C++ item::is_comestible方法代码示例

std::pair<int, int> player::fun_for( const item &comest ) const
{
    static const trait_id trait_GOURMAND( "GOURMAND" );
    static const trait_id trait_SAPROPHAGE( "SAPROPHAGE" );
    static const trait_id trait_SAPROVORE( "SAPROVORE" );
    static const std::string flag_EATEN_COLD( "EATEN_COLD" );
    static const std::string flag_COLD( "COLD" );
    if( !comest.is_comestible() ) {
        return std::pair<int, int>( 0, 0 );
    }

    // As float to avoid rounding too many times
    float fun = comest.type->comestible->fun;
    // Rotten food should be pretty disgusting
    const float relative_rot = comest.get_relative_rot();
    if( relative_rot > 1.0f && !has_trait( trait_SAPROPHAGE ) && !has_trait( trait_SAPROVORE ) ) {
        const float rottedness = clamp( 2 * relative_rot - 2.0f, 0.1f, 1.0f );
        // Three effects:
        // penalty for rot goes from -2 to -20
        // bonus for tasty food drops from 90% to 0%
        // disgusting food unfun increases from 110% to 200%
        fun -= rottedness * 10;
        if( fun > 0 ) {
            fun *= ( 1.0f - rottedness );
        } else {
            fun *= ( 1.0f + rottedness );
        }
    }

    float fun_max = fun < 0 ? fun * 6 : fun * 3;
    if( comest.has_flag( flag_EATEN_COLD ) && comest.has_flag( flag_COLD ) ) {
        if( fun > 0 ) {
            fun *= 3;
        } else {
            fun = 1;
            fun_max = 5;
        }
    }

    if( has_trait( trait_GOURMAND ) ) {
        if( fun < -1 ) {
            fun_max = fun;
            fun /= 2;
        } else if( fun > 0 ) {
            fun_max = fun_max * 3 / 2;
            fun *= 3;
        }
    }

    return std::pair<int, int>( fun, fun_max );
}

// TODO: Move pizza scraping here.
// Same for other kinds of nutrition alterations
// This is used by item display, making actual nutrition available to player.
int player::nutrition_for( const item &comest ) const
{
    static const trait_id trait_CARNIVORE( "CARNIVORE" );
    static const trait_id trait_GIZZARD( "GIZZARD" );
    static const trait_id trait_SAPROPHAGE( "SAPROPHAGE" );
    static const std::string flag_CARNIVORE_OK( "CARNIVORE_OK" );
    if( !comest.is_comestible() ) {
        return 0;
    }

    // As float to avoid rounding too many times
    float nutr = comest.type->comestible->nutr;

    if( has_trait( trait_GIZZARD ) ) {
        nutr *= 0.6f;
    }


    if( has_trait( trait_CARNIVORE ) && comest.has_flag( flag_CARNIVORE_OK ) &&
        comest.has_any_flag( carnivore_blacklist ) ) {
        // TODO: Comment pizza scrapping
        nutr *= 0.5f;
    }

    const float relative_rot = comest.get_relative_rot();
    // Saprophages get full nutrition from rotting food
    if( relative_rot > 1.0f && !has_trait( trait_SAPROPHAGE ) ) {
        // everyone else only gets a portion of the nutrition
        // Scaling linearly from 100% at just-rotten to 0 at halfway-rotten-away
        const float rottedness = clamp( 2 * relative_rot - 2.0f, 0.1f, 1.0f );
        nutr *= ( 1.0f - rottedness );
    }

    // Bio-digestion gives extra nutrition
    if( has_bionic( bio_digestion ) ) {
        nutr *= 1.5f;
    }

    return ( int )nutr;
}

void player::consume_effects( const item &food )
{
    if( !food.is_comestible() ) {
        debugmsg( "called player::consume_effects with non-comestible" );
        return;
    }
    const auto &comest = *food.type->comestible;

    const int capacity = stomach_capacity();
    if( has_trait( trait_id( "THRESH_PLANT" ) ) && food.type->can_use( "PLANTBLECH" ) ) {
        // Just keep nutrition capped, to prevent vomiting
        cap_nutrition_thirst( *this, capacity, true, true );
        return;
    }
    if( ( has_trait( trait_id( "HERBIVORE" ) ) || has_trait( trait_id( "RUMINANT" ) ) ) &&
        food.has_any_flag( herbivore_blacklist ) ) {
        // No good can come of this.
        return;
    }

    // Rotten food causes health loss
    const float relative_rot = food.get_relative_rot();
    if( relative_rot > 1.0f && !has_trait( trait_id( "SAPROPHAGE" ) ) &&
        !has_trait( trait_id( "SAPROVORE" ) ) && !has_bionic( bio_digestion ) ) {
        const float rottedness = clamp( 2 * relative_rot - 2.0f, 0.1f, 1.0f );
        // ~-1 health per 1 nutrition at halfway-rotten-away, ~0 at "just got rotten"
        // But always round down
        int h_loss = -rottedness * comest.nutr;
        mod_healthy_mod( h_loss, -200 );
        add_msg( m_debug, "%d health from %0.2f%% rotten food", h_loss, rottedness );
    }

    const auto nutr = nutrition_for( food );
    mod_hunger( -nutr );
    mod_thirst( -comest.quench );
    mod_stomach_food( nutr );
    mod_stomach_water( comest.quench );
    if( comest.healthy != 0 ) {
        // Effectively no cap on health modifiers from food
        mod_healthy_mod( comest.healthy, ( comest.healthy >= 0 ) ? 200 : -200 );
    }

    if( comest.stim != 0 &&
        ( abs( stim ) < ( abs( comest.stim ) * 3 ) ||
          sgn( stim ) != sgn( comest.stim ) ) ) {
        if( comest.stim < 0 ) {
            stim = std::max( comest.stim * 3, stim + comest.stim );
        } else {
            stim = std::min( comest.stim * 3, stim + comest.stim );
        }
    }
    add_addiction( comest.add, comest.addict );
    if( addiction_craving( comest.add ) != MORALE_NULL ) {
        rem_morale( addiction_craving( comest.add ) );
    }

    // Morale is in minutes
    int morale_time = HOURS( 2 ) / MINUTES( 1 );
    if( food.has_flag( "HOT" ) && food.has_flag( "EATEN_HOT" ) ) {
        morale_time = HOURS( 3 ) / MINUTES( 1 );
        int clamped_nutr = std::max( 5, std::min( 20, nutr / 10 ) );
        add_morale( MORALE_FOOD_HOT, clamped_nutr, 20, morale_time, morale_time / 2 );
    }

    std::pair<int, int> fun = fun_for( food );
    if( fun.first < 0 ) {
        add_morale( MORALE_FOOD_BAD, fun.first, fun.second, morale_time, morale_time / 2, false,
                    food.type );
    } else if( fun.first > 0 ) {
        add_morale( MORALE_FOOD_GOOD, fun.first, fun.second, morale_time, morale_time / 2, false,
                    food.type );
    }

    const bool hibernate = has_active_mutation( trait_id( "HIBERNATE" ) );
    if( hibernate ) {
        if( ( nutr > 0 && get_hunger() < -60 ) || ( comest.quench > 0 && get_thirst() < -60 ) ) {
            //Tell the player what's going on
            add_msg_if_player( _( "You gorge yourself, preparing to hibernate." ) );
            if( one_in( 2 ) ) {
                //50% chance of the food tiring you
                mod_fatigue( nutr );
            }
        }
        if( ( nutr > 0 && get_hunger() < -200 ) || ( comest.quench > 0 && get_thirst() < -200 ) ) {
            //Hibernation should cut burn to 60/day
            add_msg_if_player( _( "You feel stocked for a day or two. Got your bed all ready and secured?" ) );
            if( one_in( 2 ) ) {
                //And another 50%, intended cumulative
                mod_fatigue( nutr );
            }
        }

        if( ( nutr > 0 && get_hunger() < -400 ) || ( comest.quench > 0 && get_thirst() < -400 ) ) {
            add_msg_if_player(
                _( "Mmm.  You can still fit some more in...but maybe you should get comfortable and sleep." ) );
            if( !one_in( 3 ) ) {
                //Third check, this one at 66%
                mod_fatigue( nutr );
            }
        }
//.........这里部分代码省略.........

bool player::can_consume_as_is( const item &it ) const
{
    return it.is_comestible() || get_cbm_rechargeable_with( it ) != rechargeable_cbm::none;
}