feat: entering new rooms

- door connects two rooms
- detects if player enters a door, if so, then switch room and update player location

3 files changed, 57 insertions, 15 deletions

diff --git a/objects/Direction.lua b/objects/Direction.lua
new file mode 100644
index 0000000..eaf843a
--- /dev/null
+++ b/objects/Direction.lua
@@ -0,0 +1,12 @@
+Direction = {
+    LEFT = 1, RIGHT = 2, TOP = 3, BOTTOM = 4
+}
+
+OppositeDirection = {
+    [Direction.LEFT] = Direction.RIGHT,
+    [Direction.RIGHT] = Direction.LEFT,
+    [Direction.TOP] = Direction.BOTTOM,
+    [Direction.BOTTOM] = Direction.TOP
+}
+
+return Direction, OppositeDirection
diff --git a/objects/Door.lua b/objects/Door.lua
index 0be3b34..d667406 100644
--- a/objects/Door.lua
+++ b/objects/Door.lua
@@ -2,8 +2,8 @@ Door = {}
 Door.__index = Door
 
 local function calculateDoorLocation(obj)
-    local roomX, roomY = obj.room:getX(), obj.room:getY()
-    local roomW, roomH = obj.room:getWidth(), obj.room:getHeight()
+    local roomX, roomY = obj.within:getX(), obj.within:getY()
+    local roomW, roomH = obj.within:getWidth(), obj.within:getHeight()
     local loc, size, thickness = obj.location, obj.size, obj.thickness
 
     if loc == Direction.LEFT or loc == Direction.RIGHT then
@@ -19,13 +19,14 @@ local function calculateDoorLocation(obj)
     end
 end
 
-function Door:new(location, room)
+function Door:new(location, within, to)
     local obj = {
-        to = nil,
         location = location,
         size = config.graphics.doorSize,
         thickness = config.graphics.doorThickness,
-        room = room,
+
+        within = within,
+        to = to,
 
         x = nil, -- location and size is calculated afterwards
         y = nil,
@@ -44,4 +45,20 @@ function Door:setTo(room)
     self.to = room
 end
 
+function Door.connect(room1, room2, way)
+    local door1, door2
+    if way == "lr" then
+        door1 = Door:new(Direction.LEFT, room1, room2)
+        door2 = Door:new(Direction.RIGHT, room2, room1)
+        room1:addDoor(door1)
+        room2:addDoor(door2)
+    elseif way == "tb" then
+        door1 = Door:new(Direction.TOP, room1, room2)
+        door2 = Door:new(Direction.BOTTOM, room2, room1)
+        room1:addDoor(door1)
+        room2:addDoor(door2)
+    end
+    return door1, door2
+end
+
 return Door
diff --git a/objects/room.lua b/objects/room.lua
index 2fc09e7..63360e1 100644
--- a/objects/room.lua
+++ b/objects/room.lua
@@ -7,23 +7,21 @@ local RoomType = {
     LOOT = 3
 }
 
-Direction = {
-    LEFT = 1, RIGHT = 2, TOP = 3, BOTTOM = 4
-}
-
-function Room:new()
+function Room:new(type, w, h)
     local obj = {
-        width = 0.85, height = 0.8,
+        type = type or RoomType.INITIAL,
+        width = w or 0.85,
+        height = h or 0.8,
         doors = {},
-        borders = {},
         enemies = {},
         isCleared = false,
-        type = RoomType.INITIAL
+
+        -- borders are automatically caculated afterwards
+        borders = {},
     }
 
     setmetatable(obj, Room)
 
-    table.insert(obj.doors, Door:new(math.random(1,4), obj))
     obj.borders = obj:getBorders()
 
     return obj
@@ -53,7 +51,11 @@ function Room:getBorders()
     return { left, right, top, bottom }
 end
 
-function Room:switch(to)
+function Room:addDoor(door)
+    table.insert(self.doors, door)
+end
+
+function Room.switch(to)
     if type(to) == "table" then
         G.currentRoom = to
     elseif type(to) == "number" then
@@ -61,4 +63,15 @@ function Room:switch(to)
     end
 end
 
+function Room.generate()
+    local room1 = Room:new()
+    local room2 = Room:new()
+    Door.connect(room1, room2, "lr")
+
+    local room3 = Room:new()
+    Door.connect(room3, room2, "tb")
+
+    return room1
+end
+
 return Room