game.cpp

MUD游戏编程光盘代码

    std::list<enemy>::iterator enemyitr = p_room->Enemies().begin();
    while( enemyitr != p_room->Enemies().end() )
    {
        temp += (*enemyitr)->Name() + ", ";
        count++;
        ++enemyitr;
    }

    if( count > 0 )
    {
        temp.erase( temp.size() - 2, 2 );
        desc += temp + "\r\n";
    }


    return desc;
}

void Game::SendRoom( string p_text, room p_room )
{
    std::for_each( p_room->Players().begin(),
                   p_room->Players().end(),
                   playersend( p_text ) );
}



void Game::Move( int p_direction )
{
    Player& p = *m_player;
    room next = p.CurrentRoom()->Adjacent( p_direction );
    room previous = p.CurrentRoom();

    if( next == 0 )
    {
        SendRoom( red + p.Name() + " bumps into the wall to the " +
                  DIRECTIONSTRINGS[p_direction] + "!!!",
                  p.CurrentRoom() );
        return;
    }

    previous->RemovePlayer( p.ID() );

    SendRoom( green + p.Name() + " leaves to the " + 
              DIRECTIONSTRINGS[p_direction] + ".",
              previous );
    SendRoom( green + p.Name() + " enters from the " + 
              DIRECTIONSTRINGS[OppositeDirection(p_direction)] + ".",
              next );
    p.SendString( green + "You walk " + DIRECTIONSTRINGS[p_direction] + "." );

    p.CurrentRoom() = next;
    next->AddPlayer( p.ID() );

    p.SendString( PrintRoom( next ) );
}



void Game::GetItem( string p_item )
{
    Player& p = *m_player;

    if( p_item[0] == '$' )
    {
        // clear off the '$', and convert the result into a number.
        p_item.erase( 0, 1 );
        money m = BasicLib::totype<money>( p_item );

        // make sure there's enough money in the room
        if( m > p.CurrentRoom()->Money() )
        {
            p.SendString( red + bold + "There isn't that much here!" );
        }
        else
        {
            p.Money() += m;
            p.CurrentRoom()->Money() -= m;
            SendRoom( cyan + bold + p.Name() + " picks up $" + 
                      tostring( m ) + ".", p.CurrentRoom() );
        }
        return;
    }

    item i = p.CurrentRoom()->FindItem( p_item );

    if( i == 0 )
    {
        p.SendString( red + bold + "You don't see that here!" );
        return;
    }

    if( !p.PickUpItem( i ) )
    {
        p.SendString( red + bold + "You can't carry that much!" );
        return;
    }

    p.CurrentRoom()->RemoveItem( i );
    SendRoom( cyan + bold + p.Name() + " picks up " + i->Name() + ".", 
              p.CurrentRoom() );
}


void Game::DropItem( string p_item )
{
    Player& p = *m_player;

    if( p_item[0] == '$' )
    {
        // clear off the '$', and convert the result into a number.
        p_item.erase( 0, 1 );
        money m = BasicLib::totype<money>( p_item );

        // make sure there's enough money in the inventory
        if( m > p.Money() )
        {
            p.SendString( red + bold + "You don't have that much!" );
        }
        else
        {
            p.Money() -= m;
            p.CurrentRoom()->Money() += m;
            SendRoom( cyan + bold + p.Name() + " drops $" + 
                      tostring( m ) + ".", p.CurrentRoom() );
        }
        return;
    }

    int i = p.GetItemIndex( p_item );

    if( i == -1 )
    {
        p.SendString( red + bold + "You don't have that!" );
        return;
    }

    SendRoom( cyan + bold + p.Name() + " drops " +
                p.GetItem( i )->Name() + ".", p.CurrentRoom() );
    p.CurrentRoom()->AddItem( p.GetItem( i ) );
    p.DropItem( i );
}


void Game::GotoTrain()
{
            Player& p = *m_player;
            p.Active() = false;
            p.Conn()->AddHandler( new Train( *m_connection, p.ID() ) );
            LogoutMessage( p.Name() + " leaves to edit stats" );
}


string Game::StoreList( entityid p_store )
{
    Store& s = StoreDatabase::get( p_store );

    string output = white + bold + 
              "--------------------------------------------------------------------------------\r\n";
    output += " Welcome to " + s.Name() + "!\r\n";
    output += "--------------------------------------------------------------------------------\r\n";
    output += " Item                           | Price\r\n";
    output += "--------------------------------------------------------------------------------\r\n";

    Store::iterator itr = s.begin();
    while( itr != s.end() )
    {
        output += " " + tostring( (*itr)->Name(), 31 ) + "| ";
        output += tostring( (*itr)->Price() ) + "\r\n";
        ++itr;
    }
    output += bold + 
              "--------------------------------------------------------------------------------\r\n";

    return output;
}

void Game::Buy( const string& p_item )
{
    Player& p = *m_player;
    Store& s = StoreDatabase::get( p.CurrentRoom()->Data() );

    item i = s.find( p_item );
    if( i == 0 )
    {
        p.SendString( red + bold + "Sorry, we don't have that item!" );
        return;
    }

    if( p.Money() < i->Price() )
    {
        p.SendString( red + bold + "Sorry, but you can't afford that!" );
        return;
    }

    if( !p.PickUpItem( i ) )
    {
        p.SendString( red + bold + "Sorry, but you can't carry that much!" );
        return;
    }

    p.Money() -= i->Price();
    SendRoom( cyan + bold + p.Name() + " buys a " + i->Name(), 
              p.CurrentRoom() );
}




void Game::Sell( const string& p_item )
{
    Player& p = *m_player;
    Store& s = StoreDatabase::get( p.CurrentRoom()->Data() );

    int index = p.GetItemIndex( p_item );
    if( index == -1 )
    {
        p.SendString( red + bold + "Sorry, you don't have that!" );
        return;
    }

    item i = p.GetItem( index );
    if( !s.has( i ) )
    {
        p.SendString( red + bold + "Sorry, we don't want that item!" );
        return;
    }

    p.DropItem( index );
    p.Money() += i->Price();
    SendRoom( cyan + bold + p.Name() + " sells a " + i->Name(), 
              p.CurrentRoom() );
}



void Game::EnemyAttack( enemy p_enemy )
{
    Enemy& e = *p_enemy;
    room r = e.CurrentRoom();

    std::list<player>::iterator itr = r->Players().begin();

    std::advance( itr, BasicLib::RandomInt( 0, r->Players().size() - 1 ) );
 
    Player& p = **itr;

    sint64 now = Game::GetTimer().GetMS();

    int damage;
    if( e.Weapon() == 0 )
    {
        damage = BasicLib::RandomInt( 1, 3 );
        e.NextAttackTime() = now + seconds( 1 );
    }
    else
    {
        damage = BasicLib::RandomInt( e.Weapon()->Min(), e.Weapon()->Max() );
        e.NextAttackTime() = now + seconds( e.Weapon()->Speed() );
    }

    if( BasicLib::RandomInt( 0, 99 ) >= e.Accuracy() - p.GetAttr( DODGING ) )
    {
        Game::SendRoom( white + e.Name() + " swings at " + p.Name() + 
                        " but misses!", e.CurrentRoom() );
        return;
    }

    damage += e.StrikeDamage();
    damage -= p.GetAttr( DAMAGEABSORB );

    if( damage < 1 )
        damage = 1;

    p.AddHitpoints( -damage );

    Game::SendRoom( red + e.Name() + " hits " + p.Name() + " for " + 
                    tostring( damage ) + " damage!", e.CurrentRoom() );


    if( p.HitPoints() <= 0 )
        PlayerKilled( p.ID() );
}

void Game::PlayerKilled( player p_player )
{
    Player& p = *p_player;

    Game::SendRoom( red + bold + p.Name() + " has died!", p.CurrentRoom() );
    
    // drop the money
    money m = p.Money() / 10;
    if( m > 0 )
    {
        p.CurrentRoom()->Money() += m;
        p.Money() -= m;
        Game::SendRoom( cyan + "$" + tostring( m ) + 
                        " drops to the ground.", p.CurrentRoom() );
    }

    // drop an item
    if( p.Items() > 0 )
    {
        int index = -1;

        // loop through random numbers until you hit a valid item.
        while( p.GetItem( index = RandomInt( 0, PLAYERITEMS - 1 ) ) == 0 );
        item i = p.GetItem( index );
        p.CurrentRoom()->AddItem( i );
        p.DropItem( index );

        Game::SendRoom( cyan + i->Name() + " drops to the ground.", 
                        p.CurrentRoom() );
    }

    // subtract 10% experience
    int exp = p.Experience() / 10;
    p.Experience() -= exp;
    
    // remove the player from the room and transport him to room 1.
    p.CurrentRoom()->RemovePlayer( p_player );
    p.CurrentRoom() = 1;
    p.CurrentRoom()->AddPlayer( p_player );

    // set the hitpoints to 70% 
    p.SetHitpoints( (int)(p.GetAttr( MAXHITPOINTS ) * 0.7) );
    p.SendString( white + bold + "You have died, but have been ressurected in " +
                  p.CurrentRoom()->Name() );
    p.SendString( red + bold + "You have lost " + tostring( exp ) + " experience!" );
    Game::SendRoom( white + bold + p.Name() + " appears out of nowhere!!" , p.CurrentRoom() );
}



void Game::PlayerAttack( const string& p_enemy )
{
    Player& p = *m_player;
    sint64 now = Game::GetTimer().GetMS();

    if( now < p.NextAttackTime() )
    {
        p.SendString( red + bold + "You can't attack yet!" );
        return;
    }


    enemy ptr = p.CurrentRoom()->FindEnemy( p_enemy );

    if( ptr == 0 )
    {
        p.SendString( red + bold + "You don't see that here!" );
        return;
    }

    Enemy& e = *ptr;

    int damage;
    if( p.Weapon() == 0 )
    {
        damage = BasicLib::RandomInt( 1, 3 );
        p.NextAttackTime() = now + seconds( 1 );
    }
    else
    {
        damage = BasicLib::RandomInt( p.Weapon()->Min(), p.Weapon()->Max() );
        p.NextAttackTime() = now + seconds( p.Weapon()->Speed() );
    }

    if( BasicLib::RandomInt( 0, 99 ) >= p.GetAttr( ACCURACY ) - e.Dodging() )
    {
        SendRoom( white + p.Name() + " swings at " + e.Name() + 
                  " but misses!", p.CurrentRoom() );
        return;
    }

    damage += p.GetAttr( STRIKEDAMAGE );
    damage -= e.DamageAbsorb();

    if( damage < 1 )
        damage = 1;

    e.HitPoints() -= damage;

    SendRoom( red + p.Name() + " hits " + e.Name() + " for " + 
              tostring( damage ) + " damage!", p.CurrentRoom() );


    if( e.HitPoints() <= 0 )
        EnemyKilled( e.ID(), m_player );
}


void Game::EnemyKilled( enemy p_enemy, player p_player )
{
    Enemy& e = *p_enemy;

    SendRoom( cyan + bold + e.Name() + " has died!", e.CurrentRoom() );
    

    // drop the money
    money m = BasicLib::RandomInt( e.MoneyMin(), e.MoneyMax() );
    if( m > 0 )
    {
        e.CurrentRoom()->Money() += m;
        SendRoom( cyan + "$" + tostring( m ) + 
                " drops to the ground.", e.CurrentRoom() );
    }

    // drop all the items
    std::list<loot>::iterator itr = e.LootList().begin();
    while( itr != e.LootList().end() )
    {
        if( BasicLib::RandomInt( 0, 99 ) < itr->second )
        {
            e.CurrentRoom()->AddItem( itr->first );
            SendRoom( cyan + (itr->first)->Name() + 
                      " drops to the ground.", e.CurrentRoom() );
        }
        ++itr;
    }

    // add experience to the player who killed it
    Player& p = *p_player;
    p.Experience() += e.Experience();
    p.SendString( cyan + bold + "You gain " + tostring( e.Experience() ) +
                    " experience." );
    
    // remove the enemy from the game
    EnemyDatabase::Delete( p_enemy );
}

}   // end namespace SimpleMUD