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kevinhughes27 / TensorKart

self-driving MarioKart with TensorFlow
MIT License
1.57k stars 254 forks source link

Model Trained: Straight Line #61

Closed ghost closed 6 years ago

ghost commented 6 years ago

Hello,

I was trying run the trained model and I thought that maybe the player was going in straight line due to lack of training nevertheless after generating the model with samples for around 6 races the behavior is still the same, any ideas about what the issue might be? For example the easiest track is Luigis racetrack and as soon as the player gets to the first curve the model is not reacting as expeted I think. I am not seeing the values between -80 and 80. Is worth to mention that I did double check the Joystick samples and those are ok going from -1 to 1 according to the record.py file.

Best Regards!

bzier commented 6 years ago

The recording of the samples is between [-1, 1] as you see. That is handled in play.py by scaling by 80. See here.

When you are running play.py the console should be printing the controller output. What kinds of values are you seeing? Can you show a screenshot?

Another thing worth pointing out is that the training process can end up 'ignoring' the steering values because it can be pretty jittery. See #49 and this discussion starting here-ish. In both discussions, Kevin mentions the problem with aliasing with respect to turns. He also explains it a bit in his blog here in the section "Playing Revisited", specifically point 2. My guess is that you may be encountering the same thing.

ghost commented 6 years ago

Thanks for the info Brian, I think that you can close the ticket, I guess my driving was not sufficiently smooth to properly train the model. Now its working. Thanks.