Limit the number of unreflected missiles on-screen

bundle/main.lua

@@ -11,6 +11,9 @@ local missile_trail_fade = 0.4
 local missile_trail_min_visibility = 0.03
 local missile_trail_length = math.log(missile_trail_min_visibility, missile_trail_fade)
 
+local unreflected_missiles = 0
+local unreflected_missiles_max = 5
+
 local cities = {}
 local city_radius = 0.05
 
@@ -20,7 +23,7 @@ local explosion_duration = 0.4
 
 local enemies = {}
 local enemy_radius = 0.025
-local enemy_min_shoot = 5
+local enemy_min_shoot = 2
 local enemy_max_shoot = 20
 
 local window_width = nil
@@ -114,6 +117,7 @@ function spawnMissile(x, y, target_x, target_y, speed)
 		trail_length = 0,
 		alive = true
 	})
+	unreflected_missiles = unreflected_missiles + 1
 end
 
 function spawnExplosion(x, y)
@@ -162,7 +166,10 @@ function updateMissiles(dt)
 			-- Collision with the paddle
 			missile.y = paddle_top
 			missile.dy = -missile.dy
-			missile.reflected = true
+			if not missile.reflected then
+				missile.reflected = true
+				unreflected_missiles = unreflected_missiles - 1
+			end
 		end
 
 		for _, city in ipairs(cities) do
@@ -280,8 +287,10 @@ function updateEnemies(dt)
 		enemy.until_shoot = enemy.until_shoot - dt
 		if enemy.until_shoot < 0 then
 			enemy.until_shoot = enemy_min_shoot + math.random() * (enemy_max_shoot - enemy_min_shoot)
-			local target = cities[math.random(1, #cities)]
-			spawnMissile(enemy.x, enemy.y, target.x, target.y, 0.2)
+			if unreflected_missiles < unreflected_missiles_max then
+				local target = cities[math.random(1, #cities)]
+				spawnMissile(enemy.x, enemy.y, target.x, target.y, 0.2)
+			end
 		end
 
 		if not enemy.alive then