Game mechanics...

Posts : 26 Join date : 2010-02-23

So, Punchingbag and I started playing around trying to figure some hard math on resist and immunity.

As it turns out, immunity is one hard sucker to track down, it seems as though we nailed Resist down though.

LL, would you be able to do some digging in the code for us for a formula as to how resistance and immunity both work? And in what order they're applied - ei a resistance check is made, then immunity reduces the spell power, or vice versa?

Any and all help would be greatly appreciated Very Happy

Subject: Re: Game mechanics... Thu Mar 01, 2012 5:51 pm

Power-(Imm/2)+race bonus

Posts : 26 Join date : 2010-02-23

Sweet thanks. Have any other formulas you wouldn't mind sharing? Very Happy

-edit-

Do you know the resistance formulas?

Subject: Re: Game mechanics... Thu Mar 01, 2012 9:00 pm

I need to decipher from a conversation from ratheart a while back

Posts : 26 Join date : 2010-02-23

So after some digging in the old v2 source I found the curse and stun code... But I can't quite pin it down.

Anyone competent in C able to help out?

Stun code

Code:: int spell_stun(int cn,int co,int power)
{
int in;

if (ch[co].flags&CF_IMMORTAL) return 0;

in=god_create_item(1);
if (!in) { xlog("god_create_item failed in skill_stun"); return 0; }

power=spell_immunity(power,ch[co].skill[SK_IMMUN][5]);

power=spell_race_mod(power,ch[cn].kindred);
strcpy(it[in].name,"Stun");
it[in].flags|=IF_SPELL;
it[in].sprite[1]=91;
it[in].duration=it[in].active=power+TICKS;
it[in].temp=SK_STUN;
it[in].power=power;

if (ch[co].skill[SK_SENSE][5]+10>power)
do_char_log(co,1,"%s cast stun on you.\n",ch[cn].reference);
else do_char_log(co,0,"You have been stunned.\n");
do_char_log(cn,1,"%s was stunned.\n",ch[co].reference);
if (!IS_IGNORING_SPELLS(co)) do_notify_char(co,NT_GOTHIT,cn,0,0,0);
do_notify_char(cn,NT_DIDHIT,co,0,0,0);
char_play_sound(co,ch[cn].sound+7,-150,0);
char_play_sound(cn,ch[cn].sound+1,-150,0);
chlog(cn,"Cast Stun on %s",ch[co].name);
if (!add_spell(co,in)) {
do_char_log(cn,1,"Magical interference neutralised the %s's effect.\n",it[in].name);
return 0;
}

fx_add_effect(5,0,ch[co].x,ch[co].y,0);

return 1;
}

void skill_stun(int cn)
{
int co,m,co_orig;

if ((co=ch[cn].skill_target1)) ;
else if (ch[cn].attack_cn!=0) co=ch[cn].attack_cn;
else co=cn;

if (cn==co) { do_char_log(cn,0,"You cannot stun yourself!\n"); return; }

if (!do_char_can_see(cn,co)) {
do_char_log(cn,0,"You cannot see your target.\n");
return;
}

/* CS, 000209: Remember PvP attacks */
remember_pvp(cn,co);
if (is_exhausted(cn)) return;

if (!may_attack_msg(cn,co,1)) {
chlog(cn,"Prevented from attacking %s (%d)",ch[co].name,co);
return;
}

if (spellcost(cn,20)) return;

if (chance_base(cn,ch[cn].skill[SK_STUN][5],12,ch[co].skill[SK_RESIST][5])) {
if (cn!=co && ch[co].skill[SK_SENSE][5]>ch[cn].skill[SK_STUN][5]+5) {
do_char_log(co,1,"%s tried to cast stun on you but failed.\n",ch[cn].reference);
if (!IS_IGNORING_SPELLS(co)) do_notify_char(co,NT_GOTMISS,cn,0,0,0);
}
return;
}

if (ch[co].flags&CF_IMMORTAL) {
do_char_log(cn,0,"You lost your focus.\n");
return;
}
spell_stun(cn,co,ch[cn].skill[SK_STUN][5]);

co_orig=co;

m=ch[cn].x+ch[cn].y*MAPX;
if ((co=map[m+1].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_STUN][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_stun(cn,co,ch[cn].skill[SK_STUN][5]);
}
if ((co=map[m-1].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_STUN][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_stun(cn,co,ch[cn].skill[SK_STUN][5]);
}
if ((co=map[m+MAPX].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_STUN][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_stun(cn,co,ch[cn].skill[SK_STUN][5]);
}
if ((co=map[m-MAPX].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_STUN][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_stun(cn,co,ch[cn].skill[SK_STUN][5]);
}

fx_add_effect(7,0,ch[cn].x,ch[cn].y,0);

add_exhaust(cn,TICKS*3);

// ch[cn].errno=ERR_SUCCESS;

And curse

Code:: int spell_curse(int cn,int co,int power)
{
int in,n;

if (ch[co].flags&CF_IMMORTAL) return 0;

in=god_create_item(1);
if (!in) { xlog("god_create_item failed in spell_curse"); return 0; }

power=spell_immunity(power,ch[co].skill[SK_IMMUN][5]);

power=spell_race_mod(power,ch[cn].kindred);
strcpy(it[in].name,"Curse");
it[in].flags|=IF_SPELL;
for (n=0; n<5; n++)
it[in].attrib[n][1]=-(power/3); //(power/3+10);
it[in].sprite[1]=89;
it[in].duration=it[in].active=18*60*2;
it[in].temp=SK_CURSE;
it[in].power=power;

if (!add_spell(co,in)) {
do_char_log(cn,1,"Magical interference neutralised the %s's effect.\n",it[in].name);
return 0;
}
if (ch[co].skill[SK_SENSE][5]+10>power)
do_char_log(co,1,"%s cast curse on you.\n",ch[cn].reference);
else
do_char_log(co,0,"You have been cursed.\n");
do_char_log(cn,1,"%s was cursed.\n",ch[co].name);
if (!IS_IGNORING_SPELLS(co)) do_notify_char(co,NT_GOTHIT,cn,0,0,0);
do_notify_char(cn,NT_DIDHIT,co,0,0,0);
char_play_sound(co,ch[cn].sound+7,-150,0);
char_play_sound(cn,ch[cn].sound+1,-150,0);
chlog(cn,"Cast Curse on %s",ch[co].name);
fx_add_effect(5,0,ch[co].x,ch[co].y,0);

return 1;
}

void skill_curse(int cn)
{
int co,co_orig,m;

if ((co=ch[cn].skill_target1)) ;
else if (ch[cn].attack_cn!=0) co=ch[cn].attack_cn;
else co=cn;

if (cn==co) { do_char_log(cn,0,"You cannot curse yourself!\n"); return; }

if (!do_char_can_see(cn,co)) {
do_char_log(cn,0,"You cannot see your target.\n");
return;
}

/* CS, 000209: Remember PvP attacks */
remember_pvp(cn,co);
if (is_exhausted(cn)) return;

if (spellcost(cn,35)) return;

if (!may_attack_msg(cn,co,1)) {
chlog(cn,"Prevented from attacking %s (%d)",ch[co].name,co);
return;
}

if (chance_base(cn,ch[cn].skill[SK_CURSE][5],10,ch[co].skill[SK_RESIST][5])) {
if (cn!=co && ch[co].skill[SK_SENSE][5]>ch[cn].skill[SK_CURSE][5]+5) {
do_char_log(co,0,"%s tried to cast curse on you but failed.\n",ch[cn].reference);
if (!IS_IGNORING_SPELLS(co)) do_notify_char(co,NT_GOTMISS,cn,0,0,0);
}
return;
}

if (ch[co].flags&CF_IMMORTAL) {
do_char_log(cn,0,"You lost your focus.\n");
return;
}

spell_curse(cn,co,ch[cn].skill[SK_CURSE][5]);

co_orig=co;

m=ch[cn].x+ch[cn].y*MAPX;
if ((co=map[m+1].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_CURSE][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_curse(cn,co,ch[cn].skill[SK_CURSE][5]);
}
if ((co=map[m-1].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_CURSE][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_curse(cn,co,ch[cn].skill[SK_CURSE][5]);
}
if ((co=map[m+MAPX].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_CURSE][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_curse(cn,co,ch[cn].skill[SK_CURSE][5]);
}
if ((co=map[m-MAPX].ch)!=0 && ch[co].attack_cn==cn && co_orig!=co) {
if (ch[cn].skill[SK_CURSE][5]+RANDOM(20)>ch[co].skill[SK_RESIST][5]+RANDOM(20)) spell_curse(cn,co,ch[cn].skill[SK_CURSE][5]);
}

fx_add_effect(7,0,ch[cn].x,ch[cn].y,0);

add_exhaust(cn,TICKS*4);

// ch[cn].errno=ERR_SUCCESS;

Thanks again!

Posts : 3 Join date : 2012-02-28

Did one testing once on curse results, confirming what flipper said.

Note: This is cast from a hara with no spell bonus.

Game mechanics... Immunity

So 150 mod curse on you will lower your base attributes by 50, and lowering all your normal skills by 30.

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