def flock(self, showing_flockmates):
# NetLogo allows one to specify the units within the Gui widget.
# Here we do it explicitly by multiplying by BLOCK_SPACING().
vision_limit_in_pixels = gui_get('vision') * BLOCK_SPACING()
flockmates = self.agents_in_radius(vision_limit_in_pixels)
if len(flockmates) > 0:
# If showing_flockmates, create links to flockmates if they don't already exist.
if showing_flockmates:
for flockmate in flockmates:
# Don't make a link if it already exists.
if not link_exists(self, flockmate):
Link(self, flockmate, color=Color('skyblue3'))
nearest_neighbor = min(
flockmates, key=lambda flockmate: self.distance_to(flockmate))
min_separation = gui_get('minimum separation') * BLOCK_SPACING()
if self.distance_to(nearest_neighbor) < min_separation:
self.separate(nearest_neighbor)
else:
self.align(flockmates)
self.cohere(flockmates)
def flock(self):
# NetLogo allows one to specify the units within the Gui widget.
# Here we do it explicitly by multiplying by BLOCK_SPACING().
vision_limit_in_pixels = self.get_gui_value('vision') * BLOCK_SPACING()
flockmates = self.agents_in_radius(vision_limit_in_pixels)
if len(flockmates) > 0:
nearest_neighbor = min(
flockmates, key=lambda flockmate: self.distance_to(flockmate))
min_separation = self.get_gui_value(
'minimum separation') * BLOCK_SPACING()
if self.distance_to(nearest_neighbor) < min_separation:
self.separate(nearest_neighbor)
else:
self.align(flockmates)
self.cohere(flockmates)
def update_velocity(self):
velocity = self.velocity
influence_radius = gui_get('Influence radius')
neighbors = self.agents_in_radius(influence_radius * BLOCK_SPACING())
for neighbor in neighbors:
force = Agent.forces_cache.get((neighbor, self), None)
if force is None:
force = force_as_dxdy(self.center_pixel, neighbor.center_pixel)
Agent.forces_cache[(neighbor, self)] = force * (-1)
velocity = velocity + force
speed_factor = gui_get('Speed factor')
self.set_velocity(normalize_dxdy(velocity, 1.5 * speed_factor / 100))
def draw(self, shape_name=None):
super().draw(shape_name=shape_name)
if self.highlighted:
radius = round((BLOCK_SPACING() / 2) * self.scale * 1.5)
circle(gui.SCREEN, Color('red'), self.rect.center, radius, 1)