rename addPhysicsWorld (has nothing to do with physics)

obj/Area.lua

@@ -16,9 +16,14 @@ end
 ---Updates area
 ---@param dt number
 function Area:update(dt)
-    for i, game_object in ipairs(self.game_objects) do
-        if game_object:isDead() then table.remove(self.game_objects, i) end
+    for i = #self.game_objects, 1, -1 do
+        local game_object = self.game_objects[i]
+
         game_object:update(dt)
+
+        if game_object:isDead() then
+            table.remove(self.game_objects, i)
+        end
     end
 end
 
@@ -27,6 +32,18 @@ function Area:draw()
     for _, game_object in ipairs(self.game_objects) do game_object:draw() end
 end
 
+---Destroys area
+function Area:destroy()
+    for i = #self.game_objects, 1, -1 do
+        local game_object = self.game_objects[i]
+        game_object:kill()
+        table.remove(self.game_objects, i)
+    end
+    self.game_objects = {}
+
+    if self.world then self.world = nil end
+end
+
 ---Adds game object to area
 ---@param game_object_type string name of game object's class
 ---@param x number|nil horizontal position
@@ -38,9 +55,9 @@ function Area:addGameObject(game_object_type, x, y, opts)
     return game_object
 end
 
----Initializes HC physics as a world
+---Initializes HC collision manager as a world
 ---@param cell_size number|nil
-function Area:addPhysicsWorld(cell_size)
+function Area:addCollisionManager(cell_size)
     self.world = HC(cell_size or 100)
 end
 

obj/GameObject.lua

@@ -18,6 +18,7 @@ function GameObject:new(area, x, y, opts)
     self.id = UUID()
     self.dead = false
     self.timer = Timer()
+    self.collider = nil
 end
 
 ---Updates game object
@@ -36,6 +37,10 @@ function GameObject:destroy()
         self.timer:clear()  -- cancel all tweens/after/every
         self.timer = nil
     end
+    if self.collider then
+        self.area.world:remove(self.collider)
+        self.collider = nil
+    end
     self.dead = true
 end
 

obj/game/Player.lua

@@ -25,6 +25,7 @@ end
 
 function Player:update(dt)
     Player.super.update(self, dt)
+    if self:isDead() then return end
 
     -- controls
     if input:down('left') then self.r = self.r - self.rv*dt end
@@ -41,6 +42,8 @@ function Player:update(dt)
 
     -- move collision area
     self.collider:moveTo(self.x, self.y)
+
+    if input:pressed('f2') then self:kill() end
 end
 
 function Player:draw()

rooms/Stage.lua

@@ -3,7 +3,7 @@ local Stage = Room:extend()
 
 function Stage:new()
     Stage.super.new(self)
-    self.area:addPhysicsWorld()
+    self.area:addCollisionManager()
     self.area:addGameObject('Player', gw/2, gh/2)
 end