Radar Altitude for CowanSim B206

[ColinL]

Hi everyone,

I'm trying to recreate a faithful panel for the X-Plane CowansSim 206B3, most of the instruments work fine with it so far, but the Radar Altitude wasn't registering the Heading Bug.
I'm totally new to the coding side and after watching the tuition videos I managed to fix that aspect. (big win for me )

However, I'm also trying to replicate the "Test" button function. I can make the needle swing to match the sim but it leaves the DH light lit and I do not know how to turn it back off.

I'm fudging my way through so far whilst I'm still learning, but would love to get it nutted out.
I've made a backlit OHP for the 206 already and have managed to make that work, the MIP is my task now!

Can anyone help??
I will submit it back into the community if I can make it work!

Below is the current code!

Thanks in advance for any help offered!

Code: Select all

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local display_dial = false -- Set this variable to false if you d'ont want the dial displayed

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-- Load and display text and images
img_add_fullscreen("radaraltimeter3.png")
img_needle = img_add_fullscreen("radarneedle3.png")
img_bug = img_add_fullscreen("radarbug1.png")

img_add_fullscreen("radaraltcover3.png")
img_add_fullscreen("radaraltbezel2.png")
img_add_fullscreen("radaraltjoncblanc2.png")
DH_on=img_add_fullscreen("DH_on3.png")

visible(DH_on, false)
-- Callback functions (handles data received from X-plane)
sound_id = sound_add("DH_Tone.wav") 	--Loads a new sound 	AM 1.0 and up
DH_set=false
-- visible(img_flag, DH_set)
local first_time = false 
local current_alt = 0
local current_dh = 0

--sound_play(sound_id) 
function alt_to_degrees(altitude)
  if altitude <= 500 then
    degrees = altitude * (160 / 500)
  elseif altitude > 500 then
    degrees = 160 + ((altitude - 500) * (77 / 2000))
  end
  
  return degrees
end

 
function new_radioaltitude(radioaltitude)

    radioaltitude = var_cap(radioaltitude, 10,3000)
    current_alt=radioaltitude
    degrees = alt_to_degrees(radioaltitude)

    rotate(img_needle, degrees)
  
    if (current_alt<current_dh) then
        if first_time==true then 
            sound_play(sound_id)
            first_time=false
		end
        DH_set=true
	else
        first_time=true
        DH_set=false
	end

	visible(DH_on,DH_set)
end

function new_radiobug(radiobug)
    radiobug = var_cap(radiobug,0,2500)
    current_dh=radiobug  
    degrees_bug = alt_to_degrees(radiobug)
    rotate(img_bug, degrees_bug)
end

function new_powerflag(powerflag)

	if powerflag == 1 then
		visible(img_flag, false)
	else
		visible(img_flag, true)
	end

end

function new_dh(direction)

	if direction == -1 then
		xpl_command("sim/instruments/dh_ref_down")
		fsx_event("DECREASE_DECISION_HEIGHT")
		fs2020_event("DECREASE_DECISION_HEIGHT")
	elseif direction == 1 then
		xpl_command("sim/instruments/dh_ref_up")
		fsx_event("INCREASE_DECISION_HEIGHT")
		fs2020_event("INCREASE_DECISION_HEIGHT")
	end


end


-- DIALS ADD --
if display_dial then
	img_add("dhknobshadow.png", 4,388, 85, 85)
	dial_alt = dial_add("dhknob.png", 4, 388, 85, 85, new_dh)
	dial_click_rotate(dial_alt,10)
end  
-- subscribe functions on the Aircraft
xpl_dataref_subscribe("206B3/dh_needle","FLOAT", new_radioaltitude)
xpl_dataref_subscribe("sim/cockpit2/gauges/indicators/radio_altimeter_height_ft_pilot","FLOAT",
                      "sim/cockpit2/gauges/indicators/radio_altimeter_dh_lit_pilot","FLOAT", new_radioaltitude)
xpl_dataref_subscribe("sim/cockpit2/gauges/actuators/radio_altimeter_bug_ft_pilot","FLOAT", new_radiobug)


                      
                      
                      
fsx_variable_subscribe("RADIO HEIGHT", "FEET", new_radioaltitude)
fsx_variable_subscribe("DECISION HEIGHT", "FEET", new_radiobug)
fs2020_variable_subscribe("RADIO HEIGHT", "FEET", new_radioaltitude)
fs2020_variable_subscribe("DECISION HEIGHT", "FEET", new_radiobug)