Added translucency.

robotgame/block.py

@@ -24,6 +24,8 @@
 A generic block.
 """
 
+import pygame
+
 import worldobject
 
 class Block(worldobject.WorldObject):
@@ -31,6 +33,14 @@ class Block(worldobject.WorldObject):
         self.__dict__.update(locals())
         worldobject.WorldObject.__init__(self, level, x, y, movable=movable)
 
+        self.orig_alpha = pygame.surfarray.array_alpha(self.img)
+
+    def update_alpha(self):
+        if (self.y + self.z >= self.level.player.y + self.level.player.z):
+            self.set_alpha(0.5)
+        else:
+            self.set_alpha(1)
+
     def use(self, obj):
         if obj == self.holder:
             obj.holding = None