[Trigger] check (or condition) "does unit have valid pathable route to target"

[Greenwhy]

I was hoping to find a check, or a condition, which is able to determine weather or not a unit has a valid path to another unit?

My reasoning is in the context of mazing.
Something like:

If there is a valid path that a unit has to it's current target
then order unit to attack Target
else order unit to attack move toward position of target.

would be ideal. (I understand SC2 has a native oncdition along the lines of "can unit move from point A to point B" but I don't want to use sc2.

Thanks.

 

[Zwiebelchen]

Something like this is impossible without a complex pathing algorithm.

Tower defences usually use hidden units that get constantly sent through your maze and if they haven't moved for a certain amount of time, the player is punished (as when the unit can not reach the target, it will try to get close to the target and then stop moving).

 

[Greenwhy]

Ah OK. Yes I understand these triggers use the "get unit order = none" then explode.

So I guess my next question is... How does This map (http://www.hiveworkshop.com/forums/...a-79998/?prev=search=kodo%20treme&d=list&r=20) control the orders of the Kodos. They seem to fairly intelligently track down the player units or, if there is no path, begin to attack structures.


I've tried to reverse engineer the code but as the map was deprotected I find it very confusing.

 

[Dr Super Good]

This is not directly possible in Warcraft III. StarCraft II lets you do this very easily and efficiently with a native function call (which is why maze blocking is not a problem in SC2 TDs).

I believe nestharus made such a system, or at least knows who did.

 

[DysfunctionaI]

Yeah, someone did make one, it may have been nes, I can't remember. Line Tower Wars uses it too.