DOOM Companion (Alt)/DOOM Companion CD-ROM - iso/DOOM Companion CD-ROM.iso/other/doombsp/doomload.m

Text File | 1994-04-06 | 4.4 KB | 219 lines

// doomload.m
#import "doombsp.h"


int        linenum = 0;

/*
=================
=
= ReadLine
=
=================
*/

worldline_t *ReadLine (FILE *file)
{
    worldline_t    *line;
    NXPoint        *p1, *p2;
    worldside_t    *s;
    sectordef_t    *e;
    int            i;

    line = malloc(sizeof(*line));
    memset (line, 0, sizeof(*line));

    p1 = &line->p1;
    p2 = &line->p2;

    if (fscanf (file,"(%f,%f) to (%f,%f) : %d : %d : %d\n"
        ,&p1->x, &p1->y,&p2->x, &p2->y,&line->flags
        , &line->special, &line->tag) != 7)
        Error ("Failed ReadLine");

    for (i=0 ; i<=  ( (line->flags&ML_TWOSIDED) != 0) ; i++)
    {
        s = &line->side[i];
        if (fscanf (file,"    %d (%d : %s / %s / %s )\n"
            ,&s->firstrow, &s->firstcollumn, s->toptexture, s->bottomtexture, s->midtexture) != 5)
            Error ("Failed ReadLine (side)");
        e = &s->sectordef;
        if (fscanf (file,"    %d : %s %d : %s %d %d %d\n"
            ,&e->floorheight, e->floorflat, &e->ceilingheight
            ,e->ceilingflat,&e->lightlevel, &e->special, &e->tag) != 7)
            Error ("Failed ReadLine (sector)");
        if (!strcmp (e->floorflat,"-"))
            printf ("WARNING: line %i has no sectordef\n",linenum);
    }

    linenum++;

    return line;
}

/*
=================
=
= ReadThing
=
=================
*/

worldthing_t *ReadThing (FILE *file)
{
    int                x,y;
    worldthing_t    *thing;

    thing = malloc(sizeof(*thing));
    memset (thing, 0, sizeof(*thing));

    if (fscanf (file,"(%i,%i, %d) :%d, %d\n"
        ,&x, &y, &thing->angle, &thing->type, &thing->options) != 5)
        Error ("Failed ReadThing");

    thing->origin.x = x & -16;
    thing->origin.y = y & -16;

    return thing;
}

/*
==================
=
= LineOverlaid
=
= Check to see if the line is colinear and overlapping any previous lines
==================
*/

typedef struct
{
    float    left, right, top, bottom;
} bbox_t;

void BBoxFromPoints (bbox_t *box, NXPoint *p1, NXPoint *p2)
{
    if (p1->x < p2->x)
    {
        box->left = p1->x;
        box->right = p2->x;
    }
    else
    {
        box->left = p2->x;
        box->right = p1->x;
    }
    if (p1->y < p2->y)
    {
        box->bottom = p1->y;
        box->top = p2->y;
    }
    else
    {
        box->bottom = p2->y;
        box->top = p1->y;
    }
}

boolean LineOverlaid (worldline_t *line)
{
    int        j, count;
    worldline_t    *scan;
    divline_t    wl;
    bbox_t        linebox, scanbox;

    wl.pt = line->p1;
    wl.dx = line->p2.x - line->p1.x;
    wl.dy = line->p2.y - line->p1.y;

    count = [linestore_i count];
    scan = [linestore_i elementAt:0];
    for (j=0 ; j<count ; j++, scan++)
    {
        if (PointOnSide (&scan->p1, &wl) != -1)
            continue;
        if (PointOnSide (&scan->p2, &wl) != -1)
            continue;
    // line is colinear, see if it overlapps
        BBoxFromPoints (&linebox, &line->p1, &line->p2);
        BBoxFromPoints (&scanbox, &scan->p1, &scan->p2);

        if (linebox.right  > scanbox.left && linebox.left < scanbox.right)
            return true;
        if (linebox.bottom < scanbox.top && linebox.top > scanbox.bottom)
            return true;
    }
    return false;
}

/*
===================
=
= LoadDoomMap
=
===================
*/

id    linestore_i, thingstore_i;

void LoadDoomMap (char *mapname)
{
    FILE         *file;
    int            i, version;
    int            linecount, thingcount;
    worldline_t    *line;

    file = fopen (mapname,"r");
    if (!file)
        Error ("LoadDoomMap: couldn't open %s", mapname);

    if (!fscanf (file, "WorldServer version %d\n", &version) || version != 4)
        Error ("LoadDoomMap: not a version 4 doom map");
    printf ( "Loading version 4 doom map: %s\n",mapname);

//
// read lines
//
    if (fscanf (file,"\nlines:%d\n",&linecount) != 1)
        Error ("LoadDoomMap: can't read linecount");
    printf ("%i lines\n", linecount);
    linestore_i = [[Storage alloc]
        initCount:        0
        elementSize:    sizeof(worldline_t)
        description:    NULL];

    for (i=0 ; i<linecount ; i++)
    {
        line = ReadLine (file);
        if (line->p1.x == line->p2.x && line->p1.y == line->p2.y)
        {
            printf ("WARNING: line %i is length 0 (removed)\n",i);
            continue;
        }
        if (LineOverlaid (line))
        {
            printf ("WARNING: line %i is overlaid (removed)\n",i);
            continue;
        }
        [linestore_i addElement: line];
    }

//
// read things
//
    if (fscanf (file,"\nthings:%d\n",&thingcount) != 1)
        Error ("LoadDoomMap: can't read thingcount");
    printf ( "%i things\n", thingcount);
    thingstore_i = [[Storage alloc]
        initCount:        0
        elementSize:    sizeof(worldthing_t)
        description:    NULL];

    for (i=0 ; i<thingcount ; i++)
        [thingstore_i addElement: ReadThing (file)];

    fclose (file);

}