Make A Unit only attack specific unit when come in range

[MasterRide]

Hai , first of all english is not my native language so sorry if there's any bad grammar. My question is:
I make 1 unit that can attack anything, but when this unit come near any tower or building i want that unit only focus attacking them. if u play dota it was like their siege unit , only attack the tower when this siege unit is near the tower and if the tower destroyed the siege unit continue move and can attack anything again. Please help me, thank you.

 

[Uncle]

Hai , first of all english is not my native language so sorry if there's any bad grammar. My question is:
I make 1 unit that can attack anything, but when this unit come near any tower or building i want that unit only focus attacking them. if u play dota it was like their siege unit , only attack the tower when this siege unit is near the tower and if the tower destroyed the siege unit continue move and can attack anything again. Please help me, thank you.

I'm not sure if there's an easier way to do it but these triggers will work:

• Siege Focus Structures
  • Events
    • Unit - A unit Is attacked
  • Conditions
    • (Level of Siege Focus Structures (Siege System) for (Attacking unit)) Equal to 1
    • ((Attacked unit) is A structure) Equal to False
  • Actions
    • Set VariableSet Siege_Attacker = (Attacking unit)
    • Set VariableSet Siege_Point = (Position of Siege_Attacker)
    • Set VariableSet Siege_Group = (Units within (Default acquisition range of Siege_Attacker) of Siege_Point.)
    • Custom script: call RemoveLocation( udg_Siege_Point )
    • -------- --------
    • -------- Determine if we've found a structure to retarget to: --------
    • Set VariableSet Siege_Found_Target = False
    • Unit Group - Pick every unit in Siege_Group and do (Actions)
      • Loop - Actions
        • Set VariableSet Siege_Target = (Picked unit)
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • Siege_Found_Target Equal to False
            • (Siege_Target is A structure) Equal to True
            • (Siege_Target is alive) Equal to True
            • (Siege_Target belongs to an enemy of (Owner of Siege_Attacker).) Equal to True
          • Then - Actions
            • Set VariableSet Siege_Found_Target = True
          • Else - Actions
    • -------- --------
    • Custom script: call DestroyGroup( udg_Siege_Group )
    • -------- --------
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • Siege_Found_Target Equal to True
      • Then - Actions
        • -------- It found a nearby structure to attack! --------
        • Trigger - Turn off Siege Focus Structures <gen>
        • Unit - Order Siege_Attacker to Attack Siege_Target
        • Trigger - Turn on Siege Focus Structures <gen>
      • Else - Actions
        • -------- No structure found! --------
        • Unit - Set level of Siege Focus Structures (Siege System) for Siege_Attacker to 2
        • Trigger - Run Siege Focus Remove Restriction <gen> (ignoring conditions)

• Siege Focus Remove Restriction
  • Events
  • Conditions
  • Actions
    • -------- Note: --------
    • -------- This trigger prevents a Siege attacker from constantly trying to re-target when there are no nearby structures. --------
    • -------- --------
    • Custom script: local unit u = udg_Siege_Attacker
    • Wait 3.00 game-time seconds
    • Custom script: set udg_Siege_Attacker = u
    • Custom script: set u = null
    • Unit - Set level of Siege Focus Structures (Siege System) for Siege_Attacker to 1

This ability should be added to your Siege units that use this system:

 

[MasterRide]

I'm not sure if there's an easier way to do it but these triggers will work:

• Siege Focus Structures
  • Events
    • Unit - A unit Is attacked
  • Conditions
    • (Level of Siege Focus Structures (Siege System) for (Attacking unit)) Equal to 1
    • ((Attacked unit) is A structure) Equal to False
  • Actions
    • Set VariableSet Siege_Attacker = (Attacking unit)
    • Set VariableSet Siege_Point = (Position of Siege_Attacker)
    • Set VariableSet Siege_Group = (Units within (Default acquisition range of Siege_Attacker) of Siege_Point.)
    • Custom script: call RemoveLocation( udg_Siege_Point )
    • -------- --------
    • -------- Determine if we've found a structure to retarget to: --------
    • Set VariableSet Siege_Found_Target = False
    • Unit Group - Pick every unit in Siege_Group and do (Actions)
      • Loop - Actions
        • Set VariableSet Siege_Target = (Picked unit)
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • Siege_Found_Target Equal to False
            • (Siege_Target is A structure) Equal to True
            • (Siege_Target is alive) Equal to True
            • (Siege_Target belongs to an enemy of (Owner of Siege_Attacker).) Equal to True
          • Then - Actions
            • Set VariableSet Siege_Found_Target = True
          • Else - Actions
    • -------- --------
    • Custom script: call DestroyGroup( udg_Siege_Group )
    • -------- --------
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • Siege_Found_Target Equal to True
      • Then - Actions
        • -------- It found a nearby structure to attack! --------
        • Trigger - Turn off Siege Focus Structures <gen>
        • Unit - Order Siege_Attacker to Attack Siege_Target
        • Trigger - Turn on Siege Focus Structures <gen>
      • Else - Actions
        • -------- No structure found! --------
        • Unit - Set level of Siege Focus Structures (Siege System) for Siege_Attacker to 2
        • Trigger - Run Siege Focus Remove Restriction <gen> (ignoring conditions)

• Siege Focus Remove Restriction
  • Events
  • Conditions
  • Actions
    • -------- Note: --------
    • -------- This trigger prevents a Siege attacker from constantly trying to re-target when there are no nearby structures. --------
    • -------- --------
    • Custom script: local unit u = udg_Siege_Attacker
    • Wait 3.00 game-time seconds
    • Custom script: set udg_Siege_Attacker = u
    • Custom script: set u = null
    • Unit - Set level of Siege Focus Structures (Siege System) for Siege_Attacker to 1

View attachment 472639
This ability should be added to your Siege units that use this system:
View attachment 472641

big thank you for your help, i'll try this trigger.
but how about the "move along" i mean when he not find any structure or the structure was destroyed he will continue move to the targeted position

 

[Uncle]

No problem.

If you want a unit to attack towards a position you use the Attack-Move order:

• Actions
  • Set Variable TempPoint = (Some position)
  • Unit - Order (Some unit) to Attack-Move to TempPoint

But I imagine this order will break that previous order:

• Unit - Order Siege_Attacker to Attack Siege_Target

In which case, you simply need to re-issue the order again when it can't find a Siege_Target:

• -------- No structure found! --------
• Set Variable TempPoint = (Some position)
• Unit - Order Siege_Attacker to Attack-Move to TempPoint

 

[MasterRide]

Thank you its work. Sorry for late reply. +rep