sector_t *other;
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vertex_t *spot;
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line_t *check;
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int i;
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if (linecount == 0) return GetPlaneTexZ(sector_t::ceiling);
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spot = lines[0]->v1;
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height = FIXED_MAX;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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oceil = other->ceilingplane.ZatPoint (check->v1);
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if (oceil < height)
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{
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height = oceil;
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spot = check->v1;
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}
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oceil = other->ceilingplane.ZatPoint (check->v2);
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if (oceil < height)
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{
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height = oceil;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return height;
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}
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//
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// FIND HIGHEST CEILING IN THE SURROUNDING SECTORS
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//
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fixed_t sector_t::FindHighestCeilingSurrounding (vertex_t **v) const
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{
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fixed_t height;
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fixed_t oceil;
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sector_t *other;
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vertex_t *spot;
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line_t *check;
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int i;
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if (linecount == 0) return GetPlaneTexZ(sector_t::ceiling);
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spot = lines[0]->v1;
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height = FIXED_MIN;
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for (i = 0; i < linecount; i++)
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{
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check = lines[i];
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if (NULL != (other = getNextSector (check, this)))
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{
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oceil = other->ceilingplane.ZatPoint (check->v1);
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if (oceil > height)
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{
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height = oceil;
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spot = check->v1;
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}
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oceil = other->ceilingplane.ZatPoint (check->v2);
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if (oceil > height)
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{
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height = oceil;
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spot = check->v2;
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}
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}
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}
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if (v != NULL)
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*v = spot;
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return height;
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}
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//
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// P_FindShortestTextureAround()
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//
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// Passed a sector number, returns the shortest lower texture on a
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// linedef bounding the sector.
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//
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// jff 02/03/98 Add routine to find shortest lower texture
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//
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static inline void CheckShortestTex (FTextureID texnum, fixed_t &minsize)
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{
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if (texnum.isValid() || (texnum.isNull() && (i_compatflags & COMPATF_SHORTTEX)))
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{
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FTexture *tex = TexMan[texnum];
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if (tex != NULL)
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{
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fixed_t h = tex->GetScaledHeight()<<FRACBITS;
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if (h < minsize)
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{
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minsize = h;
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}
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}
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}
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}
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fixed_t sector_t::FindShortestTextureAround () const
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{
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fixed_t minsize = FIXED_MAX;
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for (int i = 0; i < linecount; i++)
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{
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if (lines[i]->flags & ML_TWOSIDED)
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{
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CheckShortestTex (lines[i]->sidedef[0]->GetTexture(side_t::bottom), minsize);
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CheckShortestTex (lines[i]->sidedef[1]->GetTexture(side_t::bottom), minsize);
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}
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}
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return minsize < FIXED_MAX ? minsize : TexMan[0]->GetHeight() * FRACUNIT;
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}
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//
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// P_FindShortestUpperAround()
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//
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// Passed a sector number, returns the shortest upper texture on a
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// linedef bounding the sector.
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//
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// Note: If no upper texture exists MAXINT is returned.
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//
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// jff 03/20/98 Add routine to find shortest upper texture
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//
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fixed_t sector_t::FindShortestUpperAround () const
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{
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fixed_t minsize = FIXED_MAX;
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for (int i = 0; i < linecount; i++)
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{
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if (lines[i]->flags & ML_TWOSIDED)
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{
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CheckShortestTex (lines[i]->sidedef[0]->GetTexture(side_t::top), minsize);
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CheckShortestTex (lines[i]->sidedef[1]->GetTexture(side_t::top), minsize);
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}
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}
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return minsize < FIXED_MAX ? minsize : TexMan[0]->GetHeight() * FRACUNIT;
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}
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//
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// P_FindModelFloorSector()
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//
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// Passed a floor height and a sector number, return a pointer to a
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// a sector with that floor height across the lowest numbered two sided
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// line surrounding the sector.
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//
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// Note: If no sector at that height bounds the sector passed, return NULL
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//
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// jff 02/03/98 Add routine to find numeric model floor
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// around a sector specified by sector number
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// jff 3/14/98 change first parameter to plain height to allow call
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// from routine not using floormove_t
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//
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sector_t *sector_t::FindModelFloorSector (fixed_t floordestheight) const
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{
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int i;
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sector_t *sec;
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//jff 5/23/98 don't disturb sec->linecount while searching
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// but allow early exit in old demos
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for (i = 0; i < linecount; i++)
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{
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sec = getNextSector (lines[i], this);
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if (sec != NULL &&
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(sec->floorplane.ZatPoint (lines[i]->v1) == floordestheight ||
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sec->floorplane.ZatPoint (lines[i]->v2) == floordestheight))
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{
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return sec;
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}
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}
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return NULL;
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}
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//
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// P_FindModelCeilingSector()
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//
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// Passed a ceiling height and a sector number, return a pointer to a
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// a sector with that ceiling height across the lowest numbered two sided
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// line surrounding the sector.
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//
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// Note: If no sector at that height bounds the sector passed, return NULL
|
|
//
|
|
// jff 02/03/98 Add routine to find numeric model ceiling
|
|
// around a sector specified by sector number
|
|
// used only from generalized ceiling types
|
|
// jff 3/14/98 change first parameter to plain height to allow call
|
|
// from routine not using ceiling_t
|
|
//
|
|
sector_t *sector_t::FindModelCeilingSector (fixed_t floordestheight) const
|
|
{
|
|
int i;
|
|
sector_t *sec;
|
|
|
|
//jff 5/23/98 don't disturb sec->linecount while searching
|
|
// but allow early exit in old demos
|
|
for (i = 0; i < linecount; i++)
|
|
{
|
|
sec = getNextSector (lines[i], this);
|
|
if (sec != NULL &&
|
|
(sec->ceilingplane.ZatPoint (lines[i]->v1) == floordestheight ||
|
|
sec->ceilingplane.ZatPoint (lines[i]->v2) == floordestheight))
|
|
{
|
|
return sec;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
//
|
|
// Find minimum light from an adjacent sector
|
|
//
|
|
int sector_t::FindMinSurroundingLight (int min) const
|
|
{
|
|
int i;
|
|
line_t* line;
|
|
sector_t* check;
|
|
|
|
for (i = 0; i < linecount; i++)
|
|
{
|
|
line = lines[i];
|
|
if (NULL != (check = getNextSector (line, this)) &&
|
|
check->lightlevel < min)
|
|
{
|
|
min = check->lightlevel;
|
|
}
|
|
}
|
|
return min;
|
|
}
|
|
|
|
//
|
|
// Find the highest point on the floor of the sector
|
|
//
|
|
fixed_t sector_t::FindHighestFloorPoint (vertex_t **v) const
|
|
{
|
|
int i;
|
|
line_t *line;
|
|
fixed_t height = FIXED_MIN;
|
|
fixed_t probeheight;
|
|
vertex_t *spot = NULL;
|
|
|
|
if ((floorplane.a | floorplane.b) == 0)
|
|
{
|
|
if (v != NULL)
|
|
{
|
|
if (linecount == 0) *v = &vertexes[0];
|
|
else *v = lines[0]->v1;
|
|
}
|
|
return -floorplane.d;
|
|
}
|
|
|
|
for (i = 0; i < linecount; i++)
|
|
{
|
|
line = lines[i];
|
|
probeheight = floorplane.ZatPoint (line->v1);
|
|
if (probeheight > height)
|
|
{
|
|
height = probeheight;
|
|
spot = line->v1;
|
|
}
|
|
probeheight = floorplane.ZatPoint (line->v2);
|
|
if (probeheight > height)
|
|
{
|
|
height = probeheight;
|
|
spot = line->v2;
|
|
}
|
|
}
|
|
if (v != NULL)
|
|
*v = spot;
|
|
return height;
|
|
}
|
|
|
|
//
|
|
// Find the lowest point on the ceiling of the sector
|
|
//
|
|
fixed_t sector_t::FindLowestCeilingPoint (vertex_t **v) const
|
|
{
|
|
int i;
|
|
line_t *line;
|
|
fixed_t height = FIXED_MAX;
|
|
fixed_t probeheight;
|
|
vertex_t *spot = NULL;
|
|
|
|
if ((ceilingplane.a | ceilingplane.b) == 0)
|
|
{
|
|
if (v != NULL)
|
|
{
|
|
if (linecount == 0) *v = &vertexes[0];
|
|
else *v = lines[0]->v1;
|
|
}
|
|
return ceilingplane.d;
|
|
}
|
|
|
|
for (i = 0; i < linecount; i++)
|
|
{
|
|
line = lines[i];
|
|
probeheight = ceilingplane.ZatPoint (line->v1);
|
|
if (probeheight < height)
|
|
{
|
|
height = probeheight;
|
|
spot = line->v1;
|
|
}
|
|
probeheight = ceilingplane.ZatPoint (line->v2);
|
|
if (probeheight < height)
|
|
{
|
|
height = probeheight;
|
|
spot = line->v2;
|
|
}
|
|
}
|
|
if (v != NULL)
|
|
*v = spot;
|
|
return height;
|
|
}
|
|
|
|
|
|
void sector_t::SetColor(int r, int g, int b, int desat)
|
|
{
|
|
PalEntry color = PalEntry (r,g,b);
|
|
ColorMap = GetSpecialLights (color, ColorMap->Fade, desat);
|
|
P_RecalculateAttachedLights(this);
|
|
}
|
|
|
|
void sector_t::SetFade(int r, int g, int b)
|
|
{
|
|
PalEntry fade = PalEntry (r,g,b);
|
|
ColorMap = GetSpecialLights (ColorMap->Color, fade, ColorMap->Desaturate);
|
|
P_RecalculateAttachedLights(this);
|
|
}
|
|
|
|
//===========================================================================
|
|
//
|
|
// sector_t :: ClosestPoint
|
|
//
|
|
// Given a point (x,y), returns the point (ox,oy) on the sector's defining
|
|
// lines that is nearest to (x,y).
|
|
//
|
|
//===========================================================================
|
|
|
|
void sector_t::ClosestPoint(fixed_t fx, fixed_t fy, fixed_t &ox, fixed_t &oy) const
|
|
{
|
|
int i;
|
|
double x = fx, y = fy;
|
|
double bestdist = HUGE_VAL;
|
|
double bestx = 0, besty = 0;
|
|
|
|
for (i = 0; i < linecount; ++i)
|
|
{
|
|
vertex_t *v1 = lines[i]->v1;
|
|
vertex_t *v2 = lines[i]->v2;
|
|
double a = v2->x - v1->x;
|
|
double b = v2->y - v1->y;
|
|
double den = a*a + b*b;
|
|
double ix, iy, dist;
|
|
|
|
if (den == 0)
|
|
{ // Line is actually a point!
|
|
ix = v1->x;
|
|
iy = v1->y;
|
|
}
|
|
else
|
|
{
|
|
double num = (x - v1->x) * a + (y - v1->y) * b;
|
|
double u = num / den;
|
|
if (u <= 0)
|
|
{
|
|
ix = v1->x;
|
|
iy = v1->y;
|
|
}
|
|
else if (u >= 1)
|
|
{
|
|
ix = v2->x;
|
|
iy = v2->y;
|
|
}
|
|
else
|
|
{
|
|
ix = v1->x + u * a;
|
|
iy = v1->y + u * b;
|
|
}
|
|
}
|
|
a = (ix - x);
|
|
b = (iy - y);
|
|
dist = a*a + b*b;
|
|
if (dist < bestdist)
|
|
{
|
|
bestdist = dist;
|
|
bestx = ix;
|
|
besty = iy;
|
|
}
|
|
}
|
|
ox = fixed_t(bestx);
|
|
oy = fixed_t(besty);
|
|
}
|
|
|
|
|
|
bool sector_t::PlaneMoving(int pos)
|
|
{
|
|
if (pos == floor)
|
|
return (floordata != NULL || (planes[floor].Flags & PLANEF_BLOCKED));
|
|
else
|
|
return (ceilingdata != NULL || (planes[ceiling].Flags & PLANEF_BLOCKED));
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
// P_AlignFlat
|
|
//
|
|
//==========================================================================
|
|
|
|
bool P_AlignFlat (int linenum, int side, int fc)
|
|
{
|
|
line_t *line = lines + linenum;
|
|
sector_t *sec = side ? line->backsector : line->frontsector;
|
|
|
|
if (!sec)
|
|
return false;
|
|
|
|
fixed_t x = line->v1->x;
|
|
fixed_t y = line->v1->y;
|
|
|
|
angle_t angle = R_PointToAngle2 (x, y, line->v2->x, line->v2->y);
|
|
angle_t norm = (angle-ANGLE_90) >> ANGLETOFINESHIFT;
|
|
|
|
fixed_t dist = -DMulScale16 (finecosine[norm], x, finesine[norm], y);
|
|
|
|
if (side)
|
|
{
|
|
angle = angle + ANGLE_180;
|
|
dist = -dist;
|
|
}
|
|
|
|
sec->SetBase(fc, dist & ((1<<(FRACBITS+8))-1), 0-angle);
|
|
return true;
|
|
}
|