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Currently, the action space in parabola is infinitely large, which breaks some RL algorithms (e.g. PPO). This change makes the space finite: the interval$[-2 \times bounds, 2 \times bounds]$ . This is because actions are added to the y-coordinate, which is then clipped to be in the interval $[-bounds, bounds]$ .
NB: I haven't actually gotten seals properly working on my laptop, so am hoping that tests get run automatically by some CI process.