Function unset_seenv

src/display.c:3383–3393

Called by blackout(vault.c) when vault guard removes temporary corridor, turning spot back into stone; is an adjacent spot. */

/* Called by blackout(vault.c) when vault guard removes temporary corridor,
   turning spot <x0,y0> back into stone; <x1,y1> is an adjacent spot. */
void
unset_seenv(
    struct rm *lev,         /* &levl[x1][y1] */
    coordxy x0, coordxy y0, /* from */
    coordxy x1, coordxy y1) /*  to; abs(x1-x0)==1 && abs(y0-y1)==1 */

{
    coordxy dx = x1 - x0, dy = y0 - y1;

    lev->seenv &= ~seenv_matrix[dy + 1][dx + 1];
}

/* ------------------------------------------------------------------------ */