Novel Reward warning issue

[CAI23sbP]

@zzuxzt Hi there, I want to use VO-novel reward for my robot.
In my case, the robot radius is 0.6m. How to modified your code in VO-novel reward?

Here is your code.

if(ped_dis <= 7):
ped_theta = np.arctan2(p_y, p_x)
vo_theta = np.arctan2(3self.robot_radius, np.sqrt(ped_dis**2 - (3self.robot_radius)**2))

When i run this i have a single warning issue, see under code

rewards/drl_vo_reward.py:113: RuntimeWarning: invalid value encountered in sqrt
vo_theta = np.arctan2(3self.robot_radius, np.sqrt(ped_dis**2 - (3self.robot_radius)**2))