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//! holds hit components and its weights for attack from AI (used on each type - DayZPlayerType, DayZAnimalType, etc.)
class DayZAIHitComponent
{
string m_Name; //! "Head", "Torso", etc.
int m_Weight; //! [0..1]
};
class DayZAIHitComponentHelpers
{
/**
* @fn RegisterHitComponent
* @brief Register Hit Component for AI targeting
*
* Register Hit Component for AI targeting to array defined on entity's Type (DayZPlayerType, DayZInfectedType, etc.)
* Uses component name from damage system (zone) and its weight.
*
* @param[in] pHitComponents \p array that keeps registered compoenents
* @param[in] pName \p component name (zone in Damage System)
* @param[in] pWeight \p weight of the component (probability)
**/
static void RegisterHitComponent(array<ref DayZAIHitComponent> pHitComponents, string pName, float pWeight)
{
DayZAIHitComponent newComponent = new DayZAIHitComponent();
newComponent.m_Name = pName;
newComponent.m_Weight = pWeight;
pHitComponents.Insert(newComponent);
}
/**
* @fn ComputeHitComponentProbability
* @brief Computes hit component probability based on weights
*
* @param[in] pHitComponents \p array that keeps registered compoenents
* @param[out] pHitComponent \p selected component name (can be passed to Damage System)
*
* @return true if found, false otherwise
**/
static bool SelectMostProbableHitComponent(array<ref DayZAIHitComponent> pHitComponents, out string pHitComponent)
{
int weights = SumOfWeights(pHitComponents);
float rnd = Math.RandomInt(0, weights);
for ( int i = 0; i < pHitComponents.Count(); ++i )
{
DayZAIHitComponent hitComp = pHitComponents.Get(i);
rnd -= hitComp.m_Weight;
if (rnd <= 0)
{
pHitComponent = hitComp.m_Name;
return true;
}
}
return false;
}
/**
* @fn SumOfWeights
* @brief Calculates the sum of all entries in DayZAIHitComponent array
*
* @param[in] pHitComponents \p array that keeps registered compoenents
*
* @return Sum of weights of all entries in array
**/
static int SumOfWeights(array<ref DayZAIHitComponent> pHitComponents)
{
int sum = 0;
for( int i = 0; i < pHitComponents.Count(); ++i )
{
DayZAIHitComponent hitComp = pHitComponents.Get(i);
sum += hitComp.m_Weight;
}
return sum;
}
}; |