//get difference on dot product
public static Double Hand_Dot_Product(HandKeyData hkd0, HandKeyData hkd1)
{
double answer = 0f;
double tmp_dot;
double fkd0_self_dot;
double fkd1_self_dot;
for (int i = 0; i < 5; i++)
{
//get dot metrix answer of finger on different hands
tmp_dot = hkd0.Finger_[i].TipPosition.Dot(hkd1.Finger_[i].TipPosition);
//fingertip of each hand do self dot metrix, and the answer is square tip-palm distance
/*
* fkd0_self_dot = Self_Dot(hkd0.Finger_[i].TipPosition);
* fkd1_self_dot = Self_Dot(hkd1.Finger_[i].TipPosition);
* //chose the bigger one
* fkd0_self_dot = fkd0_self_dot > fkd1_self_dot ? fkd0_self_dot : fkd1_self_dot;
*/
fkd0_self_dot = hkd0.Finger_[i].TipPosition.DistanceTo(new Vector(0, 0, 0));
fkd1_self_dot = hkd1.Finger_[i].TipPosition.DistanceTo(new Vector(0, 0, 0));
fkd0_self_dot *= fkd1_self_dot;
//get answer of it minus dot metrix.
answer += fkd0_self_dot - tmp_dot;
}
return(answer);
}
public static void Hand_Normalized(ref HandKeyData hkd, float changing_parameters)
{
for (int i = 0; i < 5; i++)
{
Finger_Normalized(ref hkd.Finger_[i], changing_parameters);
}
hkd.PalmPosition *= changing_parameters;
}
public static void Hand_Normalized(ref HandKeyData hkd0, ref HandKeyData hkd1)
{
float changing_parameters;
//get normalize ratio (middle finger ratio)
changing_parameters = hkd0.Finger_[2].Length / hkd1.Finger_[2].Length;
//do size normalize
Hand_Normalized(ref hkd1, changing_parameters);
}
//method of using euclidean metric
public static Double Hand_Euclid(HandKeyData hkd0, HandKeyData hkd1)
{
double answer = 0;
//plus difference of distance of tip-palm of each finger of 2 hands
for (int i = 0; i < 5; i++)
{
answer += Math.Abs(hkd0.PalmPosition.DistanceTo(hkd0.Finger_[i].TipPosition)
- hkd1.PalmPosition.DistanceTo(hkd1.Finger_[i].TipPosition));
}
return(answer);
}
//plus distance of each finger of 2 hands.
public static Double Hand_Compare(HandKeyData hkd0, HandKeyData hkd1)
{
double an = new double();
for (int i = 0; i < 5; i++)
{
an += Finger_Compare(hkd0.Finger_[i], hkd1.Finger_[i]);
}
//plus distance of plam position
an += hkd0.PalmPosition.DistanceTo(hkd1.PalmPosition);
return(an);
}