[JASS] Does a custom channeling sound system exist?

[KitsuneTailsPrower]

Hello hive,

I'm wondering if there is an existing system for playing a custom sound when channeling an ability that also stops the sound instantly if the ability is interrupted. The Battle Cruiser's Yamato cannon charge sound in Starcraft 2 is an example of what I mean.

So far I have done a google custom search of hive and a search of the spells section before asking this.

 

[the.Axolotl]

Hi, you don’t really need a full system for this, just a simple start + interrupt check.

--Start the sound when the unit begins channeling
--Periodically check if the channel broke
--Stop the sound immediately when it does

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In GUI terms it’s something like:

On channel start:

• Event: Unit begins channeling ability
• Play sound and attach it to the unit
• Store the unit + sound in variables
• Turn on a short periodic trigger (0.3–0.5)

Interrupt check (loop):

--If any of these happen:

• unit is dead
• unit is stunned/paused
• current order ≠ channel (this can be tricky, make sure order string is channel)
• (optional) channel buff is gone
  → then stop the sound and turn the loop off.

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Edit: Saw the [JASS] tag too late, note that this is not MUI:

globals
    sound ChannelSound = null
    unit ChannelUnit = null
    trigger InterruptTrig = CreateTrigger()
endglobals


function OnChannelStart takes nothing returns nothing
    if GetSpellAbilityId() == 'A000' then
        set ChannelUnit = GetTriggerUnit()
        set ChannelSound = CreateSound("Abilities\\Spells\\Other\\YourSound.wav", false, false, false, 10, 10, "")
        call AttachSoundToUnit(ChannelSound, ChannelUnit)
        call StartSound(ChannelSound)
        call EnableTrigger(InterruptTrig)
    endif
endfunction


function CheckInterrupt takes nothing returns nothing
    if ChannelUnit != null then
        if GetWidgetLife(ChannelUnit) < 0.405 or GetUnitCurrentOrder(ChannelUnit) != 852600 then
            call StopSound(ChannelSound, true, true)
            call DestroySound(ChannelSound)
            set ChannelSound = null
            set ChannelUnit = null
            call DisableTrigger(InterruptTrig)
        endif
    endif
endfunction

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*As I mentioned before:

(Order("channel") = 852600, but depends on ability order string)

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