Clipping target q values

[Medabid1]

Hello, I would like to ask question about clipping target q values to just negative numbers in :
https://github.com/TianhongDai/hindsight-experience-replay/blob/master/ddpg_agent.py#L216

Is it due to the fact that the reward is always less than zero, thus the values should be always less than zero ?

Thanks in advance !

[TianhongDai]

@Medabid1 Hi - you're right, because the reward for the fetch environment only have -1 (failed) or 0 (success). Therefore, the return will never be a positive value.