From cc73f371a56695b03983a831edcae35d4d275e22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juhani=20Krekel=C3=A4?= <juhani@krekelä.fi>
Date: Fri, 2 Jun 2023 18:04:16 +0300
Subject: [PATCH] Make enemies killable

---
 bundle/main.lua | 65 +++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 55 insertions(+), 10 deletions(-)

diff --git a/bundle/main.lua b/bundle/main.lua
index 536d668..a4ea5a1 100644
--- a/bundle/main.lua
+++ b/bundle/main.lua
@@ -60,8 +60,16 @@ function love.load()
 	setScreenDimensions(width, height)
 	movePaddle(0)
 	spawnCities()
-	spawnEnemy(0.5, 0.1)
-	spawnEnemy(0.1, 0.3)
+	spawnEnemy(0.1, 0.1, false)
+	spawnEnemy(0.2, 0.1, true)
+	spawnEnemy(0.3, 0.1, false)
+	spawnEnemy(0.4, 0.1, true)
+	spawnEnemy(0.5, 0.1, false)
+	spawnEnemy(0.6, 0.1, true)
+	spawnEnemy(0.7, 0.1, false)
+	spawnEnemy(0.8, 0.1, true)
+	spawnEnemy(0.9, 0.1, false)
+	spawnEnemy(0.1, 0.3, true)
 end
 
 function spawnCities()
@@ -107,11 +115,13 @@ function spawnExplosion(x, y)
 	})
 end
 
-function spawnEnemy(x, y)
+function spawnEnemy(x, y, active)
 	table.insert(enemies, {
 		x = x,
 		y = y,
-		until_shoot = math.random() * (enemy_max_shoot - enemy_min_shoot)
+		active = active,
+		until_shoot = math.random() * (enemy_max_shoot - enemy_min_shoot),
+		alive = true
 	})
 end
 
@@ -164,6 +174,20 @@ function updateMissiles(dt)
 			end
 		end
 
+		if missile.reflected then
+			for _, enemy in ipairs(enemies) do
+				local dx = enemy.x - missile.x
+				local dy = enemy.y - missile.y
+				local distance = math.sqrt(dx * dx + dy * dy)
+				if distance < enemy_radius then
+					spawnExplosion(missile.x, missile.y)
+					-- Freeze the missile in-place
+					missile.dx = 0
+					missile.dy = 0
+				end
+			end
+		end
+
 		if collided then
 			table.insert(missile.history, 1, {
 				x = missile.x,
@@ -205,6 +229,16 @@ function updateExplosions(dt)
 			end
 		end
 
+		-- Destroy enemies within range
+		for _, enemy in ipairs(enemies) do
+			local dx = enemy.x - explosion.x
+			local dy = enemy.y - explosion.y
+			local distance = math.sqrt(dx * dx + dy * dy)
+			if distance < explosion.radius + enemy_radius then
+				enemy.alive = false
+			end
+		end
+
 		explosion.remaining = explosion.remaining - dt
 
 		if explosion.remaining < explosion_duration * 0.2 then
@@ -228,12 +262,23 @@ function updateExplosions(dt)
 end
 
 function updateEnemies(dt)
-	for _, enemy in ipairs(enemies) do
-		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)
+	local i = 1
+	while i <= #enemies do
+		local enemy = enemies[i]
+
+		if enemy.active then
+			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)
+			end
+		end
+
+		if not enemy.alive then
+			table.remove(enemies, i)
+		else
+			i = i + 1
 		end
 	end
 end