Call artillery skill

[Foxace]

I would like to create cannon type unit in base, which can issue bombardment at any point in the map as long as its revealed by other units, but I have no idea where to even start.

 

[Nichilus]

I would base it off either Far Sight or Channel (I would stick to channel as it has the "Follow through time" field).

When cannon is issued the order to cast this ability, check the target point if that area is revealed (dunno if there is function for that, as I had no need for that so far, however you could create a unit group with units within X range and check if any is close enough to the point to see it). If no unit is in there, you order cannon to stop (this will prevent mana from being drained and cooldown from starting).

Then when he does successfuly start the cast (if it should work like that atom bomb or whatever it is in SC2), you periodically check the visibility around target point (like every 0,5 seconds or so).

If all is well you just start the bombardment.

 

[Foxace]

But how to create the targeting system?

 

[Meticulous]

You're looking for something like this, yes?

 

[Foxace]

In summary, I just want cannon type unit which works basicly same way as blizzard but with unlimited range. Could it be as simple as just making custom blizzard?

 

[Nichilus]

in a sense, yes. Though rain of fire may be better (it also sets unit ablaze, which could work well with bombs). Problem may be finding correct "bomb" projectile effect, as blizzard and rain of fire are both effects which show the projectile to fall down - they are not real projectiles, only effects.

And of course checking if target point is visible.

 

[Foxace]

Custom rain of fire works fine but it can be cast in fog of war. How to prevent that?

 

[Meticulous]

Custom rain of fire works fine but it can be cast in fog of war. How to prevent that?

I attached a map in my previous post with the triggers you need. It'll work with rain of fire or the artillery example the map uses.