add towers / effects

Tower.lua

@@ -0,0 +1,42 @@
+local Tower = {}
+Tower.__index = Tower
+
+function Tower:new(model, position, range, damage, fireRate, effect)
+    local self = setmetatable({}, Tower)
+    self.model = model:Clone()
+    self.model.Position = position
+    self.model.Anchored = true
+    self.model.Parent = workspace
+    self.range = range
+    self.damage = damage
+    self.fireRate = fireRate or 1 -- shots per second
+    self.effect = effect -- set of params for effect
+    self.lastFire = 0
+    return self
+end
+
+function Tower:canAttack(enemy)
+    if not enemy.alive or not enemy.model or not enemy.model.PrimaryPart then return false end
+    local dist = (self.model.Position - enemy.model.PrimaryPart.Position).Magnitude
+    return dist <= self.range
+end
+
+function Tower:attack(enemies, dt)
+    self.lastFire = self.lastFire + dt
+    if self.lastFire >= (1 / self.fireRate) then
+        for _, enemy in ipairs(enemies) do
+            if self:canAttack(enemy) then
+                enemy:damage(self.damage)
+
+                if self.effect then
+                    enemy:applyEffect(self.effect.name, self.effect.params)
+                end
+
+                self.lastFire = 0
+                break -- Only attack one enemy per fire
+            end
+        end
+    end
+end
+
+return Tower