def seperation(self):
steering_force = Vector2D()
for agent in self.world.agents:
if(agent is not self and agent.tagged):
toBot = self.pos - agent.pos
steering_force += Vector2D.normalise(toBot)/Vector2D.length(toBot)
return steering_force
def pursuit(self, evader):
evader.mode = 'wander'
## OPTIONAL EXTRA... pursuit (you'll need something to pursue!)
self.toEvader = evader.pos - self.pos
self.relHeading = Vector2D.dot(evader.heading, self.heading)
if(Vector2D.dot(self.toEvader, self.heading) > 0 and self.relHeading < -0.95):
return self.seek(evader.pos)
lookAheadTime = Vector2D.length(self.toEvader) / (self.max_speed + evader.speed())
return self.seek(evader.pos + evader.vel * lookAheadTime)
def pursuit(self, evader):
''' this behaviour predicts where an agent will be in time T and seeks
towards that point to intercept it. '''
evader.mode = 'flee'
## OPTIONAL EXTRA... pursuit (you'll need something to pursue!)
self.toEvader = evader.pos - self.pos
self.relHeading = Vector2D.dot(evader.heading, self.heading)
if(Vector2D.dot(self.toEvader, self.heading) > 0 and self.relHeading < -0.95):
return self.seek(evader.pos)
lookAheadTime = Vector2D.length(self.toEvader) / (self.max_speed + evader.speed())
return self.seek(evader.pos + evader.vel * lookAheadTime)
def pursuit(self, evader):
''' this behaviour predicts where an agent will be in time T and seeks
towards that point to intercept it. '''
evader.mode = 'flee'
## OPTIONAL EXTRA... pursuit (you'll need something to pursue!)
self.toEvader = evader.pos - self.pos
self.relHeading = Vector2D.dot(evader.heading, self.heading)
if (Vector2D.dot(self.toEvader, self.heading) > 0
and self.relHeading < -0.95):
return self.seek(evader.pos)
lookAheadTime = Vector2D.length(
self.toEvader) / (self.max_speed + evader.speed())
return self.seek(evader.pos + evader.vel * lookAheadTime)
def Hide(self, hunter, objs, delta):
DistToClosest = 1000000
self.BestHidingSpot = None
for hun in hunter:
# check for possible hiding spots
for obj in objs:
HidingSpot = self.GetHidingPosition(hun, obj)
HidingDist = Vector2D.distanceSq(HidingSpot, self.pos)
if HidingDist < DistToClosest and (
Vector2D.length(hun.pos - obj.pos) - hun.radius) > 0:
DistToClosest = HidingDist
self.BestHidingSpot = HidingSpot
# if we have a best hiding spot, use it
if self.BestHidingSpot is not None:
return self.arrive(self.BestHidingSpot, 'fast') # speed = fast?
# default - run away!
return self.pursuit(hunter, delta)
def hide(self,hunter,objs, delta):
DistToClosest = 1000000
self.BestHidingSpot = None
hun = hunter
# check for possible hiding spots
for obj in objs:
HidingSpot = self.getHidingPosition(hun,obj)
HidingDist = Vector2D.distance_sq(HidingSpot,self.pos)
# render the hiding spots immediatly
egi.aqua_pen()
egi.cross(HidingSpot, 5)
if HidingDist < DistToClosest and (Vector2D.length(hun.pos - obj.pos) - hun.radius) > 0:
DistToClosest = HidingDist
self.BestHidingSpot = HidingSpot
# if we have a best hiding spot, use it
if self.BestHidingSpot is not None:
return self.arrive(self.BestHidingSpot, 'fast') # speed = fast?
# default - run away!
return self.runAway(hunter, delta)
