1- I will root a node event to the class
2- the script must perform the following computation: (this is my problem)
a = V0^2 + V1^2;
b = V2 + VAR^2;
c = ( 2*v0*v1 );
alpha = acos( ( a - b )/ c ); i want the angle in radiants;
3- the class has to provide the computed alpha parameter
Thx a lot to anyone!