/// <summary>
/// Measures the equality of two informations
/// </summary>
/// <param name="other">the other information</param>
/// <returns>a value between 0 and 1. if the value is 0, the two items are exactly the same,
/// if the value is bigger than zero the two are not the same, if the value has reached 1, the two are
/// as different as possible</returns>
public float MeasureEquality(BirdInformation other)
{
float value = 1;
if (other.type == this.type)
{
// the type defines which dimensions can be compared
if (type == BirdInformationType.FOOD)
{
// the vector containing the comparable information of this
float[] infoVectorA = new float[]
{
this.age,
this.foodSourceSize,
this.foodSourcePosition.x,
this.foodSourcePosition.y,
this.foodSourcePosition.z
};
// the vector containing the comparable information of other
float[] infoVectorB = new float[]
{
other.age,
other.foodSourceSize,
other.foodSourcePosition.x,
other.foodSourcePosition.y,
other.foodSourcePosition.z
};
int foodProperties = infoVectorA.Length; // the number of comparable food properties
float[] infoVectorDistance = new float[foodProperties];
float sqrMagnitude = 0;
for (int i = 0; i < foodProperties; i++)
{
infoVectorDistance[i] = infoVectorA[i] - infoVectorB[i];
sqrMagnitude += infoVectorDistance[i] * infoVectorDistance[i];
}
value = Mathf.Sqrt(sqrMagnitude);
// to make indifferent to environment circumstances, calculate value in range (0,1)
value = value / maxFoodDifferenceVectorMagnitude;
}
}
return value;
}
/// <summary>
/// Copies the information to a new instance of BirdInformation
/// </summary>
/// <returns>returns a new instance of BirdInformation with the same info</returns>
public BirdInformation Copy()
{
// create instance
BirdInformation newInfo = new BirdInformation();
// copy values
newInfo.hops = this.hops;
newInfo.certainty = this.certainty;
newInfo.firstSeenTimestamp = this.firstSeenTimestamp;
newInfo.gatheredTimestamp = -1; // still needs to be set
newInfo.type = this.type;
newInfo.foodId = this.foodId;
newInfo.foodSourcePosition = this.foodSourcePosition;
newInfo.foodSourceSize = this.foodSourceSize;
if (!foodIdCounts.ContainsKey(foodId))
{
foodIdCounts.Add(foodId, 1);
}
else
{
foodIdCounts[foodId] += 1;
}
return newInfo;
}
