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Widow Mine targeting algorithm

Forum Index > SC2 General
Post a Reply
sctstarcraft
Profile Blog Joined March 2013
Poland22 Posts
June 21 2013 09:11 GMT
#1
I searched the forums, but I have found no answers to this question; please post a link to an answer if there is already.

What is the Widow Mine's targeting algorithm? In the unit's description the target is supposedly "the closest unit" (stated here: http://wiki.teamliquid.net/starcraft2/Widow_Mine) but this seems to not be the case.

For me, the targeting seems random. Whenever I am harassed by widow mine drops I try to leave a single probe just next to the mine and escape with the rest. More often than not, a probe in the escaping group is targeted and not the probe next to the mine.

I think that perhaps the targeting happens before the projectile is fired - and since there is the delay during which, possibly, I move the probes, the attack seems random.

Does anyone *know* how it really works?
All we see or seem is but a dream within a dream
gillon
Profile Blog Joined April 2010
Sweden1578 Posts
June 21 2013 09:19 GMT
#2
It chooses the closest unit and then starts the cast. If that unit leaves the range it has, it starts the process over - going with the closest unit at that point and starting the cast. This is repeated until the mine actually fires.

It can also be manually targeted.
www.teamproperty.net | "You should hate losing, but you should never fear defeat." - 이윤열
FakeDouble
Profile Blog Joined September 2010
Australia676 Posts
June 21 2013 09:21 GMT
#3
You do know that the opponent has a small window to manually target the widow mine right? This may or may not be happening, watch the replay to find out. Otherwise it is supposed to be the closest unit.
Formerly known as carbonaceous
shell
Profile Joined October 2010
Portugal2722 Posts
June 21 2013 09:23 GMT
#4
Dude you are forgetting that people can target at will with the widow mine
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RevThirteen
Profile Joined November 2010
Sweden116 Posts
June 21 2013 09:53 GMT
#5
On June 21 2013 18:11 sctstarcraft wrote:


I think that perhaps the targeting happens before the projectile is fired - and since there is the delay during which, possibly, I move the probes, the attack seems random.


Targetting happens when it starts loading the missile, not after it's been loaded.
Rannasha
Profile Blog Joined August 2010
Netherlands2398 Posts
June 21 2013 10:05 GMT
#6
All units (unless microed) target whatever is in range and has the highest attack priority. Attack priority is typically determined by the question "can it fire back at me?" (so flyers prioritise anti-air units if they're in range). If several targets have equal priority, the unit will pick the target that is closest.

In case of the widow mine, there is a delay between target-selection (when the mine becomes briefly visible for the opponent) and the firing of the missile. During this delay, if a unit moves out of range, the mine has to retarget. If not, it will fire at that target even if it has moved to the edge of the firing range.
Such flammable little insects!
BobMcJohnson
Profile Blog Joined October 2010
France2916 Posts
Last Edited: 2013-06-21 11:10:36
June 21 2013 11:08 GMT
#7
From the Terran Help me Thread:
TheDwf wrote:
Mines are technically time bombs. Whenever a target enters the radius of a burrowed Mine, the target is acquired, and after a 1.5 seconds delay the Mine shoots if the target is still within its range. You can manually target with Mines: during this 1.5 seconds interval, manually selecting another target in the radius of the Mine will reset the time bomb and thus the aforementioned protocol (1.5 seconds delay → is the target still in range? if yes, shoot; if no, auto-acquire another target if there is one available). If, for some reason, you need to hold fire with a Mine, you can keep switching targets and prevent the Mine from shooting until you're ready.

Mines have 5 range, but can sometimes trigger against 6-ranged targets (such as Stalkers, Marauders or Hydralisks with the range upgrade) attacking them because instead of stopping at exactly 6 range, it seems units sometimes do not decelerate properly and step a little further forward, thus entering the range of the Mine and suffering its wrath.

Mines cannot auto-acquire the same target at the same time. If one Zergling walks in the range of 5 Mines, only one of them will shoot. If one Immortal enters the range of 3 Mines at the same time, they will not fire at once but successively shoot (i. e. the first Mine will lock on it and shoot, after which the second Mine will lock on it and shoot, after which the third Mine will lock on it and shoot). You can circumvent this problem by manually targetting the desired target so Mines fire at once, but in this case Mines can overkill.

Mines need detection to acquire cloaked targets.

Mines deal splash damage to your troops, but not to your other Mines.

Mines do not trigger on morphed Changelings.

Mines do trigger on Hallucinations unless you have detection to reveal them.

Extra info can be found here.


Which is what is stated on liquipedia and is correct.
Romanes eunt domus
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