HackerRank Python - Class 2 - Find the Torsional Angle
Class 2 - Find the Torsional Angle
- import math
-
- class Points(object):
- def __init__(self, x, y, z):
- self.x = x
- self.y = y
- self.z = z
-
- def __sub__(self, no):
- return Points((self.x - no.x), (self.y - no.y), (self.z - no.z))
-
- def dot(self, no):
- return (self.x * no.x) + (self.y * no.y) + (self.z * no.z)
-
- def cross(self, no):
- return Points((self.y * no.z - self.z * no.y), (self.z * no.x - self.x * no.z), (self.x * no.y - self.y * no.x))
-
- def absolute(self):
- return pow((self.x ** 2 + self.y ** 2 + self.z ** 2), 0.5)
-
-
-
- if __name__ == '__main__':
- points = list()
- for i in range(4):
- a = list(map(float, input().split()))
- points.append(a)
-
- a, b, c, d = Points(*points[0]), Points(*points[1]), Points(*points[2]), Points(*points[3])
- x = (b - a).cross(c - b)
- y = (c - b).cross(d - c)
- angle = math.acos(x.dot(y) / (x.absolute() * y.absolute()))
-
- print("%.2f" % math.degrees(angle))