How to measure the time of arrival of a projectile

[ToldYouSo]

Hello, I'm using BPower's missile system, and I have an ability to throw snowball from a hero point to target point.

call TriggerExecute( gg_trg_Missile_Configurate )
        set udg_Missile__Owner = GetOwningPlayer(c)
    set udg_Missile__Origin = GetUnitLoc(c)
    set udg_Missile__OriginZ = 70
    set udg_Missile__Impact = Location(x,y) //Get Spell target x and y 
    set udg_Missile__ImpactZ = 40.00

    set udg_Missile__Speed = 600 
    if LVL == 1 then
    set udg_Missile__Scale = 1.25
    elseif LVL == 2 then 
    set udg_Missile__Scale = 1.45
    else
    set udg_Missile__Scale = 1.65
    endif

        set udg_Missile__Arc = 55
    set udg_Missile__Collision = 108.00
    set udg_Missile__Height = 800
    set udg_Missile__Damage = mp //its damage actually
    

    set udg_Missile__Model = "war3mapImported\\FrostOrb.mdx"
    udg_Missile__OnRemove= gg_trg_LichFrostNova
        set udg_Missile__Data = GetPlayerId(GetOwningPlayer(c))

Since it's not a homing projectile, I believe there's a way to measure a time projectile takes to reach the target point. I want to give special effect to target x y right before missile actually reaches the target point.

 

[Pyrogasm]

d = vt, so t = <distance to target>/<missile speed>.

d = sqrt((y-launchY) x (y-launchY) + (x-launchX) x (x-launchX))
v = 600 or some function of missile speed (600) and arc (55), but I suspect it's a constant ground speed in the system.

 

[ToldYouSo]

d = vt, so t = <distance to target>/<missile speed>.

d = sqrt((y-launchY) x (y-launchY) + (x-launchX) x (x-launchX))
v = 600 or some function of missile speed (600) and arc (55), but I suspect it's a constant ground speed in the system.

My man, thx you. Wish I was studying math properly.
Can I able to edit that formula, so I could predict when missile lands 2 seconds earlier? So they could see warning effect at the target point.

 

[Uncle]

My man, thx you. Wish I was studying math properly.
Can I able to edit that formula, so I could predict when missile lands 2 seconds earlier? So they could see warning effect at the target point.

Once you've determined your time variable, subtract 2 from it, and use that as the duration of a timer. Once said timer expires you can create your special effect.

Just make sure that the value isn't negative. Starting a timer with a negative value will crash the game afaik.

• -------- Do some math to calculate Time --------
• Set Variable DelayBeforeEffect = (Time - 2.00)
• If DelayBeforeEffect is Less than 0.00 then Set Variable DelayBeforeEffect = 0.00
• Countdown Timer - Start EffectTimer as a One-shot timer that will expire after DelayBeforeEffect seconds

 

[ToldYouSo]

Once you've determined your time variable, subtract 2 from it, and use that as the duration of a timer. Once said timer expires you can create your special effect.

Just make sure that the value isn't negative. Starting a timer with a negative value will crash the game afaik.

• -------- Do some math to calculate Time --------
• Set Variable DelayBeforeEffect = (Time - 2.00)
• If DelayBeforeEffect is Less than 0.00 then Set Variable DelayBeforeEffect = 0.00
• Countdown Timer - Start EffectTimer as a One-shot timer that will expire after DelayBeforeEffect seconds

Thx you. You prevented my map from sudden crahes. Never thought about running timer with negative values consequences.

SOLVED.

 

[ToldYouSo]

Once you've determined your time variable, subtract 2 from it, and use that as the duration of a timer. Once said timer expires you can create your special effect.

Just make sure that the value isn't negative. Starting a timer with a negative value will crash the game afaik.

• -------- Do some math to calculate Time --------
• Set Variable DelayBeforeEffect = (Time - 2.00)
• If DelayBeforeEffect is Less than 0.00 then Set Variable DelayBeforeEffect = 0.00
• Countdown Timer - Start EffectTimer as a One-shot timer that will expire after DelayBeforeEffect seconds

Uncle, my next question is pretty simple so I dont wanna overspam question section

What's the point of function SetTextTagPermanent? F.e if you do not set lifespam for textag, would not it remain permament anyway? And what will happen if you give lifespam for textag and set permament as false for it?

 

[Uncle]

Uncle, my next question is pretty simple so I dont wanna overspam question section

What's the point of function SetTextTagPermanent? F.e if you do not set lifespam for textag, would not it remain permament anyway? And what will happen if you give lifespam for textag and set permament as false for it?

They're permanent by default which prevents Lifespan from destroying them.

If you disable the permanence then the Text Tag will be destroyed after it's Lifespan expires.

I suppose there could be some situations where it's useful. Like you periodically apply Lifespans to an ever changing Array of Text Tags, and control which ones get destroyed by toggling their permanence. But it does seem a bit odd to me, if you give a Text Tag a Lifespan then clearly you want it destroyed, so why add an extra step?

 

[ToldYouSo]

They're permanent by default which prevents Lifespan from destroying them.

If you disable the permanence then the Text Tag will be destroyed after it's Lifespan expires.

I suppose there could be some situations where it's useful. Like you periodically apply Lifespans to an ever changing Array of Text Tags, and control which ones get destroyed by toggling their permanence. But it does seem a bit odd to me, if you give a Text Tag a Lifespan then clearly you want it destroyed, so why add an extra step?

Uncle please help me more

The problem that my "constant" textag are not showing through the fog of war.

set tx = CreateTextTag() //local texttag tx
call SetTextTagColor(tx, 255, 225, 200, 250) //250
            call SetTextTagTexBtJ(tx, "bla bla bla ", 12) //0.014
            call SetTextTagPos(tx, -680, 3857, 0)
// call SetTextTagPermanent(tx, FALSE)
set tx = CreateTextTag() //local texttag tx
call SetTextTagColor(tx, 255, 225, 200, 250) //250
            call SetTextTagTexBtJ(tx, "bla bla bla2 ", 12) //0.014
            call SetTextTagPos(tx, -980, 4857, 0)
// call SetTextTagPermanent(tx, FALSE)