import math
import numpy as np


class Geometry:
  def __init__(self, delta=0.5):
    self._delta = delta

  def almost_equal(self, v1, v2):
    delta = math.sqrt(pow((v1[0]-v2[0]), 2) + pow((v1[1]-v2[1]), 2) + pow((v1[2]-v2[2]), 2))
    return delta <= self._delta

  @staticmethod
  def to_points_matrix(points, remove_last=False):
    rows = points.size//3
    points = points.reshape(rows, 3)
    if remove_last:
      points = np.delete(points, rows-1, 0)
    return points