function Player.addSkillLevel(self, skillId, value)
local currentSkillLevel = self:getSkillLevel(skillId)
local sum = 0
if value > 0 then
while value > 0 do
sum = sum + self:getVocation():getRequiredSkillTries(skillId, currentSkillLevel + value)
value = value - 1
end
return self:addSkillTries(skillId, sum - self:getSkillTries(skillId))
else
value = math.min(currentSkillLevel, math.abs(value))
while value > 0 do
sum = sum + self:getVocation():getRequiredSkillTries(skillId, currentSkillLevel - value + 1)
value = value - 1
end
return self:removeSkillTries(skillId, sum + self:getSkillTries(skillId), true)
end
end