Function player_shield_class

crawl-ref/source/player.cc:2281–2325

* Calculate the SH value used internally. * * Exactly twice the value displayed to players, for legacy reasons. * @param Whether to include temporary effects like TSO's divine shield. * @return The player's current SH value. */

 * @return      The player's current SH value.
 */
int player_shield_class(int scale, bool random, bool ignore_temporary)
{
    int shield = 0;

    if (!ignore_temporary && you.incapacitated())
        return 0;

    const item_def *shield_item = you.shield();
    if (shield_item)
        shield += _sh_from_shield(*shield_item);

    // mutations
    // +4, +6, +8 (displayed values)
    shield += (you.get_mutation_level(MUT_LARGE_BONE_PLATES) > 0
               ? you.get_mutation_level(MUT_LARGE_BONE_PLATES) * 400 + 400
               : 0);

    // Icemail and Ephemeral Shield aren't active all of the time, so consider
    // them temporary; this behaviour is consistent with how icemail's AC
    // is dealt with.
    if (!ignore_temporary
        && you.get_mutation_level(MUT_CONDENSATION_SHIELD) > 0
        && !you.duration[DUR_ICEMAIL_DEPLETED])
    {
        shield += ICEMAIL_MAX * 100;
    }
    if (!ignore_temporary
        && you.get_mutation_level(MUT_EPHEMERAL_SHIELD)
        && you.duration[DUR_EPHEMERAL_SHIELD])
    {
        shield += you.get_mutation_level(MUT_EPHEMERAL_SHIELD) * 1400;
    }

    shield += qazlal_sh_boost() * 100;
    shield += you.wearing_jewellery(AMU_REFLECTION) * AMU_REFLECT_SH * 100;
    shield += you.scan_artefacts(ARTP_SHIELDING) * 200;

    if (!ignore_temporary && you.duration[DUR_PARRYING])
        shield += player_parrying() * 200;

    if (you.has_mutation(MUT_RECKLESS))
        shield /= 2;

    return random ? div_rand_round(shield * scale, 100) : ((shield * scale) / 100);
}

/**
 * Calculate the SH value that should be displayed to players.