remove obsolete functions and imports, add license

sim.py

@@ -1,6 +1,8 @@
+# By Nekkowe 2023-10-01
+# nekkowe.com / nekkowe@gmail.com
+# Released under CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/deed.en
 import numpy as np
-from enum import Enum, auto
-import matplotlib.pyplot as plt
+from enum import Enum
 from dataclasses import dataclass
 
 class Direction(Enum):
@@ -103,19 +105,21 @@ class Environment:
         return np.array(pixel_data).astype(np.uint8).swapaxes(0, 1)
     
     def eat(self, position):
-        resources = self.resource_map[tuple(position)]
-        self.resource_map[tuple(position)] = 0
+        resources = self.get_resources(position)
+        self.set_resources(position, 0)
         return resources
 
-    def cell(self, position):
-        x, y = tuple(position)
-        return self.cells[y][x]
-
     def has_obstacle(self, position):
         return self.obstacle_map[tuple(position)] == 1
 
     def has_agent(self, position):
         return tuple(position) in {tuple(agent.position) for agent in self.agents}
+    
+    def get_resources(self, position):
+        return self.resource_map[tuple(position)]
+
+    def set_resources(self, position, resources):
+        self.resource_map[tuple(position)] = 0
 
     def register_agent(self, agent):
         self.agents.append(agent)
@@ -262,5 +266,3 @@ class CAMSReverseAndSidestepAgent(DirectionalAgent):
             return [255, 0, 0]
         else:
             return Colours.UNDEFINED
-
-