Entity constraints

src/app.coffee

@@ -11,8 +11,6 @@ app = playground(
   ready: ->
     @game.start()
     @setState @game
-  
-  step: ->
 
   render: ->
     @layer.clear "#00f"

src/entities/base.coffee

@@ -8,4 +8,5 @@ class Base
     false
 
   spaceProvided: 50
+  isDockable: true
     

src/entities/miner.coffee

@@ -9,3 +9,4 @@ class Miner
     true
 
   spaceProvided: 5
+  isDockable: false

src/entities/silo.coffee

@@ -19,3 +19,5 @@ class Silo
 
   spaceProvided: 150
 
+  isDockable: true
+

src/game.coffee

@@ -1,15 +1,13 @@
 app.game =
   start: ->
     for i in [0..20*15-1]
-      @map[i] = new Tile
+      @map[i] = new Tile(i)
     @map[20*5+10].entity = new Base
     
-    @currentHoveredTile = new Tile
+    @currentHoveredTile = new Tile(-1)
     @currentSelectedTile = null
 
-    # Start the game tick
     window.setInterval @tick, 1000
-
     @hud.start()
 
   render: ->
@@ -17,14 +15,13 @@ app.game =
       y = Math.floor(i/20)
       x = i-(y*20)
       tile.render(x, y)
-
     @hud.render()
 
   mousedown: (event)->
-    if @isMouseInView event.x, event.y
+    if @isMouseInView event.x/8, event.y/8
       switch event.button
         when 'left'
-          tile = posToTile(event.x, event.y)
+          tile = posToTile(Math.floor(event.x/8), Math.floor(event.y/8))
           tile.click(event.button)
 
           @currentSelectedTile.deselect() if @currentSelectedTile
@@ -36,7 +33,7 @@ app.game =
 
   mousemove: (event)->
     if @isMouseInView event.x, event.y
-      tile = posToTile(event.x, event.y)
+      tile = posToTile(Math.floor(event.x/8), Math.floor(event.y/8))
 
       if tile
         if tile != @currentHoveredTile
@@ -66,11 +63,11 @@ app.game =
     tile.tick() for tile in app.game.map
 
   createMiner: ->
-    if @currentSelectedTile and @checkResource 'stardust', 1, true
+    if @currentSelectedTile and !@currentSelectedTile.entity and @checkResource('stardust', 30, true)
       @currentSelectedTile.entity = new Miner
 
   createSilo: ->
-    if @currentSelectedTile and @checkResource 'stardust', 1, true
+    if @currentSelectedTile and @checkPosition(@currentSelectedTile) and @checkResource('stardust', 20, true)
       @currentSelectedTile.entity = new Silo
 
   checkResource: (type, amount, drain = false) ->
@@ -79,6 +76,34 @@ app.game =
       return true
     false
 
+  checkPosition: (tile)->
+    return false if tile.entity
+
+    # Check all 4 directions
+    [x, y] = posToXY(tile.position)
+
+    # Left
+    return true if app.game.map[xyToPos(x-1, y)].entity \
+      and app.game.map[xyToPos(x-1, y)].entity.isDockable \
+      and x > 0
+
+    # Right
+    return true if app.game.map[xyToPos(x+1, y)].entity \
+      and app.game.map[xyToPos(x+1, y)].entity.isDockable \
+      and x < 19
+
+    # Top
+    return true if app.game.map[xyToPos(x, y-1)].entity \
+      and app.game.map[xyToPos(x, y-1)].entity.isDockable \
+      and y > 0
+
+    # Bottom
+    return true if app.game.map[xyToPos(x, y+1)].entity \
+      and app.game.map[xyToPos(x, y+1)].entity.isDockable \
+      and y < 14
+
+    false
+
   cheatah: ->
     for type, amount of @resources
       @resources[type] = 100
@@ -88,7 +113,7 @@ app.game =
   maxTileAmount: 15
 
   availableSiloStorage: ->
-    space = 50
+    space = 0
     for tile in app.game.map
       space += tile.entity.spaceProvided if tile.entity
     space

src/tiles/tile.coffee

@@ -1,5 +1,6 @@
 class Tile
-  constructor: ->
+  constructor: (position)->
+    @position = position
     @layers = []
     for restype, i in allResourceTypes()
       @layers.push new Tilelayer(

src/tools.coffee

@@ -5,5 +5,12 @@ allResourceTypes = ->
   (k for own k of app.game.resources)
 
 posToTile = (x, y)->
-  pos = (Math.floor(y/8)*20) + Math.floor(x/8)
-  app.game.map[pos]
+  app.game.map[xyToPos(x, y)]
+
+posToXY = (pos)->
+  y = Math.floor(pos/20)
+  x = pos-(y*20)
+  [x, y]
+
+xyToPos = (x, y)->
+  y*20 + x