天行健 君子当自强而不息

Controlling Players and Characters(37)

Whenever a character needs updating, rendering, or what have you, a pointer to
the linked list of characters is needed in order to iterate the list. Either that or
maybe your application needs access to the character data. Either way, the following
functions will help you out:

    sCharacter* get_root_char()
    {
        
return m_root_char;
    }

    sCharacter* get_char(
long id)
    {
        
for(sCharacter* character = m_root_char; character != NULL; character = character->next)
        {
            
if(id == character->id)
                
return character;
        }

        
return NULL;
    }

During specific functions, it becomes necessary for characters (such as monsters)
to make sure that they can see another character before attacking or casting a spell.
A function of your design is required to verify that such a line of sight is clear.
Returning a value of true states that a character is in sight of another one:


    virtual bool line_of_sight(sCharacter* source, sCharacter* target,
                               
float source_x, float source_y, float source_z,
                               
float target_x, float target_y, float target_z)
    {
        
// make sure there is a line of sight between characters.

        
return true;
    }

When the character controller (or outside code) needs one of the character’s abilities,
it needs to retrieve it with the following group of functions. These functions
take into account the various modifiers such as status ailments and equipped items:


    long get_to_hit(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
long to_hit = character->char_def.to_hit;

        
if(character->ailments & AILMENT_BLIND)
            to_hit *= 0.75f;

        
if(character->ailments & AILMENT_HAWKEYE)
            to_hit *= 1.5f;

        
return to_hit;
    }

    
long get_agility(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
long agility = character->char_def.agility;

        
if(character->ailments & AILMENT_CLUMSY)
            agility *= 0.75f;

        
if(character->ailments & AILMENT_SUREFOOTED)
            agility *= 1.5f;

        
return agility;
    }

    
long get_attack(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
long attack = character->char_def.attack;

        
// adjust attack based on item value
        if(character->char_def.weapon != -1 && m_mil)
            attack *= (m_mil[character->char_def.weapon].value / 100.0f + 1.0f);

        
if(character->ailments & AILMENT_WEAK)
            attack *= 0.5f;

        
if(character->ailments & AILMENT_STRONG)
            attack *= 1.5f;

        
return attack;
    }
    
    
long get_defense(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
long defense = character->char_def.defense;

        
if(character->char_def.armor != -1 && m_mil)
            defense *= (m_mil[character->char_def.armor].value / 100.0f + 1.0f);

        
if(character->char_def.shield != -1 && m_mil)
            defense *= (m_mil[character->char_def.shield].value / 100.0f + 1.0f);

        
if(character->ailments & AILMENT_WEAK)
            defense *= 0.5f;

        
if(character->ailments & AILMENT_STRONG)
            defense *= 1.5f;

        
if(defense < 0)     // boudns check
            defense = 0;

        
return defense;
    }

    
long get_resistance(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
long resistance = character->char_def.resistance;

        
if(character->ailments & AILMENT_ENCHANTED)
            resistance *= 0.5f;

        
if(character->ailments & AILMENT_BARRIER)
            resistance *= 1.5f;

        
return resistance;
    }

    
long get_mental(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
long mental = character->char_def.mental;

        
if(character->ailments & AILMENT_DUMBFOUNDED)
            mental *= 0.5f;

        
return mental;
    }

    
float get_speed(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0.0f;

        
float speed = character->char_def.speed;

        
if(character->ailments & AILMENT_SLOW)
            speed *= 0.5f;

        
if(character->ailments & AILMENT_FAST)
            speed *= 1.5f;

        
if(speed < 1.0f)    // bounds check
            speed = 1.0f;

        
return speed;
    }

    
float get_charge_rate(const sCharacter* character)
    {
        
if(character == NULL)
            
return 0;

        
float charge_rate = character->char_def.charge_rate;

        
if(character->ailments & AILMENT_SLOW)
            charge_rate *= 0.75f;

        
if(character->ailments & AILMENT_FAST)
            charge_rate *= 1.5f;

        
return charge_rate;
    }

posted on 2007-12-04 19:05 lovedday 阅读(240) 评论(0)  编辑 收藏 引用


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