Need help with calculating velocity of a vector

[ace1313]

I've been playing with the idea of having a drone above your head, resulting in this expression:

@name Evil Hyvel

interval(10)
EE=entity(),EA=EE:angVel()
EV=EE:pos(),EU=EE:up()
TV = entity():owner():pos() + vec(0,0,150) + entity():owner():vel()/8
TL = entity():owner():aimPos()

#Forces
applyForce((TV-EV-EE:vel()/10)*entity():mass()) #Above head
applyOffsetForce((TL-TV)/1000, EV+EU) #Aim, needs some sort of delta
applyOffsetForce(-(TL-TV)/1000, EV-EU)} #Aim, needs some sort of delta

The problem is that I have no idea to check the velocity of EE:up(), so it wobbles more and more until it's just spinning randomly

[mjmr89]

Not quite sure what you're asking here. There's a function E:velL() that returns the vector of the speed relative to the entity, I think E:velL():z() would give you the up/down velocity of the entity.

[ace1313]

I want to get the velocity of entity():up(), not the Z velocity

[Syranide]

Delta works on vectors.

if(entity():up() != Up) {
    Up = entity():up()
    Velocity = $Up
}

However, know that the vector doesn't become properly interpolated, so you need to normalize it yourself to get somewhat proper readings.

... BUT, I'd say it is far better to use the velocity() (and angular velocity) functions for the entity(), they are more accurate and basically better in every way.