Vehicle reversing?

[Messiah]

i was wondering if it would be possible to check the direction a vehicle is facing and then check if it was moving in the oposite direction to which it was facing, hence check if it was reversing?

mainly need it for a bit of larger scripting for some things im working on

cheers  

[MachoMan]

yes that would be possible ...  ;D

[RujiK]

Code: [Select]

?(speed VehicleName < 0):hint"Your going backwards!"

[MachoMan]

Ok I'll help out ;D

It's easy if you understand vectors, damn I should have payed more attention at school ;D

Ok to the point:

So we have sin & cos in ofp, we have heading, hey we have 3d Vecs wich give us heading and velocity, thats all we need!

As we all know the dir implementation of ofp is kinda simpel, 0 is North, 180 is south. Now we can combine those values to numbers using sin & cos.
Now im gonna get these things wrong, cause I always do:
(I think u can guess what veh means)

Code: [Select]

A = [sin getDir veh, cos getDir veh, 0]
B = getVelocity veh
//Make sure we can get valid results, since we cannot check vertical heading in ofp:
B = [B select 0, B select 1, 0]
Now we are gonna have to normalize B, to do that see here.

Now check

Code: [Select]

(A == -B) (which doesnt work in ofp, but I wont have to explain that I think.)
Et voila you a bool which tells you if you are reversing.

[Triggerhappy]

...or you could do what rujik said...

 ;D

[Planck]

If speed was 0 then the vehicle is stopped........so maybe:

?(speed VehicleName < 0):hint"Your going backwards!"

would be better.


Planck

[MachoMan]

Nah my way is better  ;D

[macguba]

I imagine a variation would be:-

? (speed VehicleName = i) : hint "You're going sideways..."   ;D

[THobson]

Only in complex space I think ;D

[RujiK]

If speed was 0 then the vehicle is stopped........so maybe:

?(speed VehicleName < 0):hint"Your going backwards!"

would be better.


Planck

Oh, woops.
Ok post edited, thanks for noticing that.

[Fragorl]

Negative speed is one of the most useful concepts in ofp. Makes life so much easier!  ;D

[Messiah]

ok... so negative speed works in ofp? awesome...

i'll try both ideas out and see how they work.

cheers  

[Messiah]

the negative speed one works excellenty... now to try and get it into an addon with an eventhandler.... always fun  

cheers guys