bug fix for pausing during boss battle

engine/graphics.py

@@ -111,6 +111,7 @@ def __init__(self, game, background, auto_scroll = True):
         self.coordinate = 0  # left edge of viewport
         self.last_coordinate = 0
         self.level_pos = 11000
+        self.draw_pos = 0
         self.minScroll = 0 # max value for left scrolling
         self.maxScroll = self.background.get_width() - 320 # max for right
         self.advance_velocity = 100  # speed of scroll
@@ -121,7 +122,7 @@ def __init__(self, game, background, auto_scroll = True):
 
     def update(self):
 
-        if not self.game.paused:
+        if not self.game.paused and not self.game.boss_level:
             self.last_coordinate = self.coordinate
 
             self.coordinate += self.advance_velocity * system.TIMESTEP
@@ -143,7 +144,7 @@ def draw(self, screen):
         # create new subsurface from updated coordinate
         # draw it to the screen
         draw_pos = self.game.interpolate_draw(self.coordinate, 
-                                              self.last_coordinate)
+                                              self.last_coordinate, self.game.boss_level)
         self.vp = self.background.subsurface((draw_pos, 0, self.width,
                                               self.height))
         screen.blit(self.vp, (0,0))

engine/system.py

@@ -497,11 +497,15 @@ def change_state(self, state, transition = None):
         self.states.append(state)
         state.activate(transition)
 
-    def interpolate_draw(self, current, last):
+    def interpolate_draw(self, current, last, boss_level):
         # returns an interpolated draw position
+
         if not self.paused:
-           draw_pos = current * self.alpha + last * (1.0 - self.alpha)
-        else:
+            draw_pos = current * self.alpha + last * (1.0 - self.alpha)
+            # if in boss level, background is not scrolling, always return 0
+            if boss_level:
+                draw_pos = 0
+        else: # if paused return the last coordinate passed in
            draw_pos = current
         return draw_pos
 

states.py

@@ -142,8 +142,7 @@ def handle_input(self):
 
         # On start button press, push the pause state
         if self.game.input_manager.is_pressed('START'):
-            if not self.game.boss_level:
-                self.game.push_state(PauseState(self.game))
+            self.game.push_state(PauseState(self.game))
 
     def update(self):
         #print (self.viewport.level_pos + self.game.game_world.width) / 16
@@ -178,7 +177,7 @@ def update(self):
 
         # If player has reached the end of the level, create a
         # level complete message
-        print self.viewport.level_pos
+        #print self.viewport.level_pos
         if self.viewport.level_pos > 11500: #1150 
             end = self.game.next_level()
             if not end:  # go to next level