add2 method
Implementation
Vector4 add2(Vector a, Vector b) {
x = a.x + b.x;
y = a.y + b.y;
if(a is Vector4 && b is Vector4){
z = a.z + b.z;
w = a.w + b.w;
}
else if(a is Vector3 && b is Vector3){
z = a.z + b.z;
}
else if(a is Vector4 && b is Vector3){
z = a.z + b.z;
}
else if(a is Vector3 && b is Vector4){
z = a.z + b.z;
}
return this;
}