Observation space dimension wrong?

[baoyunfan]

It looks like the env returns observation space shape of Box(480, 640, 3), while the actual frame returned by step() has a shape of (200, 400, 3). For me the frames need to be rotated 90 degrees clockwise to match the actual game screen.

The obs space dimensions seem to be hard-wired in tetris_env.py. I wonder if line 6 should be instead,
SCREEN_WIDTH, SCREEN_HEIGHT = 200,400
Also, line 17 should be,
self.observation_space = spaces.Box(low=0, high=255, shape=(SCREEN_WIDTH, SCREEN_HEIGHT, 3))

Thanks!

[lusob]

Hi! @baoyunfan
Could you make a pull request with the patch?
Thanks!