Function get_location

src/sp_lev.c:1201–1269

* Translate a given coordinate from a special level definition into an actual * location on the map. * * If x or y is negative, we generate a random coordinate within the area. If * not negative, they are interpreted as relative to the last defined map or * room, and are output as absolute svl.level.locations coordinates. * * The "humidity" flag is used to ensure that engravings aren't crea

 * underwater, or eels on dry land.
 */
staticfn void
get_location(
    coordxy *x, coordxy *y,
    getloc_flags_t humidity,
    struct mkroom *croom)
{
    int cpt = 0;
    int mx, my, sx, sy;

    if (croom) {
        mx = croom->lx;
        my = croom->ly;
        sx = croom->hx - mx + 1;
        sy = croom->hy - my + 1;
    } else {
        mx = gx.xstart;
        my = gy.ystart;
        sx = gx.xsize;
        sy = gy.ysize;
    }

    if (*x >= 0) { /* normal locations */
        *x += mx;
        *y += my;
    } else { /* random location */
        do {
            if (croom) { /* handle irregular areas */
                coord tmpc;
                (void) somexy(croom, &tmpc);
                *x = tmpc.x;
                *y = tmpc.y;
            } else {
                *x = mx + rn2((int) sx);
                *y = my + rn2((int) sy);
            }
            if (is_ok_location(*x, *y, humidity))
                break;
        } while (++cpt < 100);
        if (cpt >= 100) {
            int xx, yy;

            /* last try */
            for (xx = 0; xx < sx; xx++)
                for (yy = 0; yy < sy; yy++) {
                    *x = mx + xx;
                    *y = my + yy;
                    if (is_ok_location(*x, *y, humidity))
                        goto found_it;
                }
            if (!(humidity & NO_LOC_WARN)) {
                impossible("get_location:  can't find a place!");
            } else {
                *x = *y = -1;
            }
        }
    }
 found_it:
    ;