[JASS] Detecting if attack landed

[Deep Sea Kraken]

I'm making a map, and one of the hero abilities is an evasion spell, that also had a secondary effect that only works if the attack was dodged.

Is there a JASS function that detects whether or not an attack hit or missed?

 

[Herman]

I suppose you could do it

But that would be extremely complicated

I think the way I'd do it, is track the trajectory path of the unit's attack, and then check right before it takes the hit (like .000001 of a second) set a variable to the targets life, and then check right after the hit (again, extremely accurately) if the life is lower than before

This kind of code would require extensive knowledge of JASS coding, and probably physics, I have no idea how I'd go about doing it myself

 

[Ghan_04]

There's always the Unit Takes Damage event.
That could be helpful.

 

[Herman]

Hmmm

Oh wow, I completely forgot about that

You could just set the takes damage event (a little tricky but easy enough), and then make a condition for the event that the damager (triggering unit, I think?) is the unit that the spell works for

Heh, shouldn't be as overwhelming as I thought, all this JASS is going to my head ><

 

[DiscipleOfLife]

Attacks that miss don't fire EVENT_UNIT_DAMAGED events

 

[Justify]

Then just trigger your evasion? Give it 0% Chance in the editor, and on damage events get the abilitylevel, use a random int for the chance and set the life to life + damage taken. If you want you could add the 'miss' tag to the attacker, no problem

 

[Earth-Fury]

Then just trigger your evasion? Give it 0% Chance in the editor, and on damage events get the abilitylevel, use a random int for the chance and set the life to life + damage taken. If you want you could add the 'miss' tag to the attacker, no problem

Damage is dealt after triggers registered to fire on damage events are executed. You would need to:

• Ensure damage < life
  • If damage > life, increase life above damage
• Start a timer with a 0 timeout
• In the callback, reset life to the original values.

As for detecting when an actual attack lands, that one is a bitch. Its possible to detect when an attack starts, and when any damage is taken. Anything in between is not easy at all.

 

[PurplePoot]

You could always just give it a time limit, based on the cooldown if that's constant.

Or trigger the evasion.

 

[Justify]

Btw when we are talking about a triggered evasion:

You need to seperate spells from normal attacks, but if you just check for damage, spells would be included (and don't say I have to test for all spells, in the end this would be around 150 in my map x.x )

 

[PurplePoot]

Slow Poison (Or something else that leaves a buff on attack).

 

[Deep Sea Kraken]

Btw when we are talking about a triggered evasion:

You need to seperate spells from normal attacks, but if you just check for damage, spells would be included (and don't say I have to test for all spells, in the end this would be around 150 in my map x.x )

Err, Justify, Did you just try to hijack my thread? That last comment there sounded ALOT like it.

[ontopic]
I couldn't use the buff on attack idea, because that will stop working as soon as there are multiple units attacking the unit.

 

[Justify]

1) No, sry just thought it's a good situation to ask.

2) I don't know how it looks like ingame, but you can make the poison stack, if it creates a new buff you could work with this?

 

[Herman]

Uhhh

I think you could go and do what I was talking about earlier, damage event, the damager must be the one w/ the spell. Shouldn't be too difficult to trigger it that way (using a global unit or maybe a group? not sure how you would do it using JASS)

 

[DiscipleOfLife]

I couldn't use the buff on attack idea, because that will stop working as soon as there are multiple units attacking the unit.

You can remove buffs with UnitRemoveAbility(unit, buffid).

Also if you don't feel like reinventing the wheel you could just use this.

 

[Deep Sea Kraken]

Im not that good with JASS to be honest, and I've had problems with JassNewgen (VJass?) Editor making my maps unhostible (doesn't give me an error at all, It makes it so the map isnt even selectable on the gamelist)

 

[PurplePoot]

Err, Justify, Did you just try to hijack my thread? That last comment there sounded ALOT like it.

[ontopic]
I couldn't use the buff on attack idea, because that will stop working as soon as there are multiple units attacking the unit.

Unless two units hit at the same time (which is impossible), not at all true. Just remove the buff when they are dealt the damage (which is instant anyways)

Make sure the buff icon is textures\black32.blp, or else sometimes you will see the buff icon flash for a fraction of a second (looks a little weird ingame).

 

[Herman]

Buff flashes

A bit offtopic, but I have seen those buff flashes in DotA (and other AoS maps) numerous times, so all I need to do is set the icons for the buff/effects to textures\black32.blp??