ref: e1cc501e1a775490abdced0af6e470076847d037
dir: /src/hexen/po_man.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
// 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.
//
// HEADER FILES ------------------------------------------------------------
#include "h2def.h"
#include "i_system.h"
#include "m_bbox.h"
#include "i_swap.h"
#include "p_local.h"
#include "r_local.h"
// MACROS ------------------------------------------------------------------
#define PO_MAXPOLYSEGS 64
// TYPES -------------------------------------------------------------------
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
static polyobj_t *GetPolyobj(int polyNum);
static int GetPolyobjMirror(int poly);
static void ThrustMobj(mobj_t * mobj, seg_t * seg, polyobj_t * po);
static void UpdateSegBBox(seg_t * seg);
static void RotatePt(int an, fixed_t * x, fixed_t * y, fixed_t startSpotX,
fixed_t startSpotY);
static void UnLinkPolyobj(polyobj_t * po);
static void LinkPolyobj(polyobj_t * po);
static boolean CheckMobjBlocking(seg_t * seg, polyobj_t * po);
static void InitBlockMap(void);
static void IterFindPolySegs(int x, int y, seg_t ** segList);
static void SpawnPolyobj(int index, int tag, boolean crush);
static void TranslateToStartSpot(int tag, int originX, int originY);
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
// PUBLIC DATA DEFINITIONS -------------------------------------------------
polyblock_t **PolyBlockMap;
polyobj_t *polyobjs; // list of all poly-objects on the level
int po_NumPolyobjs;
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static int PolySegCount;
static fixed_t PolyStartX;
static fixed_t PolyStartY;
// CODE --------------------------------------------------------------------
// ===== Polyobj Event Code =====
//==========================================================================
//
// T_RotatePoly
//
//==========================================================================
void T_RotatePoly(polyevent_t * pe)
{
int absSpeed;
polyobj_t *poly;
if (PO_RotatePolyobj(pe->polyobj, pe->speed))
{
absSpeed = abs(pe->speed);
if (pe->dist == -1)
{ // perpetual polyobj
return;
}
pe->dist -= absSpeed;
if (pe->dist <= 0)
{
poly = GetPolyobj(pe->polyobj);
if (poly->specialdata == pe)
{
poly->specialdata = NULL;
}
SN_StopSequence((mobj_t *) & poly->startSpot);
P_PolyobjFinished(poly->tag);
P_RemoveThinker(&pe->thinker);
}
if (pe->dist < absSpeed)
{
pe->speed = pe->dist * (pe->speed < 0 ? -1 : 1);
}
}
}
//==========================================================================
//
// EV_RotatePoly
//
//==========================================================================
boolean EV_RotatePoly(line_t * line, byte * args, int direction, boolean
overRide)
{
int mirror;
int polyNum;
polyevent_t *pe;
polyobj_t *poly;
polyNum = args[0];
poly = GetPolyobj(polyNum);
if (poly != NULL)
{
if (poly->specialdata && !overRide)
{ // poly is already moving
return false;
}
}
else
{
I_Error("EV_RotatePoly: Invalid polyobj num: %d\n", polyNum);
}
pe = Z_Malloc(sizeof(polyevent_t), PU_LEVSPEC, 0);
P_AddThinker(&pe->thinker);
pe->thinker.function = T_RotatePoly;
pe->polyobj = polyNum;
if (args[2])
{
if (args[2] == 255)
{
pe->dist = -1;
}
else
{
pe->dist = args[2] * (ANG90 / 64); // Angle
}
}
else
{
pe->dist = ANG_MAX - 1;
}
pe->speed = (args[1] * direction * (ANG90 / 64)) >> 3;
poly->specialdata = pe;
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
while ((mirror = GetPolyobjMirror(polyNum)) != 0)
{
poly = GetPolyobj(mirror);
if (poly && poly->specialdata && !overRide)
{ // mirroring poly is already in motion
break;
}
pe = Z_Malloc(sizeof(polyevent_t), PU_LEVSPEC, 0);
P_AddThinker(&pe->thinker);
pe->thinker.function = T_RotatePoly;
poly->specialdata = pe;
pe->polyobj = mirror;
if (args[2])
{
if (args[2] == 255)
{
pe->dist = -1;
}
else
{
pe->dist = args[2] * (ANG90 / 64); // Angle
}
}
else
{
pe->dist = ANG_MAX - 1;
}
poly = GetPolyobj(polyNum);
if (poly != NULL)
{
poly->specialdata = pe;
}
else
{
I_Error("EV_RotatePoly: Invalid polyobj num: %d\n", polyNum);
}
direction = -direction;
pe->speed = (args[1] * direction * (ANG90 / 64)) >> 3;
polyNum = mirror;
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
return true;
}
//==========================================================================
//
// T_MovePoly
//
//==========================================================================
void T_MovePoly(polyevent_t * pe)
{
int absSpeed;
polyobj_t *poly;
if (PO_MovePolyobj(pe->polyobj, pe->xSpeed, pe->ySpeed))
{
absSpeed = abs(pe->speed);
pe->dist -= absSpeed;
if (pe->dist <= 0)
{
poly = GetPolyobj(pe->polyobj);
if (poly->specialdata == pe)
{
poly->specialdata = NULL;
}
SN_StopSequence((mobj_t *) & poly->startSpot);
P_PolyobjFinished(poly->tag);
P_RemoveThinker(&pe->thinker);
}
if (pe->dist < absSpeed)
{
pe->speed = pe->dist * (pe->speed < 0 ? -1 : 1);
pe->xSpeed = FixedMul(pe->speed, finecosine[pe->angle]);
pe->ySpeed = FixedMul(pe->speed, finesine[pe->angle]);
}
}
}
//==========================================================================
//
// EV_MovePoly
//
//==========================================================================
boolean EV_MovePoly(line_t * line, byte * args, boolean timesEight, boolean
overRide)
{
int mirror;
int polyNum;
polyevent_t *pe;
polyobj_t *poly;
angle_t an;
polyNum = args[0];
poly = GetPolyobj(polyNum);
if (poly != NULL)
{
if (poly->specialdata && !overRide)
{ // poly is already moving
return false;
}
}
else
{
I_Error("EV_MovePoly: Invalid polyobj num: %d\n", polyNum);
}
pe = Z_Malloc(sizeof(polyevent_t), PU_LEVSPEC, 0);
P_AddThinker(&pe->thinker);
pe->thinker.function = T_MovePoly;
pe->polyobj = polyNum;
if (timesEight)
{
pe->dist = args[3] * 8 * FRACUNIT;
}
else
{
pe->dist = args[3] * FRACUNIT; // Distance
}
pe->speed = args[1] * (FRACUNIT / 8);
poly->specialdata = pe;
an = args[2] * (ANG90 / 64);
pe->angle = an >> ANGLETOFINESHIFT;
pe->xSpeed = FixedMul(pe->speed, finecosine[pe->angle]);
pe->ySpeed = FixedMul(pe->speed, finesine[pe->angle]);
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
while ((mirror = GetPolyobjMirror(polyNum)) != 0)
{
poly = GetPolyobj(mirror);
if (poly && poly->specialdata && !overRide)
{ // mirroring poly is already in motion
break;
}
pe = Z_Malloc(sizeof(polyevent_t), PU_LEVSPEC, 0);
P_AddThinker(&pe->thinker);
pe->thinker.function = T_MovePoly;
pe->polyobj = mirror;
poly->specialdata = pe;
if (timesEight)
{
pe->dist = args[3] * 8 * FRACUNIT;
}
else
{
pe->dist = args[3] * FRACUNIT; // Distance
}
pe->speed = args[1] * (FRACUNIT / 8);
an = an + ANG180; // reverse the angle
pe->angle = an >> ANGLETOFINESHIFT;
pe->xSpeed = FixedMul(pe->speed, finecosine[pe->angle]);
pe->ySpeed = FixedMul(pe->speed, finesine[pe->angle]);
polyNum = mirror;
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
return true;
}
//==========================================================================
//
// T_PolyDoor
//
//==========================================================================
void T_PolyDoor(polydoor_t * pd)
{
int absSpeed;
polyobj_t *poly;
if (pd->tics)
{
if (!--pd->tics)
{
poly = GetPolyobj(pd->polyobj);
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
return;
}
switch (pd->type)
{
case PODOOR_SLIDE:
if (PO_MovePolyobj(pd->polyobj, pd->xSpeed, pd->ySpeed))
{
absSpeed = abs(pd->speed);
pd->dist -= absSpeed;
if (pd->dist <= 0)
{
poly = GetPolyobj(pd->polyobj);
SN_StopSequence((mobj_t *) & poly->startSpot);
if (!pd->close)
{
pd->dist = pd->totalDist;
pd->close = true;
pd->tics = pd->waitTics;
pd->direction = (ANG_MAX >> ANGLETOFINESHIFT) -
pd->direction;
pd->xSpeed = -pd->xSpeed;
pd->ySpeed = -pd->ySpeed;
}
else
{
if (poly->specialdata == pd)
{
poly->specialdata = NULL;
}
P_PolyobjFinished(poly->tag);
P_RemoveThinker(&pd->thinker);
}
}
}
else
{
poly = GetPolyobj(pd->polyobj);
if (poly->crush || !pd->close)
{ // continue moving if the poly is a crusher, or is opening
return;
}
else
{ // open back up
pd->dist = pd->totalDist - pd->dist;
pd->direction = (ANG_MAX >> ANGLETOFINESHIFT) -
pd->direction;
pd->xSpeed = -pd->xSpeed;
pd->ySpeed = -pd->ySpeed;
pd->close = false;
SN_StartSequence((mobj_t *) & poly->startSpot,
SEQ_DOOR_STONE + poly->seqType);
}
}
break;
case PODOOR_SWING:
if (PO_RotatePolyobj(pd->polyobj, pd->speed))
{
absSpeed = abs(pd->speed);
if (pd->dist == -1)
{ // perpetual polyobj
return;
}
pd->dist -= absSpeed;
if (pd->dist <= 0)
{
poly = GetPolyobj(pd->polyobj);
SN_StopSequence((mobj_t *) & poly->startSpot);
if (!pd->close)
{
pd->dist = pd->totalDist;
pd->close = true;
pd->tics = pd->waitTics;
pd->speed = -pd->speed;
}
else
{
if (poly->specialdata == pd)
{
poly->specialdata = NULL;
}
P_PolyobjFinished(poly->tag);
P_RemoveThinker(&pd->thinker);
}
}
}
else
{
poly = GetPolyobj(pd->polyobj);
if (poly->crush || !pd->close)
{ // continue moving if the poly is a crusher, or is opening
return;
}
else
{ // open back up and rewait
pd->dist = pd->totalDist - pd->dist;
pd->speed = -pd->speed;
pd->close = false;
SN_StartSequence((mobj_t *) & poly->startSpot,
SEQ_DOOR_STONE + poly->seqType);
}
}
break;
default:
break;
}
}
//==========================================================================
//
// EV_OpenPolyDoor
//
//==========================================================================
boolean EV_OpenPolyDoor(line_t * line, byte * args, podoortype_t type)
{
int mirror;
int polyNum;
polydoor_t *pd;
polyobj_t *poly;
angle_t an = 0;
polyNum = args[0];
poly = GetPolyobj(polyNum);
if (poly != NULL)
{
if (poly->specialdata)
{ // poly is already moving
return false;
}
}
else
{
I_Error("EV_OpenPolyDoor: Invalid polyobj num: %d\n", polyNum);
}
pd = Z_Malloc(sizeof(polydoor_t), PU_LEVSPEC, 0);
memset(pd, 0, sizeof(polydoor_t));
P_AddThinker(&pd->thinker);
pd->thinker.function = T_PolyDoor;
pd->type = type;
pd->polyobj = polyNum;
if (type == PODOOR_SLIDE)
{
pd->waitTics = args[4];
pd->speed = args[1] * (FRACUNIT / 8);
pd->totalDist = args[3] * FRACUNIT; // Distance
pd->dist = pd->totalDist;
an = args[2] * (ANG90 / 64);
pd->direction = an >> ANGLETOFINESHIFT;
pd->xSpeed = FixedMul(pd->speed, finecosine[pd->direction]);
pd->ySpeed = FixedMul(pd->speed, finesine[pd->direction]);
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
else if (type == PODOOR_SWING)
{
pd->waitTics = args[3];
pd->direction = 1; // ADD: PODOOR_SWINGL, PODOOR_SWINGR
pd->speed = (args[1] * pd->direction * (ANG90 / 64)) >> 3;
pd->totalDist = args[2] * (ANG90 / 64);
pd->dist = pd->totalDist;
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
poly->specialdata = pd;
while ((mirror = GetPolyobjMirror(polyNum)) != 0)
{
poly = GetPolyobj(mirror);
if (poly && poly->specialdata)
{ // mirroring poly is already in motion
break;
}
pd = Z_Malloc(sizeof(polydoor_t), PU_LEVSPEC, 0);
memset(pd, 0, sizeof(polydoor_t));
P_AddThinker(&pd->thinker);
pd->thinker.function = T_PolyDoor;
pd->polyobj = mirror;
pd->type = type;
poly->specialdata = pd;
if (type == PODOOR_SLIDE)
{
pd->waitTics = args[4];
pd->speed = args[1] * (FRACUNIT / 8);
pd->totalDist = args[3] * FRACUNIT; // Distance
pd->dist = pd->totalDist;
an = an + ANG180; // reverse the angle
pd->direction = an >> ANGLETOFINESHIFT;
pd->xSpeed = FixedMul(pd->speed, finecosine[pd->direction]);
pd->ySpeed = FixedMul(pd->speed, finesine[pd->direction]);
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
else if (type == PODOOR_SWING)
{
pd->waitTics = args[3];
pd->direction = -1; // ADD: same as above
pd->speed = (args[1] * pd->direction * (ANG90 / 64)) >> 3;
pd->totalDist = args[2] * (ANG90 / 64);
pd->dist = pd->totalDist;
SN_StartSequence((mobj_t *) & poly->startSpot, SEQ_DOOR_STONE +
poly->seqType);
}
polyNum = mirror;
}
return true;
}
// ===== Higher Level Poly Interface code =====
//==========================================================================
//
// GetPolyobj
//
//==========================================================================
static polyobj_t *GetPolyobj(int polyNum)
{
int i;
for (i = 0; i < po_NumPolyobjs; i++)
{
if (polyobjs[i].tag == polyNum)
{
return &polyobjs[i];
}
}
return NULL;
}
//==========================================================================
//
// GetPolyobjMirror
//
//==========================================================================
static int GetPolyobjMirror(int poly)
{
int i;
for (i = 0; i < po_NumPolyobjs; i++)
{
if (polyobjs[i].tag == poly)
{
return ((*polyobjs[i].segs)->linedef->arg2);
}
}
return 0;
}
//==========================================================================
//
// ThrustMobj
//
//==========================================================================
static void ThrustMobj(mobj_t * mobj, seg_t * seg, polyobj_t * po)
{
int thrustAngle;
int thrustX;
int thrustY;
polyevent_t *pe;
int force;
if (!(mobj->flags & MF_SHOOTABLE) && !mobj->player)
{
return;
}
thrustAngle = (seg->angle - ANG90) >> ANGLETOFINESHIFT;
pe = po->specialdata;
if (pe)
{
if (pe->thinker.function == T_RotatePoly)
{
force = pe->speed >> 8;
}
else
{
force = pe->speed >> 3;
}
if (force < FRACUNIT)
{
force = FRACUNIT;
}
else if (force > 4 * FRACUNIT)
{
force = 4 * FRACUNIT;
}
}
else
{
force = FRACUNIT;
}
thrustX = FixedMul(force, finecosine[thrustAngle]);
thrustY = FixedMul(force, finesine[thrustAngle]);
mobj->momx += thrustX;
mobj->momy += thrustY;
if (po->crush)
{
if (!P_CheckPosition(mobj, mobj->x + thrustX, mobj->y + thrustY))
{
P_DamageMobj(mobj, NULL, NULL, 3);
}
}
}
//==========================================================================
//
// UpdateSegBBox
//
//==========================================================================
static void UpdateSegBBox(seg_t * seg)
{
line_t *line;
line = seg->linedef;
if (seg->v1->x < seg->v2->x)
{
line->bbox[BOXLEFT] = seg->v1->x;
line->bbox[BOXRIGHT] = seg->v2->x;
}
else
{
line->bbox[BOXLEFT] = seg->v2->x;
line->bbox[BOXRIGHT] = seg->v1->x;
}
if (seg->v1->y < seg->v2->y)
{
line->bbox[BOXBOTTOM] = seg->v1->y;
line->bbox[BOXTOP] = seg->v2->y;
}
else
{
line->bbox[BOXBOTTOM] = seg->v2->y;
line->bbox[BOXTOP] = seg->v1->y;
}
// Update the line's slopetype
line->dx = line->v2->x - line->v1->x;
line->dy = line->v2->y - line->v1->y;
if (!line->dx)
{
line->slopetype = ST_VERTICAL;
}
else if (!line->dy)
{
line->slopetype = ST_HORIZONTAL;
}
else
{
if (FixedDiv(line->dy, line->dx) > 0)
{
line->slopetype = ST_POSITIVE;
}
else
{
line->slopetype = ST_NEGATIVE;
}
}
}
//==========================================================================
//
// PO_MovePolyobj
//
//==========================================================================
boolean PO_MovePolyobj(int num, int x, int y)
{
int count;
seg_t **segList;
seg_t **veryTempSeg;
polyobj_t *po;
vertex_t *prevPts;
boolean blocked;
if (!(po = GetPolyobj(num)))
{
I_Error("PO_MovePolyobj: Invalid polyobj number: %d\n", num);
}
UnLinkPolyobj(po);
segList = po->segs;
prevPts = po->prevPts;
blocked = false;
validcount++;
for (count = po->numsegs; count; count--, segList++, prevPts++)
{
if ((*segList)->linedef->validcount != validcount)
{
(*segList)->linedef->bbox[BOXTOP] += y;
(*segList)->linedef->bbox[BOXBOTTOM] += y;
(*segList)->linedef->bbox[BOXLEFT] += x;
(*segList)->linedef->bbox[BOXRIGHT] += x;
(*segList)->linedef->validcount = validcount;
}
for (veryTempSeg = po->segs; veryTempSeg != segList; veryTempSeg++)
{
if ((*veryTempSeg)->v1 == (*segList)->v1)
{
break;
}
}
if (veryTempSeg == segList)
{
(*segList)->v1->x += x;
(*segList)->v1->y += y;
}
(*prevPts).x += x; // previous points are unique for each seg
(*prevPts).y += y;
}
segList = po->segs;
for (count = po->numsegs; count; count--, segList++)
{
if (CheckMobjBlocking(*segList, po))
{
blocked = true;
}
}
if (blocked)
{
count = po->numsegs;
segList = po->segs;
prevPts = po->prevPts;
validcount++;
while (count--)
{
if ((*segList)->linedef->validcount != validcount)
{
(*segList)->linedef->bbox[BOXTOP] -= y;
(*segList)->linedef->bbox[BOXBOTTOM] -= y;
(*segList)->linedef->bbox[BOXLEFT] -= x;
(*segList)->linedef->bbox[BOXRIGHT] -= x;
(*segList)->linedef->validcount = validcount;
}
for (veryTempSeg = po->segs; veryTempSeg != segList;
veryTempSeg++)
{
if ((*veryTempSeg)->v1 == (*segList)->v1)
{
break;
}
}
if (veryTempSeg == segList)
{
(*segList)->v1->x -= x;
(*segList)->v1->y -= y;
}
(*prevPts).x -= x;
(*prevPts).y -= y;
segList++;
prevPts++;
}
LinkPolyobj(po);
return false;
}
po->startSpot.x += x;
po->startSpot.y += y;
LinkPolyobj(po);
return true;
}
//==========================================================================
//
// RotatePt
//
//==========================================================================
static void RotatePt(int an, fixed_t * x, fixed_t * y, fixed_t startSpotX,
fixed_t startSpotY)
{
fixed_t trx, try;
fixed_t gxt, gyt;
trx = *x;
try = *y;
gxt = FixedMul(trx, finecosine[an]);
gyt = FixedMul(try, finesine[an]);
*x = (gxt - gyt) + startSpotX;
gxt = FixedMul(trx, finesine[an]);
gyt = FixedMul(try, finecosine[an]);
*y = (gyt + gxt) + startSpotY;
}
//==========================================================================
//
// PO_RotatePolyobj
//
//==========================================================================
boolean PO_RotatePolyobj(int num, angle_t angle)
{
int count;
seg_t **segList;
vertex_t *originalPts;
vertex_t *prevPts;
int an;
polyobj_t *po;
boolean blocked;
if (!(po = GetPolyobj(num)))
{
I_Error("PO_RotatePolyobj: Invalid polyobj number: %d\n", num);
}
an = (po->angle + angle) >> ANGLETOFINESHIFT;
UnLinkPolyobj(po);
segList = po->segs;
originalPts = po->originalPts;
prevPts = po->prevPts;
for (count = po->numsegs; count; count--, segList++, originalPts++,
prevPts++)
{
prevPts->x = (*segList)->v1->x;
prevPts->y = (*segList)->v1->y;
(*segList)->v1->x = originalPts->x;
(*segList)->v1->y = originalPts->y;
RotatePt(an, &(*segList)->v1->x, &(*segList)->v1->y, po->startSpot.x,
po->startSpot.y);
}
segList = po->segs;
blocked = false;
validcount++;
for (count = po->numsegs; count; count--, segList++)
{
if (CheckMobjBlocking(*segList, po))
{
blocked = true;
}
if ((*segList)->linedef->validcount != validcount)
{
UpdateSegBBox(*segList);
(*segList)->linedef->validcount = validcount;
}
(*segList)->angle += angle;
}
if (blocked)
{
segList = po->segs;
prevPts = po->prevPts;
for (count = po->numsegs; count; count--, segList++, prevPts++)
{
(*segList)->v1->x = prevPts->x;
(*segList)->v1->y = prevPts->y;
}
segList = po->segs;
validcount++;
for (count = po->numsegs; count; count--, segList++, prevPts++)
{
if ((*segList)->linedef->validcount != validcount)
{
UpdateSegBBox(*segList);
(*segList)->linedef->validcount = validcount;
}
(*segList)->angle -= angle;
}
LinkPolyobj(po);
return false;
}
po->angle += angle;
LinkPolyobj(po);
return true;
}
//==========================================================================
//
// UnLinkPolyobj
//
//==========================================================================
static void UnLinkPolyobj(polyobj_t * po)
{
polyblock_t *link;
int i, j;
int index;
// remove the polyobj from each blockmap section
for (j = po->bbox[BOXBOTTOM]; j <= po->bbox[BOXTOP]; j++)
{
index = j * bmapwidth;
for (i = po->bbox[BOXLEFT]; i <= po->bbox[BOXRIGHT]; i++)
{
if (i >= 0 && i < bmapwidth && j >= 0 && j < bmapheight)
{
link = PolyBlockMap[index + i];
while (link != NULL && link->polyobj != po)
{
link = link->next;
}
if (link == NULL)
{ // polyobj not located in the link cell
continue;
}
link->polyobj = NULL;
}
}
}
}
//==========================================================================
//
// LinkPolyobj
//
//==========================================================================
static void LinkPolyobj(polyobj_t * po)
{
int leftX, rightX;
int topY, bottomY;
seg_t **tempSeg;
polyblock_t **link;
polyblock_t *tempLink;
int i, j;
// calculate the polyobj bbox
tempSeg = po->segs;
rightX = leftX = (*tempSeg)->v1->x;
topY = bottomY = (*tempSeg)->v1->y;
for (i = 0; i < po->numsegs; i++, tempSeg++)
{
if ((*tempSeg)->v1->x > rightX)
{
rightX = (*tempSeg)->v1->x;
}
if ((*tempSeg)->v1->x < leftX)
{
leftX = (*tempSeg)->v1->x;
}
if ((*tempSeg)->v1->y > topY)
{
topY = (*tempSeg)->v1->y;
}
if ((*tempSeg)->v1->y < bottomY)
{
bottomY = (*tempSeg)->v1->y;
}
}
po->bbox[BOXRIGHT] = (rightX - bmaporgx) >> MAPBLOCKSHIFT;
po->bbox[BOXLEFT] = (leftX - bmaporgx) >> MAPBLOCKSHIFT;
po->bbox[BOXTOP] = (topY - bmaporgy) >> MAPBLOCKSHIFT;
po->bbox[BOXBOTTOM] = (bottomY - bmaporgy) >> MAPBLOCKSHIFT;
// add the polyobj to each blockmap section
for (j = po->bbox[BOXBOTTOM] * bmapwidth;
j <= po->bbox[BOXTOP] * bmapwidth; j += bmapwidth)
{
for (i = po->bbox[BOXLEFT]; i <= po->bbox[BOXRIGHT]; i++)
{
if (i >= 0 && i < bmapwidth && j >= 0
&& j < bmapheight * bmapwidth)
{
link = &PolyBlockMap[j + i];
if (!(*link))
{ // Create a new link at the current block cell
*link = Z_Malloc(sizeof(polyblock_t), PU_LEVEL, 0);
(*link)->next = NULL;
(*link)->prev = NULL;
(*link)->polyobj = po;
continue;
}
else
{
tempLink = *link;
while (tempLink->next != NULL
&& tempLink->polyobj != NULL)
{
tempLink = tempLink->next;
}
}
if (tempLink->polyobj == NULL)
{
tempLink->polyobj = po;
continue;
}
else
{
tempLink->next = Z_Malloc(sizeof(polyblock_t),
PU_LEVEL, 0);
tempLink->next->next = NULL;
tempLink->next->prev = tempLink;
tempLink->next->polyobj = po;
}
}
// else, don't link the polyobj, since it's off the map
}
}
}
//==========================================================================
//
// CheckMobjBlocking
//
//==========================================================================
static boolean CheckMobjBlocking(seg_t * seg, polyobj_t * po)
{
mobj_t *mobj;
int i, j;
int left, right, top, bottom;
int tmbbox[4];
line_t *ld;
boolean blocked;
ld = seg->linedef;
top = (ld->bbox[BOXTOP] - bmaporgy + MAXRADIUS) >> MAPBLOCKSHIFT;
bottom = (ld->bbox[BOXBOTTOM] - bmaporgy - MAXRADIUS) >> MAPBLOCKSHIFT;
left = (ld->bbox[BOXLEFT] - bmaporgx - MAXRADIUS) >> MAPBLOCKSHIFT;
right = (ld->bbox[BOXRIGHT] - bmaporgx + MAXRADIUS) >> MAPBLOCKSHIFT;
blocked = false;
bottom = bottom < 0 ? 0 : bottom;
bottom = bottom >= bmapheight ? bmapheight - 1 : bottom;
top = top < 0 ? 0 : top;
top = top >= bmapheight ? bmapheight - 1 : top;
left = left < 0 ? 0 : left;
left = left >= bmapwidth ? bmapwidth - 1 : left;
right = right < 0 ? 0 : right;
right = right >= bmapwidth ? bmapwidth - 1 : right;
for (j = bottom * bmapwidth; j <= top * bmapwidth; j += bmapwidth)
{
for (i = left; i <= right; i++)
{
for (mobj = blocklinks[j + i]; mobj; mobj = mobj->bnext)
{
if (mobj->flags & MF_SOLID || mobj->player)
{
tmbbox[BOXTOP] = mobj->y + mobj->radius;
tmbbox[BOXBOTTOM] = mobj->y - mobj->radius;
tmbbox[BOXLEFT] = mobj->x - mobj->radius;
tmbbox[BOXRIGHT] = mobj->x + mobj->radius;
if (tmbbox[BOXRIGHT] <= ld->bbox[BOXLEFT]
|| tmbbox[BOXLEFT] >= ld->bbox[BOXRIGHT]
|| tmbbox[BOXTOP] <= ld->bbox[BOXBOTTOM]
|| tmbbox[BOXBOTTOM] >= ld->bbox[BOXTOP])
{
continue;
}
if (P_BoxOnLineSide(tmbbox, ld) != -1)
{
continue;
}
ThrustMobj(mobj, seg, po);
blocked = true;
}
}
}
}
return blocked;
}
//==========================================================================
//
// InitBlockMap
//
//==========================================================================
static void InitBlockMap(void)
{
int i;
int j;
seg_t **segList;
int leftX, rightX;
int topY, bottomY;
PolyBlockMap = Z_Malloc(bmapwidth * bmapheight * sizeof(polyblock_t *),
PU_LEVEL, 0);
memset(PolyBlockMap, 0, bmapwidth * bmapheight * sizeof(polyblock_t *));
for (i = 0; i < po_NumPolyobjs; i++)
{
LinkPolyobj(&polyobjs[i]);
// calculate a rough area
// right now, working like shit...gotta fix this...
segList = polyobjs[i].segs;
leftX = rightX = (*segList)->v1->x;
topY = bottomY = (*segList)->v1->y;
for (j = 0; j < polyobjs[i].numsegs; j++, segList++)
{
if ((*segList)->v1->x < leftX)
{
leftX = (*segList)->v1->x;
}
if ((*segList)->v1->x > rightX)
{
rightX = (*segList)->v1->x;
}
if ((*segList)->v1->y < bottomY)
{
bottomY = (*segList)->v1->y;
}
if ((*segList)->v1->y > topY)
{
topY = (*segList)->v1->y;
}
}
// area = ((rightX >> FRACBITS) - (leftX >> FRACBITS)) *
// ((topY >> FRACBITS) - (bottomY >> FRACBITS));
// fprintf(stdaux, "Area of Polyobj[%d]: %d\n", polyobjs[i].tag, area);
// fprintf(stdaux, "\t[%d]\n[%d]\t\t[%d]\n\t[%d]\n", topY>>FRACBITS,
// leftX>>FRACBITS,
// rightX>>FRACBITS, bottomY>>FRACBITS);
}
}
//==========================================================================
//
// IterFindPolySegs
//
// Passing NULL for segList will cause IterFindPolySegs to
// count the number of segs in the polyobj
//==========================================================================
static void IterFindPolySegs(int x, int y, seg_t ** segList)
{
int i;
if (x == PolyStartX && y == PolyStartY)
{
return;
}
for (i = 0; i < numsegs; i++)
{
if (segs[i].v1->x == x && segs[i].v1->y == y)
{
if (!segList)
{
PolySegCount++;
}
else
{
*segList++ = &segs[i];
}
IterFindPolySegs(segs[i].v2->x, segs[i].v2->y, segList);
return;
}
}
I_Error("IterFindPolySegs: Non-closed Polyobj located.\n");
}
//==========================================================================
//
// SpawnPolyobj
//
//==========================================================================
static void SpawnPolyobj(int index, int tag, boolean crush)
{
int i;
int j;
int psIndex;
int psIndexOld;
seg_t *polySegList[PO_MAXPOLYSEGS];
for (i = 0; i < numsegs; i++)
{
if (segs[i].linedef->special == PO_LINE_START &&
segs[i].linedef->arg1 == tag)
{
if (polyobjs[index].segs)
{
I_Error("SpawnPolyobj: Polyobj %d already spawned.\n", tag);
}
segs[i].linedef->special = 0;
segs[i].linedef->arg1 = 0;
PolySegCount = 1;
PolyStartX = segs[i].v1->x;
PolyStartY = segs[i].v1->y;
IterFindPolySegs(segs[i].v2->x, segs[i].v2->y, NULL);
polyobjs[index].numsegs = PolySegCount;
polyobjs[index].segs = Z_Malloc(PolySegCount * sizeof(seg_t *),
PU_LEVEL, 0);
*(polyobjs[index].segs) = &segs[i]; // insert the first seg
IterFindPolySegs(segs[i].v2->x, segs[i].v2->y,
polyobjs[index].segs + 1);
polyobjs[index].crush = crush;
polyobjs[index].tag = tag;
polyobjs[index].seqType = segs[i].linedef->arg3;
if (polyobjs[index].seqType < 0
|| polyobjs[index].seqType >= SEQTYPE_NUMSEQ)
{
polyobjs[index].seqType = 0;
}
break;
}
}
if (!polyobjs[index].segs)
{ // didn't find a polyobj through PO_LINE_START
psIndex = 0;
polyobjs[index].numsegs = 0;
for (j = 1; j < PO_MAXPOLYSEGS; j++)
{
psIndexOld = psIndex;
for (i = 0; i < numsegs; i++)
{
if (segs[i].linedef->special == PO_LINE_EXPLICIT &&
segs[i].linedef->arg1 == tag)
{
if (!segs[i].linedef->arg2)
{
I_Error
("SpawnPolyobj: Explicit line missing order number (probably %d) in poly %d.\n",
j + 1, tag);
}
if (segs[i].linedef->arg2 == j)
{
polySegList[psIndex] = &segs[i];
polyobjs[index].numsegs++;
psIndex++;
if (psIndex > PO_MAXPOLYSEGS)
{
I_Error
("SpawnPolyobj: psIndex > PO_MAXPOLYSEGS\n");
}
}
}
}
// Clear out any specials for these segs...we cannot clear them out
// in the above loop, since we aren't guaranteed one seg per
// linedef.
for (i = 0; i < numsegs; i++)
{
if (segs[i].linedef->special == PO_LINE_EXPLICIT &&
segs[i].linedef->arg1 == tag
&& segs[i].linedef->arg2 == j)
{
segs[i].linedef->special = 0;
segs[i].linedef->arg1 = 0;
}
}
if (psIndex == psIndexOld)
{ // Check if an explicit line order has been skipped
// A line has been skipped if there are any more explicit
// lines with the current tag value
for (i = 0; i < numsegs; i++)
{
if (segs[i].linedef->special == PO_LINE_EXPLICIT &&
segs[i].linedef->arg1 == tag)
{
I_Error
("SpawnPolyobj: Missing explicit line %d for poly %d\n",
j, tag);
}
}
}
}
if (polyobjs[index].numsegs)
{
PolySegCount = polyobjs[index].numsegs; // PolySegCount used globally
polyobjs[index].crush = crush;
polyobjs[index].tag = tag;
polyobjs[index].segs = Z_Malloc(polyobjs[index].numsegs
* sizeof(seg_t *), PU_LEVEL, 0);
for (i = 0; i < polyobjs[index].numsegs; i++)
{
polyobjs[index].segs[i] = polySegList[i];
}
polyobjs[index].seqType = (*polyobjs[index].segs)->linedef->arg4;
}
// Next, change the polyobjs first line to point to a mirror
// if it exists
(*polyobjs[index].segs)->linedef->arg2 =
(*polyobjs[index].segs)->linedef->arg3;
}
}
//==========================================================================
//
// TranslateToStartSpot
//
//==========================================================================
static void TranslateToStartSpot(int tag, int originX, int originY)
{
seg_t **tempSeg;
seg_t **veryTempSeg;
vertex_t *tempPt;
subsector_t *sub;
polyobj_t *po;
int deltaX;
int deltaY;
vertex_t avg; // used to find a polyobj's center, and hence subsector
int i;
po = NULL;
for (i = 0; i < po_NumPolyobjs; i++)
{
if (polyobjs[i].tag == tag)
{
po = &polyobjs[i];
break;
}
}
if (!po)
{ // didn't match the tag with a polyobj tag
I_Error("TranslateToStartSpot: Unable to match polyobj tag: %d\n",
tag);
}
if (po->segs == NULL)
{
I_Error
("TranslateToStartSpot: Anchor point located without a StartSpot point: %d\n",
tag);
}
po->originalPts = Z_Malloc(po->numsegs * sizeof(vertex_t), PU_LEVEL, 0);
po->prevPts = Z_Malloc(po->numsegs * sizeof(vertex_t), PU_LEVEL, 0);
deltaX = originX - po->startSpot.x;
deltaY = originY - po->startSpot.y;
tempSeg = po->segs;
tempPt = po->originalPts;
avg.x = 0;
avg.y = 0;
validcount++;
for (i = 0; i < po->numsegs; i++, tempSeg++, tempPt++)
{
if ((*tempSeg)->linedef->validcount != validcount)
{
(*tempSeg)->linedef->bbox[BOXTOP] -= deltaY;
(*tempSeg)->linedef->bbox[BOXBOTTOM] -= deltaY;
(*tempSeg)->linedef->bbox[BOXLEFT] -= deltaX;
(*tempSeg)->linedef->bbox[BOXRIGHT] -= deltaX;
(*tempSeg)->linedef->validcount = validcount;
}
for (veryTempSeg = po->segs; veryTempSeg != tempSeg; veryTempSeg++)
{
if ((*veryTempSeg)->v1 == (*tempSeg)->v1)
{
break;
}
}
if (veryTempSeg == tempSeg)
{ // the point hasn't been translated, yet
(*tempSeg)->v1->x -= deltaX;
(*tempSeg)->v1->y -= deltaY;
}
avg.x += (*tempSeg)->v1->x >> FRACBITS;
avg.y += (*tempSeg)->v1->y >> FRACBITS;
// the original Pts are based off the startSpot Pt, and are
// unique to each seg, not each linedef
tempPt->x = (*tempSeg)->v1->x - po->startSpot.x;
tempPt->y = (*tempSeg)->v1->y - po->startSpot.y;
}
avg.x /= po->numsegs;
avg.y /= po->numsegs;
sub = R_PointInSubsector(avg.x << FRACBITS, avg.y << FRACBITS);
if (sub->poly != NULL)
{
I_Error
("PO_TranslateToStartSpot: Multiple polyobjs in a single subsector.\n");
}
sub->poly = po;
}
//==========================================================================
//
// PO_Init
//
//==========================================================================
void PO_Init(int lump)
{
byte *data;
int i;
mapthing_t spawnthing;
mapthing_t *mt;
int numthings;
int polyIndex;
polyobjs = Z_Malloc(po_NumPolyobjs * sizeof(polyobj_t), PU_LEVEL, 0);
memset(polyobjs, 0, po_NumPolyobjs * sizeof(polyobj_t));
data = W_CacheLumpNum(lump, PU_STATIC);
numthings = W_LumpLength(lump) / sizeof(mapthing_t);
mt = (mapthing_t *) data;
polyIndex = 0; // index polyobj number
// Find the startSpot points, and spawn each polyobj
for (i = 0; i < numthings; i++, mt++)
{
spawnthing.x = SHORT(mt->x);
spawnthing.y = SHORT(mt->y);
spawnthing.angle = SHORT(mt->angle);
spawnthing.type = SHORT(mt->type);
// 3001 = no crush, 3002 = crushing
if (spawnthing.type == PO_SPAWN_TYPE
|| spawnthing.type == PO_SPAWNCRUSH_TYPE)
{ // Polyobj StartSpot Pt.
polyobjs[polyIndex].startSpot.x = spawnthing.x << FRACBITS;
polyobjs[polyIndex].startSpot.y = spawnthing.y << FRACBITS;
SpawnPolyobj(polyIndex, spawnthing.angle,
(spawnthing.type == PO_SPAWNCRUSH_TYPE));
polyIndex++;
}
}
mt = (mapthing_t *) data;
for (i = 0; i < numthings; i++, mt++)
{
spawnthing.x = SHORT(mt->x);
spawnthing.y = SHORT(mt->y);
spawnthing.angle = SHORT(mt->angle);
spawnthing.type = SHORT(mt->type);
if (spawnthing.type == PO_ANCHOR_TYPE)
{ // Polyobj Anchor Pt.
TranslateToStartSpot(spawnthing.angle,
spawnthing.x << FRACBITS,
spawnthing.y << FRACBITS);
}
}
W_ReleaseLumpNum(lump);
// check for a startspot without an anchor point
for (i = 0; i < po_NumPolyobjs; i++)
{
if (!polyobjs[i].originalPts)
{
I_Error
("PO_Init: StartSpot located without an Anchor point: %d\n",
polyobjs[i].tag);
}
}
InitBlockMap();
}
//==========================================================================
//
// PO_Busy
//
//==========================================================================
boolean PO_Busy(int polyobj)
{
polyobj_t *poly;
poly = GetPolyobj(polyobj);
if (!poly->specialdata)
{
return false;
}
else
{
return true;
}
}