Allow knife to slice into fruit

fruit_catcher/catcher.py

@@ -1,4 +1,5 @@
 from random import randint
+from .fruit import FruitPiece
 
 class CatcherPiece:
     character = "-"
@@ -28,10 +29,21 @@ class Catcher:
             new_x = max(0, x - 3)
             self.position = (new_x, y)
             self.update_piece_positions()
+            self.check_fruit_collisions(game)
         if keystroke.name == "KEY_RIGHT":
             new_x = min(width - self.width, x + 3)
             self.position = (new_x, y)
             self.update_piece_positions()
+            self.check_fruit_collisions(game)
+
+    def check_fruit_collisions(self, game):
+        agents_by_pos = game.get_agents_by_position()
+        seen = set()
+        for piece in self.pieces:
+            for agent in agents_by_pos.get(piece.position, []):
+                if isinstance(agent, FruitPiece) and agent.parent.alive and id(agent.parent) not in seen:
+                    seen.add(id(agent.parent))
+                    agent.parent.check_catcher_collision(game)
 
     def create_pieces(self, game):
         x, y = self.position

fruit_catcher/fruit.py

@@ -17,6 +17,7 @@ class FruitPiece:
         self.position = position
         self.color = color
         self.z = z
+        self.parent = None
 
 class Fruit:
     display = False
@@ -67,6 +68,7 @@ class Fruit:
         x, y = self.position
         ox, oy = offset
         piece = FruitPiece((x + ox, y + oy), self.color, z)
+        piece.parent = self
         self.pieces[offset] = piece
         game.add_agent(piece)