Header

    globals
        ProjectileType PT
        MultiboardValues MB
    endglobals
    
    function hitPT takes Projectile P, Unit U returns nothing
        local Tower T = P.getCaster()
        //local AttackType AT = P.userInt
        call T.doCustomAttackDamage( U, P.userReal, T.calcAttackMulticrit( 0, 0, 0 ), P.userInt )
    endfunction
    
    //Do not remove or rename this function!
    //Put your initialization tasks here, this function will be called on map init
    private function init takes nothing returns nothing
        set PT = ProjectileType.createInterpolate( "Abilities\\Spells\\Other\\TinkerRocket\\TinkerRocketMissile.mdl", 1000.00 )
        call PT.setEventOnInterpolationFinished( hitPT )
        
        set MB = MultiboardValues.create( 1 )
        call MB.setKey( 0, "Damage" )
    endfunction

On Item Pickup

function onPickup  takes Item itm returns nothing
    local Tower T = itm.getCarrier()
    
    if T.getAttackType() != AttackType.MAGIC then
        set itm.userInt = T.getAttackType()
    else
        set itm.userInt = AttackType.ESSENCE
    endif
endfunction

On Tower Details

function onTowerDetails takes Item itm returns MultiboardValues
    local Tower T = itm.getCarrier()
    local real dmg = T.getCurrentAttackDamageWithBonus() * ( T.getProp_SpellDmgDealt() * ( 0.2 + 0.008 * T.getLevel() ) )
    call MB.setValue( 0, formatFloat( dmg, 0 ) )
    return MB
endfunction

Periodic

function periodic takes Item itm returns nothing
    local Tower T = itm.getCarrier()
    local Iterate I = Iterate.overUnitsInRangeOfCaster( T, TARGET_CREEPS, T.getRange() )
    local Unit U
    local real dmg
    local Projectile P
    
    call Event.getCurrentPeriodicEvent().enableAdvanced( T.getCurrentAttackspeed(), true )
    
    loop
        set U = I.next()
        if U == 0 then
            return //No target
        endif
        
        exitwhen U.isImmune()
    endloop

    //Gotcha
    call I.destroy() //If this point is reached the Iteration still exists and has to be destroyed
    set dmg = T.getCurrentAttackDamageWithBonus() * ( T.getProp_SpellDmgDealt() * ( 0.2 + 0.008 * T.getLevel() ) )
    set P = Projectile.createLinearInterpolationFromUnitToUnit( PT, T, 1.0, 1.0, T, U, 0.35, true )
    set P.userReal = dmg
    set P.userInt = itm.userInt
endfunction