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# open change casting speed bonus formula / add cooldown reduction bonus

## Question

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1. Description of the problem / Question :

Does anyone know where I can find the formula for the casting speed bonus? I want to change it(if possible) so it reduces the cooldown of skills by that percentage. Or, if I can't change it, does anyone know how I can add a new bonus that does that?

Thanks, Sincerly,
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char_skill.cpp

```int CHARACTER::ComputeCooltime(int time)
{
return CalculateDuration(GetPoint(POINT_CASTING_SPEED), time);
}```

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49 minutes ago, WeedHex said:

char_skill.cpp

```int CHARACTER::ComputeCooltime(int time)
{
return CalculateDuration(GetPoint(POINT_CASTING_SPEED), time);
}```

I can't seem to find what ComputeCooltime does, only its declaration. Can you please tell me where I can find its definition so I can change it?

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15 minutes ago, semoka10 said:

I can't seem to find what ComputeCooltime does, only its declaration. Can you please tell me where I can find its definition so I can change it?

Utils.cpp

`int CalculateDuration(int iSpd, int iDur)`

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54 minutes ago, WeedHex said:

Utils.cpp

`int CalculateDuration(int iSpd, int iDur)`

I found it

Quote

int CalculateDuration(int iSpd, int iDur)
{
int i = 100 - iSpd;

if (i > 0)
i = 100 + i;
else if (i < 0)
i = 10000 / (100 - i);
else
i = 100;

return iDur * i / 100;

}

edit Realised I shouldn't modify CalculateDuration because it is used for calculating more things, not only the cooldown of skills, so I should instead modify ComputeCooltime

So, in order for it to work like cooldown reduction (as in, you have +60% casting speed, skill cooldown is reduced by 60%), I think I should modify it like this

Quote

int CHARACTER::ComputeCooltime(int time)
{
if(GetPoint(POINT_CASTING_SPEED) - 100 <= 100) // subtracting 100 from casting speed because the base amount is 100(or I think it is), and I only want the leftover from item bonus
return time * (100 - (GetPoint(POINT_CASTING_SPEED) - 100)) / 100;
else
return time; // just in case it somehow got above 100% which shouldn't happen
}

Do you think it is fine? Sorry for spamming questions, but I'm beginner at both metin and coding and I doubt it is this easy to do, and 99% there is something I didn't consider

Edited by semoka10 (see edit history)
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On 6/4/2020 at 1:02 AM, WeedHex said:

Utils.cpp

`int CalculateDuration(int iSpd, int iDur)`

I tried changing the ComputeCooltime function but nothing happens in game, it is the same as before. Any idea why?

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36 minutes ago, semoka10 said:

I tried changing the ComputeCooltime function but nothing happens in game, it is the same as before. Any idea why?

What you need to do? Reduce/remove the POINT_CASTING_SPEED from the skill ComputeCooltime formulation?

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56 minutes ago, WeedHex said:

What you need to do? Reduce/remove the POINT_CASTING_SPEED from the skill ComputeCooltime formulation?

No, I want it to work differently. Now, if you have +100% casting speed, cooldown goes down by 50%, if you have +400% casting speed, cooldown goes down by 80% etc. I want to change it so that if you have +40% casting speed, cooldown is reduced by 40%, or if you have +70% casting speed, cooldown is reduced by 70% (obviously, it should never reach 100%). I changed the formula but no changes happened in game after compiling

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