Point.py 文件源码

def asSpherical(self):
        ''' 
        Computes and returns a representation of this point in spherical coordinates: (r,phi,theta). 

        r = radius or distance of the point from the origin.
        phi = is the angle of the projection on the xy plain and the x axis
        theta = is the angle with the z axis.

        x = r*cos(phi)*sin(theta)
        y = r*sin(phi)*sin(theta)
        z = r*cos(theta)
        '''
        x,y,z,_ = self.asArray()

        r = np.sqrt(x**2+y**2+z**2)
        phi = np.arctan2(y,x)
        theta = np.arctan2(np.sqrt(x**2+y**2),z)

        return r,phi,theta