Siege Ballista

Adds an early game alternative to artillery. Has two ammo types: the Ballista Bolt, and the Explosive Ballista Bolt. Ballista bolt projectiles behave similar to tank cannon shells, they travel in a line and can pierce entities. They do not hit friendly entities but they can hit trees and rocks. The ballista will prioritize shooting high health targets like spawners and worms, and will prefer shooting targets they are already lined up with.

Tech is unlocked with Automation, Logistic, and Military Science, and requires the Steel Production and Military I technologies. Explosive bolts are unlocked by the Explosives technology. Scaled by physical projectile damage and weapon shooting speed techs up to tier 5 (+100% damage and speed at tier 5)

This is my first Factorio mod so I used VortiK's Cannon Turret as a template (was most similar to what I wanted)