def cross_sign(vertex, edge, point):
""" Compute the cross sign between the edge vector and (point - vertex) vector. """
cross_sign = sign(edge.cross(point - vertex))
if round(cross_sign, 7) == 0: # Point on edge
return True
else:
return cross_sign < 0
def orientation_with(self, direction):
# Fixme: check all cases
# -> angle_with
""" Return the angle of self on direction """
angle = math.acos(self.cos_with(direction))
angle_sign = sign(self.sin_with(direction))
return angle_sign * math.degrees(angle)
