[Trigger] Gyro's Missile acceleration?

[Steel0RaZoR]

Gello!

I just want to ask how gyrocopter's(Dota Hero) missile increases speed gradually over time/range. Does anyone know how to do an acceleration system?

 

[Spartipilo]

You have
Speed
Acceleration

Speed is 0 for 3 seconds. Acceleration is 0 for 3 seconds.

Then speed goes to about 300/second + Acceleration, which is 0.
So: Set Point1 = position of Missile and Point2 = Point1 Offset by Speed towards Target

Then, you increase acceleration by 5. and again set Speed = Speed+Acceleration. and Set Point1 = position of Missile and Point2 = Point1 Offset by Speed towards Target

That will make the missile speed increase gradually. A simple ITE will stop acceleration increase.

The first time it's 300. Then 305, Then 310, Then 315, then 320, and so on. Just play with the values untill you find a speed/acceleration rate you like.

Since it requires a 0.03 loop to make the movement smooth, you should multiply all these values by 0.03.

 

[rulerofiron99]

Assuming you're using a projectile system, you simply increase the missile speed every iteration, using and if/then/else to only increase the speed if it is below maximum.

 

[Steel0RaZoR]

can you show me the triggers?

 

[Spartipilo]

GUI or JASS?

EDIT: I Hope it's JASS: Take a minute to read all the code, functions, and comments. Try to see the logic in all that stuff, and always feel free to ask anything you want. I tested and works perfectly. It's a bit fast though, thankfully really easy to modify.

globals
    hashtable MissileHash = InitHashtable()
    real MissileSpeed = 6 // This is 200 * 0.03
    real MissileAcceleration = 0.15 // This is 5 * 0.03
    integer MissileAbilityId = 'AUan' // Place the ID Of the Missile Cast Ability
    integer MissileId = 'hfoo' // Place the ID of the Missile Unit
endglobals

// No need to touch this. This is to clear the Missile data when target dies or missile reaches target
function ClearMissile takes unit missile, integer missileId, timer t returns nothing
    call KillUnit(missile) 
    call PauseTimer(t)
    call DestroyTimer(t)
    call FlushChildHashtable(MissileHash, missileId)
endfunction

// These is basically the Missile Movement every 0.03 checking distance between missile and target.
// No damage nor stun has been added. There are comments where Damage and Stun should be, add them yourself.
function MissileTimerFunc takes nothing returns nothing
    local timer t = GetExpiredTimer() // Timer
    local integer i = GetHandleId(t) // Timer ID
    local unit tg = LoadUnitHandle(MissileHash, i, 1) // Target
    local real counter = LoadReal(MissileHash, i, 2)
    local unit u // Missile
    local real facing // Missile Facing
    local real ux // Missile X
    local real uy // Missile Y
    local real tx // Target X
    local real ty // Target Y
    local real x // Offset Required
    local real y // offset Required
    local real dx // Distance Required
    local real dy // Distance Required
    local real accel // Acceleration
    local real angle // Offset Angle
    local real speed // Missile Speed
    local real distance // Distance
    
    if GetWidgetLife(tg) > 0 then // If Target is alive
    
        set u = LoadUnitHandle(MissileHash, i, 0)
        set tx = GetUnitX(tg)
        set ty = GetUnitY(tg)
        set ux = GetUnitX(u)
        set uy = GetUnitY(u)
        set facing = 57.29 * Atan2(ty-uy, tx-ux)
        call SetUnitFacing(u, facing) // Make Missile Face Target
        
        if counter > 2 then // After 2 seconds
            set accel = LoadReal(MissileHash, i, 3) + MissileAcceleration // Increase Acceleration by 0.15 every 0.03 secs.
            call SaveReal(MissileHash, i, 3, accel)
            set speed = MissileSpeed+accel // Speed + Acceleration
            set angle = facing * 0.01745
            set x = ux + speed * Cos(angle)
            set y = uy + speed * Sin(angle)
            call SetUnitX(u, x) // Move Missile Towards Target
            call SetUnitY(u, y) // Move Missile Towards Target
            set dx = tx-x
            set dy = ty-y
            set distance = SquareRoot(dx*dx + dy*dy)
            if distance <= 16 then
                // Stun the Target
                // Deal Damage
                call ClearMissile(u, i, t) 
            endif
        else
            call SaveReal(MissileHash, i, 2, counter + 0.03) // Increase Counter if it's lower than 2
        endif
    else
        call ClearMissile(u, i, t)
    endif
endfunction

// This happens when you cast the ability.
function Trig_MissileCast_Actions takes nothing returns boolean
    local unit u
    local unit m
    local timer t
    local integer i
    local unit tg
    
    if GetSpellAbilityId() == MissileAbilityId then
        set u = GetTriggerUnit()
        set tg = GetSpellTargetUnit()
        set m = CreateUnit(GetTriggerPlayer(), MissileId, GetUnitX(u), GetUnitY(u), 57.29 * Atan2(GetUnitY(tg)-GetUnitY(u), GetUnitX(tg)-GetUnitX(u))) // Missile Creation
        set t = CreateTimer()
        set i = GetHandleId(t)
        
        call SaveUnitHandle(MissileHash, i, 0, m)
        call SaveUnitHandle(MissileHash, i, 1, tg)
        
        call TimerStart(t, 0.03, true, function MissileTimerFunc)
        
        set t = null
        set u = null
        set m = null
    endif    

    return FALSE
endfunction

//===========================================================================
function InitTrig_Missile_Cast takes nothing returns nothing
    set gg_trg_Missile_Cast = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_Missile_Cast, EVENT_PLAYER_UNIT_SPELL_EFFECT )
    call TriggerAddCondition( gg_trg_Missile_Cast, Condition( function Trig_MissileCast_Actions ) )
endfunction

 

[Steel0RaZoR]

GUI or JASS?

EDIT: I Hope it's JASS: Take a minute to read all the code, functions, and comments. Try to see the logic in all that stuff, and always feel free to ask anything you want. I tested and works perfectly. It's a bit fast though, thankfully really easy to modify.

globals
    hashtable MissileHash = InitHashtable()
    real MissileSpeed = 6 // This is 200 * 0.03
    real MissileAcceleration = 0.15 // This is 5 * 0.03
    integer MissileAbilityId = 'AUan' // Place the ID Of the Missile Cast Ability
    integer MissileId = 'hfoo' // Place the ID of the Missile Unit
endglobals

// No need to touch this. This is to clear the Missile data when target dies or missile reaches target
function ClearMissile takes unit missile, integer missileId, timer t returns nothing
    call KillUnit(missile) 
    call PauseTimer(t)
    call DestroyTimer(t)
    call FlushChildHashtable(MissileHash, missileId)
endfunction

// These is basically the Missile Movement every 0.03 checking distance between missile and target.
// No damage nor stun has been added. There are comments where Damage and Stun should be, add them yourself.
function MissileTimerFunc takes nothing returns nothing
    local timer t = GetExpiredTimer() // Timer
    local integer i = GetHandleId(t) // Timer ID
    local unit tg = LoadUnitHandle(MissileHash, i, 1) // Target
    local real counter = LoadReal(MissileHash, i, 2)
    local unit u // Missile
    local real facing // Missile Facing
    local real ux // Missile X
    local real uy // Missile Y
    local real tx // Target X
    local real ty // Target Y
    local real x // Offset Required
    local real y // offset Required
    local real dx // Distance Required
    local real dy // Distance Required
    local real accel // Acceleration
    local real angle // Offset Angle
    local real speed // Missile Speed
    local real distance // Distance
    
    if GetWidgetLife(tg) > 0 then // If Target is alive
    
        set u = LoadUnitHandle(MissileHash, i, 0)
        set tx = GetUnitX(tg)
        set ty = GetUnitY(tg)
        set ux = GetUnitX(u)
        set uy = GetUnitY(u)
        set facing = 57.29 * Atan2(ty-uy, tx-ux)
        call SetUnitFacing(u, facing) // Make Missile Face Target
        
        if counter > 2 then // After 2 seconds
            set accel = LoadReal(MissileHash, i, 3) + MissileAcceleration // Increase Acceleration by 0.15 every 0.03 secs.
            call SaveReal(MissileHash, i, 3, accel)
            set speed = MissileSpeed+accel // Speed + Acceleration
            set angle = facing * 0.01745
            set x = ux + speed * Cos(angle)
            set y = uy + speed * Sin(angle)
            call SetUnitX(u, x) // Move Missile Towards Target
            call SetUnitY(u, y) // Move Missile Towards Target
            set dx = tx-x
            set dy = ty-y
            set distance = SquareRoot(dx*dx + dy*dy)
            if distance <= 16 then
                // Stun the Target
                // Deal Damage
                call ClearMissile(u, i, t) 
            endif
        else
            call SaveReal(MissileHash, i, 2, counter + 0.03) // Increase Counter if it's lower than 2
        endif
    else
        call ClearMissile(u, i, t)
    endif
endfunction

// This happens when you cast the ability.
function Trig_MissileCast_Actions takes nothing returns boolean
    local unit u
    local unit m
    local timer t
    local integer i
    local unit tg
    
    if GetSpellAbilityId() == MissileAbilityId then
        set u = GetTriggerUnit()
        set tg = GetSpellTargetUnit()
        set m = CreateUnit(GetTriggerPlayer(), MissileId, GetUnitX(u), GetUnitY(u), 57.29 * Atan2(GetUnitY(tg)-GetUnitY(u), GetUnitX(tg)-GetUnitX(u))) // Missile Creation
        set t = CreateTimer()
        set i = GetHandleId(t)
        
        call SaveUnitHandle(MissileHash, i, 0, m)
        call SaveUnitHandle(MissileHash, i, 1, tg)
        
        call TimerStart(t, 0.03, true, function MissileTimerFunc)
        
        set t = null
        set u = null
        set m = null
    endif    

    return FALSE
endfunction

//===========================================================================
function InitTrig_Missile_Cast takes nothing returns nothing
    set gg_trg_Missile_Cast = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_Missile_Cast, EVENT_PLAYER_UNIT_SPELL_EFFECT )
    call TriggerAddCondition( gg_trg_Missile_Cast, Condition( function Trig_MissileCast_Actions ) )
endfunction

I'm sorry but I don't know Jass.

 

[Spartipilo]

Do the following:
1- Create a Trigger
2- Go to Edit -> Convert to Custom Text
3- Delete everything inside
4- Paste this script I gave you.
5- Rename the trigger to whatever you want.
6- Replace these 2 with your own. To know the ID of a unit/ability go to the Object Editor and press CTRL+D. 'AUan' is Animate Dead, and 'hfoo' is Footman.

    integer MissileAbilityId = 'AUan' // Place the ID Of the Missile Cast Ability
    integer MissileId = 'hfoo' // Place the ID of the Missile Unit

That's all.

The damage and stun part is left to add. You can tell me how do you want those to work and i'll add them to the code.

In any case, the Damage/stun goes where it's indicated

...
            if distance <= 16 then
                // Stun the Target
                // Deal Damage
                call ClearMissile(u, i, t) 
            endif
...

You need JNPG for this. It's on my signature.

 

[Steel0RaZoR]

Do the following:
1- Create a Trigger
2- Go to Edit -> Convert to Custom Text
3- Delete everything inside
4- Paste this script I gave you.
5- Rename the trigger to whatever you want.
6- Replace these 2 with your own. To know the ID of a unit/ability go to the Object Editor and press CTRL+D. 'AUan' is Animate Dead, and 'hfoo' is Footman.

    integer MissileAbilityId = 'AUan' // Place the ID Of the Missile Cast Ability
    integer MissileId = 'hfoo' // Place the ID of the Missile Unit

That's all.

The damage and stun part is left to add. You can tell me how do you want those to work and i'll add them to the code.

In any case, the Damage/stun goes where it's indicated

...
            if distance <= 16 then
                // Stun the Target
                // Deal Damage
                call ClearMissile(u, i, t) 
            endif
...

You need JNPG for this. It's on my signature.

Nice. Thanks man

 

[Spartipilo]

Glad to help. Feel free to ask as much as you need.

 

[defskull]

@Spart
To be more precise on using GetWidgetLife, the comparison should be >= 0.405, because that's the accurate minimum Health Point of a unit that it can go before it dies.

 

[gorillabull]

i think his missile is a unit (it can be attacked) so you can just increase its movement speed periodically, just create a unit, then every 10 seconds set its movement speed to +10 if it hasnt colided

 

[defskull]

@gorilla
Once every, 10 seconds ?
Lol why's that ?

It has a smooth acceleration, I'm guessing it's a 0.03 ~ 0.20 of interval per speed increase, but not 10 seconds @@"

 

[edo494]

@Spart
To be more precise on using GetWidgetLife, the comparison should be >= 0.405, because that's the accurate minimum Health Point of a unit that it can go before it dies.

thats true but its not right, because things like tranquility will heal dead units, you should instead of that do IsUnitType(myUnitVariable, UNIT_TYPE_ALIVE) to check

 

[defskull]

By using that check, it's slower in terms of speed.
But oh well, everything has its cons and pros.

 

[edo494]

well yea I agree on that, even if unit is dead it never hearts to damage him some more eh and if the call is slower, then overall the >= check is faster, because it will sometimes evaluate to true and running for dead units, but most likely it wont run so many times that the IsUnitType check would outperform it