def flee(self, others):
#find average point of all other Boids
centerPoint = others.pop(0).position
for other in others:
centerPoint = Point3d.Add(centerPoint, other.position)
centerPoint = Point3d.Divide(centerPoint, numBoids - 1)
#find direction from Boid to average point of all other Boids
direction = Point3d.Subtract(centerPoint, self.position)
#remove magnitude from average-seeking vector
direction = Vector3d.Divide(direction, direction.Length)
#adapt heading to new direction
self.heading = Vector3d.Add(-direction, self.heading)
self.heading = Vector3d.Add(-direction, self.heading)
def update(self, eddies, crv):
self.gettarget_2d(eddies)
self.getorient(eddies)
self.getacc_z()
self.boundarycheck()
self.getvel()
self.loc = PVector.Add(self.loc, self.vel)
def align(self, others):
#generate list of other Boid headings
headings = [other.heading for other in others]
#empty vector creation
uberVector = Vector3d(0.0, 0.0, 0.0)
#add up all headings
for heading in headings:
uberVector = Vector3d.Add(uberVector, heading)
#remove magnitude from sum of all headings
uberVector = Vector3d.Divide(uberVector, uberVector.Length)
#set Boids heading to aligned vector
self.heading = uberVector
def gettarget_2d(self, eddies):
target_2d = PVector(0, 0, 0)
for i in xrange(len(eddies)):
v = PVector.Subtract(eddies[i].loc, self.loc)
v2d = PVector(
v.X, v.Y,
0) # 2d planer target, X Y are the most important factors
dist2d = v2d.Length
# compute the sum of the arraction vector / distance
v2d.Unitize()
v2d = PVector.Multiply(v2d,
float(eddies[i].gravity / pow(dist2d, 1.0)))
# add vector to attraction vector collection
target_2d = PVector.Add(target_2d, v2d)
#Limit the target length
target_2d = toplimit(target_2d, self.toplimit)
target_2d = lowerlimit(target_2d, self.lowerlimit)
self.target = target_2d
def getvel(self):
self.vel = PVector.Add(self.vel, self.orient)
self.vel = toplimit(self.vel, self.toplimit)
self.vel = PVector.Add(self.vel, self.acc)
def maintain(self):
newDirection = Vector3d(random.uniform(-.5,
.5), random.uniform(-.5, .5),
random.uniform(-.5, .5))
self.heading = Vector3d.Add(newDirection, self.heading)
