New to LInda & Lua Programming

[Ace9 12]

Hi.

 

New to Lua and programming in general, am I right in assuming that the function name can be anything I choose that is descriptive of its use? also I am trying to figure out why my code below wont work, nothing happens when I programme a switch on my X-55 with it.

 

I used the LInda Tracer to find the Lvar relevant to opening the cockpit side door on the A2A Spitfire, and (after un-pausing FSX-S) the door opens by a command sent from the Linda Tracer "Set Value" Toggle (Shift+Ctrl+Alt+F10).

 

Any help much appreciated.  

 

Linda 2.9.2 (487)
Module: - A2A Spitfire (User)
FSX-Steam
Registered FSUIPC 4.9.6.2
Windows 10 (1607 - Build 14393.693)

 

-- %% Side Door
function SPIT_Side_Door_Open ()

    LVarSet = "CockpitSideDoor"

    ipc.writeLvar(LVarSet, 1)

end

 

function SPIT_Side_Door_Close ()

    LVarSet = "CockpitSideDoor"

    ipc.writeLvar(LVarSet, 0)

end

-- ##  ###############

 

OR put in a simpler way (I think?)

 

-- %% Side Door
function SPIT_Side_Door_Open ()

    ipc.writeLvar(CockpitSideDoor, 1)

end

 

function SPIT_Side_Door_Close ()

     ipc.writeLvar(CockpitSideDoor, 0)

end

-- ##  ###############

 

Many Thanks

Roger

 

 

[ScotFlieger 280]

Hi Roger

A LUA function name can be anything you choose but, like all functions and variables, is case sensitive. There is a convention that the function should start with 3-4 characters referring the aircraft (ie. SPIT_). The suffix should be standardised to _on, _off, _open, _close, _up, _down, _inc, _dec, _toggle and _show. After writing/editing a function, you need to save it and then reload the changes by clicking on 'Reload LUA Engine' on the LINDA GUI Settings page. All changes in assignments to MCP Combo or Joysticks also require you to click 'Reload LUA Engine'.

You have made a good start with your LUA code for the Spitfire pilot's side door. The side door will not open if the canopy is closed. As you have probably discovered there is no Lvar for the canopy. This has to be done by the FSX control 66389 which toggles the exit and you need to check the FSUIPC offset 3367 for the exit position. My rework of your code is:

-- ## Cockpit Canopy and Door #####################################

-- $$ Canopy

function SPIT_Canopy_open ()
    pos = ipc.readUB(0x3367)  -- get exit position
    if pos == 0 then
        ipc.control(66389,0)  -- toggle exit/canopy
        ipc.sleep(4000)
    end
    SPIT_Canopy_show()
end

function SPIT_Canopy_close ()
    LVarSet = 'CockpitSideDoor'
    pos = ipc.readUB(0x3367)
    if pos == 1 and ipc.readLvar(LVarSet) == 0 then
        ipc.control(66389,0)
        ipc.sleep(4000)
    end
    SPIT_Canopy_show()
end

function SPIT_Canopy_toggle ()
    LVarSet = 'CockpitSideDoor'
    pos = ipc.readUB(0x3367)
    if ipc.readLvar(LVarSet) == 0 then
        if pos == 1 then
            SPIT_Canopy_close ()
        else
            SPIT_Canopy_open ()
        end
    else
        SPIT_Canopy_show()
    end
end

function SPIT_Canopy_closeAll ()
    SPIT_Door_close ()
    SPIT_Canopy_close ()
end

function SPIT_Canopy_show ()
    pos = ipc.readUB(0x3367)
    if pos == 0 then
        val = 'shut'
    else
        val = 'open'
    end
    if _MCP1() then
        DspShow("Cnpy", val)
    elseif _MCP2() or _MCP2a() then
        DspMed1("Canopy")
        DspMed2(val)
    end
end

-- $$ Cockpit Side Door

function SPIT_Door_open ()
    LVarSet = 'CockpitSideDoor'
    val = ipc.readLvar(LVarSet)
    if val == 0 then
        ipc.writeLvar(LVarSet, 1)
        ipc.sleep(3000)
    end
    SPIT_Door_show()
end

function SPIT_Door_close ()
    LVarSet = 'CockpitSideDoor'
    val = ipc.readLvar(LVarSet)
    if val == 1 then
        ipc.writeLvar(LVarSet, 0)
        ipc.sleep(3000)
    end
    SPIT_Door_show ()
end

function SPIT_Door_toggle ()
    LVarSet = 'CockpitSideDoor'
    if ipc.readLvar(LVarSet) == 0 then
        SPIT_Door_open ()
    else
        SPIT_Door_close ()
    end
end

function SPIT_Door_show ()
    LVarSet = 'CockpitSideDoor'
    if ipc.readLvar(LVarSet) == 0 then
        val = "clos"
    else
        val = "open"
    end
    if _MCP1() then
        DspShow("Door", val)
    elseif _MCP2() or _MCP2a() then
        DspMed1("Door")
        DspMed2(val)
    end
end

This will be included in the updated A2A Spitfire module.

 

[Ace9 12]

Hi Scotflieger.

Many thanks, now I can see exactly what's going on, re the convention and IPC offsets etc, many thanks for getting back with this, you have helped me understand a great deal in a short space of time, my Spitfire will never be the same old same old again, Ive got Lua and also developing imagination!

ATB

Rog