Blocks, depth, holding and releasing objects, etc.

robotgame/worldobject.py

@@ -25,17 +25,44 @@ A generic world object.
 """
 
 class WorldObject(object):
-    def __init__(self, x, y, speed=5, tile_x=64, tile_y=48):
+    def __init__(self, level, x, y, z=0, direction=(1, 0), speed=5,
+                 tile_x=64, tile_y=48,
+                 movable=False):
         self.__dict__.update(locals())
 
         self.move_x = self.x = self.x - (self.x % self.tile_x)
         self.move_y = self.y = self.y - (self.y % self.tile_y)
 
+        self.holding = None
+        self.holder = None
+
+    def check_move(self, move_x, move_y):
+        if self.move_x == self.x and self.move_y == self.y and self.movable:
+            for obj in self.level.objects:
+                if (obj.x == self.x + move_x * self.tile_x
+                    and obj.y == self.y + move_y * self.tile_y
+                    and obj != self and obj != self.holder
+                    and obj != self.holding):
+                    return False
+            return True
+        return False
+
     def move(self, move_x, move_y):
-        if self.move_x == self.x and self.move_y == self.y:
+        if self.check_move(move_x, move_y):
+
+            if self.holding:
+                if not self.holding.check_move(move_x, move_y):
+                    return False
+
             self.move_x += move_x * self.tile_x
             self.move_y += move_y * self.tile_y
 
+            if self.holding:
+                self.holding.move(move_x, move_y)
+
+    def use(self):
+        pass
+
     def update(self, e, t, dt):
         if self.x > self.move_x:
             self.x -= min(self.speed * dt * self.tile_x,