I need a trap cog that automatically targets a walkplayer using a lob fire-action. (such as the thermal det reeyees in level 2).
The trap should fire from a ghost object (1 object) when another ghost object has sight of the player (to make the effect of lobbing fire over a small hill)...

Additionally, it should never deactivate but always be active from the beginning.

I could do it if it was an enemy using AI, but cog is another story (the trap should calculate a trajectory to hit the player (they will be different depending on the player's position), not like dropping TDs or anything. AI lobfire command does this right. But cog? Any ideas?

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nil nip nada zip zero naught lip zil

How about an invisable Reeyee, with no sound, and the AI turns on only when you want to...
Or, have the ghost rotate, and a little force tagetting thingy where... EG.
Ghost rotates... Spots Player, targeted, continue rotating until target is in the middle, and then FireProjectile(ghost,grenade,-1,-1,'0 0 0','0 0 0',distance,0x1,0,0);

Hope this gives you an idea on what to do. If not, then... Next person!

Thats interesting, an invisible actor-thingy with certain actor flags where it cannot move. How would I make it so it wouldn't die?

Here's an easier question:
is LobFire possible through cog? is seems like all cog weapons are either linear or dropped, not trajectories

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nil nip nada zip zero naught lip zil

In Chaos Eternal there were lob-fire gran that were dead-on. I'd check out the cog from that.