|
|
原始地址：http://www.52mud.com/show.aspx?&id=1402&cid=13
combatd中skill_power的溢出及解决办法
| [日期：2010-05-01] | 来源： 作者：52mudWIZ |
1.在LPC中int的最大值为2^31=2147483648
2. 现在的公式中level的上限为3000, 那么根据公式计算的最大值为：
a. 技能等级：3000*3000/25*3000/6=180000000
b. 精神影响：180000000*100/100*120=21600000000
3. 步骤2的值大于int的最大值，造成有时高位为1，溢出。
4. 所以允许的最大level为：2147483648/120*(25*6)=x^3
x = 1389.
以上步骤得出最高level只能为1389，但是如此低的level当各位高手的
级别上去后应该很容易达到，最后就造成以后大家都一样啦。
为了让高手们显得cool一点，我觉得应该再增加一个skill_power_level的
方法，这个方法就是返回该高手的level是1300的多少倍，根据不同倍数显
示不同的颜色（在skillpt里），在战斗中，如果两人的级别有差别时，那么
击中/躲避的几率为：
Random( 100-(10－level_trap) ) //level_trap为级别差
这样可以保证高级别的能有效的击中/躲避对手。
方法
#define APPLY_ATTACK_LIMIT 400
#define FIGHT_ATTACK_LIMIT 200
#define APPLY_DODGE_LIMIT 30
#define FIGHT_DODGE_LIMIT 200
#define APPLY_PARRY_LIMIT 30
#define FIGHT_PARRY_LIMIT 200
#define APPLY_DEFENSE_LIMIT 200
varargs int skill_power(object ob, string skill, int usage)
{
int status, level, power, a_d_ratio,a_d_ratio_set, gin_ratio,sen_ratio;
int eff_level,afford,tmp;
string map_skill;
if( !living(ob) )
return 0;
a_d_ratio = 0;
a_d_ratio_set = 0;
if( objectp(ob) )
{
if( intp(ob->query("env/attack")) )
a_d_ratio = (int)ob->query("env/attack");
else
a_d_ratio = 50;
}
if( a_d_ratio == 0)
a_d_ratio = 50;
else if( a_d_ratio > 100)
a_d_ratio = 100;
else if( a_d_ratio < 0)
a_d_ratio = 1;
if( a_d_ratio != a_d_ratio_set )
ob->set("env/attack",a_d_ratio);
// if enable parry as weapon but no weapon then set no_parry skill
if( skill == "no_parry")
level = ob->query_skill("parry",1)/2;
else
level = ob->query_skill(skill);
switch(usage) {
case SKILL_USAGE_ATTACK:
tmp=ob->query_temp("apply/attack");
if(tmp>APPLY_ATTACK_LIMIT) tmp=APPLY_ATTACK_LIMIT;
level += tmp;
// for action["attack"] cmy
// CHANNEL_D->do_channel(ob,"sys",sprintf("origin:%d,add %d " , level,ob->query_temp("fighting/attack")));
tmp=ob->query_temp("fighting/attack");
if(tmp>FIGHT_ATTACK_LIMIT) tmp=FIGHT_ATTACK_LIMIT;
level = level * (100 + tmp) / 100;
// CHANNEL_D->do_channel(ob,"sys",skill+ sprintf(" after:%d " , level));
break;
case SKILL_USAGE_DEFENSE:
tmp=ob->query_temp("apply/defense");
if(tmp>APPLY_DEFENSE_LIMIT) tmp=APPLY_DEFENSE_LIMIT;
level += tmp;
// for action["dodge"] cmy
if (ob->is_fighting()) {
// CHANNEL_D->do_channel(ob,"sys",sprintf("%s origin:%d,add %d ", skill,level,ob->query_temp("fighting/"+skill)));
if( skill == "dodge") {
tmp = ob->query_temp("apply/dodge");
if( tmp > APPLY_DODGE_LIMIT ) tmp = APPLY_DODGE_LIMIT;
level += tmp;
if( stringp(map_skill= (ob->query_skill_mapped(skill))) && ( eff_level = SKILL_D(map_skill)->effective_level()) > 0)
level = level * eff_level / 10;
// CHANNEL_D->do_channel(ob,"sys", sprintf(" dodge eff_level:%d " , eff_level));
tmp=ob->query_temp("fighting/dodge");
if(tmp>FIGHT_DODGE_LIMIT) tmp=FIGHT_DODGE_LIMIT;
level = level * (100 + tmp) / 100;
}
else /*if( skill == "parry")*/
{
tmp = ob->query_temp("apply/parry");
if( tmp > APPLY_PARRY_LIMIT) tmp = APPLY_PARRY_LIMIT;
level += tmp;
if( stringp(map_skill= (ob->query_skill_mapped(skill))) && ( eff_level = SKILL_D(map_skill)->effective_level()) > 0)
level = level * eff_level / 10;
tmp=ob->query_temp("fighting/parry");
if(tmp>FIGHT_PARRY_LIMIT) tmp=FIGHT_PARRY_LIMIT;
level = level * (100 + tmp) / 100;
}
// CHANNEL_D->do_channel(ob,"sys",skill+ sprintf(" after:%d " , level));
}
break;
}
if( !level ) return (int)ob->query("combat_exp") / 2;
/********************changed by meteoric*******************/
if(level>3000) level=3000; //防止溢出
power = (level*level/25)*(level/6);
//if set attack 100,then ap*=2 and dp = 0
//if set attack 0,then ap = 0 and dp*=2
power = power + ob->query("combat_exp")/25;
/***************************end**************************/
gin_ratio = 100;
sen_ratio = 100;
//神影响攻击，精影响防御
if( (status = ob->query("max_sen")) > 0 && power > 1000 ) sen_ratio = 100 * ob->query("sen") / status;
if( (status = ob->query("max_gin")) > 0 && power > 1000 ) gin_ratio = 100 * ob->query("gin") / status;
if(gin_ratio < 50 ) gin_ratio = 50;
if(sen_ratio < 50 ) sen_ratio = 50;
//允许部分超常发挥的情况
if(gin_ratio > 120 ) gin_ratio = 120;
if(sen_ratio > 120 ) sen_ratio = 120;
if( usage == SKILL_USAGE_ATTACK) power = power*a_d_ratio/100*sen_ratio;
else if( usage == SKILL_USAGE_DEFENSE) power = power*(100-a_d_ratio)/100*gin_ratio;
afford = (int)ob->query_encumbrance() * 100 / (int)ob->query_max_encumbrance();
//负重(>10%)影响攻击与躲闪
if( afford > 10 && (skill == "dodge" || usage == SKILL_USAGE_ATTACK) ) power -= power/100*afford;
if( power < 100 ) power = 100;
return power;
}
1. 将一下代码替换combatd.c里的varargs int skill_power(object ob, string skill, int usage)方法：
varargs int skill_level(object ob, string skill, int usage)
{
int level, tmp;
if( !living(ob) )
return 0;
// if enable parry as weapon but no weapon then set no_parry skill
if( skill == "no_parry")
level = ob->query_skill("parry",1)/2;
else
level = ob->query_skill(skill);
switch(usage) {
case SKILL_USAGE_ATTACK:
tmp=ob->query_temp("apply/attack");
if(tmp>APPLY_ATTACK_LIMIT) tmp=APPLY_ATTACK_LIMIT;
level += tmp;
// for action["attack"] cmy
// CHANNEL_D->do_channel(ob,"sys",sprintf("origin:%d,add %d " , level,ob->query_temp("fighting/attack")));
tmp=ob->query_temp("fighting/attack");
if(tmp>FIGHT_ATTACK_LIMIT) tmp=FIGHT_ATTACK_LIMIT;
level = level * (100 + tmp) / 100;
// CHANNEL_D->do_channel(ob,"sys",skill+ sprintf(" after:%d " , level));
break;
case SKILL_USAGE_DEFENSE:
tmp=ob->query_temp("apply/defense");
if(tmp>APPLY_DEFENSE_LIMIT) tmp=APPLY_DEFENSE_LIMIT;
level += tmp;
// for action["dodge"] cmy
if (ob->is_fighting()) {
// CHANNEL_D->do_channel(ob,"sys",sprintf("%s origin:%d,add %d ", skill,level,ob->query_temp("fighting/"+skill)));
if( skill == "dodge") {
tmp = ob->query_temp("apply/dodge");
if( tmp > APPLY_DODGE_LIMIT ) tmp = APPLY_DODGE_LIMIT;
level += tmp;
if( stringp(map_skill= (ob->query_skill_mapped(skill))) && ( eff_level = SKILL_D(map_skill)->effective_level()) > 0)
level = level * eff_level / 10;
// CHANNEL_D->do_channel(ob,"sys", sprintf(" dodge eff_level:%d " , eff_level));
tmp=ob->query_temp("fighting/dodge");
if(tmp>FIGHT_DODGE_LIMIT) tmp=FIGHT_DODGE_LIMIT;
level = level * (100 + tmp) / 100;
}
else /*if( skill == "parry")*/
{
tmp = ob->query_temp("apply/parry");
if( tmp > APPLY_PARRY_LIMIT) tmp = APPLY_PARRY_LIMIT;
level += tmp;
if( stringp(map_skill= (ob->query_skill_mapped(skill))) && ( eff_level = SKILL_D(map_skill)->effective_level()) > 0)
level = level * eff_level / 10;
tmp=ob->query_temp("fighting/parry");
if(tmp>FIGHT_PARRY_LIMIT) tmp=FIGHT_PARRY_LIMIT;
level = level * (100 + tmp) / 100;
}
// CHANNEL_D->do_channel(ob,"sys",skill+ sprintf(" after:%d " , level));
}
break;
}
return level;
}
varargs int skill_power(object ob, string skill, int usage)
{
int status, level, power, a_d_ratio,a_d_ratio_set, gin_ratio,sen_ratio;
int eff_level,afford,tmp;
string map_skill;
if( !living(ob) )
return 0;
//level
level = skill_level(ob, skill, usage);
if( !level ) return (int)ob->query("combat_exp") / 2;
if(level>1500) level=1500; //防止溢出
power = (level*level/25)*(level/25);
tmp = ob->query("combat_exp");
if( tmp < 0 )
tmp = 1;
if( tmp > 10000000 )
tmp = 10000000;
power = power + tmp/100;
//神影响攻击，精影响防御
gin_ratio = 100;
sen_ratio = 100;
if( (status = ob->query("max_sen")) > 0 && power > 1000 ) sen_ratio = 100 * ob->query("sen") / status;
if( (status = ob->query("max_gin")) > 0 && power > 1000 ) gin_ratio = 100 * ob->query("gin") / status;
if(gin_ratio < 50 ) gin_ratio = 50;
if(sen_ratio < 50 ) sen_ratio = 50;
if(gin_ratio > 120 ) gin_ratio = 120; //允许部分超常发挥的情况
if(sen_ratio > 120 ) sen_ratio = 120;
//set attack
a_d_ratio = 0;
a_d_ratio_set = 0;
if( objectp(ob) )
{
if( intp(ob->query("env/attack")) )
a_d_ratio = (int)ob->query("env/attack");
else
a_d_ratio = 50;
}
if( a_d_ratio == 0)
a_d_ratio = 50;
else if( a_d_ratio > 100)
a_d_ratio = 100;
else if( a_d_ratio < 0)
a_d_ratio = 1;
if( a_d_ratio != a_d_ratio_set ) //yisheng: only set again when set value is invalid
ob->set("env/attack",a_d_ratio);
if( usage == SKILL_USAGE_ATTACK) power = power*a_d_ratio/100*sen_ratio/25; //yisheng: 1/4
else if( usage == SKILL_USAGE_DEFENSE) power = power*(100-a_d_ratio)/100*gin_ratio/25; //yisheng: 1/4
//负重(>10%)影响攻击与躲闪
afford = (int)ob->query_encumbrance() * 100 / (int)ob->query_max_encumbrance();
if( afford > 10 && afford <= 100 && (skill == "dodge" || usage == SKILL_USAGE_ATTACK) ) power -= power/100*afford;
if( power < 100 ) power = 100;
return power;
}
varargs int skill_candodgeorparray(object ob, object victim, string attack_skill, string defense_skill)
{
int level_ob, level_victim, n_ob, n_victim, ntrap;
level_ob = skill_power(ob, attack_skill, SKILL_USAGE_ATTACK);
level_victim = skill_power(victim, defense_skill, SKILL_USAGE_DEFENSE);
n_ob = level_ob/1500;
n_victim = level_victim/1500;
if( n_ob == n_victim )
{
return 0; //如果等级相同，让随机数来决定吧
}
else
{
ntrap = n_ob - n_victim;
if( ntrap > 0 )
{
ntrap = 10 - ntrap;
if( ntrap < 1 )
ntrap = 1;
return skill_random(ntrap); //如果攻击方的等级是防守方的n倍，那么防守方能躲避的几率就很小很小
}
else
{
ntrap = 90 + ntrap;
if( ntrap > 99 )
ntrap = 99;
return skill_random(ntrap); //如果防守方的等级是攻击方的n倍，那么防守方能躲避的几率就很大很大
}
}
}
int skill_random(int range)
{
//如果返回1，表示在范围内，否则返回0
if(random(100)< range )
return 1;
}
varargs int skill_candodge(object ob, object victim, string attack_skill)
{
return skill_candodgeorparray(ob, victim, "dodge");
}
varargs int skill_canparry(object ob, object victim, string attack_skill)
{
return skill_candodgeorparray(ob, victim, "parry");
}
2. 修改do_attack()方法里的判断是否dodge和是否parray的两句话为如下（Does the victim dodge this hit?和Does the victim dodge this hit?两句）：
if( (me != victim) && ( skill_candodge(ob, victim, attack_skill) > 0 || (random(ap+dp)
if( (victim != me) && ( skill_canparry(ob, victim, attack_skill) > 0 || (random(ap+pp)
这两句话的修改是通过skill_candodge和skill_canparry来判断攻击方和防守方的level是不是有差别，如果有差别，那么取random(100-差别)的几率能躲过去，返回值为1，无差别的时候，那么返回值为0，继续做random(ap+dp) |
|
狗仔卡
发表于 2010-5-10 22:02:34
提升卡
沉默卡
变色卡
显身卡