DCS Bank Vektor Bug (Euler Angles) solved with post #23488

[asticher]

Hello Folks,

I have still a big problem with the DCS Roll also called Bank Vektors.
I have to adjust the DCS Bank Export Value (Effekt 25) or alternative ac.Bank.
Reason: This DCS vector is a combined body frame vektor, but i need a fixed world frame vektor in order to get a prober 360° Bankangle in my MotionPit.
Elseway the bank vektor is turning upsidedown, when pitch reaches angle 90°.
Therefor i need to convert the bank angle. This is best done in the export.lua from DCS World.
First i read out the Euler angle (XYZ) like this:

ac = LoGetSelfData(lACid)

bank = ac.Bank
pitch = ac.Pank
Yaw = ac.Heading

So we have our three body frame vektors.
No comes the tricky part. I testet a few formulas like this:

roll = (math.cos(ac.Pitch)) * ac.Bank
roll = math.cos(ac.Pitch) * ac.Bank
or
roll = ac.Bank * math.abs(math.cos(ac.Pitch))

But still the Bank angle flips at somehow at Pitch up 90°. I also tried converting radiants with math.deg() .
And also tried out with the original vektors (LoGetADIPitchBankYaw())
No Effekt.

Has someone a clue?

[asticher]

Push! No one an idea how to solve this with lua or c++?

[asticher]

Some Update:

News Folks!
After some notes on the public support forum, ED
has opened a Ticket for this issue:
https://www.digitalcombatsimulator.c...support/60400/

"Hello,
I've filed a bug with our internal bug trucking system, requesting to have the DCS matrix exported along with Euler angles.
Chances are you will get the DCS matrix with one of the upcoming updates.

Lua export script with lua Matrix class sample added in that matrix class mathematics rotation is matched with DCS internal code


local data = LoGetSelfData()

local yaw = 2.0 * math.pi - data.Heading -- because heading returned opposite for navigation use
local pitch = data.Pitch
local roll = data.Bank

local m = Matrix33()

m:RotateY(yaw);
m:RotateZ(pitch);
m:RotateX(roll);
print("-------------------------------------")
print(m.x.x,m.x.y,m.x.z)
print(m.y.x,m.y.y,m.y.z)
print(m.z.x,m.z.y,m.z.z)

Wait for it.
--
Best regards,
Andrey Filin
Eagle Dynamics IT Team"
-------------------------------------


So can someone do something with it?

[Deadman]

Any change to this?

[asticher]

No, new code didn´t change the behavior of the axis values.

[asticher]

Heads UP Pilots!

With this Export.lua for DCS World you can counter this Effekt!
https://drive.google.com/open?id=1Z7dsO ... EkotDJPCys

You can make forward / backward / inverted loops as you like,
For example, you can cancel the climb at 80° PitchUp,
You can even roll a bit at 90° pitch,
You can go up to 4 degrees off the track through the vertical.
If you don´t hit vertical the "normal" Bankflip occours and Pitch will decrease as "normal".
Some rare miss behaviors and small stutters are still a issue, but you know...

Have Fun!

PS: use the value roll_final and pitch_final!