A tower that shoots a projectile

[reddenx]

Needs:

• [x] A projectile that on contact applies it's weapon effects
• [x] This projectile is a fully built game object with a weapon of it's own.
• [x] Weapon effect that (miss or hit) fires a projectile (the one the tower holds)
• [x] Tower fires projectiles at a given rate
• [x] Projectiles have a lifetime
• [x] Functionality to hook into on hit for projectiles (later for explosions and secondary effects, I suppose this could be an effect nvm)

Bonus

• [x] Tower has a single target it acquires on it's own
• [x] Can only acquire targets within a certain range

[rickbatka]

Tons of work done to support this, really basic dumb arrow tower implemented (press Y to spawn).

• Hooked up various combat-related events to hook into.
• Created projectile (arrow) gameobject which has an always-on basic damage effect
• Created arrow tower brain which spawns arrow projectile objects at enemies within range at a fixed rate
• changed healing tower to heal in bursts with a cooldown effect too, so the behavior is consistent with the arrow tower brain
  • created the notion of deleting objects and implemented in arrows
  • added Friendly bool to gameobjects and weapon effects. Defaults to false, meaning you always have to set Friendly to true when creating non-enemy stuff in factories, IMPORTANT!

Still to do:

• [x] arrows should not chase the player, should follow straight line (easy)
• [x] arrows should use an easing function to get where they're going in a more cool looking way (this introduces the need for a different movement component that's not Input control based, medium hard)
• [x] lifetime for projectiles could also be handled by just killing them when they hit their target (target is a point that won't move once I change the arrow brain to not follow the target).

[reddenx]

how about instead of killing them on hit universally, we have them handle their hit based on a one of their components, that way we don't have to refactor when we implement projectiles that can fly through things (like a cannonball, ballista shot, I dunno).

[rickbatka]

• [ ] addt'l task: make the arrow that flies out of the tower a single child gameobject of the tower, instead of the empty game object with weapon that we have going on now.

[reddenx]

I'd recommend not making it a child, for 2 reasons, it is no longer associated with the tower in any way, child objects have the same lofe scope as their parents, meaning killing a tower would make all thr flying arrow disappear, depending on implementation. We could instead have a projectile physics that flies without friction checking it's damage dots and doing it'a thing on collision, probably based on its brain. On May 22, 2014 10:05 PM, "Rick Batka" notifications@github.com wrote:

• addt'l task: make the arrow that flies out of the tower a single child gameobject of the tower, instead of the empty game object with weapon that we have going on now.

— Reply to this email directly or view it on GitHubhttps://github.com/rickbatka/co-op-engine/issues/31#issuecomment-43971629 .

[rickbatka]

That makes sense.

[reddenx]

I think this is pretty much done? all req met.