Function block_point

src/vision.c:864–891

* block_point() * * Make the location opaque to light. */

 * Make the location opaque to light.
 */
void
block_point(int x, int y)
{
#ifdef DEBUG
    /* set DEBUGFILES=seethru in environment to see through clouds & water */
    if (gs.seethru == 0) { /* init once */
        gs.seethru = (wizard && explicitdebug("seethru")) ? 1 : -1;
    }
    if (gs.seethru == 1) {
        if (!does_block(x, y, &levl[x][y]))
            return;
    }
#endif

    fill_point(y, x);

    /* recalc light sources here? */

    /*
     * We have to do a full vision recalculation if we "could see" the
     * location.  Why? Suppose some monster opened a way so that the
     * hero could see a lit room.  However, the position of the opening
     * was out of night-vision range of the hero.  Suddenly the hero should
     * see the lit room.
     */
    if (gv.viz_array[y][x])
        gv.vision_full_recalc = 1;
}

/*
 * unblock_point()