// illuminate an invisible player inside the halo

    // Backlight an invisible player inside a halo.

                // illuminate all invisible monsters inside the halo

                // Backlight invisible monsters inside a halo.

bool player::backlit() const

bool player::backlit(bool check_halo) const

    return (magic_contamination >= 5 || duration[DUR_BACKLIGHT]);

    return (magic_contamination >= 5 || duration[DUR_BACKLIGHT]
        || ((check_halo) ? halo_radius() : false));

    if (you.backlit())

    // Don't display "Glow" for a visible player inside a halo.
    if (you.backlit(you.duration[DUR_INVIS]))

bool monsters::backlit() const

bool monsters::backlit(bool check_halo) const

    return (has_ench(ENCH_BACKLIGHT));

    return (has_ench(ENCH_BACKLIGHT)
        || ((check_halo) ? inside_halo(x, y) : false));

    virtual bool backlit() const = 0;

    virtual bool backlit(bool check_halo = true) const = 0;

    bool backlit() const;

    bool backlit(bool check_halo = true) const;

    bool backlit() const;

    bool backlit(bool check_halo = true) const;

    // invisible players inside a halo don't lose backlight
    if (you.duration[DUR_BACKLIGHT] > 0
        && (!halo_radius() || !you.duration[DUR_INVIS])
        && !--you.duration[DUR_BACKLIGHT] && !you.backlit())

    if (you.duration[DUR_BACKLIGHT] > 0 && !--you.duration[DUR_BACKLIGHT]
        && !you.backlit())

        mpr("You are no longer glowing.", MSGCH_DURATION);

        // An invisible player inside a halo doesn't lose backlight.
        if (you.duration[DUR_INVIS] && halo_radius())
            you.duration[DUR_BACKLIGHT] = 1;
        else
            mpr("You are no longer glowing.", MSGCH_DURATION);