Frost Arrows with Frost Nova

[firstblood1510]

I have been working on a spell based on Frost Arrows. I want to make the caster use Frost Nova whenever it casts Frost Arrow.
I tried this:

But the unit instantly casts Frost Nova, instead of landing a hit on the target before casting the skill.
I tried using the (A unit finishes casting an ability), but it the FN did not cast.
I also tried delaying the casting of FN to 0.5, but the game crashed.

Can somebody help me?

 

[Pyrogasm]

Target unit of ability being cast doesn't work after a wait but you can save it in a local variable. Make a new unit variable and then shadow that with 1 custom script line so it behaves like a local variable instead of global.

• Actions
  • Custom script: local unit udg_YOUR_UNIT
  • -------- The line above this MUST be the first in the trigger --------
  • Set YOUR_UNIT = (Target unit of ability being cast)
  • Wait 0.00 game time seconds //basically waits the minimum duration, which is much greater than 0.
  • Unit - Add Acid Shot Slow to (triggering Unit)
  • Unit - Order (Triggering Unit) to Undead Lich - Frost Nova (YOUR_UNIT)
  • Wait 0.30 game time seconds //needs to be longer probably
  • Unit - Remove Acid Shot Slow from (triggering Unit)

That's a pretty sloppy trigger actually and a better implemenation would just be to make some invisible dummy units (don't show on minimap, invulnerable, have Locust or Ghost (visible) but no model. Create one, give it frost nova, order it to use it, and set the unit to expire.

• Set TempPoint = Position of (target unit of ability being cast)
• Unit - Create one DummyCaster for (owner of triggering unit) at TempPoint facing default buidling facing degrees
• Unit - Add Acid Shot Slow to (last created unit)
• Unit - Order (last created unit) to Undead Lich - Frost Nova (Target unit of ability being cast)
• Unit - Apply 1.00 second timed life to (last created unit)

 

[Gauda]

Concerning the Frost-Nova everything has been written by Pyrogasm but there might be another problem since Frozen Arrows is an auto-cast skill.
I already encountered a problem with those skills that they do not trigger the a Start-effect-of-ability-event.
If you order a unit to use this skill by pressing it's button or the hotkey then the event fires but not if the unit uses the Skill as an autocast. So maybe you should test if you ability is concerned of this problem aswell.

Please correct me if i am wrong.

 

[Jampion]

Gauda is right. You should use a DDS to catch the event when the unit is hit by the frost arrow.

 

[Gauda]

Since i am also having some trouble with it: Do you know if there is another event that catches Auto-Casts? (Otherwise i'll start a test)
I found this thread: Trigger Auto-cast
Is it possible to get it with "Unit - A unit Begins channeling an ability"?

 

[firstblood1510]

I managed to do it this way:

The above triggers are to identify whether the autocast is on or off
and if the autocast is on then the unit with the ability is included in UnitGroup_AcidShot_Casters
and if one of the units in that Unit Group attacks they will cast Acid Shot Slow

I tried using a dummy:

but the dummy is not being created
can somebody tell me what the problem is?

edit:

Target unit of ability being cast doesn't work after a wait but you can save it in a local variable. Make a new unit variable and then shadow that with 1 custom script line so it behaves like a local variable instead of global.

• Actions
  • Custom script: local unit udg_YOUR_UNIT
  • -------- The line above this MUST be the first in the trigger --------
  • Set YOUR_UNIT = (Target unit of ability being cast)
  • Wait 0.00 game time seconds //basically waits the minimum duration, which is much greater than 0.
  • Unit - Add Acid Shot Slow to (triggering Unit)
  • Unit - Order (Triggering Unit) to Undead Lich - Frost Nova (YOUR_UNIT)
  • Wait 0.30 game time seconds //needs to be longer probably
  • Unit - Remove Acid Shot Slow from (triggering Unit)

That's a pretty sloppy trigger actually and a better implemenation would just be to make some invisible dummy units (don't show on minimap, invulnerable, have Locust or Ghost (visible) but no model. Create one, give it frost nova, order it to use it, and set the unit to expire.

• Set TempPoint = Position of (target unit of ability being cast)
• Unit - Create one DummyCaster for (owner of triggering unit) at TempPoint facing default buidling facing degrees
• Unit - Add Acid Shot Slow to (last created unit)
• Unit - Order (last created unit) to Undead Lich - Frost Nova (Target unit of ability being cast)
• Unit - Apply 1.00 second timed life to (last created unit)

Thank you Pyrogasm +rep and to all of you

 

[Pyrogasm]

1. Attacking Unit and Attacked Unit will not work after a wait.

2.The trigger you wrote is also not MUI (if two units attack immediately after each other with the secoks happening before the first's wait 0.5 finishes, the second attack witll overwrite all your variables (like Unit_AcidShot_Target). This will cause the frost first's frost nova to fail to cast on the proper target.

3. A Unit is Attacked is a really awful event that doesn't fire when you think it should. It happens when the attack starts (is ordered by a player) so it can be abused by spamming right click + S to trigger the event without actually attacking. I would really recommend against using it at all costs and would instead suggested you get a DDS and trigger the frost nova to run off that.

4. Instead of "create units facing point" and use the same point for creation and facing you can just use "create unit ... facing Default Building Facing degrees.

5. You leak Point_AcidShot_TargetPoint. Clean it up at the end with Custom Script: call RemoveLocation(udg_Point_AcidShot_TargetPoint)

6. Now that you fixed the autocast thing by making the group, your trigger no longer does the frost nova on units manually targeted by the spell.

 

[firstblood1510]

Can I use DDS for each spells?
or should i use only one DDS where all spells are incorporated?

 

[Pyrogasm]

Can I use DDS for each spells?
or should i use only one DDS where all spells are incorporated?

You absolutely should not use multiple DDSes in your map. You only need one and having multiple will probably break ALL of them. Pick one you like, install it, and modify any other systems/spells that use a different DDS.

 

[Fruit Forest]

But the unit instantly casts Frost Nova, instead of landing a hit on the target before casting the skill.
I tried using the (A unit finishes casting an ability), but it the FN did not cast.
I also tried delaying the casting of FN to 0.5, but the game crashed.

Can somebody help me?

I tried using a dummy:

Then somebody uses the "Unit is Attacked" my heart is getting hurt.
Leave the team UNITISATTACKED and join the DamageDetection club like a real dude.
The system is MUI and uses GUI Friendly Damage Detection