def velocity_histogram(frames, bins=8, range=(-1., 1.)):
length = range[1] - range[0]
bin_size = length / bins
def hround(v):
return min(bins - 1, int((v - range[0]) / bin_size))
l = list_3d(bins)
for frame in frames:
for hand in frame.hands():
for finger in hand.fingers():
v = finger.velocity()
vector = Leap.Vector(v.x, v.y, v.z)
x = v.x / utils.norm(vector)
y = v.y / utils.norm(vector)
z = v.z / utils.norm(vector)
l[hround(x)][hround(y)][hround(z)] += 1
return l
def _do_actions(self, frame):
"""Perform actions with frame"""
for n, hand in enumerate(frame.hands):
avg_pos = Leap.Vector()
for finger in hand.fingers:
avg_pos += finger.tip_position
avg_pos /= len(hand.fingers)
x_range = X_MAX - X_MIN
try:
action_n = int(avg_pos[0] - X_MIN) / (x_range /
len(self.actions))
except ValueError:
continue
action_y = avg_pos[1] < Y_MID
action = self.actions[action_n][action_y]
self._deck.highlight(action_n, action_y)
action(self._arm)(STEP)
print action
def __init__(self, callback, controller):
super(TempoListener, self).__init__()
self.average_velocity = Leap.Vector(0, 0, 0)
self.angle_history = []
self.velocity_history = []
self.changing = False
self.last_change_time = None
self.bpm = 0
self.callback = callback
self.controller = controller
#settings
self.default_alpha = .3 #for the kalman filters
self.threshold_angle = .7
self.threshold_speed = .1
self.threshold_count = 3
def average_position(vectors):
ave_x = ave([v.x for v in vectors])
ave_y = ave([v.y for v in vectors])
ave_z = ave([v.z for v in vectors])
return Leap.Vector(ave_x, ave_y, ave_z)
def ave_v(vectors):
xs = [v.x for v in vectors]
ys = [v.y for v in vectors]
zs = [v.z for v in vectors]
return Leap.Vector(ave(xs), ave(ys), ave(zs))
def add(vec1, vec2):
return Leap.Vector(vec1.x + vec2.x, vec1.y + vec2.y, vec1.z * vec2.z)
def mul(vec, a):
return Leap.Vector(vec.x * a, vec.y * a, vec.z * a)
