WT CJ4 Baro Acceleration

[rob2791]

Reminder to Add Acceleration to Baro knob sometime in the future at the request of @sunbeam60.

[sunbeam60]

I still hope to take a look at it when I find the time, but obviously happy if someone else wants to have a go.

Acceleration to baro knob itself is super easy. The challenge is to ensure the dark/light knob overlay PNGs rotate at the same rate, as they are currently set to a fixed value of each tick of the knob-change function (ie if acceleration is set to 3, they will rotate up to 3 times as fast as the knob-PNG.

The challenge is that the underlying knob graphic continues to rotate at a fixed rate even if the rotate-function is called multiple times due to acceleration.

The easiest approach I can see is to have a transparent PNG for the knob itself and include the normal knob graphic alongside the light/dark graphic, rotating them all so they stay in sync.

[rob2791]

Yes, we typically do exactly that. Very rarely do I code a instrument using the image in the knob itself anymore. You have to add a rotate line as well to make sure they stay in sync. Replace lines 165-170 with the following:

     rotate (img_baro_day, baro_angle)     
     rotate (img_baro_night, baro_angle)
     rotate (img_baro_backlight, baro_angle)
end
dial_baro = dial_add(nil, 115,165,120,120, callback_baro_turn)
dial_set_acceleration(dial_baro, 3) 
img_baro_day = img_add("baro.png", 115,165,120,120 )
img_baro_night = img_add("baro_night.png", 115,165,120,120 )
img_baro_backlight = img_add("baro_backlight.png", 115,165,120,120)

[rob2791]

@sunbeam60 Updated release is on Github and pushed to the AirManager "Store". I don't know when they will update everyone's instruments, it's usually once a month or so, but you can import the Siff file from the Github anytime. https://github.com/Simstrumentation/Air-Manager/tree/main/Instruments/Cessena_Citation_CJ4/CJ4-Upper_DCP_Panel

[rob2791]

I will add that Acceleration does not seem to work in STD mode, when you want to preset for landing typically. I'm 90% sure this has to do with STD mode using an Event and User mode using a variable write. I don't think there is any solution too this as of right now. When the new CJ4 version comes out we'll have to see if it's different.

[sunbeam60]

Yup, learnt that the hard way 😄

When in STD, pre-set baro has to be set in-game, unfortunately.

Thank you for making this fix!! Much obliged