added all original scenarios and solutions (and modified them, because some...

added all original scenarios and solutions (and modified them, because some functions changed) + bug fixes

config.ini

@@ -3,7 +3,7 @@
 ## Different number creates a different random sequence
 seedvalue = 12
 
-## Maximum round number in swarm-world, 0 = infinit
+## Maximum round number in swarm-world, 0 = infinite
 max_round =  0
 
 ## 1 = Call of particles in randmom order 
@@ -31,35 +31,36 @@ gui = default_gui
 ;tile_model_file = 2d_quad_tile.obj
 ;location_model_file = 2d_location.obj
 ;grid_size = 1000
-; end of Quadratic grid configs
+;# end of Quadratic grid configs
 
 
-;# Triangular grid default configs:
-;grid_class = TriangularGrid
-;# .obj (Wavefront) filenames in lib/visualization/models
-;particle_model_file = 2d_particle.obj
-;tile_model_file = 2d_hex_tile.obj
-;location_model_file = 2d_location.obj
-;grid_size = 100
-; end of Triangular grid configs
+# Triangular grid default configs:
+grid_class = TriangularGrid
+# .obj (Wavefront) filenames in lib/visualization/models
+particle_model_file = 2d_particle.obj
+tile_model_file = 2d_hex_tile.obj
+location_model_file = 2d_location.obj
+grid_size = 100
+# end of Triangular grid configs
+
 
-;
 ;# cubic grid default configs:
 ;grid_class = CubicGrid
 ;particle_model_file = 3d_particle_low_poly.obj
 ;tile_model_file = 3d_cube_tile.obj
 ;location_model_file = 3d_location.obj
 ;grid_size = 10
-; end of cubic grid configs
+;# end of cubic grid configs
 
-
-# ccp grid default configs:
-grid_class = CCPGrid
-particle_model_file = 3d_particle.obj
-tile_model_file = 3d_ccp_tile.obj
-location_model_file = 3d_location.obj
-grid_size = 10
-# end of ccp grid configs
+;
+;# ccp grid default configs:
+;grid_class = CCPGrid
+;particle_model_file = 3d_particle.obj
+;tile_model_file = 3d_ccp_tile.obj
+;location_model_file = 3d_location.obj
+;grid_size = 10
+;# end of ccp grid configs
+;
 
 # matter default colors (rgba)
 particle_color = (0.8, 0.3, 0.3, 1.0)
@@ -84,11 +85,11 @@ coordinates_scaling = (0.05, 0.05, 0.05)
 # flag for showing the coordinate models
 show_coordinates = True
 # flag for showing the center of the grid
-show_center = True
+show_center = False
 # camera focus color
 focus_color = (1.0, 1.0, 1.0, 0.5)
 # show camera focus
-show_focus = True
+show_focus = False
 
 # Camera init values
 look_at = (0.0, 0.0, 0.0)
@@ -124,6 +125,6 @@ particle_mm_size = 2
 tile_mm_size = 2
 
 [File]
-scenario = lonely_particle
-solution =  random_walk_with_take_and_drop
+scenario = test_interfaces
+solution =  test_all_the_interfaces
 

gui/default_gui.py

@@ -171,7 +171,7 @@ def get_matter_combo(vis):
     combo.setCurrentIndex(1)
 
     def on_change(value):
-        print(value)
+        vis.set_on_cursor_click_matter_type(value)
 
     combo.currentTextChanged.connect(on_change)
 

lib/matter.py

@@ -95,7 +95,7 @@ class Matter:
         """
         return self.__id
 
-    def set_color(self, color):
+    def set_color(self, color: tuple):
         """
         Sets the matter color
 

lib/particle.py

@@ -274,7 +274,7 @@ class Particle(matter.Matter):
         """
 
         within_hop_list = []
-        for i in range(1, hop + 1):
+        for i in range(hop + 1):
             in_list = self.scan_for_matters_in(matter_type, i)
             if in_list is not None:
                 within_hop_list.extend(in_list)
@@ -302,7 +302,8 @@ class Particle(matter.Matter):
         elif matter_type == "locations":
             scanned_list = scan_in(self.world.location_map_coordinates, self.coordinates, hop, self.world.grid)
         else:
-            scanned_list = scan_in(self.world.particle_map_coordinates, self.coordinates, hop, self.world.grid)
+            scanned_list = []
+            scanned_list.extend(scan_in(self.world.particle_map_coordinates, self.coordinates, hop, self.world.grid))
             scanned_list.extend(scan_in(self.world.tile_map_coordinates, self.coordinates, hop, self.world.grid))
             scanned_list.extend(scan_in(self.world.location_map_coordinates, self.coordinates, hop, self.world.grid))
         return scanned_list
@@ -456,7 +457,7 @@ class Particle(matter.Matter):
             if self.world.grid.are_valid_coordinates(coordinates):
                 logging.info("Going to create a tile on position %s" % str(coordinates))
                 if self.world.add_tile(coordinates):
-                    self.world.tile_map_coordinates[coordinates, coordinates[1]].created = True
+                    self.world.tile_map_coordinates[coordinates].created = True
                     self.world.new_tile_flag = True
                     self.csv_particle_writer.write_particle(tile_created=1)
                     self.world.csv_round.update_tiles_num(len(self.world.get_tiles_list()))
@@ -713,7 +714,7 @@ class Particle(matter.Matter):
                 logging.info("Going to create a particle on position %s" % str(coordinates))
                 new_particle = self.world.add_particle(coordinates)
                 if new_particle:
-                    self.world.particle_map_coordinates[coordinates[0], coordinates[1]].created = True
+                    self.world.particle_map_coordinates[coordinates].created = True
                     logging.info("Created particle on coordinates %s" % str(coordinates))
                     self.world.csv_round.update_particle_num(len(self.world.get_particle_list()))
                     self.world.csv_round.update_metrics(particle_created=1)
@@ -784,20 +785,23 @@ class Particle(matter.Matter):
         :param coordinates
         :return: True: Deleting successful; False: Deleting unsuccessful
         """
-        if coordinates is not None:
-            if self.world.grid.are_valid_coordinates(coordinates):
-                if self.world.remove_particle_on(coordinates):
-                    logging.info("Deleted particle with particle on coordinates %s" % str(coordinates))
-                    self.csv_particle_writer.write_particle(particle_deleted=1)
-                    return True
-                else:
-                    logging.info("Could not delet particle on coordinates %s" % str(coordinates))
-                    return False
-            else:
-                return False
+        if coordinates is None:
+            logging.info("coordinates are 'None'...")
+            return False
+
+        if not self.world.grid.are_valid_coordinates(coordinates):
+            logging.info("invalid coordinates")
+            return False
+
+        if self.world.remove_particle_on(coordinates):
+            logging.info("Deleted particle with particle on coordinates %s" % str(coordinates))
+            self.csv_particle_writer.write_particle(particle_deleted=1)
+            return True
         else:
+            logging.info("Could not delete particle on coordinates %s" % str(coordinates))
             return False
 
+
     def take_particle_with(self, particle_id):
         """
         Takes a particle with a given tile id
@@ -805,24 +809,27 @@ class Particle(matter.Matter):
         :param particle_id:  The id of the particle that should be taken
         :return: True: successful taken; False: unsuccessful taken
         """
-        if self.carried_tile is None and self.carried_particle is None:
-            if particle_id in self.world.get_particle_map_id():
-                logging.info("particle with particle id %s is in the world" % str(particle_id))
-                self.carried_particle = self.world.particle_map_id[particle_id]
-                if self.carried_particle.take_me(self.coordinates):
-                    logging.info("particle with particle id %s  has been taken" % str(particle_id))
-                    self.carried_particle.coordinates = self.coordinates
-                    self.world.vis.particle_changed(self.carried_particle)
-                    self.world.csv_round.update_metrics(particles_taken=1)
-                    self.csv_particle_writer.write_particle(particles_taken=1)
-                    return True
-                else:
-                    logging.info("particle with particle id %s could not be taken" % str(particle_id))
-                    return False
-            else:
-                logging.info("particle with particle id %s is not in the world" % str(particle_id))
+        if self.carried_tile is not None or self.carried_particle is not None:
+            logging.info("particle %s is already carrying a particle or a tile" % str(self.get_id()))
+            return False
+
+        if particle_id not in self.world.get_particle_map_id():
+            logging.info("particle with particle id %s is not in the world" % str(particle_id))
+            return False
+
+        self.carried_particle = self.world.particle_map_id[particle_id]
+        if self.carried_particle.take_me(self.coordinates):
+            logging.info("particle with particle id %s  has been taken" % str(particle_id))
+            self.carried_particle.coordinates = self.coordinates
+            self.world.vis.particle_changed(self.carried_particle)
+            self.world.csv_round.update_metrics(particles_taken=1)
+            self.csv_particle_writer.write_particle(particles_taken=1)
+            return True
         else:
-            logging.info("particle cannot taken because particle is carrieng either a particle or a tile")
+            self.carried_particle = None
+            logging.info("particle with particle id %s could not be taken" % str(particle_id))
+            return False
+
 
     def take_particle_on(self, coordinates):
         """
@@ -832,14 +839,14 @@ class Particle(matter.Matter):
         :return: True: Successful taken; False: Cannot be taken or wrong Coordinates
         """
 
-        if self.world.grid.are_valid_coordinates(coordinates):
-            if coordinates in self.world.particle_map_coordinates:
-                return self.take_particle_with(self.world.particle_map_coordinates[coordinates].get_id())
-            else:
-                logging.info("Particle is not in the world")
-                return False
+        if not self.world.grid.are_valid_coordinates(coordinates):
+            logging.info("Coordinates are invalid")
+            return False
+
+        if coordinates in self.world.particle_map_coordinates:
+            return self.take_particle_with(self.world.particle_map_coordinates[coordinates].get_id())
         else:
-            logging.info("Coordinates are wrong")
+            logging.info("There is no particle on %s" % str(coordinates))
             return False
 
     def take_particle_in(self, direction):
@@ -900,7 +907,7 @@ class Particle(matter.Matter):
             else:
                 logging.info("invalid coordinates")
         else:
-            logging.info("drop_particle_on: Wrong Inputs")
+            logging.info("drop_particle_on: coordinates are 'None' or not carrying a particle")
             return False
 
     def update_particle_coordinates(self, particle, new_coordinates):

lib/swarm_sim_header.py

@@ -26,15 +26,26 @@ def eprint(*args, sep=' ', end='\n'):
 
 def get_coordinates_in_direction(coordinates, direction):
     """
-    Returns the coordination data of the pointed directions
+    Returns the coordinates data of the pointed directions
 
     :param coordinates: particles actual staying coordination
     :param direction: The direction. Options:  E, SE, SW, W, NW, or NE
-    :return: The coordinaiton of the pointed directions
+    :return: The coordinates of the pointed directions
     """
     return coordinates[0] + direction[0], coordinates[1] + direction[1], coordinates[2] + direction[2]
 
 
+def get_multiple_steps_in_direction(start, direction, steps):
+    """
+    returns coordinates of the point from the start variable in x steps in the given direction
+    :param start: the starting point
+    :param direction: the direction
+    :param steps: the amount of steps
+    :return: coordinates (float, float, float)
+    """
+    return start[0] + (direction[0] * steps), start[1] + (direction[1] * steps), start[2] + (direction[2] * steps)
+
+
 def scan_in(matter_map: dict, center, hop, grid):
     result = []
     n_sphere_border = grid.get_n_sphere_border(center, hop)
@@ -66,3 +77,4 @@ def create_matter_in_line(world, start, direction, amount, matter_type='particle
             print("create_matter_in_line: unknown type (allowed: particle, tile or location")
             return
         current_position = get_coordinates_in_direction(current_position, direction)
+

lib/vis3d.py

@@ -9,6 +9,7 @@ import time
 from lib.visualization.camera import Camera
 from lib.visualization.utils import LoadingWindow
 
+import OpenGL.GL as GL
 
 def close(_):
     exit(0)
@@ -30,7 +31,7 @@ class Visualization:
         self._viewer = None
         self._gui = None
         self._splitter = None
-        self.light_rotation = True
+        self.light_rotation = False
 
         # create the QApplication
         self._app = QApplication([])
@@ -184,7 +185,7 @@ class Visualization:
         :param round_start_timestamp: timestamp of the start of the round.
         :return:
         """
-        # draw scene
+        # update and draw scene
         self._viewer.update_data()
         self._viewer.glDraw()
         # waiting until simulation starts
@@ -193,13 +194,17 @@ class Visualization:
         time_elapsed = time.perf_counter() - round_start_timestamp
         # sleeping time - max 1/120 for a responsive GUI
         sleep_time = min(1.0 / 120, (1.0 / self._rounds_per_second) / 10.0)
-        while time_elapsed < 1 / self._rounds_per_second:
+        max_wait_time = 1 / self._rounds_per_second
+        while time_elapsed < max_wait_time:
             # waiting for 1/100 of the round_time
             time.sleep(sleep_time)
             # check if still running... if not wait (important for low rounds_per_second values)
             self._wait_while_not_running()
             time_elapsed = time.perf_counter() - round_start_timestamp
 
+        GL.glFinish()
+        end = time.perf_counter_ns()
+
     def remove_particle(self, particle):
         """
         removes a particle from the visualization.
@@ -350,9 +355,7 @@ class Visualization:
         return self._viewer.programs["grid"].get_model_scaling()
 
     def set_grid_coordinates_scaling(self, scaling):
-        print(2)
         self._viewer.programs["grid"].set_model_scaling(scaling)
-        print(2)
         self._viewer.glDraw()
 
     def get_render_distance(self):
@@ -412,4 +415,9 @@ class Visualization:
         return self._viewer.programs["location"].get_model_scaling()
 
     def set_location_scaling(self, scaling):
-        self._viewer.programs["location"].set_model_scaling(scaling)
\ No newline at end of file
+        self._viewer.programs["location"].set_model_scaling(scaling)
+
+    def set_on_cursor_click_matter_type(self, matter_type):
+        if matter_type == 'tile' or matter_type == 'particle' or matter_type == 'location':
+            self._viewer.cursor_type = matter_type
+            self._viewer.update_cursor_data()

lib/visualization/OGLWidget.py

 import inspect
 
-import OpenGL.GL as gl
+import OpenGL.GL as GL
 from PIL import Image
 from PyQt5 import QtOpenGL, QtGui, QtCore
 
@@ -20,11 +20,6 @@ class OGLWidget(QtOpenGL.QGLWidget):
         :param world: the world class
         :param camera: a camera for the visualization
         """
-        # fmt = QtOpenGL.QGLFormat()
-        # fmt.setVersion(3, 3)
-        # # needs to be in compatibility profile, because of glLineWidth
-        # fmt.setProfile(QtOpenGL.QGLFormat.CompatibilityProfile)
-        # fmt.setSampleBuffers(True)
         super(OGLWidget, self).__init__()
 
         self.debug = False
@@ -41,6 +36,7 @@ class OGLWidget(QtOpenGL.QGLWidget):
         self.rotation_sensitivity = 5
         self.zoom_sensitivity = 100
         self.cursor_zoom_sensitivity = 200
+        self.cursor_type = 'tile'
 
         self.camera = camera
 
@@ -120,27 +116,22 @@ class OGLWidget(QtOpenGL.QGLWidget):
         :return:
         """
         # set global openGL settings
-        gl.glEnable(gl.GL_DEPTH_TEST)
-        gl.glEnable(gl.GL_BLEND)
-        gl.glEnable(gl.GL_LINE_SMOOTH)
-        gl.glEnable(gl.GL_CULL_FACE)
-        gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
-        gl.glClearColor(*self.background, 1.0)
-
-        print(1)
+        GL.glEnable(GL.GL_DEPTH_TEST)
+        GL.glEnable(GL.GL_BLEND)
+        GL.glEnable(GL.GL_LINE_SMOOTH)
+        GL.glEnable(GL.GL_CULL_FACE)
+        GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
+        GL.glClearColor(*self.background, 1.0)
+
         # initialize the openGL programs
         self.programs["particle"] = OffsetColorCarryProgram(self.world.config_data.particle_model_file)
         self.programs["particle"].set_world_scaling(self.world.grid.get_scaling())
-        print(1)
 
         self.programs["tile"] = OffsetColorCarryProgram(self.world.config_data.tile_model_file)
         self.programs["tile"].set_world_scaling(self.world.grid.get_scaling())
 
-        print(1)
         self.programs["location"] = OffsetColorProgram(self.world.config_data.location_model_file)
-        print(1)
         self.programs["location"].set_world_scaling(self.world.grid.get_scaling())
-        print(1)
 
         self.programs["grid"] = GridProgram(self.world.grid, self.world.config_data.line_color,
                                             self.world.config_data.coordinates_color,
@@ -168,11 +159,24 @@ class OGLWidget(QtOpenGL.QGLWidget):
         self.programs["focus"].update_offsets(self.camera.get_look_at())
         self.programs["focus"].update_colors(self.world.config_data.focus_color)
 
-        self.programs["cursor"] = OffsetColorProgram(self.world.config_data.tile_model_file)
-        self.programs["cursor"].set_world_scaling(self.world.grid.get_scaling())
-        self.programs["cursor"].set_model_scaling((1.1, 1.1, 1.1))
-        self.programs["center"].update_offsets([0.0, 0.0, 0.0])
-        self.programs["cursor"].update_colors(self.world.config_data.cursor_color)
+        # cursor programs.. loading in the init, so on change it doesnt has to be loaded again
+        self.programs["cursor_tile"] = OffsetColorProgram(self.world.config_data.tile_model_file)
+        self.programs["cursor_tile"].set_world_scaling(self.world.grid.get_scaling())
+        self.programs["cursor_tile"].set_model_scaling((1.1, 1.1, 1.1))
+        self.programs["cursor_tile"].update_offsets([0.0, 0.0, 0.0])
+        self.programs["cursor_tile"].update_colors(self.world.config_data.cursor_color)
+
+        self.programs["cursor_particle"] = OffsetColorProgram(self.world.config_data.particle_model_file)
+        self.programs["cursor_particle"].set_world_scaling(self.world.grid.get_scaling())
+        self.programs["cursor_particle"].set_model_scaling((1.1, 1.1, 1.1))
+        self.programs["cursor_particle"].update_offsets([0.0, 0.0, 0.0])
+        self.programs["cursor_particle"].update_colors(self.world.config_data.cursor_color)
+
+        self.programs["cursor_location"] = OffsetColorProgram(self.world.config_data.location_model_file)
+        self.programs["cursor_location"].set_world_scaling(self.world.grid.get_scaling())
+        self.programs["cursor_location"].set_model_scaling((1.1, 1.1, 1.1))
+        self.programs["cursor_location"].update_offsets([0.0, 0.0, 0.0])
+        self.programs["cursor_location"].update_colors(self.world.config_data.cursor_color)
 
     def resizeGL(self, width, height):
         """
@@ -188,7 +192,7 @@ class OGLWidget(QtOpenGL.QGLWidget):
         self.camera.set_viewport(width, height)
 
         # set the openGL viewport
-        gl.glViewport(0, 0, width, height)
+        GL.glViewport(0, 0, width, height)
 
         # update matrices
         self.update_scene()
@@ -225,7 +229,9 @@ class OGLWidget(QtOpenGL.QGLWidget):
         updates the position of the cursor
         :return:
         """
-        self.programs["cursor"].update_offsets(self.world.grid.get_nearest_valid_coordinates(self.camera.cursor_position))
+        # updating only the current cursor program
+        self.programs["cursor_"+self.cursor_type].update_offsets(
+            self.world.grid.get_nearest_valid_coordinates(self.camera.cursor_position))
 
     def rotate_light(self, angle):
         """
@@ -244,7 +250,7 @@ class OGLWidget(QtOpenGL.QGLWidget):
         :return:
         """
         # clear the screen
-        gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
+        GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
 
         # draw
         self.programs["particle"].draw()
@@ -258,7 +264,7 @@ class OGLWidget(QtOpenGL.QGLWidget):
 
         # cursor
         if self.ctrl:
-            self.programs["cursor"].draw()
+            self.programs["cursor_"+self.cursor_type].draw()
 
         if self.show_focus:
             self.programs["focus"].draw()
@@ -273,10 +279,21 @@ class OGLWidget(QtOpenGL.QGLWidget):
         # starting dragging
         if self.ctrl and int(a0.buttons()) & QtCore.Qt.LeftButton:
             nl = self.world.grid.get_nearest_valid_coordinates(self.camera.cursor_position)
-            if nl in self.world.tile_map_coordinates:
-                self.world.remove_tile_on(nl)
-            else:
-                self.world.add_tile(nl)
+            if self.cursor_type == 'tile':
+                if nl in self.world.tile_map_coordinates:
+                    self.world.remove_tile_on(nl)
+                else:
+                    self.world.add_tile(nl)
+            if self.cursor_type == 'particle':
+                if nl in self.world.particle_map_coordinates:
+                    self.world.remove_particle_on(nl)
+                else:
+                    self.world.add_particle(nl)
+            if self.cursor_type == 'location':
+                if nl in self.world.location_map_coordinates:
+                    self.world.remove_location_on(nl)
+                else:
+                    self.world.add_location(nl)
             self.update_data()
             self.glDraw()
         else:
@@ -401,8 +418,8 @@ class OGLWidget(QtOpenGL.QGLWidget):
         takes a screenshot of the OpenGLWidget. saves it with a random name in the screenshots folder.
         :return:
         """
-        gl.glReadBuffer(gl.GL_FRONT)
-        pixels = gl.glReadPixels(0, 0, self.width(), self.height(), gl.GL_RGB, gl.GL_UNSIGNED_BYTE)
+        GL.glReadBuffer(GL.GL_FRONT)
+        pixels = GL.glReadPixels(0, 0, self.width(), self.height(), GL.GL_RGB, GL.GL_UNSIGNED_BYTE)
         i = Image.frombytes('RGB', (self.width(), self.height()), pixels, 'raw')
         import os
         if os.path.exists("screenshots") and os.path.isdir("screenshots"):
@@ -412,5 +429,5 @@ class OGLWidget(QtOpenGL.QGLWidget):
                    "Please create it in the running directory before taking screenshots.")
 
     def set_background_color(self, color):
-        gl.glClearColor(*color, 1.0)
+        GL.glClearColor(*color, 1.0)
         self.glDraw()

lib/world.py

@@ -384,7 +384,7 @@ class World:
         :return: True: Successful removed; False: Unsuccessful
         """
         if coordinates in self.particle_map_coordinates:
-            return self.remove_particle(self.particle_map_coordinates[coordinates])
+            return self.remove_particle(self.particle_map_coordinates[coordinates].get_id())
         else:
             return False
 

scenario/n_particle_in_line.py

@@ -5,4 +5,4 @@ import random
 def scenario(world):
     amount = 10
     direction = random.choice(world.grid.get_directions_list())
-    create_matter_in_line(world, world.grid.get_center(), direction, amount, 'particle')
+    create_matter_in_line(world, world.grid.get_center(), direction, amount, 'location')

scenario/particles_tiles_locations_ring.py

+"""
+A world is created that has particles formated in a ring structure that is up to 5 hops big
+"""
+
+
+def scenario(world):
+
+    world.add_particle(world.grid.get_center())
+
+    particle_ring = world.grid.get_n_sphere_border((0, 0, 0), 1)
+    tile_ring = world.grid.get_n_sphere_border((0, 0, 0), 3)
+    location_ring = world.grid.get_n_sphere_border((0, 0, 0), 5)
+
+    for p in particle_ring:
+        world.add_particle(p)
+
+    for t in tile_ring:
+        world.add_tile(t)
+
+    for l in location_ring:
+        world.add_location(l)

scenario/test_interfaces.py

+
+from lib.swarm_sim_header import get_coordinates_in_direction, get_multiple_steps_in_direction
+
+
+def scenario(world):
+
+    dirs = world.grid.get_directions_list()
+
+    world.add_particle(world.grid.get_center(), color=(1.0, 0.0, 0.0, 1.0))
+    tile_pos = get_coordinates_in_direction(world.grid.get_center(), dirs[0])
+    world.add_tile(tile_pos)
+    loc_pos = get_coordinates_in_direction(tile_pos, dirs[1])
+    world.add_location(loc_pos)
+
+    # 1st ring
+    ring1 = world.grid.get_n_sphere_border(world.grid.get_center(), 1)
+
+    for m in ring1:
+        world.add_particle(m, color=(0.2, 0.2, 0.2, 1.0))
+
+    # 2nd ring
+    ring2 = world.grid.get_n_sphere_border(world.grid.get_center(), 2)
+
+    for m in ring2:
+        world.add_particle(m, color=(0.5, 0.5, 0.5, 1.0))
+
+    tile_pos1 = get_multiple_steps_in_direction(world.grid.get_center(), dirs[0], 4)
+    tile_pos2 = get_multiple_steps_in_direction(tile_pos1, dirs[1], 2)
+    tile_pos3 = get_multiple_steps_in_direction(tile_pos2, dirs[2], 2)
+    tile_pos4 = get_multiple_steps_in_direction(tile_pos3, dirs[3], 2)
+
+    world.add_tile(tile_pos1)
+    world.add_tile(tile_pos2)
+    world.add_tile(tile_pos3)
+    world.add_tile(tile_pos4)
+