Function cvt_to_abscoord

src/sp_lev.c:4771–4788

guts of nhl_abs_coord; convert a coordinate relative to a map or room * into an absolute coordinate in svl.level.locations. * * If there is no enclosing map or room, the coordinates are assumed to be * absolute already. * * Part of the reason this is a function is to make it clearer in the calling * code that this conversion is what is intended. * * NOTE: if the coordinates are going to g

 * doesn't is the input coordinates being negative. get_location will treat
 * that as "level designer wants a random coordinate".) */
void
cvt_to_abscoord(coordxy *x, coordxy *y)
{
    /* since commit 99715e0, xstart and ystart are only relevant in mklev when
     * maps are being used, and 0 otherwise. It is possible in the future that
     * map positions and dimensions can be saved and retrieved outside of
     * mklev which would reintroduce nonzero xstart/ystart/xsiz/ysiz, but
     * this is not currently implemented, so this function can be assumed to
     * have no effect outside of mklev.
     */
    if (gc.coder && gc.coder->croom) {
        *x += gc.coder->croom->lx;
        *y += gc.coder->croom->ly;
    } else {
        *x += gx.xstart;
        *y += gy.ystart;
    }
}

/* inverse of cvt_to_abscoord; turn an absolute svl.level.locations coordinate
 * into one relative to the current map or room. */