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The Complete Doom Accessory Pack 3
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TheCompleteDoomAccessoryPackVolumeIiiCd.bin
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idwbsp
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savecnct.c
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1994-08-05
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13KB
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651 lines
/* saveconnect.m */
#ifdef _STEVE_FIX_
#include <malloc.h>
#endif
#include "idbsp.h"
typedef struct
{
int x,y;
} bpoint_t;
typedef struct
{
int xl, xh, yl, yh;
} bbox_t;
typedef struct
{
bpoint_t p1, p2;
} bline_t;
typedef struct
{
int numpoints;
bbox_t bounds;
bpoint_t *points;
} bchain_t;
typedef struct
{
int x,y;
int dx,dy;
} bdivline_t;
/* [numsec][numsec] array */
byte *connections;
int numblines;
bline_t *blines;
int numsectors;
bbox_t *secboxes;
int numbchains;
bchain_t *bchains;
void ClearBBox (bbox_t *box)
{
box->xl = box->yl = INT_MAX;
box->xh = box->yh = INT_MIN;
}
void AddToBBox (bbox_t *box, int x, int y)
{
if (x < box->xl)
box->xl = x;
if (x > box->xh)
box->xh = x;
if (y < box->yl)
box->yl = y;
if (y > box->yh)
box->yh = y;
}
/*
==================
=
= BPointOnSide
=
= Returns side 0 (front), 1 (back), or -1 (colinear)
==================
*/
int BPointOnSide (bpoint_t *pt, bdivline_t *l)
{
int dx,dy;
int left, right;
if (!l->dx)
{
if (pt->x < l->x)
return l->dy > 0;
return l->dy < 0;
}
if (!l->dy)
{
if (pt->y < l->y)
return l->dx < 0;
return l->dx > 0;
}
dx = pt->x - l->x;
dy = pt->y - l->y;
left = l->dy * dx;
right = dy * l->dx;
if (right < left)
return 0; /* front side */
return 1; /* back side */
}
void DrawBBox (bbox_t *box)
{
/*
PSmoveto (box->xl,box->yl);
PSlineto (box->xh,box->yl);
PSlineto (box->xh,box->yh);
PSlineto (box->xl,box->yh);
PSlineto (box->xl,box->yl);
PSstroke ();
NXPing ();
*/
}
void DrawDivline (bdivline_t *li)
{
/*
PSmoveto (li->x,li->y);
PSrlineto (li->dx,li->dy);
PSstroke ();
NXPing ();
*/
}
void DrawBChain (bchain_t *ch)
{
/*
int i;
PSmoveto (ch->points->x,ch->points->y);
for (i=1 ; i<ch->numpoints ; i++)
PSlineto (ch->points[i].x,ch->points[i].y);
PSstroke ();
NXPing ();
*/
}
bdivline_t ends[2], sides[2];
int end0out, end1out, side0out, side1out;
bbox_t sweptarea;
/*
====================
=
= DoesChainBlock
=
====================
*/
boolean DoesChainBlock (bchain_t *chain)
{
/*
if a solid line can be walked from one side to the other without going out
an end, the path is blocked
*/
bpoint_t *pt;
int side, startside;
int p;
/* don't check if bounds don't intersect */
if (sweptarea.xl > chain->bounds.xh || sweptarea.xh < chain->bounds. xl ||
sweptarea.yl > chain->bounds. yh || sweptarea.yh < chain->bounds. yl)
return false;
startside = -1; /* not started yet */
for (p=0, pt=chain->points ; p<chain->numpoints ; p++, pt++)
{
/* find side for pt */
#if 0
if (p>0)
{
PSmoveto ((pt-1)->x, (pt-1)->y);
PSlineto (pt->x,pt->y);
PSstroke ();
NXPing ();
}
#endif
if (BPointOnSide (pt, &ends[0]) == end0out)
{
startside = -1; /* off end */
continue;
}
if (BPointOnSide (pt, &ends[1]) == end1out)
{
startside = -1; /* off end */
continue;
}
if (BPointOnSide (pt, &sides[0]) == side0out)
side = 0;
else if (BPointOnSide (pt, &sides[1]) == side1out)
side = 1;
else
continue; /* in middle */
/* point is on one side or the other */
if (startside == -1 || startside == side)
{
startside = side;
continue;
}
/* opposite of startside */
return true; /* totally crossed area */
}
return false;
}
/*
====================
=
= BuildConnections
=
====================
*/
enum {si_north, si_east, si_south, si_west};
void BuildConnections (void)
{
int blockcount, passcount;
int i,j, k, s, bn;
int x,y;
bbox_t *bbox[2];
int walls[4];
bpoint_t points[2][2];
/* look for obscured sectors */
blockcount = passcount = 0;
bbox[0] = secboxes;
printf("\n");
for (i=0 ; i<numsectors-1 ; i++, bbox[0]++)
{
printf("connection #%d of %d\r",i,numsectors-1);
bbox[1] = bbox[0] + 1;
if (bbox[0]->xh - bbox[0]->xl < 64 || bbox[0]->yh - bbox[0]->yl < 64)
{ /* don't bother with small sectors (stairs, doorways, etc) */
continue;
}
for (j=i+1 ; j<numsectors ; j++, bbox[1]++)
{
if (bbox[1]->xh - bbox[1]->xl < 64 || bbox[1]->yh - bbox[1]->yl < 64)
{ /* don't bother with small sectors (stairs, doorways, etc) */
continue;
}
if (bbox[1]->xl <= bbox[0]->xh && bbox[1]->xh >= bbox[0]->xl &&
bbox[1]->yl <= bbox[0]->yh && bbox[1]->yh >= bbox[0]->yl)
{ /* touching sectors are never blocked */
passcount++;
continue;
}
sweptarea.xl = bbox[0]->xl < bbox[1]->xl ? bbox[0]->xl : bbox[1]->xl;
sweptarea.xh = bbox[0]->xh > bbox[1]->xh ? bbox[0]->xh : bbox[1]->xh;
sweptarea.yl = bbox[0]->yl < bbox[1]->yl ? bbox[0]->yl : bbox[1]->yl;
sweptarea.yh = bbox[0]->yh > bbox[1]->yh ? bbox[0]->yh : bbox[1]->yh;
/*
calculate the swept area between the sectors
*/
for (bn=0 ; bn<2 ; bn++)
{
memset (walls,0,sizeof(walls));
if (bbox[bn]->xl <= bbox[!bn]->xl)
walls[si_west] = 1;
if (bbox[bn]->xh >= bbox[!bn]->xh)
walls[si_east] = 1;
if (bbox[bn]->yl <= bbox[!bn]->yl)
walls[si_south] = 1;
if (bbox[bn]->yh >= bbox[!bn]->yh)
walls[si_north] = 1;
for (s=0 ; s<5 ; s++)
{
switch (s&3)
{
case si_north:
x = bbox[bn]->xl;
y = bbox[bn]->yh;
break;
case si_east:
x = bbox[bn]->xh;
y = bbox[bn]->yh;
break;
case si_south:
x = bbox[bn]->xh;
y = bbox[bn]->yl;
break;
case si_west:
x = bbox[bn]->xl;
y = bbox[bn]->yl;
break;
}
if (!walls[(s-1)&3] && walls[s&3])
{
points[bn][0].x = x;
points[bn][0].y = y;
}
if (walls[(s-1)&3] && !walls[s&3])
{
points[bn][1].x = x;
points[bn][1].y = y;
}
}
ends[bn].x = points[bn][0].x;
ends[bn].y = points[bn][0].y;
ends[bn].dx = points[bn][1].x - points[bn][0].x;
ends[bn].dy = points[bn][1].y - points[bn][0].y;
}
sides[0].x = points[0][0].x;
sides[0].y = points[0][0].y;
sides[0].dx = points[1][1].x - points[0][0].x;
sides[0].dy = points[1][1].y - points[0][0].y;
sides[1].x = points[0][1].x;
sides[1].y = points[0][1].y;
sides[1].dx = points[1][0].x - points[0][1].x;
sides[1].dy = points[1][0].y - points[0][1].y;
end0out = !BPointOnSide (&points[1][0], &ends[0]);
end1out = !BPointOnSide (&points[0][0], &ends[1]);
side0out = !BPointOnSide (&points[0][1], &sides[0]);
side1out = !BPointOnSide (&points[0][0], &sides[1]);
/*
look for a line change that covers the swept area
*/
for (k=0 ; k<numbchains ; k++)
{
if (!DoesChainBlock (&bchains[k]))
continue;
blockcount++;
connections[i*numsectors+j] = connections[j*numsectors+i] = 1;
/*
if (draw)
{
EraseWindow ();
DrawBBox (bbox[0]);
DrawBBox (bbox[1]);
DrawDivline (&ends[0]);
DrawDivline (&ends[1]);
DrawDivline (&sides[0]);
DrawDivline (&sides[1]);
DrawBChain (&bchains[k]);
}
*/
goto blocked;
}
/* nothing definately blocked the path */
passcount++;
blocked: ;
}
}
printf ("passcount: %i\nblockcount: %i\n",passcount, blockcount);
}
/*
====================
=
= BuildBlockingChains
=
====================
*/
void BuildBlockingChains (void)
{
boolean *used;
int i,j;
bpoint_t *temppoints, *pt_p;
bline_t *li1, *li2;
/* id chains_i; */
STORAGE *chains_i;
bchain_t bch;
int cx, cy;
#ifdef _STEVE_FIX_
used = malloc (numblines*sizeof (*used));
memset (used,0,numblines*sizeof (*used));
temppoints = malloc (numblines*sizeof (*temppoints));
#else
used = alloca (numblines*sizeof (*used));
memset (used,0,numblines*sizeof (*used));
temppoints = alloca (numblines*sizeof (*temppoints));
#endif
/*
chains_i = [[Storage alloc]
initCount: 0
elementSize: sizeof(bchain_t)
description: NULL];
*/
chains_i = (STORAGE *)SafeMalloc(sizeof(STORAGE));
chains_i->data = (bchain_t *)SafeMalloc(sizeof(bchain_t));
chains_i->count = 0;
chains_i->size = sizeof(bchain_t);
printf("\n");
li1 = blines;
for (i=0 ; i<numblines ; i++, li1++)
{
printf("bline #%d of %d\r",i,numblines);
if (used[i])
continue;
used[i] = true;
/* start a new chain */
pt_p = temppoints;
pt_p->x = li1->p1.x;
pt_p->y = li1->p1.y;
pt_p++;
pt_p->x = cx = li1->p2.x;
pt_p->y = cy = li1->p2.y;
pt_p++;
ClearBBox (&bch.bounds);
AddToBBox (&bch.bounds, li1->p1.x, li1->p1.y);
AddToBBox (&bch.bounds, cx, cy);
/* look for connected lines */
do
{
li2 = li1+1;
for (j=i+1 ; j<numblines ; j++,li2++)
if (!used[j] && li2->p1.x == cx && li2->p1.y == cy)
break;
if (j==numblines)
break; /* no more lines in chain */
/* add to chain */
used[j] = true;
pt_p->x = cx = li2->p2.x;
pt_p->y = cy = li2->p2.y;
pt_p++;
AddToBBox (&bch.bounds, cx, cy);
} while (1);
/* save the block chain */
bch.numpoints = pt_p - temppoints;
bch.points = (bpoint_t *)malloc (bch.numpoints*sizeof(*bch.points));
memcpy (bch.points, temppoints, bch.numpoints*sizeof(*bch.points));
/* [chains_i addElement: &bch]; */
memcpy((bchain_t *)chains_i->data + chains_i->count, &bch, sizeof(bchain_t));
chains_i->count += 1;
chains_i->data = (bchain_t *)realloc(chains_i->data,
sizeof(bchain_t) * (chains_i->count + 1));
/*DrawBChain (&bch); */
}
/*
numbchains = [chains_i count];
bchains = [chains_i elementAt:0];
*/
numbchains = chains_i->count;
bchains = chains_i->data;
#ifdef _STEVE_FIX_
free(used);
free(temppoints);
#endif
}
/*
====================
=
= ProcessConnections
=
====================
*/
void ProcessConnections (void)
{
int i, s, wlcount, count;
bbox_t *secbox;
/* id lines; */
STORAGE *lines;
worldline_t *wl;
mapvertex_t *vt;
maplinedef_t *p;
mapsidedef_t *sd;
bline_t bline;
int sec;
int RonsLines=0;
/*
numsectors = [secstore_i count];
wlcount = [linestore_i count];
*/
numsectors = secstore_i->count;
wlcount = linestore_i->count;
connections = (unsigned char *)malloc (numsectors*numsectors+8); /* allow rounding to bytes */
memset (connections, 0, numsectors*numsectors);
secboxes = secbox = (bbox_t *)malloc (numsectors*sizeof(bbox_t));
for (i=0 ; i<numsectors ; i++, secbox++)
ClearBBox (secbox);
/*
calculate bounding boxes for all sectors
count = [ldefstore_i count];
p = [ldefstore_i elementAt:0];
vt = [mapvertexstore_i elementAt:0];
*/
count = ldefstore_i->count;
p = ldefstore_i->data;
vt = mapvertexstore_i->data;
printf("\n");
for (i=0 ; i<count ; i++, p++)
{
printf("BBox #%d of %d\r",i,count);
for (s=0 ; s<1 ; s++)
{
if (p->sidenum[s] == -1)
continue; /* no back side */
/* add both points to sector bounding box */
/* sd = (mapsidedef_t *)[sdefstore_i elementAt: p->sidenum[s]]; */
sd = (mapsidedef_t *)sdefstore_i->data + p->sidenum[s];
sec = sd->sector;
AddToBBox (&secboxes[sec], vt[p->v1].x, vt[p->v1].y);
AddToBBox (&secboxes[sec], vt[p->v2].x, vt[p->v2].y);
}
}
/*
make a list of only the solid lines
*/
/*
lines = [[Storage alloc]
initCount: 0
elementSize: sizeof(bline)
description: NULL];
*/
/*
lines = SafeMalloc(sizeof(STORAGE));
lines->data = SafeMalloc(sizeof(bline));
lines->count = 0;
lines->size = sizeof(bline);
*/
/* wl = [linestore_i elementAt: 0]; */
printf("\n");
wl = linestore_i->data;
for (i=0; i<wlcount; wl++,i++)
{
if (wl->flags & ML_TWOSIDED)
continue;
RonsLines++;
}
lines = (STORAGE *)SafeMalloc(sizeof(STORAGE));
lines->data = (bline_t *)SafeCalloc(RonsLines,sizeof(bline));
lines->count = 0;
lines->size = sizeof(bline);
wl = linestore_i->data;
for ( i=0 ; i<wlcount ; wl++,i++)
{
printf("Line #%d of %d\r",i,wlcount);
if (wl->flags & ML_TWOSIDED)
continue; /* don't add two sided lines */
bline.p1.x = wl->p1.x;
bline.p1.y = wl->p1.y;
bline.p2.x = wl->p2.x;
bline.p2.y = wl->p2.y;
/* [lines addElement: &bline]; */
memcpy((bline_t *)lines->data + lines->count, &bline, sizeof(bline));
lines->count += 1;
/*
lines->data = (bline_t *)realloc(lines->data,
sizeof(bline_t) + (lines->count + 1));
*/
}
/*
blines = [lines elementAt: 0];
numblines = [lines count];
*/
blines = lines->data;
numblines = lines->count;
/*
build blocking chains
*/
printf("\nBuildBlockingChains\n");
BuildBlockingChains ();
/*
build connection list
*/
printf("\nBuildConnections\n");
BuildConnections ();
}
/*
=================
=
= OutputConnections
=
=================
*/
void OutputConnections (void)
{
int i;
int bytes;
char *cons;
char *bits;
cons = connections;
bytes = (numsectors*numsectors+7)/8;
bits = (char *)malloc(bytes);
for (i=0 ; i<bytes ; i++)
{
bits[i] = cons[0] + (cons[1]<<1) + (cons[2]<<2) + (cons[3]<<3) + (cons[4]<<4) + (cons[5]<<5) + (cons[6]<<6) + (cons[7]<<7);
cons +=8;
}
/* [wad_i addName: "reject" data:bits size:bytes]; */
addName("reject", bits, bytes);
printf ("reject: %i\n",bytes);
}